Quote:
Originally Posted by Cavi Mike
Is a 12.5 really necessary? A buddy of mine builds 9 second fox bodies and he refuses to go any bigger than a 10. It's all in the suspension, he says, and I'm not one to question after witnessing an 8.9 run at NYIRP. Obviously you don't have a fox-body but once the front wheels are off the ground, how different is the suspension or the weight between the two?
|
There is a big weight differential, even after a massive diet my car weighs around 3190, I doubt if the Fox body is 2900, but you are right after 10.5 the extra tire might be hurting me. I wanted more tire for straighter launches with less drama, it does hurt me for some class racing though. The actual footprint is about 11.5 inches. These are DOT slicks, I might be better off to go with a full slick or a 27" tire since I'm only around 5900-6000 rpm at the traps, dunno but I got some sort of adjustments left to do.
Quote:
|
Originally Posted by crazybrew609
nice pass man.. i can't believe how hard it launches and it stays that straight and low.. are you limiting boost in first gear?.. do you have a modifyed rear suspension setup?
|
I don't limit boost, but my NOS is window switched for a second stage, after I get rolling. The rear has cheap Lakewood drag shocks but there is a roll control to limit rear torsional twist and I am playing with the air bag stagger and add spring rate to both sides. This trip I had stiffened up the front shocks one click from full soft to limit weight transfer to dial in a little spin. I am happy it is launching straight, getting the 60fts down are easier when the thing is predictable out of the hole and it has been straight from the first pass. Frank at F&R setup up the pinion angle, lower geometry and the anti-roll control stagger with a tape measure and some string old school style and he was dead on. With street tires when I blast from a roll in 3rd it handles pretty good after the initial waggle as the locker grabs the axles, 2nd is a waste, not able to hold at all on pavement but it was like that with 50 less HP and the IRS. All in all the live axle swap was easier than I expected so having a little more suspension tuning is no big deal.