I have some A.R.E. Stage II LS6 heads on my 01 zo6. The work was done 11/01. They have 2.08 1.60 valves, and flow...

200 155.9 136
300 212.3 171.9
350 235.5 186.3
400 258.8 193.4
450 280.3 202.4
500 293.6 213.2
550 301.9 218.5
600 311.8 227.4

I am running a comp cam XE-R 232/236 .595/.601 @ 114 lsa. It has a PP TB, port matched ls6 intake, stock pulley, stock airbridge, TPIS through cats, GHL exhaust and Donaldson Blackwing.

The car dyno'd 420.5/389 SAE yesterday.

The numbers from the heads seem to flow very well, but I'm not sure they huge intake valve is doing much for the heads in terms of velocity, which is very important. Would it be worth switching to a 'new' patriot ls6 head (or really whoever), ie could I pick up 20-30 hp more? To me, a heads/cam ls6 should be doing higher than 420.

 

dude, stay with these heads.IMO if you switch to PP ls6, you might lose more power.

 

monkeyboy, thanks for the reply. Why do you say this?

Perhaps a cam change is in order? Not that 420 is bad, but its not stellar either.

 

I would have to agree. If you have REAL LS6 heads why get rid of them for an LS6 STYLE head. You could possibly get the 59cc chamber design and bump your compression but the flow numbers on your heads are to good to lose. Why not ditch the CATS and/or get a cutout followed by an ASP pulley. Ditching restrictive cats and a pulley ought to be good for some missing HP.

Post the graph so other people can pick apart where you might be lacking.

 

i dont think that the PP heads flow better than the heads you have now. others may disagree. i do think that 2.08 valve is killing you on that 346 though. a cam change will definately bump up that hp, not that the 224 cam is bad cam. try something in the 230ish range. 420 is nothing to sneeze at either.

 

He is. look at 1st post

 

You should be pushing much better numbers, depending on you intake/exaust set-up. The flow numbers they give you are one thing, what they really flow is another. I think the 2.08 valves are actually what is hurting you. 2.05 has seemed to be the max you would want to go on a stock bore. Whetehr the Patriot heads would help any is a toss up. That would be a kinda expensive "maybe".

 

Well, I'm tempted to sell these heads, as I'm sure they'd make awesome heads for a big bore motor, and get some Cartek, LGM, PP, or ARE heads.

I have a dyno run downloaded (can view with a dyno viewer), can anyone host it?

 

oh sheeat, my bad . keep the heads

 

Buy other power adders like an Electric water pump and LG headers before getting rid of real LS6 heads.

 

yeah, i agree with blk-2000, spend the money elsewhere.

 

I have TPIS headers now. Do the LG headers make that much more power?

FWIW, I was told by Wade at ARE that they have a new cnc program that he is getting MORE power out of 5.3 heads than ls6 heads now. They got 431 sae through a 3300 stall, 4.10 12 bolt automatic. The car ran 10.7 on motor alone.

 

Lou makes a lot of claims about his headers and I for one believe him. They are true equal length at about 32" I think.
If ARE says they have 5.3 that make more power I would ask them about a "DEEP" discount if you turned in your heads, otherwise stay away. I still say giving up a real set of LS6 heads is a NO NO. I am sure that over sized valves would hurt your performance a little but I would be looking elsewhere for power adders before doing a head swap.

 

Well from what i can see (and i am no expert by any means) get some long tubes that should help alot

 

he already has them

 

Need to ditch the cats that is what is holding you back. I would grab a asp pully y you are at it. Should be a quick 20rwhp.

 

Hi Greg, it is no secret that the older big valve head packages (2.08) were what we were doing and "OK" at the time. They do work better on a big bore engine and respect that you have a set on a stock bore .
Our new heads with smaller valves (2.02-2.04) make more HP and TRQ than any of the older packages like the one you have. We stick behind our products and will work something out with you that works for everyone.

You might want to e-mail me privately as this board may not be happy to see me conducting bus. here!

 

Nick,

That's got to be the funniest thing I've read in a long time on this board. Stand behind stuff? What a joke.

ARE was banned as a sponsor for not paying dues and lousy customer service. Buyer be ware.

If your a long distance customer read up on the ARE crowd and their well know horrific customer service. ARE has a well earn reputation for screwing long distance customers well before Nick left.

Greg,

I'd keep the real LS6 heads over the PP LS6 style heads.