piston compression
12-13-2005, 12:58 PM
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piston compression
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 
12-13-2005, 01:54 PM
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Re: piston compression (jdm2teg)
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.
9.1 compresson seems to be a great number for boosted cars.
As i write this i have some 9.1's on order.
12-13-2005, 03:22 PM
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Re: piston compression (SlowAzEg)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SlowAzEg »</TD></TR><TR><TD CLASS="quote">whatever your heart desires!!!!!!!!!!!!!!! 
</TD></TR></TABLE>
or i could have just said that too!
</TD></TR></TABLE>or i could have just said that too!
12-13-2005, 08:11 PM
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Re: piston compression (Boostage)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage »</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.
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12-13-2005, 08:15 PM
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Re: piston compression (jdm2teg)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdm2teg »</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.
Maybe a pound and a half to pull even with a 10:1 car, if that.
12-14-2005, 05:24 AM
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Re: piston compression (tokes1320)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tokes1320 »</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...
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...
12-14-2005, 06:26 AM
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Re: piston compression (Redwidow)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Redwidow »</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
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
12-14-2005, 10:15 AM
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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.
12-14-2005, 10:20 AM
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Re: piston compression (Redwidow)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Redwidow »</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.
Ask yourself what you have to gain going up a point in compression.
12-14-2005, 01:41 PM
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Re: piston compression (Boostage)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage »</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
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
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