I know, I know. Another cam question. But I'v read through a lot of posts on different boards about these cams, and have not seen the answer to my question.

Stock '01 LS1 bottom end. Mostly stock 241 heads. A track only engine in a very light car.

When using the Howards version of the ASA cam, or the GM ASA cam, do you need to fly cut the pistons?

If not, how much can you shave the heads before PTVC becomes a problem with these cams?

 

Funny you mention Howards Cams, as I just realized the other day that's what I have. The specs on mine are pretty big, and i've heard nothing but great things about their cams. As for question i'm sorry but i'm not sure

 

I have Howards ASA cam with PRC stage 1 heads milled .030 with .045 cometic head gaskets. Texas motor speed said I could go with .035.

When I measured I was .083 Exhaust and .121 Intake PTV.

I know the 241 and 243 are different, just thought I would give my two cents with the cam.

I would still check, every engine is a little different.

1999 LS1

 

Correct me if I am wrong, but since the ASA cam is a GMPP product, it was meant to be swapped into Gen III/IV engines with minimal labor (besides the necessary LS6 valve springs). Since it is just a .525" "baby" cam, I think you'll be okay as long as your heads aren't milled a bunch.

 

That is my understanding to. But, I'v been wrong before.

 

No flycut needed, not sure how much you can mill of the top of my head.

 

The lift won't determine the need to fly cut, the duration will. However, I don't recall anyone stating it was required in the past. Why not just measure, it doesn't take long and will let you know exactly where you stand. Use the dial indicator method.

 

Hey whats up buddy I wanted to ask you, I have the same howards asa cam and looking for some ls6 heads, whats the difference between the stage 1 and stage 2.5 ls6 heads prc from texas speed?

 

The difference is valve size. Stage 1 uses stock 2.00 intake/1.55 exhaust valves while Stage 2.5 uses 2.02 intake/1.575 exhaust valves. That's it!

 

Ok how about the port, are both ported the same? Or any specifications?

 

Go to TS&P's website; all indications show porting is the same, as there is very little flow difference between stages. On a 5.3 the valves are shrouded so much on the 2.5 it isn't even worth the difference. An LS1 might show more difference.
Call TS&P, they'll set you down the right path.

 

Ok yeah I will give them a call im kinda new in this, do you recommend me the stage 1 ls6 heads for my setup? To get it milled .030 whats the CC on them?

 

TS&P would be the ones to answer that. Stage I is probably best bang-for-the-buck, though.

 

How much rwhp did u get with using your 1.7 rockers

 

So when you purchase the stage 1 ls6 heads do they send you the 243s or the 799 or do you choose? Also do they come stamp in the heads?

 

Both are the same head, the 799 came out later and is used on trucks on the 5.3L. You could get a pair of either type. But to be sure, call TS&P.

 

Who did you talked to in texas speed, they told me with the prc stage 1 ls6 heads I should mill them .020 to be safe using the howarda asa cam, you milled them .030

 

Just thought I'd throw this out there since Howard's Cams is local (1.25 hours away) to me; Competition Products purchased them quite a number of years ago and began marketing a bunch of dinosaur profiles that were old *** 60s-70s type crap on old machines. I've seen the re-tooling process they've gone through where these newer profiles are all CNC "cut". It's great quality and I use ALOT of their Gen I SBC flat tappet stuff for circle track builds. NEVER had one fail during break in and they always make decent power. Plenty of their sales staff members are racers (both drag and CT) and do builds on the side so there is endless amounts of real world feed back.
Several TECH members swear by their ASA and Hot Cam profiles for the Gen III architecture

 

How much rwhp did u get with the howards asa cam and your prc stage 1 heads setup?

 

So .030 mill is good using the prc stage 1 ls6 heads with the Howard's ASA cam? About how much rwhp did your setup put down?