how far under in stock at Indy to qualify

[Jeff Stout]

Originally Posted by X-TECH MAN

I would have to say YES !
I have done the same type of work on bracket heads in the past without blasting the heads with media to hide the work. It has always been worth approx. 3 tenths or a little more. The MPH always went up also. Certain brands of heads have seen an improvement of 4 to 5 tenths by correcting the OEM C.C.'s with the work.. The bracket racers in Maryland near Budds Creek used to think I could walk on water...LOL. Some of their stuff was pretty much junk to start with though. Its been about 12 years since I did any of that stuff. I got tired of my dinner tasting like cast iron, retired and moved to Fla. .
I also know it for a fact several guys are still doing it. I used to touch up (freshen up) the valve jobs on their heads and have seen what was done. I will NOT mention names because I do not want to start a war. Its not fun anymore at all !

Thank you. I never knew it would have been as much as 4 to 5 tenths. I need to get out more often

[Jerry Terry]

90 +

[X-TECH MAN]

Originally Posted by Jeff Stout

Thank you. I never knew it would have been as much as 4 to 5 tenths. I need to get out more often

It depends on the make and model of the head. Chevy not so much. 383/440 heads a lot. Just filling the heat riser on the 383/440 MOPAR was worth about 24 HP on the dyno. Filling the dual heat risers helped a lot on those type of heads like Pontiac.. Some Fords are not so great either. I have not looked at the newer FI stuff. Remember this was with the older cast iron heads.

[Brett C]

Giving the weather we will have....it will be really close to -1. under to get in the Big Go this year.

[Frank Castros]

#128 @ .869 under.

[Lee Valentine]

.938

[TOSTO RACING]

.901

[Nick Heath]

Looks like temperatures will be in the low 60's for C1 on Thursday...

I say -0.944.

[Dan Fahey]

What happens when a Car exceeds 1.20 on a Cool Air Good DA Day?

Seems a lot of cars are very tight around 1 under.

D