heres is what im gonna have...

lt1 shortblock
lt4 heads ported bigger valves
lt4 hotcam 1.6 rockers
lt4 intake for use with holley carburetor
750 DP
1 5/8 headers

WC t-5 rebuilt, CF DF clutch..3.42 gears, street tires

SFC's control arms and an aftermarket torque arm

i was thinkin a high 11 with traction

 

I would think 11's would be pushing it. I've got a Hotcammed LT4 right now with 3.42 gears and a T-5, Hotchkis lowering springs with LCA brackets, and street tires. So far the best I've run is a 13.1 at 109. I would say mid 12's would be a more realistic guess.

 

If I recall correctly there were a few threads at corvetteforum over the years which had dynos on hotcammed LT4s which were around 340-350rwhp with full exhaust and stuff if I'm not mistaken (but stock heads). That is with the actual LT4 intake and fuel injection. I don't think that would be worth 11s on street tires myself.

But when you figure in your head porting which sounds fairly significant I'm thinking you will get on up closer to the 375-400 rwhp range and your high 11. How well does the carbed LT4 intake flow though, I've never heard anything about it? The LT4 injected intake is supposed to be pretty mean, so I'm a little up in the air on how your intake will affect this equation...

Just my guestimating, could be totally off obviously...

 

ohh yea htese heads are hogged out...about the ONLY sbc head they wont outflow is canfield..(i knew they were good but not that good).....

heres what the owner has to say about them

GM LT4 Reverse Cooled ALuminum Cylinder Heads for 93-97 LT1 style engines found in Camaros, Firebirds, Trans Ams, and Corvettes. They are GM casting number 12555690. These were the optional heads that could be ordered on the 1996 Corvettes as a kit. These heads were GM blemishes that I aquired and totally rebuilt. They have never been run on an engine. They are basically brand new heads that had some scratches and a few nicks on them. One head had a pinhole in it that was repaired with an aluminum tig weld by the exhaust ports on the exterior of the head. Mechanically they are perfect. My modifications include: Manley Performance Stainless Steel 2.02/1.60 valves, Manley Performance Steel Retainers, K-Line Bronze Guide Liners, Positive Valve Stem Seals, and Pioneer Performance 1.250 valve springs. They have had a light cut on the head mating surface. They have 54cc combustion chambers. The spring pressure is 120 lbs on seat and 300 lbs @ .500 lift. The springs are good up to .540 lift. They are machined for either screw in studs with a self aligning rocker or screw in studs and guideplates with non-self aligning rockers


as for the intake i dont have any flow data but im sure itll flow pretty damn good if it only fits one head and theres only 1 carbed intake for that head

texaslt1...yea that what i was basically shooting at but i was figuring on perfect condtions ya know...you have the mph for a 12.2-12.3...whats your 60ft?

 

So far the best 60' I've been able to manage was a 2.00, and that was on my best run of 13.1. Right now the main thing holding me back is tires, I'm still running street tires because I cant afford to get a set of rims and slicks, therefore I'm having to launch at lower rpm's to keep from roasting the tires. The last time I went to the track, just for the hell of it on my last run I tried a 4000 rpm launch, yeah my 60' was about 2.4 because I spun all the way through 1st.