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B20Vtec Compression(GSR head)

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Old Feb 21, 2009 | 08:06 AM
  #1  
type_r_teggy's Avatar
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Default B20Vtec Compression(GSR head)

I'm hearing conflicting results from using rs machine ITR pistons with a GSR head, what compression would that yield? Some saying 11.7 others like 12+...
What is the real compression with that combo?
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Old Feb 21, 2009 | 08:56 AM
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grand champ's Avatar
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Default Re: B20Vtec Compression(GSR head)

http://www.zealautowerks.com/bseries.html
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Old Feb 21, 2009 | 09:43 AM
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type_r_teggy's Avatar
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Default Re: B20Vtec Compression(GSR head)

13.3cr???
something about that doesn't seem right....
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Old Feb 21, 2009 | 10:46 AM
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00Red_SiR's Avatar
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Default Re: B20Vtec Compression(GSR head)

I got 12.68:1 but you need hard numbers to really know, not guesstimates.
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Old Feb 21, 2009 | 11:35 AM
  #5  
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Default Re: B20Vtec Compression(GSR head)

ok, but i wanted this to be my daily, and with that compression and shitty gas(90 octane barely), i think i may need to re-think my build. what u think?
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Old Feb 21, 2009 | 01:06 PM
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stl eh2's Avatar
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Default Re: B20Vtec Compression(GSR head)

get a thicker headgasket?
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Old Feb 21, 2009 | 06:49 PM
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Default Re: B20Vtec Compression(GSR head)

sell the itr pistons and get after market pistons with the compression you want. simple as that...
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Old Feb 22, 2009 | 05:57 AM
  #8  
00Red_SiR's Avatar
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Default Re: B20Vtec Compression(GSR head)

use USDM GSR pistons instead.
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Old Feb 22, 2009 | 03:08 PM
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Default Re: B20Vtec Compression(GSR head)

Originally Posted by 00Red_SiR
use USDM GSR pistons instead.
are you joking??

b20=84mm
b18(gsr)=81mm

talk about major piston slap.lol
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Old Feb 22, 2009 | 04:31 PM
  #10  
00Red_SiR's Avatar
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Default Re: B20Vtec Compression(GSR head)

lol, I forgot that it was a b20.
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Old Feb 23, 2009 | 08:28 AM
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Default Re: B20Vtec Compression(GSR head)

i'm doing this same build i thought it was around 11.9~12:1cr
i'm at 2500ft above sea level and we have 93octane here so i thought i'd give it a try as my daily.
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