I was on c-speed.com and I came to the terrible realization that my Y8 head is not goin to be what I expected on my Z6 Block. I dont know why I was thinking this, maybe wishful thinking; but anyways with this combo I will have a comp ratio of 9.7:1, and with my Z6 Turbo pistons (9:1) I should be around 9.6:1. Keep in mind I have STOCK SLEEVES, my power goal is 300+. Here is a list of some of the stuff I have, so it'll help you guys piece this together.

Y8 head, bowl ported stock cam
Z6 block, GE block guard
eagle rods
9:1 forged pistons
stock crank, balanced everything
Skunk 2 intake
720cc squirts
Lovefab mani & down pipe
Precision t3t4 60 cold, 63 hot
Uberdata.

How much power can my stcok sleeves handle, and with this compression how much boost can I run with this setup? Should I just stop after I hit 300? or is there something Im not thinking about?
Any help would be great, I have been caught off guard by this!

-Rob





Modified by EF8 D-UNIT at 12:51 PM 12/26/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EF8 D-UNIT &raquo;</TD></TR><TR><TD CLASS="quote">I was on c-speed.com and I came to the terrible realization that my Y8 head is not goin to be what I expected on my Z6 Block. I dont know why I was thinking this, maybe wishful thinking; but anyways with this combo I will have a comp ratio of 8.9:1, and with my Z6 Turbo pistons (9:1) I should be around 8.7:1. Keep in mind I have STOCK SLEEVES, my power goal is 300+. Here is a list of some of the stuff I have, so it'll help you guys piece this together.

Y8 head, bowl ported stock cam
Z6 block, GE block guard
eagle rods
9:1 forged pistons
stock crank, balanced everything
Skunk 2 intake
720cc squirts
Lovefab mani & down pipe
Precision t3t4 60 cold, 63 hot
Uberdata.

How much power can my stcok sleeves handle, and with this compression how much boost can I run with this setup? Should I just stop after I hit 300? or is there something Im not thinking about?
Any help would be great, I have been caught off guard by this!

-Rob


</TD></TR></TABLE>

I'm pretty sure you did something wrong... considering the Z6 stock is 9:1 and the Y8 head has a much smaller quench area, it would RAISE compression, not lower it. A Y8 head on that block (all else stock) should be 9.4:1.

Why are you asking us where you shold stop? Thats your choice, not ours..

 

I was wonding how much the stock sleeves can handle before it goes pop, dont worry about the head, it's studded...anyone?

 

Waht the hell!?!?! I just went back on and now its posting different numbers...maybe I did it wrong before so now its posting that I'll have a 9.7:1, and after a 9:1 Z6 forged piston, I'll have a 9.6:1? a little higher than I originally wanted, with this comp I should run lower boost? like maybe 15psi?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EF8 D-UNIT &raquo;</TD></TR><TR><TD CLASS="quote">Waht the hell!?!?! I just went back on and now its posting different numbers...maybe I did it wrong before so now its posting that I'll have a 9.7:1, and after a 9:1 Z6 forged piston, I'll have a 9.6:1? a little higher than I originally wanted, with this comp I should run lower boost? like maybe 15psi?</TD></TR></TABLE>

I've ran 15psi on 10:1 and plan on running 25psi with it. Your compression is not too high.

 

on stock sleeves?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EF8 D-UNIT &raquo;</TD></TR><TR><TD CLASS="quote">on stock sleeves?</TD></TR></TABLE>

I bet yes..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EF8 D-UNIT &raquo;</TD></TR><TR><TD CLASS="quote">on stock sleeves?</TD></TR></TABLE>

Yes sir.

 

I always forget who, but there was a 400whp stock-sleeve d-series around, but dropped a valve (just bad luck).

FYI y8 head is 32.8cc, z6 is 34.6cc. I plan on doing what EF8 D-UNIT is tryin for, cept with an HF manifold with an AC adapter - which should act as a minor anti-reversion piece. Shooting for 300whp with the HF, and 300-400 with a love-fab mini-me manifold. I'm taking one step at a time though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HiProfile &raquo;</TD></TR><TR><TD CLASS="quote">I always forget who, but there was a 400whp stock-sleeve d-series around, but dropped a valve (just bad luck).
</TD></TR></TABLE>

You're probably thinking of gitwidit, but he was Benson sleeved. Howard at ARFab made 400whp on a stock sleeve D16 and so did Matt Patrick, but I don't think either of them dropped a valve.