To Chip or Not to Chip...That is the Question

[need2speed]

I'm in a bit of a quandry regarding the current state of tune for need2speed. She has been de-catted, resonator deleted, K&N filters installed, and a '92 LH module. I've also installed a euro-spec non-cat EZL trim plug which changes the ignition curve to suit. The car runs well and idles smoothly.

BUT...I have this Superchips EPROM sitting here and wonder what effect it might have? With my previous '94 LH module the chip did not remove the top speed limiter, which was my original goal with chipping. It seemed to improve mid to upper-range performance at the expense of a lumpy idle and low speed surging. I also found that the LH module learned to accept only this chip when I plugged the factory EPROM back in after a few years of running the Superchip...the result was it wouldn't start with anything else! The cure was to replace the LH module, which I'm reluctant to risk again.

According to some old literature from Superchips, their mods remap the fuel and ignition curves to optimize for high octane fuel. Well, since our cars only use premium and since I've already modified the ignition curve...can I expect the Superchips EPROM to still help with my intake and exhaust mods?

Any thoughts or experiences would be appreciated

 

[2phast]

In a ideal world, a pre-programmed ecu chip increases performance based on the assumption that the remainder of the car is basically stock. Its already been proven that ECU chips for the 500e do not increase HP.

If you change your intake, or exhaust or install other performance mods such as headers, the chip needs to be re-programmed to take these changes into consideration.

 

[need2speed]

OK Rik (or anyone else in the know), do you know if the chip in our LH module can be re-flashed with today's modern technology? Has anyone developed fuel and ignition map profiles for the M119?

 

[Alpina]

After i Decided to tune my BT and also deleted the MAF on my cabrio ,, i would NEVER ,, i repeat NEVER buy a chip that is made by some one and not testet by lambda sensor or whatever on the car ,, many engines are different as the same engine and IMO induvideal reprogram on every car is absolutly the best tune if possible,,


after research i have read that oem M-B software is the best overall program for 124036,,

 

[gerryvz]

I've never been convinced that Superchips supposed chip for the E500E was actually for that car. I think it was a generic chip that may have been slightly modified or was for another MB model and just had the E500E added to the list because it had an M119 V-8.

I've tested a few chips, and Dave has tested them in even more of a rigorous manner than I have. Neither of us (nor anyone else for that matter) has found any brand of chip to add notable/significant horsepower to the engine. I think the bottom line is that MB pretty much did their homework, and there is very little -- IF ANY -- incremental HP to be found on our iteration of the M119 through chip tuning.

Cheers,
Gerry

 

[Alpina]

I've never been convinced that Superchips supposed chip for the E500E was actually for that car. I think it was a generic chip that may have been slightly modified or was for another MB model and just had the E500E added to the list because it had an M119 V-8.

I've tested a few chips, and Dave has tested them in even more of a rigorous manner than I have. Neither of us (nor anyone else for that matter) has found any brand of chip to add notable/significant horsepower to the engine. I think the bottom line is that MB pretty much did their homework, and there is very little -- IF ANY -- incremental HP to be found on our iteration of the M119 through chip tuning.

Cheers,
Gerry

Well said Gerry,, and imo the facts,,

But,!!!!!! this electronic data WIZARD,, Mr.x is a true genius in Engine management systems,, we had a Plan that he should open the ECU on my ex. E500E (ME 945) 2 years ago .. but he had so much to do reprogramming other cars that we ran out of time

 

[need2speed]

I can agree that a chip doesn't give "magical" power out of thin air (well except for the 60HP produced in my old Audi TQ)...but I believe they do move the power around on the HP and torque curves. There may also be minor HP gains available from richening the fuel and advancing the ignition IF air and exhaust flow will allow.

So I gather that the LH Jetronic can't be "flashed"?

 

[Prime]

Maybe a stupid question - can a chip "re-add" the WOT fuel enrichment that was taken away after 1992 MY or is that controlled elsewhere in the system?

 

[gerryvz]

I can agree that a chip doesn't give "magical" power out of thin air (well except for the 60HP produced in my old Audi TQ)...but I believe they do move the power around on the HP and torque curves. There may also be minor HP gains available from richening the fuel and advancing the ignition IF air and exhaust flow will allow.

So I gather that the LH Jetronic can't be "flashed"?

Yes. That's what the empirical evidence has shown with the E500E LH system and various "ROMs" available. They move the power and torque curves around, but don't truly provide significant -- if any -- incremental HP. Perhaps some of this moving around of HP is useful in specific applications, such as drag racing or high-speed road racing. But I continue to believe that MB has provided a near-optimal setting of torque and power curves with the stock settings.

Some cars (as evidenced by your Audi, and various BMWs for example) CAN be flashed to provide incremental HP. But this is because there is ample HP to be had, either because the factory left that in the system, or perhaps didn't engineer things "to the max" for some reason ... emissions, engine reliability, regulatory, etc.

The LH system *CAN* be "flashed". In fact, I have heard that the MB factory has provided several software updates (only available through dealers) over the years for the E500E LH system that have, in fact, are applied by mechanics through a "flash" mechanism to update the EEPROM with new software.

Maybe a stupid question - can a chip "re-add" the WOT fuel enrichment that was taken away after 1992 MY or is that controlled elsewhere in the system?

I have heard -- but not observed first-hand -- this happening with certain aftermarket chips, not the chip by itself.

I don't know if anyone has tested a 1992 US ROM in a 1993 or 1994 LH box (or a 1993/1994 ROM in a 1992 LH box) to confirm this or not. I believe perhaps that GSXR has done either one or both of these swaps and found that there was an actual LOSS of horsepower. But he will have to detail that here.

Cheers,
Gerry

 

[need2speed]

The LH system *CAN* be "flashed". In fact, I have heard that the MB factory has provided several software updates (only available through dealers) over the years for the E500E LH system that have, in fact, are applied by mechanics through a "flash" mechanism to update the EEPROM with new software.

Cheers,
Gerry

Makes me wonder if outfits like Vath have done any programming for the M119 LH module to go with their tuning mods?

 

[gerryvz]

Good question. On my personal visit to them back in 2007, we only discussed mechanical mods. They do all of AMG's M117 and M119 engine work (i.e. if a customer goes to AMG for a 6.0 conversion, the engine gets shipped to Vaeth for the work). We didn't discuss software at all.

I will be visiting them again next summer (June 2010) as I'll be staying in the neighboring village, so could ask about this. They've been pretty unresponsive to email that I've sent them in the past.

Cheers,
Gerry

 

[gsxr]

1) Dean, the 1992 eBay chip installed the 1992 "012-" LH module does indeed remove the top speed limiter. It also removes, or significantly increases, the engine RPM limiter. I do not know if the Superchips chip does either.

2) Using a 1993-94 chip in a 1992 module results in a significant power loss. I have not tried the reverse, but there seems to be no point (i.e., there will be no peak power gain). If you want the power gain, install a 1992 module in your 1993-94 car.

3) The WOT enrichment is, AFAIK, dependent on the LH module itself, not the EPROM. In WOT enrichment mode, the system goes into open loop, sending a fixed amount of fuel, corresponding to approximately a 12.5:1 A/F ratio. The system cannot function in closed loop mode because the stock narrow-band O2 sensor only works at the emissions-friendly 14.7 ratio. However, remember that the power gain (or loss) is only 7-8hp between 14.7 and the ideal 12.5 ratios. You simply aren't going to find any big power gains by screwing with the mixture.

4) If you add headers, port the heads or manifolds, etc, etc... anything to drastically change the airflow... the LH module will adapt to the change in airflow automatically, over time. You can view (and reset) the adaptation values with a digital scanner, for lower- and middle-RPM-range operation. The system doesn't display WOT adaptation. With a heavily modified engine, it's likely that the 93-94 LH module is more desireable, since it will stay in closed loop, and keep providing fuel to maintain 14.7 ratio at WOT. The 1992 module can't do that, it still sends the same fixed amount, even if there's more airflow. Note that RENNtech's 6.0L M119.97x engines use 1993-94 modules with a custom EPROM.

5) I don't think we'll find any easy re-flashing, because someone would need to download the stock programming (and maybe the eBay, RENNtech, or Superchips programming) and compare them, then modify the program. The problem is, almost nobody knows how to do this for the LH systems used in our M119's. This is way, way beyond any DIY tweaking. And, I firmly believe that there would be minimal power gains anywhere in the powerband... and if there were, it could come at a significant penalty in fuel economy (or perhaps even damage the catalysts).

If you want serious power, you need larger displacement, forced induction, or NOS. Better yet, all three! Hmmm, a supercharged 6.2L with NOS... yummy!

 

[gerryvz]

Makes me wonder if outfits like Vath have done any programming for the M119 LH module to go with their tuning mods?

Here are some photos I took at Vaeth back in 2007:

http://web.mac.com/gerryvz/iWeb/GVZ%20E ... r%209.html

Cheers,
Gerry

 

[need2speed]

Dave, thanks for all that great info. I have the 92 LH module in the car right now but still have my 94 unit if needed. I'm collecting this info for the possibility of installing an STS remote turbo system this spring

Hey Gerry, if you happen to find a 6.0 crate motor laying around V?th, can you sneak it back in your luggage?

 

[szvook]

Some food for thought on eBay chips - http://www.evilution.co.uk/index.php?id=252

 

[DerFuror]

Seeking additional info on the Superchips product:
I opened up the LH module in order to verify the existence of an ECU performance chip. Seated inside is a Superchips performance chip.

I did some internet searching, and based on the similarities of the Company logo, this chip appears to be a product originally provided by http://www.superchips.co.uk/

The website is lacking any upfront detailed worthwhile information, except for the fact that the performance technology application has moved on since the 1990s...Superchips (the Company dealer) electronically installs a remapped program remotely through the car’s diagnostic port; there’s no replacement chip used these days. The ECU itself is physically untouched. .The speed limiter feature is removed upon request. Also, this form of performance upgrade is rather expensive (£399) and there is no North American dealer/distributor these days.

I’ve also read your previous threads attached to this topic.
• Is anybody currently sporting a Superchips performance chip in your 500e? Do you feel this chip was indeed an upgrade from stock?
• Is anyone able to share any Company product information regarding this chip?

I can’t yet prove if my particular Superchips chip includes the limiter removal feature (although I can’t imagine any red-blooded motorist buying the chip any other way!). I took the car up around the 150mph range on the road course at Watkins Glen, but can’t verify reaching or exceeding the factory limit…my eyes were glued to the road & my ears were blocking out my sisters screams of terror.

mbperformance offers the $60 chip on ebay and specifically states it removes the top speed limiter.
http://cgi.ebay.com/ebaymotors/1992-Mer ... 45e9af7d64

• Has anyone replaced a Superchips chip with the mbperformance chip?
• What type of “resetting” activities are required for a successful replacement? What type of equipment is needed?
Thank you for your consideration.

 

[ML-DBDriver]

Hi , i have the same Question can someone tell us?

mbperformance offers the $60 chip on ebay and specifically states it removes the top speed limiter.
• Has anyone replaced a Superchips chip with the mbperformance chip?
• What type of “resetting” activities are required for a successful replacement? What type of equipment is needed?

Sorry for my Englisch!
Thank you for your consideration.

 

[gsxr]

• Has anyone replaced a Superchips chip with the mbperformance chip?

I've never used Superchips, but the eBay chip does indeed remove the top-speed limiter.

• What type of “resetting” activities are required for a successful replacement? What type of equipment is needed?

After replacing the chip, drive the car normally for several days, as the LH module will perform self-adaptation automatically. This requires multiple cold starts over many days, and then driving under various conditions (high rpm, low rpm, varying loads, etc).

Don't expect any increase in peak power though.

 

[2phast]

The Ebay chip does remove the top speed limiter (verified). It also removes the cold start upshift delay (confirmed) and increased redline by 200rpm (confirmed).

I noticed no other changes and/or gains. This was in a 93 ECU. I now run a 92 S500 ECU without a performance chip.

Noticed on the dyno that the 1993 ECU forces the car to run lean. According to others, the 92 ecu richens the A/F ratio (as well as increasing max hp at WOT) but have not verifed this on the dyno yet.

 

[gsxr]

Rik, are you sure the eBay chip only increases the rev limiter 200rpm? I would have sworn I've seen it pass 6500/6600 once or twice (by accident!) and I always wondered what it was really set to, or if it was eliminated entirely. Stock is supposed to be 6350rpm. I'm a little nervous purposely trying to spin it to ~6750 to try and find the limiter.

BTW, the 92-up ECU sets the a/f ratio around 12.5:1 (approx) at WOT above 4000rpm (approx), based on wideband O2 data from the dyno. It's not clear if the eBay chip is richer or leaner, or the same, as the stock chip. Haven't tested that on the dyno - yet. Probably will eventually though.

 

[2phast]

Last time I was on the dyno I was hitting the rev limiter a little over the middle mark (between 6000 and 7000) so I figured it was around 200 rpm. It is entirely possible I could be off by 50 rpm or so as I was just going by where the needle was at when the limiter kicked in.

I can't seem to locate my 500e dyno charts and its very possible I tossed them in anger (since they were so poor). The dyno charts would tell me exactly when I was hitting the limiter, will check a few more places and post back.

 

[gsxr]

Last time I was on the dyno I was hitting the rev limiter a little over the middle mark (between 6000 and 7000) so I figured it was around 200 rpm. It is entirely possible I could be off by 50 rpm or so as I was just going by where the needle was at when the limiter kicked in.

I can't seem to locate my 500e dyno charts and its very possible I tossed them in anger (since they were so poor). The dyno charts would tell me exactly when I was hitting the limiter, will check a few more places and post back.

Ah, so you hit the limiter on the dyno, got it. If you can't find the charts, maybe sometime you could hit the dyno again... if it's a Dynojet, get the .drf files from their computer. You can play with these on your PC and generate any graphs you want, modify the scale, and even look at the raw data (which will show exact power numbers at a given RPM, along with drum speed - neat stuff). A wideband O2 reading helps as well to verify the A/F ratio. Next time I'll let mine spin up there at least once to see if I get the same thing.

BTW, if you weren't happy with the numbers, pop on the stock rear wheels for the dyno session. Larger aftermarket/AMG wheels can weigh quite a bit more than stock, and this will reduce the rwhp number a fair amount (possibly 5-10hp, depending on the weight). Your '93 with a '92 LH and stock rear wheels should put out at least 260rwhp, SAE corrected, maybe more like 270+. With the stock LH and 18" wheels it might be closer to 250rwhp.

FWIW, I now only do dyno runs with the stock wheels, to eliminate that variable.

 

[2phast]

Yes I plan to get in on one of the group dyno sessions soon and see what kind of A/F and numbers the 92 ECU will net.

Sold the OE 16" wheels, so I can't try that option.

I have played around with the dyno data for the CLK, I just didn't bother to get the raw files for the 500e.

 

[Christian_K]

Hi, i also have installed the chip already but so far not even completed the car...
Well if RPM Limiter is raised, does this only happen when in 4th gear in order to reach higher top speeds, or will this happen always on WOT or only on Kick-down?

 

[2phast]

Hi, i also have installed the chip already but so far not even completed the car...
Well if RPM Limiter is raised, does this only happen when in 4th gear in order to reach higher top speeds, or will this happen always on WOT or only on Kick-down?

My dyno runs and rev limiter testing was done in 3rd gear. Rev limiter should be the same through all gears.

 

[Christian_K]

Thats very interesting. So i assume you had your gearselector set on "3" instead of "D" and revved it until limiter?
What happens when you drive your car normally at WOT or Kickdown at the street? Does it rev also that high then?

 

[2phast]

Thats very interesting. So i assume you had your gearselector set on "3" instead of "D" and revved it until limiter?
What happens when you drive your car normally at WOT or Kickdown at the street? Does it rev also that high then?

Good question. In D, the car will shift before the rev limiter through all gears. To test this on the road, you would have to manually shift through each gear hitting the rev limiter before you upshift. Thats something I have not done.

 

[gsxr]

Just to clarify - the top speed limiter and rev limiter are two entirely different functions of the LH module.

 

[Christian_K]

Just to clarify - the top speed limiter and rev limiter are two entirely different functions of the LH module.

I know, i did read the introduction into service manual of the 500E carefully, they explained pretty well the two RPM limiters and the top speed limiter.
The Problem is, even when you would only remove top-speed limiter but let the persistent RPM limiter at 6000RPM in place, you won't make any significant speed gains over a governed car.
Because at 250kph you already have like 59xxRPM ....
Thats why the Chips either remove the 6000RPM one entirely or raise it to a few 100 RPMs higher together with the second RPM limiter, which is normally at 6300RPM and allowing only every xy seconds to be hit for a few seconds at stock.

Ohh by the way i just read in some gearbox manual that that little allen-screw in the valve-body which decides shift-points at WOT, is ALSO for Kickdown. That screw was adjusted in the factory as the car/gearbox got assembled.

So if you want the car at WOT/Kickdown to shift later near the raised RPM-Limiter when the car is chipped, you have to turn that screw like one full round left.
One has to try it, i will do it maybe in afew months when car is ready and so forth.

 

[zach1328]

I know this thread is kind of old but I though I'd just add my 2 cents.
I don't have any performance mods on my W124, but my friend has quite a few mods on his 03' Mustang GT. (I know its completely different from a W124, but regardless)

My friend has a Diablo-Sport Tune on his Mustang GT which is similar to a chip (I think you need the on-board computer for these to work?). But to his top end power and torque he got about 8 additional horsepower (RWHP), which isn't bad, but he got the biggest gains in the lower-middle range.

So, for example, his Mustang before the tune was 274 RWTQ @36xx revs.
After the tune his max RWTQ went up to 282.
But in the lower range 1-3k revs he got close to 10-12 additional RWTQ all the way through. Towards the upper range 4000-5800 revs it was an addition 5-7 RWTQ.

Regardless, if you're talking about an addition 5-12 RWTQ throughout the whole rev range I think that would be a decent increase in performance.
I'm sure the numbers won't be as great on a 500e, but even if you get 4-5 more RWTQ all the way from 1-6k revs I think it would be a nice mod.


If anyone was wondering, he has a Diablo tune, Full exhaust system, and a CF CAI and his HP and TQ are:
242 RWHP
282 RWTQ
A stock mustang GT is in the area of:
220-225 RWHP
260 RWTQ

 

[gerryvz]

If anyone was wondering, he has a Diablo tune, Full exhaust system, and a CF CAI and his HP and TQ are:
242 RWHP
282 RWTQ
A stock mustang GT is in the area of:
220-225 RWHP
260 RWTQ

I wonder ... what do the chicks think of this additional power and torque? Is he scoring more chicks since he added the Diablo-Sport unit? Is it as cost-effective an upgrade for getting the ladies as compared to say, having a couple of 12" subs in the back along with a few hundred watts of power driving them?

 

[gsxr]

Regardless, if you're talking about an addition 5-12 RWTQ throughout the whole rev range I think that would be a decent increase in performance. I'm sure the numbers won't be as great on a 500e, but even if you get 4-5 more RWTQ all the way from 1-6k revs I think it would be a nice mod.

The limiting factor is that the 500E engine management system has fixed ignition timing maps which the chip cannot adjust in any way. That, combined with a narrow-band O2 sensor, means that any chips for the 500E can't produce any significant power gains, and possible not any measurable power gains at all (this is still not conclusively proven one way or the other). But to date, nobody has been able to show dyno graphs or dragstrip time slips with before/after chip data indicating any kind of power gain or performance increase due to a different chip.

The Mustang GT mentioned above likely has a very different engine management system, most from mid-90's up (and most aftermarket) allow tuning both fuel delivery as well as timing, which is why they can make more power. The Bosch LH system (which was created in the late 80's) was advanced for its time, but simply is not tuner-friendly.

 

[zach1328]

Yeah, I don't have a chip on my W124 as i said, so I can't talk from experience. But just IMO no car come perfect from the factory, so there must be some way to net a few extra HP from a chip or tune.

Because runs on the DYNO can have different results every time there would be no way to notice a small gain in power, but I would assume its still there.
Now, if there were a gain all the way through the rev range it would be more noticeable, but I guess you can't compare modding a mustang to a 500e.

In my opinion, if you don't mind spending $200 on a chip (that may not even do anything), it is worth it. As long as it doesn't ruin the car, it can't hurt.

EDIT:
Gerry,
I do not wish to start an argument about subs (I know this is going to piss people off), but I believe subs are the biggest waste of money. I think that is possibly the worst way to spend money on a car.
Adding 100 pounds to the back of the car will just offset the cars balance. 100 pounds just slows your car down that much more as well as ruins the handling slightly. After you have them for a few weeks you don't really even notice them too much anymore.

Everyone has their own opinion on things, but Subs are one mod I will never bother spending the $500+ on.

 

[gsxr]

But just IMO no car come perfect from the factory, so there must be some way to net a few extra HP from a chip or tune.

The W124 didn't come perfect from the factory, but it also did not come with any way to easily increase power either. There's a big difference.

Because runs on the DYNO can have different results every time there would be no way to notice a small gain in power, but I would assume its still there.

If the gain is small enough that it doesn't show on the dyno graph or dragstrip, the gain is insignificant, and basically worthless. You can easily see a +5hp increase on the dyno.

In my opinion, if you don't mind spending $200 on a chip (that may not even do anything), it is worth it. As long as it doesn't ruin the car, it can't hurt.

The only advantage to the 400E/500E chip that I know of is removing the top-speed limiter. They may also eliminate the cold upshift delay but you can do that with a golf tee for cheap. I don't like that the chips seem to increase the rev limiter substantially, but that's a different discussion.

Everyone has their own opinion on things, but Subs are one mod I will never bother spending the $500+ on.

Well sure, for performance, any stereo equipment is just ballast. Rip it all out, including the head unit, speakers, and wiring. Some of us like to drive our cars on the street and listen to tunes, in which case a subwoofer can provide a major improvement in audio enjoyment. But yeah, it will cost you about five hundredths at the 'strip.

 

[gerryvz]

it will cost you about five hundredths at the 'strip.

Is that figure dyno and/or timeslip-tested, or is that the GSXR "butt dyno" talking out of its butt? ;-)

 

[gsxr]

Is that figure dyno and/or timeslip-tested, or is that the GSXR "butt dyno" talking out of its butt? ;-)

It's a rough estimate based on a typical sub box weighing 50 lbs or so; which generally translates into 0.05 sec (about same as removing the spare tire). Actual performance change will vary based on the size of your... sub box, moon's gravitational pull, sunspots, etc.

 

[gerryvz]

Did you factor in ambient temps, the barometer and humidity levels to that calculation, in addition to the factors you mentioned?

Because a 50-pound sub box at 80F and a 50-pound sub box at 50 or 60F will also noticeably affect the times.

 

[gsxr]

Good point. Need one of these to figure out how much to adjust your dial-in!

http://www.altronicsinc.com/pages/weathercenter.html

 

[Christian_K]

So, what are the updates in the W124 LH Chipping world?
I know that Dave now fiddels around with the Eproms. I know that the infamous Bernard has a "flasher" guy at hand, formerly worked for MB/AMG at the time the LH-Jettronic was "modern", who creates all the LH Chips for Bernard and his biiig displacement monster engines

 

[gsxr]

I haven't done much of anything with EPROMs... no access to the proprietary Bosch/MB hardware/software needed to reverse-engineer them. How much does Bernard charge for a 6.0L chip these days? The guy with the 400E 6.0L is trying to find one for sale.

 

[Taxi Driver]

""The guy with the 400E 6.0L is trying to find one for sale."" What guy is there one more? Roger

 

[gsxr]

""The guy with the 400E 6.0L is trying to find one for sale."" What guy is there one more? Roger

Yep, a guy in California bought a 400E with a body kit and a RENNtech badge, turns out it had a 6.0 under the hood but a 4.2L chip (no idea how that happened). He posted here on the forum about the car...

 

[Taxi Driver]

Oh sorry, him, yeah saw it's confirmed to be a 6liter now, finally,,Roger

 

[borring]

I installed a performance chip (ebay one) while my car was in the garage for the winter. I'm not absolutly sure if it's related, but if I start off with kick-down then the transmission stays in first gear even if I hit 7000 rpm. If not using kick down or if I use kick down while the car is in second-> gear then it work perfect.
(I also have 1st gear start - fgsswitch have tryed both with on and off which gave the same result)
Any clue?

 

[Jelmer]

7k? That's pretty high, I thought even the RPM limiter chips didn't push it to 6600rpm?

But yeah, there are chips available that mess with the RPM limit. I personally wouldn't mess around with it: a big fat 20 year old V8 running at 6300RPM is already scary high, IMHO.

 

[borring]

True, it's more like 6600...
I replaced the hole box with a spare from a 93 model to see if it was the chip, and it was not... with the 93' chip it still stays in 1st gear taking ~6200rpm.
So I believe it's the first gear switch (fgsswitch module) that is causing trouble which need some more investigation (might be a cable problem).

 

[Jelmer]

The full throttle kickdown rpm limit is 6350 rpm (or is it 6250? Both are mentioned on this very forum!) so your 6200rpm sounds OK. Or do you mean it stays at the red line but doesn't shift up?

 

[gsxr]

He means it doesn't upshift, it hangs in 1st gear at the rev limiter. As mentioned in his previous post, it's the electronic FGS that is causing the problem.

 

[maw1124]

I'm in a bit of a quandry regarding the current state of tune for need2speed. She has been de-catted, resonator deleted, K&N filters installed, and a '92 LH module. I've also installed a euro-spec non-cat EZL trim plug which changes the ignition curve to suit. The car runs well and idles smoothly.
:

Returning to this, my '92 car has the RennTech EPROM (fwiw), K&N filters and I went to a hi-flow exhaust. The euro spec non cat EZL trim plug is an interesting idea. How did it change the curve? Is it a worthwhile addition?

Thanks in advance.

maw

 

[400Eric]

It's been a while since I played with one of those. I didn't see any performance gain under the controled conditions of the dragstrip. But I still remain convinced that there is a gain to be had under certain conditions (like when the engine is hot). There has to be, right? I mean, why would MB even bother having a non-cat EZL trim plug if there wasn't something to be gained?

Regards,
Eric