matt1289

I finaily got done with the heads and cam swap and I am very happy with the results. I was told I would make killer toque with this but wow it really is some killer torque.

I got the AFR 205cc heads(thunder racing) and Comp Cams XR275HR Cam (222/224 .566/.568 112 LSA). I have long tube headers and flowmaster cat-back. I had it tuned by DTP racing great shop, very friendly, awesome tuner.

ATLSS

iTrader: (7)

A4 or M6?

Stock rear or 12 bolt or 9 inch?

vettenuts

iTrader: (4)

Very nice, and what should be noted is that you made your peak hp under 6K RPM. What head gaskets and chamber are you running? I have AFR's en-route

TXZ28LS1

iTrader: (5)

those are good numbers with a cam that small!!! throw in a fast 90/90 and u can be at 450rwhp!!

ExceSSive

iTrader: (13)

I am not certain a FAST 90 would help him with that small cam...may help peak numbers but with my small TR224 cam and set of heads I gained like 10 rwhp peak and lost 12rwtq.

OneQuickCoupe

iTrader: (1)

You have to love a torque curve that is shaped like that. Nice street combo.

D.J.

ExceSSive

iTrader: (13)

What CC heads did you get? Did you get the 72cc, 66cc, or 62cc heads? I am just wondering what your dynamic compression is at with that little cam. Can you post your cam card specs? I was running ~11.3 SCR and ~8.67 DCR (93octane) and blew the #7 piston with 13.1:1 AFR. I was running 62cc AFRs with the TR224.5/224.3 .563/.563 113.5 LSA. Not trying to scare you...I did not get a dyno tune after the swap from one stage 2 head to the AFRs...could have been in my tune...too much timing...not enough fuel in the high RPMs...I just don't know. I am currently doing a good deal more reading in the HPTuners forum...don't want this to happen to my new set up.

SS DNA

iTrader: (7)

Man does are preatty good numbers from that combo!

you can squeeze even more out with some nice headers like American Racing ones with the velocity colectors and a good high flowing exhaust, then get a pulley, Electric water pump, maybe mill the heads more, maybe try a fast intake.

matt1289

Its an M6 with 66cc heads and I cant find the cam card.

Fast and better headers would be nice but the stock clutch isnt happy at all right now. Im ordering a tex in a few days.

ExceSSive

iTrader: (13)

Those are great numbers with that little cam...with the 66cc heads your SCR and DCR are probably fine. That cam is bigger than stock and 66cc is stock head chamber size=stock compression. You bump the compression a little and it will give a slight boost, I would just be conscious of your DCR with that small cam...read less overlap builds more DCR than bigger cams with more overlap. That seems to be why people bump compression with bigger cams to keep the DCR up...with yours it is probably just about right.

vettenuts

iTrader: (4)

I have been reading a lot lately on the cooling of #7, which apparently doesn't cool well either and some engine builders have stated they think that cooling is also a major contributor to the #7 problem. Apparently the stock water pump is also not very balanced left to right on its output either, which may also help explain why its #7. I am looking hard at aftermarket water pumps. Evans makes one and Edelbrock is introducing one as well, you might want to consider that in your new build.

ExceSSive

iTrader: (13)

Thanks...I may have to do that...never thought of the waterpump being inadequate.

Back on topic.

PewterScreaminMach

iTrader: (7)

Wow, that torque is killer. That thing's gonna take off like a bat out of hell from a dig. You're gonna need that new clutch.

ExTurbo

awesome numbers especially for a small cam and stock intake! gotto love the tq curves on the 205 heads...they always look great!

jmarsa

iTrader: (1)

You have one of the highest torque reading I've seen for even a medium cam LS1/6. Does that dyno compare to a dynojet?

--JMarsa

camarokid94

iTrader: (2)

congrats man i bet that thing feels great

Screamin_Z

iTrader: (2)

66cc heads? wow, those are very good numbers if I'm reading ur setup right. what's ur DCR? stock block? if u are truly running a stock block with 66cc heads, even if it's 40 cometics or something that's VERY good and kinda mind blowing. even if it's in a 05+ GTO.

Ryan02SS

iTrader: (3)

Very nice. This here is a prime example that shows the better your heads flow the less cam is needed to make big power.

04gtod

iTrader: (3)

Matt, over 400 ftlb torque from 3350-5600rpm.Awesome!!!! I have a 224/224/cam with ported ls6 heads and a ported Fast 90. Made 429/390. Picked up 24hp and 19 tq with the Fast. Don't let people tell you the Fast won't work with a small cam.

pdd

iTrader: (3)

wow-great results