Good work Christian...I have always suspected the OEM fuel injectors were on the small side.
I went with Tech Edge WBO2; have you chosen yet?
Jim
No, its different. I run a WOT-Enrichment enabled ECU, that goes into openloop at a certain load. This open-loop has a own fuel map, that need to be adjusted as the car sees
a) more air because of porting/portmatching and increased cam lift+duration and
b) better gas-exchange because of much biggger exhaust ports, less restriction on the exhaust side, 100cell metal cats
I read that Dave once said the self-adaption values would have an influence on the WOT/open-loop map(s) for the early-style wot-enrichment enabled ECUs. Bernard says no, it has to be adjusted on the Dyno.
Sounds awesome! The cost is €747 including VAT, plus shipping, correct? Do they have any cores available or do you have to send over a set? It would cost around $150-$200 USD to ship over a set of core camshafts. I wonder what the cost is for the special springs (to replace the single conical springs on 1993-1995 engines). I'd still like to try a set of these cams.
Any chance you can get it on a dyno?
Dyno maybe next year. I only have 3 days left of registration for this year, currently refinishing front swaybar today so i dont want to drive until its in again. Also next Dyno is at Dbilas from my Location and i would need an appointment for that.
Yes 747€ incl. VAT, for Outside of Europe people i believe final price is MINUS the VAT of 19%. There are NO cam blanks available on the world market anywhere since almost a decade for the M119. Hagmann and Bernard confirmend me this. The Original Blanks were made by MAHLE, they can do new ones but i believe its at least 500 pieces/cam-type so 2000 cam blanks LOL! So you have to send-in your old cams or buy new ones as one M119 cam is reduced this year to IIRC 120€/cam NEW from the dealer.
Other Valve-Springs were like approx 350€ in 2010, so maybe 450€ this year? You have to ask them. Or get used M119.970/972/974 early series heads from the scrap yard/ebay? And use the early style springs?
As to my knowledge they require your set of cams to do it. Had to send them my cams for the m117 from Kuwait in order to get them done...
Yes right, as neither for the M117 nor for the M119 blanks are available unfortuanately. If they were, it were not called "regrinds" but entirely new grind cams
I was looking hard at WBO2 sensors.
Get one which you can put in place of the stock and it has "narrow band output". Or just add a bung.
He's increased volumetric efficency. Please please please- if you want to really help the group. Whom ever re-programs your chip. Get the Hexidecimal code before and after. I'm assuming you are doing only WOT? I've got problems but in the USA- nobody can re-program my chip.
Michael
Yes i had a topic about AFR monitoring here from 2,3 months ago. I think i will go with AEM wideband failsafe.
I have no code reader nor a software for that. We will see what next year brings.
I'm also curious which cams have to be sent in. The early cams have more lift.
Early .974 cams (1992, with double valve springs): 9.50mm intake lift, 8.75mm exhaust lift, 37.10mm base circle
Late .974 cams (1993-up, with single valve springs): 8.90mm intake lift, 8.40mm exhaust lift, 37.10mm base circle
Can Dblias regrind either type to their specs? Their website doesn't say anything about this.
They can do both, but for the later ones you need shims under the lifters, as for my Profile they need to remove more than 1mm of the base circle. Shims which i think is another 10bucks/piece!
Michael, if Christian is seeing noticeable power gains even with the stock chip, that is great news. Reprogramming the chip might add a bit more power but if the majority of the gain is available even without reprogramming, I could live with that. If he can provide the custom EPROM binary file for max power, that would be fantastic.
We can do some kind of "group buy", I make a dyno tune for my setup (cam regrind, ported/portmatched heads) and you fund me with it and i will send the file/eeprom later on. ;-)
Dave,
Yea it's great he's seeing a difference, but if you remember Hegman showed with just cams or with cams and chip. Seemed like it was ~25 hp without the chip and another 50% with the chip. From what I can gleam into the bosch Hexidecimal programing, the curve is scaled based on averaging. It cannot change the shape of the fueling map. So unless he puts down 100+ miles in a range where it is running lean, there will be more power to be had.
Think of it as you are running 2% lean, so the computer adjusts the fuel curve by 1.02*value. Acceleration time is a small percentage for most of our miles, so it going to be @ 70 mph or what ever.
Michael
Hagmann claimed with this Profile but with more exhaust lift/less duration (10.4mm, compared to 9.85mm of my exhaust profile, but "only" 252° exhaust, while i have 260° exhaust) 30HP/NM, but wirhout tune only 15HP/NM is measurable. With Ported/Portmatched heads they said to me dyno verified 370HP (DIN). Thats ~50HP/Torque plus.
I was driving with these cams and the bad lifters to the this years 500E meet and i put the plug to "NR7" (maximum enrichment everywhere) and my self-adaption values after ~400km showed me like "0.98**" for upper and lower part-load and "-0.2KG/H" for idle.
I now reset it again and put it back to Nr1 and noticed with the new lifters that i goes better. So i drive Monday another 100km and then i will check self-adaption values again.
No. The difference in lift is small enough that I think it will work ok (no spring bind issues), but I also suspect the stock profiles are so mild, there would be very little gain - if any. Dbilas is adding a fair amount of lift and also increasing duration, AFAICT.
A few years ago, I picked up a spare set of cams to send off for regrinding, but I forget if they are early or late. It's been frustrating that there is so little information available about this modification, i.e. which springs can be used, are 'buttons' required for the lifters, if custom springs are needed what is the cost/availability, etc. Most of my engines are the late style with single conical springs, not the same was Christians. I want to swap camshafts only, not pull cylinder heads, recut valve seats, and dink with stem height issues.
Buttons for the lifters? You mean the shims to put under it? Not needed if not more than 1mm is removed from the base circle.
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