PowerShift408

iTrader: (44)

What is the maximum horsepower that you are allowed to make?

01ssreda4

iTrader: (96)

Done easily......destroke

the22driver

345-350 depending on how heavy I keep the car. We dyno with a very specific set of rules (temp, number of pulls, hood closed..etc) we have a 9lb to 1hp limit.

the22driver

We do most of our passing under braking, in a horspower limited class there are very few acceleration passes.
Moving the powerband up is interesting, as long as it wasn't too spongy off of the bottom?

PowerShift408

iTrader: (44)

Can we please not have this conversation again. Why give up power for RPMs?

You may be able to get away with an LS6 cam.

Darkman

iTrader: (2)

I agree- an LS6 cam (204/218 .555/.551 117.5) with its high LSA is about right - it provides a torque peak just norh of 4,800 rpm; the HP peak is a little of 6,000 rpm; but importantly the HP level reamains relatively flat out to 7,000 rpm. I do think it would be nice to do that on EPS lobes for dirve train stability and reduced wear.

the22driver

That would be nice, a buddy has an LS6 cam laying around that he isn't using.

We had a guy in our class make around 375hp with a LS6 crate motor, he had an LS1 intake and longtubes. This would be too much for our class, he de-tuned it, but I would like to avoid that. Are the heads different as well? Maybe that is where he was getting all that power?

Thanks again for all the ideas, I am really incouraged

Darkman

iTrader: (2)

Yes, the LS6 heads (243 castings) flow more than LS1 heads (241 castings).

the22driver

There is a guy...I think his name is Danny Popp? He has a road race C5 vette that has some monster high revving LS based motor, that thing revs to something like 8 grand? Wow that would be awesome in a track/weekend car! I am thinking pro-touring early second gen...drool!

the22driver

Ok cool, I really like the idea of the production based cam, It should be usable over a bigger RPM range.
Some guys mentioned light valves, who makes them and what are they made of? Are they durable over continued use?

Darkman

iTrader: (2)

The 243 heads used on the LS6 come with hollow intake valves and sodium filled exhaust valves. 243 heads used on LS2s do not have these.

I do not know whether these can be used with your stock (241) heads. When you check with TSP about your motor's crank/rod setup you could ask them about light weight valve options, if any, for your existing heads.

Speed Freek

iTrader: (2)

I dont think anyone has mentioned balancing the rotating assembly for rpm increase on the bottom end, just throwing it out there..

BADD SS

iTrader: (4)

I have ferrea stainless 2.00 / 1.55 hollow, tuliped and undercut valves in mine, they are pretty damn light, dont remeber the #'s though..