well i am planning on builing my type r motor and not quite sure on what compression pistons to use, so i was wondering if you guys can help me with the decision. my goal is between 450-500whp. i was thinking something like 9-1 aries. what you gusy think? thanks

 

9.1 compression works. There really isnt like some set compression that turbo motors have to be. I mean there is always those people that run 8.0-1 compression and just push more boost to make up for it. And i have seen some people build 10.5-1 motors for boost. Higher compression will be to blame for detonation possibly but it will take less bost to make the power.

9.1 compresson seems to be a great number for boosted cars.
As i write this i have some 9.1's on order.

 

7.8:1 here

 

whatever your heart desires!!!!!!!!!!!!!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SlowAzEg &raquo;</TD></TR><TR><TD CLASS="quote">whatever your heart desires!!!!!!!!!!!!!!! </TD></TR></TABLE>

or i could have just said that too!

 

cool guys yea i am going with 9-1 compression. wating for them to come in soon

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">7.8:1 here</TD></TR></TABLE> dam, how much are you boostin to make up to the high compression boosted cars.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdm2teg &raquo;</TD></TR><TR><TD CLASS="quote"> dam, how much are you boostin to make up to the high compression boosted cars. </TD></TR></TABLE>

Maybe a pound and a half to pull even with a 10:1 car, if that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tokes1320 &raquo;</TD></TR><TR><TD CLASS="quote">

Maybe a pound and a half to pull even with a 10:1 car, if that.</TD></TR></TABLE> you have a dyno on that? the reason I ask is I have 8:1 now but was suggested to me to change to 9:1...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Redwidow &raquo;</TD></TR><TR><TD CLASS="quote"> you have a dyno on that? the reason I ask is I have 8:1 now but was suggested to me to change to 9:1...</TD></TR></TABLE>

no its just that he runs a huge turbo....like most of us, so a pound and a half is goof for alot of power

 

My motor is is being built as we speak, but it is probably about a 1lb to make a differnece..if any on my setup. seeing that I have a full 3 inch exhuast, CTR cams,jg intake and should be able to run aggressive timing most peoples skin crawl when they think of c/r as low as my 7.8:1 but its not that big of a deal plus the turbo is a sc61 which is still a huge turbo in real life, just not so big on the internet anymore.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Redwidow &raquo;</TD></TR><TR><TD CLASS="quote"> you have a dyno on that? the reason I ask is I have 8:1 now but was suggested to me to change to 9:1...</TD></TR></TABLE>

Ask yourself what you have to gain going up a point in compression.

 

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

Ask yourself what you have to gain going up a point in compression.</TD></TR></TABLE>

The feeling of getting some bad gas and blowing your motor. Thats what i usually think about