corvette racing

I put these heads on a LS1 motor with a 220/224 581 114 cam. I gained 30 rwhp. 23 rwtq. I have Kooks headers, CAI, and a LS6 intake. Total 402 rwhp 380rwtq.

After many autocross races and track days it finally let go.

Just had installed a stock LS6 long block. It dynoed at 374 rwhp. 362 rwtq.
My Kooks headers and CAI are on the motor.

If I just add my AFR heads to this new motor what kind of gains should I expect? Should I mill the heads? Thinner head gasket only?

I'm on a tight budget now.

thanks,
Steve

ssmith512

I'd say thinner head gasket, get the static CR up around 11.5:1 if you can, maybe mill the heads a tad, and enjoy the awesome throttle response (tip-in) the AFR's will offer - as well as some very good peak numbers. ENJOY!

JBIRD02

iTrader: (4)

On a stock motor, I would guess maybe 20rwhp. As far as milling or getting a smaller gasket goes, it would depend on how much you want to mill and how small of a gasket you are wanting to run. But, yeah, it would up your compression and give you a few more horses, but will limit you in cam size later down the road unless you are willing to pull the heads again and make the necessary modifications to avoid piston to valve issues if the cam is too big.

vettenuts

iTrader: (4)

I would contact Tony, but a 0.040" gasket and some milling would be a nice setup since you already have the heads in hand.

Pipelayaz

iTrader: (2)

X2 get the compression up some.

corvette racing

Hey guys I was just thinking. It will probably cost around $2k for milling the heads, pushrods, new 8019 springs, tune, etc. and installation. What about just putting in a small cam and leave the heads alone. It would have to pass smog. Do you think the 220/224 581 114 would be a good choice? I had this cam before and with new cats it would pass. I think putting in a cam would cost about the same as the head installation. I do need good power from 3000 rpm and up. Autocross car mainly.

thanks again,

Steve

primer84z

iTrader: (7)

to answer your original question, there was a guy on corvetteforums that put AFR's on his z06 (LS6) with LT's and tune and dyno'd about 400.

gtorep

iTrader: (18)

If your looking, I have a set of 8019 springs and retainers in the for sale section

crimsonwarrior

iTrader: (2)

This thread has everything you need to know https://ls1tech.com/forums/dynamometer-results-comparisons/327229-stock-02-z06-afr-heads-414-rwhp.html

vettenuts

iTrader: (4)

Why do you need the 8019's with a stock cam? Don't think you do. Milling won't be $2K, or did you mean including installation? If you want power across the band, the heads milled would be my first choice vice the cam.

corvette racing

I talked to Tony and he said that I should mill the heads to 63cc. Plus use the thinner head gasket. 8019 springs? On occasion, I would like to rev this motor to 7100rpm. On some autocross tracks it would be nice not to shift into 3rd. I thought it would probably cost around 2k for labor and all the necessary parts.

Steve

LS1-450

iTrader: (33)

Yes, that will be good for what you are looking for. If you decide to go the head milling route instead of the cam, there's also the option of adding 1.8 roller rockers to increase the valve lift of your stock cam.

davered00ss

iTrader: (4)

Probably see 20-30rwhp. As for milling the heads, $100 to do both of mine.
Follow Tony's advice on the milling.

Install the heads yourslef. Not that hard.