The durability testing of the stock LS1 exhaust valves is complete! We went out to the Camaro/Firebird gathering and clicked off a 9.87 @ 138.9 first pass in our 97 C5 Corvette. This is with a 5.7 with pistons and rod bolts, through the mufflers, stock crank pulley, full length belt, stock GM graphite head gaskets and o-rings in the heads, 1.47 60' This is the Stg 1.5 5.3 heads right off the production line, nothing special done to these AT ALL, no special prep, no bull, this is still with the STOCK EXHAUST VALVES that our competitiors said would never hold up in a high performance engine, 11.0:1 compression, TNT 150 wet shot, 100 NOS dry shot, 28" hoosiers, 3.42 rear with the hardened shaft, vararam, LS6 intake, SY3500, Rossler trans, stock suspension except for poly bushings in the rear, racetronix pump, CCW wheels, 232/240 .595/.609 114 LSA (G5X2 clone) COMP Cam. To all those that helped, thank you all. To all those naysayers, kiss my bootie. Next step LS6 heads and a 9.50 goal, still stock displacement.

 

wow! thats awesome!

another 346 in the 9's!!!!!

 

Great to hear you have Vette running like that.

Fantastic ET!

Ron,

 

Very cool ..... Congrats

 

HELL YES!!!! Man, I knew I should have called in sick today and went to the track with you guys!

Did you guys end up doing anything to the car last night after I left? I know that ya'll were thinking about it, and I was gonna do it myself if ya'll didn't!

Congrats again guys, you totally deserve it!

Now, let's get cracking on my stuff!!

 

Great Job!!!! What springs did you use on those heads?

 

once again great job, guys I spoke with you all after the run thats smoking, I guess I know who will be working the heads on my new car.....

 

As far as the valve springs we were using a 978 comp spring @180 on the seat with 430+ over the nose with no issues ( oh and the stock lifters and rockers too).

PattyCake we didnt do a thing after you left cept .... came in this morning and bumped the shift points 200 and washed it dats about it...

 

Great numbers guys! Congrats! what does your fuel system on the car consist of?

 

Brent that is awesome Congrats on your success. You said the heads are o-ringed?? is the block as well?? and are you using studs?? It's cool to see the stock head gasket holding up

PS are you related to Gordon Lightfoot

Glenn

 

very cool numbers! good to see some new break throughs still. looks like GM got the supplier right on the exhaust valve atleast lol

 

Awesome.. I think I would need to change my 918's to some better springs to take that much nitrous.. If I may ask.. What did this C5 put down NA?

 

Very nice. Congrats. Guess those "budget" heads are working pretty good.


Bruce

 

Are you running stock rods? Congrats on the numbers

 

Yes, stock rods. We just have pistons and rod bolts as stated earlier.

 

nice numbers, thats pretty damn fast!

 

What are you spraying up too?

 

The heads are o-ringed, the block is not.

The car made right at 400rwhp unlocked.

Unbelievavle is correct, stock rods, stock crand, with arp rod and main bolts.

We have 2 stages, dry 100 out of the hole then, 150 wet on a timer. So 250 total.

 

I am sorry.. I meant to say what rpm are you spraying up too.. Your setup is awesome and I am sure many would like to duplicate it..

 

I think it's up to 6500 Vince, but Brent can correct me if I'm wrong. It's either 6500 or 6700 I thought.