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* Let's have a test and tune day in So. Cal.
- Thread starter 400Eric
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- drag racing nitrous
Just curious, what does the NOS expert say on this topic? I thought the 10-15 second recommended limit was to reduce stress on the motor and/or keep cylinder pressure to safe levels. If it's just solenoids, shoot, that's no big deal. I'd want to run either a fuel pressure gauge and/or an wideband A/F gauge for that kind of use so you can shut off the juice if anything starts going out of spec.
Eric, if you're on a budget, and getting V-rated tires will be cheaper, don't break the bank for anything more. The 500's can't get to 160, and the 400 won't either. As I mentioned before, it's a lack of available distance.
With 1.5 miles and a healthy 6.0 motor we might pass 160, but even then I'd be surprised if 170 was possible (with correct gearing). I've been proved wrong before of course, but I have a smidge of experience (and test data) in this area, and I have a pretty good idea of what's realistic. Don't forget the elevation won't help (2700'). With 2-3 miles available, then we could reach vMax.
Again, I think people are forgetting, this is not a top speed test... it's a fixed distance test. You don't get to keep going until the tach stops climbing. You have to lift at 1.0 miles.
Gerry, I think the corollary to that question is, could he get back on the juice a second time, say for another 10-15 seconds starting at ~130mph? This would allow a coool-down period of 10+ seconds. I wasn't sure if the more serious issue was use of NOS when the RPM's are pretty much static at 4500-5500rpm (i.e., sustained 350-375hp output).
The issue is that the solenoids get VERY hot under activation. It is possible that extended use could MELT the solenoid in the open position. At that point, no amount of failsafe sensors or switches are going to shut off flow. So if they melt open, as soon as you let off the gas.....POW! I suppose I could press the button that closes the Electronic Bottle Valve before letting off the throttle, but there would still be pressure in the line (albeit very little) and that would require me to stay on the gas past the 1.0 mark.
Hmmm. I haven't researched this at all, but it would seem that upgrading the solenoids to something a bit more industrial-strength would be a rather easy solution (but, perhaps not cheap). If you discuss this with Steve, please let us know what he says!
Oh and PS Eric, I know you're kidding, but that doesn't make it any less weird! I've gotten used to it by now though. You're always noticing the change in the angle of my dangle when I see a certain car or talk about certain parts.
I just said your tires were nice and they looked new. Hardly wood-worthy though. Now, all this talk of the Mojave Mile on the other hand, SCHHHWWWINNNGGG!!!!
I just said your tires were nice and they looked new. Hardly wood-worthy though. Now, all this talk of the Mojave Mile on the other hand, SCHHHWWWINNNGGG!!!!
Thanks for sharing.
Are you going racing this Saturday? I need to get those Harbor Freight coupons back before they expire.
Maybe the gauges and tools too? (But only if you are done with them.)
Casey's probably serious game for this Mojave business, ya think?
Uncle Gerry, please re-post those pictures of you with the garden hose!
Regards, Eric
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I got a helmet! Therefore, Iwant to take part in the mojave mile next year!
http://explodingdog.com/january2/wereallgonnadie.html
http://explodingdog.com/january2/wereallgonnadie.html
Why only as a spectator?
(
Ya, das ist gut! So we have at least 4 SoCal Benzes so far and a potential appearance from Boise, ID (albeit almost 750 miles away and we hope can make the pilgrimage). 5 more and we get the 10% off.
I was game till you reminded me it was Sunday, not Saturday. Sunday is when the heat comes back! Now I'm bummed! Sunday is gonna be back in the 90s! (93ish) I dunno Stevo Devo.....
Another potentially bigger problem is the wifey is definitely gonna have issues with me racing on Sunday. Any Sunday. Sundays are for family, church, replenishing provisions, all that stuff, not racing. Maybe if I had known farther ahead of time (I DID know but I forgot, my fault) I maybe could have gotten a reprieve, but to spring it on her this late in the game..... I tell you what, I'll make you a deal..... you convince the wife to let me go racing and I'll go. Do you want our land line number? If there's anybody up to the job, it's you!
Regards, Eric
Another potentially bigger problem is the wifey is definitely gonna have issues with me racing on Sunday. Any Sunday. Sundays are for family, church, replenishing provisions, all that stuff, not racing. Maybe if I had known farther ahead of time (I DID know but I forgot, my fault) I maybe could have gotten a reprieve, but to spring it on her this late in the game..... I tell you what, I'll make you a deal..... you convince the wife to let me go racing and I'll go. Do you want our land line number? If there's anybody up to the job, it's you!
Regards, Eric
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Oh hell no! I've been down that path before and have stayed away from other peeps family matters, especially when it came to letting the guys go out on the weekends. If anything, I rather save the shpeel for the Mojave trip, where Sunday can play a factor. So keep that in mind, since you are talking about going on both days and get your family prepared ahead of the event dates for next year.
Plus, since the weather is gonna be hot again, I can forgo this Sunday and target October 15th for the next race and maybe more peeps will attend then. So I'm out for this weekend.
True dat.
...
So should we approach it with the 1/4 mile tactic, by trying to get up to speed as fast as possible out of gate?
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Yes and no. You want to get up to speed as fast as possible, so yes you should floor it at launch, and leave the throttle pinned (WOT, kickdown switch engaged behind the gas pedal) all the way to the finish line.
However, don't worry about a perfect launch, or ASR engagement at launch. This will slow your ET down a bit, however it will have zero effect on trap speed - same as at the dragstrip. Leave the drag radials at home, lol...
Got it, and no radials for me - I just don't have a place to store any additional wheels and tires anyway. I would if I had room and would swap them out for 1/4 mile days. My Conti DW's will just be over a year old in time for the Spring event and since they have a higher treadwear, they are not worn as much as Goodyear GDS3's were with the same mileage.
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Btw, you engage the kickdown switch in your 1/4 mile races, or there isn't enough time? I haven't tried it at the 1/4 races, I think it slows the ET down.
Always, every time. When I hit the gas, it's 100% down, kickdown triggered, all the way through the finish line. Anything less and you're likely losing some performance. If you have traction issues, then you'll need to fix the traction issues. Best ET comes with zero wheelspin. I had to get LSD for both my cars to fully eliminate the occasional wheelspin.
Hmm, something to think about. I have yet to use the kickdown (just FGS) from the start as I though it takes away a few tenths of a second for the kickdown to engage. I just floor it and let the gears cycle through automatically.
That's why I built 2.65 LSD's for both my 500's. Wheelspin is pretty much eliminated unless track conditions are exceptionally poor. But, as Gerry would say, chicks just don't dig 2.24's...
The kickdown just keeps it in each gear to redline - doesn't matter if it takes a bit to engage, your FGS valvebody is already putting the car in 1st from a stop, and as long as you engage kickdown before the upshift it won't affect the shifts. However, if you're not at 100% throttle immediately, you may be losing a bit of time. There's no need to gradually apply throttle, unless you have traction issues, but the proper fix isn't to ease into the gas - fix the traction problems at the rear end (drop tire pressure, install LSD, mount drag radials, or all of the above).
You really have to be above a 3.00 on the rear-end to get chicks. You can thank the American muscle-car folks for that. Why do you see all the dudes with Camaros, Chevelles, GTOs, Mustangs, Torinos, and AMXs crowded with women? There's literally no other explanation.
Oh yeah, same with the AMG 126s. The SECs and SELs that had 3.XX rear-ends done scored all the chicks back in the '80s, and even today !
This is the reason for the confusion about the dates. I copy/pasted the above directly from that lame track's lame site. You can clearly see that it says Sept 17 not Sept 18 yet the flier they handed out said Sept 18 not Sept 17! Which one were we supposed to believe? I hope we didn't just mess-up! It was 93 there Sunday http://www.dragtimes.com/da-density...&day=18&year=2011&getweather=Get+Weather+Data, it was only 78 there on Saturday! http://www.dragtimes.com/da-density...&day=17&year=2011&getweather=Get+Weather+Data
Regards, Eric
Well, I haven't heard any wild tales of nights out or folks swinging from the chandeliers from any 036/2.82 guys here, so kind of proves my point, eh? I think GSXR comes close with his LSDs ... but he doesn't strike me as that kind of guy. Plus, chicks in Idaho tend to be bundled up for 10-11 months out of the year.
She's a 126 babe, Eric! Out of your league until/unless you get yourself into a 126 coupe or sedan !!
Obviously it wasn't length of the antenna that attracted her to the car.
True story: I was asked a few years ago if it's true what they say about Asian women being so tight. I said: "Son, to me they are ALL tight, not just the Asians" (Not a true statement but it is a true story!)
Regards, Eric
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Hey 400ERIC,
In this post it's stated that the M119 is sensitive to ambient temps too.... don't tell GSXR though...
http://www.peachparts.com/shopforum/243457-post1.html
http://www.peachparts.com/shopforum/243677-post6.html
Cheers,
Gerry
In this post it's stated that the M119 is sensitive to ambient temps too.... don't tell GSXR though...
http://www.peachparts.com/shopforum/243457-post1.html
http://www.peachparts.com/shopforum/243677-post6.html
Cheers,
Gerry
Yeah, I'll take one guy's anecdotal claim over my multiple hundreds of documented dragstrip runs noting engine temp, ambient temp, barometric pressure, humidity, wind speed, etc. I'm sure he's right and I'm wrong.
Also, the claim of a 100°F drop in under-hood temps by coating manifolds is so ludicrous it almost defies belief. Positively ridiculous. I'm all for thermal coating, but let's be realistic with the temp claims, mmm-kay?
Also, the claim of a 100°F drop in under-hood temps by coating manifolds is so ludicrous it almost defies belief. Positively ridiculous. I'm all for thermal coating, but let's be realistic with the temp claims, mmm-kay?
I wasn't commenting on his manifold coating claim, as I haven't experienced that (yet?) with my SEC. In fact to be honest it still gets hot under my SEC's hood. I was expecting it to be so frosty cold under there after my manifold coating that I could chill beer, but alas it wasn't to be.
But the ambient temp claim....it was interesting to know that Eric and me weren't the only ones who have seen that.
But the ambient temp claim....it was interesting to know that Eric and me weren't the only ones who have seen that.
There's very little humidity in Portland (where I experienced my ambient temp M119 sensitivity in dozens upon dozens of documented dragstrip runs at temperatures ranging from the 80sF to 33-34F, noting the ambient temp, barometric pressure, wind speed, elevation, wind-chill factor, opponent's body temp, etc.) on non-rainy days.
Far be it from me to be the one to briefly bring this thread back on topic but there is a discrepancy in the dates for our drag racing. The flier that they handed out to us says the next date is 10/08 while their web site says it's 10/15. Remember, their flier was right about the last date saying it was 09/18 while the site said 09/17. I've called them twice, still waiting for a return call. What a poorly run track! In the meantime, you all keep both dates open!
Regards, Eric
Regards, Eric
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Uncle Gerry, Dave, here is a must read:
http://www.hotrod.com/techarticles/engine/hrdp_0406_density_altitude_tuning/viewall.html
Regards, Eric
http://www.hotrod.com/techarticles/engine/hrdp_0406_density_altitude_tuning/viewall.html
Regards, Eric
"...Patrick Hale points out that engines also don't respond to temperature changes as strongly as the air-density equation would predict, instead varying with the inverse of the square root of absolute temperature."
Not to mention that the '92 LH modules run open loop at WOT and don't adjust for anything. As soon as you figure out how to re-jet the M119 at the track, lemme know.
Not to mention that the '92 LH modules run open loop at WOT and don't adjust for anything. As soon as you figure out how to re-jet the M119 at the track, lemme know.
