No, I pre-load by letting the clutch up slightly for a split second, then I release quickly after it removes the drivetrain slack.

PS. Feeling the difference in top-end power from 5800' to 4800' last night really makes me eager to get some runs at sea level. Would be crazy to know what it could do...

 

easy 11.1sec at sea level that would be great for a dd evo on e-85

 

Yeah, one other thing I forgot about was my race suspension that is setup for road racing but not for drag at all. I have 0 experience with optimizing suspension for drag, so I should probably talk to some folks who know about that. I have 900lb springs in the rear, and my shocks are set very stiff all the time, so my car does not squat. It almost does not transfer weight front to rear at all, so that might be affecting my ability to hit nasty 60's. I did change my race alignment back to a much more normal street alignment (-1.5f/-1.0r), but maybe that has an effect, too. I should ask around. For now, I could at least set my shocks to minimum in the rear, but I would need to find out if that's proper.

11.1 at sea level would be unbelievable, and I do think it would be possible.

 

nice times warr.

 

11.1 never comes easy..... Make the trip and try it out warr.

 

i live 3300' above sea level and every car ive had drops 0.5sec the 1/4mile when i go to sea level so i dont see why he wouldnt hit 11.1 or maybe even less.

maybe your suspension is affecting you but not that much but its good to check on that also

 

also you said the ext temp was 97f so in a colder weather that car could be faster

 

Believe me, I know. There are no guarantees when bench racing like this. Of course, I have personal proof of how much I lost coming up here, but when you get to this level, times don't always do what you want them to. I would like to go to sea level, but there is nothing within a reasonable distance.

 

^Its always easier said than done.

I know on paper it should be easy, but we'll see whats what when he actually does it. If you watch the forums closely you'd know about people like most wanted and lucas english and how far they have gone trying to go low 11's-high tens(for lucas, 10.9).

For lucas it took E98 retarded amounts of boost, full built high comp alum. rod motor, elec water pump, etc etc etc

For Most wanted it took well over 30psi of boost, just about every bolt on and an EXTREMELY light car.

Using 4800' to sea level and NHRAs altitude correction factor, his MPH should be 120-121 at sea level, which is what I would expect, Knowing that I would that on a perfect run he could do 11.27-11.33, and like I said PERFECT RUN.

You don't just gain 50whp and go from 11.5>11.1 just like that.

 

I know you know Clay, I just want to give some rationale to everyone else that thinks this stuff is easy.

 

The NHRA correction factor gives only 120-121 if you use 118 as my current trap? 50whp should be another 4mph at least. I don't think I'd only gain .18-.24s with 4-5mph, but you never know until you do it. I'm in 4th at 7500rpm or so at the end of the 1/4, and if you look at my dynograph, I'm down about 80whp from peak by that point. At sea level, I wouldn't just gain more peak whp, but rather much larger gains than peak at 7k rpm and beyond. That's the biggest difference, but I won't claim a thing until I can prove it, in which case I know it would be more difficult than expected.

 

Congrats on another personal best, I'm jealous!

 

Very nice times! I see that you've upgraded your tranny and t-case; have you thought about upgrading your axles? Seems like that is your current weak point.

 

No, I haven't considered axles, since I'm making ~340whp now. People don't start breaking those until 550-600whp from what I've seen. I only did the t-case and trans due to the 6spd busting while road racing (4th gear) and the t-case beginning to whine after 25k miles of hard racing. I don't think I have near enough power to shear an axle.

 

Gotcha. Any plans for making more power? What size DRs are you running? 245s?