ok guys im gonna turbo the b16b, question is right now i got a thin headgasket that puts my compression up at 11.1-11.2, shoud i

A. put a stock head gasket on, turbo it with stock compression (stock is 10.8:1) and tune hella close

B. put a cometic .051 thick headgasket that will drop my compression to 10.3:1

anybody is welcome to correct my math in stating that .051 will bring me to 10.3 thanks all...

tunning will be done with crome. will use AEBs head studs. 7 psi. 91oct pump gas.

COST IS NOT AN ISSUE. I AM SIMPLY CONCERNED WITH DETONATION.


Modified by blinx9900 at 6:34 PM 11/10/2006


Modified by blinx9900 at 4:05 PM 11/12/2006


Modified by blinx9900 at 4:05 PM 11/12/2006

 

I would say stock HG simply because the Cometic gaskets screw with the quench and tend to blow out. But 10.8:1 compression is still pretty high for a turbo engine on pump gas with stock pistons.

 

screwing with quench? yeah got stock pistons going fro 7psi, would this really be an issue, recoomend a different gasket manufacturer? im gonna have aebs head studs...

 

i use oem it holds boost well ive seen it handle 38psi

 

OEM, hell, I even did my head studs without taking the head off, just did them one at a time and the original OEM head gasket is still holding up!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nebulight &raquo;</TD></TR><TR><TD CLASS="quote">OEM, hell, I even did my head studs without taking the head off, just did them one at a time and the original OEM head gasket is still holding up!</TD></TR></TABLE>

im not worried about the oem gasket holding up, im worried about the 10.8:1 compression and shitty california 91 octane gas... and the possibility of getting a tank of bad gas...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blinx9900 &raquo;</TD></TR><TR><TD CLASS="quote">

im not worried about the oem gasket holding up, im worried about the 10.8:1 compression and shitty california 91 octane gas... and the possibility of getting a tank of bad gas...</TD></TR></TABLE>

Well, just tune conservative with your timing and don't worry about

And think of how quick your turbo is going to spool!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nebulight &raquo;</TD></TR><TR><TD CLASS="quote">Well, just tune conservative with your timing and don't worry about

And think of how quick your turbo is going to spool!</TD></TR></TABLE>

im thinking about it i like that idea a lot one thing though and sorry if im being ****, will i make more power with 10.8 and a conservative tune or 10.3 with a more aggressive tune? same psi ofcourse. thanks everybody im leaning toward teh 10.8:1 option...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blinx9900 &raquo;</TD></TR><TR><TD CLASS="quote">

im thinking about it i like that idea a lot one thing though and sorry if im being ****, will i make more power with 10.8 and a conservative tune or 10.3 with a more aggressive tune? same psi ofcourse. thanks everybody im leaning toward teh 10.8:1 option...</TD></TR></TABLE>

well, just run the same amount of boost, just less timing and you can make the same amount of power as you would with the different compression levels.

 

but wont the motor be under more stress?

 

check out all the other sce gaskets.. tehy come in different thicknesses

http://www.scegaskets.com/products/ics.html

 

if you are looking for lower than stock compression id suggest doing it with pistons, not a thicker hg. i think you will be fine with a oem hg, again with a good tune as you will be more prone to detonation. obviously timing will probably be less agressive to reduce cylinder pressures as well.

there are plenty of stock gsr (jdm and usdm) and type-r motors with stock compression making safe power, i dont think you will have a problem.

 

so are you saying that the motor will be under the same stress whether its stock hg and retarded timing or thick head gasket and more agressive timing.

 

well i dont really have the experience to give you a definite answer, but from my understanding, in general high compression and advancing timing create greater cylinder pressures. so for your setup (high compression) you will want conservative timing to counteract. maybe just a safe step retard until you can get it on the dyno and have an experienced tuner take care of you.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blinx9900 &raquo;</TD></TR><TR><TD CLASS="quote">ok guys im gonna turbo the b16b, question is right now i got a thin headgasket that puts my compression up at 11.1-11.2, shoud i

A. put a stock head gasket on, turbo it with stock compression (stock is 10.8:1) and tune hella close

B. put a cometic .051 thick headgasket that will drop my compression to 10.3:1

anybody is welcome to correct my math in stating that .051 will bring me to 10.3 thanks all...

tunning will be done with crome. will use AEBs head studs. 7 psi. 91oct pump gas.

COST IS NOT AN ISSUE. I AM SIMPLY CONCERNED WITH DETONATION.

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

Then sell the b16b block, buy a gsr/b18/b16a and with the leftover $$$ buy some forged pistons and rods at a safer 9:1 cr or so and an aptly sized turbo for good response and boost away.

ps - the gen consensus is that hp is what kills engines NOT boost pressures as different turbos will have different flow rates at the same boost pressure (pressure ratio). And an engine basically being a big air pump makes more power when more air flows through it.

 

ehhh, thats not what i mean when i said cost is not an issue, i meant with the hg change cost is not an issue, your option is good but not the direction im ready to go in, though the results would be great, its a lot of down time and im just too busy to get that deep into it...