Need some 1/4 mile insight.

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06-27-2009, 11:45 PM

#21

STANMAN

4th Gear Member

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Join Date: Jul 2005

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Quote:

Originally Posted by JDWalton

well everyone did kinda just skip over all my questions about how your suspension is set up.

Mine is at -2.

06-28-2009, 07:12 AM

#22

flounderlipps

2nd Gear Member

Join Date: Mar 2006

Location: Confusion

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Stanman
With a twinscrew, 4:10s and 18s I would launch @ no more than 3500
I have a Kenne Bell @ 13psi, DFX clutch, 3:73s, 305/35/18s and if I launch @ anything over 3500 I spin.
I think Stkjock can launch @ 4700 cause he has a centri blower and it makes touque @ a higher rpm than a twinscrew
But try it both ways and let us know what works for you

06-28-2009, 07:34 AM

#23

STANMAN

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Quote:

Originally Posted by flounderlipps

I tried 4K, it blew the tires off, 3500 and it was fine. 1.8 just seems high to me I guess.....

06-28-2009, 12:32 PM

#24

againstallodds1

Join Date: Sep 2006

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Ive seen flounderlipps pull mid 1.5s a few times almost going in the 10s with 18" MT radials. I would have to agree with what he said, cause I HAD the same setup as the OP.

06-28-2009, 02:57 PM

#25

stang910

2nd Gear Member

Join Date: Jun 2007

Location: NC

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I pulled a 1.67 60ft. with ultralites and the rest of the suspension being stock. Launched at 4000rpm and hooked hard with M/T ET's bias plys. Next time out I'm gonna be trying 5000rpm launches.

06-28-2009, 08:49 PM

#26

Stkjock

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Join Date: Jan 2007

Location: Long Island, NY

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Quote:

Originally Posted by STANMAN

I tried 4K, it blew the tires off, 3500 and it was fine. 1.8 just seems high to me I guess.....

it is IMHO, I gotta believe that the car has more in it. the burnout maybe the issue. any vids of your runs?

maybe you'll need to slip the clutch then from a higher RPM

06-28-2009, 10:19 PM

#27

Gene K

5th Gear Member

Join Date: Jun 2007

Location: Decatur AL USA

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Quote:

Originally Posted by JDWalton

Hes got adjustments for both, so if max traction is what he is going for, it makes no sense to say one is better then the other. How about, oh I dont know, do both? Get everything dialed in the way it should be (thats why you bought all those adjustable components,) then tray again

My point was you can make a car hook with a screwed up pinion angle but the instant center has to be right.