Quote:
Originally Posted by ERA Chas
Bruce and Hales make good tire points. I still think 200 + for 9 seconds is the obvious ('Cause they did it) limit for Hoosiers or 'Cup tires. The Cup guys change them every 20 or so laps on the long tracks touching a 200 average.
Certainly the 'chute removes a lot of the heat soak into the tires from the brakes. Wonder if nitrogen helps race tires run cooler??
But I still wanna know how this produces 5+ HP/CI. A ProStock 500 inch engine makes 3.5HP/CI -but without boost. So how much boost? How do you keep the heads on? How big intercoolers? Spray??
Sorry-I love the tech and can't get it. 
Bruce, will your NA GT touch 200? And what came with it-Goodyear F-1's? |
The guy that built their engine has made 1900 with a 4.6 drag engine so yes it is possible. I don't know the particulars of this build but John Mihovetz is a genius with Mod engines, his blown mustang does 241 in a 1/4 mile. He uses lots of boost (60 psi) and compression and pulls spark to make it work or so I am told.
Chas all GT's are blown stock, some have custom turbo's only a few race cars were naturally aspirated due to rules. My car has a 4.0 liter Whipple running 26.5 lb of boost. I am into road racing so I have lots of drag inducing features that hurt top end but help down force. My car reached 190 at Fontana on the front straight starting at about 60 mph coming off the road course and would have gone faster had I not chickened out going into turn 1. To get really big speed numbers in the standing mile you have to be over 1000 rwhp, my car is only 862 rwhp. I am down on power but have no turbo lag which is much better on a road course if you are old and slow like me. I think I might be able to hit 200 in the standing mile but might have to pull the wing to do it.
My car came with GoodYear F1's but they are junk in my opinion, I first replaced them with Michelin PS2's for street use but love my Hoosiers for the track, they stick like nothing else. The Hoosiers are really good in mile events because they handle the acceleration well and can tolerate high speeds too.