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Thread: How much compression |
tking
Novice Class
Posts: 67
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posted May 16, 2012 04:56 PM
How much compression
My head is milled .030 and I run a 40 shot every now and then when at the track. Would 13.5:1 pistons be ok to run?
  
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smokinZX14
Needs a life
Posts: 10197
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posted May 16, 2012 05:13 PM
Don't spray with pump gas ...112 or better only ..
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Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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tking
Novice Class
Posts: 67
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posted May 16, 2012 05:33 PM
No I wouldn't, I mean street riding would it be ok with that compression and 93 octane?
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smokinZX14
Needs a life
Posts: 10197
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posted May 16, 2012 05:37 PM
quote:
No I wouldn't, I mean street riding would it be ok with that compression and 93 octane?
Oh yes 93 on the street will be fine ..
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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entropy
Moderator
Posts: 8671
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posted May 16, 2012 06:26 PM
13.5:1 pistons + .030 off the head could lead to CR = 15:1???
that would be pushing pump gas a bit...
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BlackMagic14
Needs a job
Posts: 2031
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posted May 16, 2012 06:51 PM
I think you would be ok without the spray depends on what is the highest octane available in your area. 93 would be the lowest I would run. And I agree with Smokin I would stick to the good stuff on the spray. You running stock valve springs?
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tking
Novice Class
Posts: 67
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posted May 16, 2012 06:53 PM
It has carpenter springs in it
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smokinZX14
Needs a life
Posts: 10197
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posted May 16, 2012 07:15 PM
 Edited By: smokinZX14 on 17 May 2012 02:23
quote:
13.5:1 pistons + .030 off the head could lead to CR = 15:1???
that would be pushing pump gas a bit...
He doesn't have 13.5 pistons .. He has stock pistons with the head milled 30 .. No where near 15.1 .. Closer to 13.1
P/S entropy i hope you are feeling better and getting back in to shape ..
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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entropy
Moderator
Posts: 8671
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posted May 16, 2012 08:26 PM
smokin',
i am slowly getiing back to normal, it's gonna be a long haul... You know what a long haul is i'm sure.
I took his note to mean that hehas milled .030 off the head and is now looking at installing pistons designed to give 13.5:1 (with stock head)
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