kendo347

Just purchased a new set of Absolute Speed stage 2 5.3 heads worked over by Jay. Got them from Jason over at thunder. Don't have any flow numbers. I will be using a comp 224/228 581/588 on a 112 cam with all the bolt ons on my c5. Just curious how much power these heads will make if anyone has had any previous experience with them.

SouthFL.02.SS

If they're anyhting like what Jay used to spit out, you have some fine heads.
Get a cam that will take you into the .600 range, or at least .598ish to take advantage of what those heads have to offer.

Order 66

Didnt know jay was still porting heads. Was it a left over?

kendo347

I guess they had them over at Thunder Racing laying around new in box. Bought them today for 800.00.


From the for sale forum:
I'm cleaning up some room at the shop, so these heads have to go:

1) Absolute Speed stage 2 heads :

* 5.3l truck heads
* 2.02"/1.57" valves
* Crane dual springs w/ Ti. retainers
* milled .010"
* brand new, in box

$800.00 + shipping

kendo347

Anyone know how much compression a 5.3 head milled .010 will yield?

My90Iroc

iTrader: (26)

That'll get you to about 59 or 60cc in the combustion chamber. Then once you figure out your head gasket you can calculate the compression ratio.

Phil'sC5vette

iTrader: (4)

you may not know it yet dude, but you got a killer set of heads if Jay did do the work on them. He had one of the best heads for an LS1/6 until he went south. They were very sought after.

DaleMX

iTrader: (4)

I got lucky with a set. Very nice set of heads. Jay's told me to keep the lift under .600 for best results. They flowed about 306 @ .6.

The chambers are modified a bit so the compression is around the 10.8 mark I believe (with no milling).

offaxis

iTrader: (19)

Im on my third set of A.S. speed heads. I have had 5.7/6.0/5.3

They have all been top quality and made great power

$800 is a crack head price. Good luck

Steve Burger

iTrader: (33)

I had a set and they worked well. I just sold them to a member of the board.

30th t/a

iTrader: (51)

i had a set older stage 2's + a XER 230/230 cam made 430/402 then i bought a set of absolute stage 2.5 + g5x3 +90mm LSX and made 455/413

KGSloan

i've got a set of his stage 2 cnc heads. 2.04 intake valve, 1.57 exhaust valves

made 440rwhp, 390 rwtq w/ ls6 intake through the 12-bolt

he made a great product, just wasn't the best business man.

Phil'sC5vette

iTrader: (4)

kendo347

Sounds like these heads have potential. Can't wait to get them on.

USMARINE1108

iTrader: (2)

I've got a set waiting to be installed. I can't wait.

Reckless

iTrader: (9)

I put a set of Jay's 5.3L heads on my last engine....I have attached the flow sheet that came with mine.

Cstick

You beat me to stealing them for that price. Jason said on a stock block it would be 11.0:1

USMARINE1108

iTrader: (2)

Back to the top, does anyone else have any experience with AS?

JF WS6

He's a little worse than just a bad business man. He still has about $24,000 worth of product and money owed to members on this board for close to 2 years or more now, one of which being myself. I'd classify that as a thief.

offaxis

iTrader: (19)

JF is correct. ITs too bad too because at the time his heads were some of the best around and thats why so many people ended up sending him there money. I bought my latest AS heads from a friend used. If you can get a good deal on a used set they are definitly a good investment.