Mini-me compression ratio?
04-01-2004, 08:01 PM
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Mini-me compression ratio?
If I put a Y8 head on a Y7 block, what is the new compression ratio? Also, what is stock for the Y8? Anyone mill this combo before? How high did you raise the comp. ratio?
04-01-2004, 08:35 PM
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Re: Mini-me compression ratio? (1990hondaHF)
04-01-2004, 09:42 PM
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Re: Mini-me compression ratio? (skuby_do)
great site but it says I need the bore and stroke....I have no idea what that is for the d16y7....anyone know that?
04-01-2004, 09:45 PM
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D16Y7
ROD LENGTH: 5.393"
STROKE: 3.543"
BORE SIZE: 2.952" (75MM)
COMPRESSION HEIGHTS: 1.181"
DOME HEIGHT: -.130"
Found here: http://www.superhonda.com/foru...25367
ROD LENGTH: 5.393"
STROKE: 3.543"
BORE SIZE: 2.952" (75MM)
COMPRESSION HEIGHTS: 1.181"
DOME HEIGHT: -.130"
Found here: http://www.superhonda.com/foru...25367
04-01-2004, 09:52 PM
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Re: (MichaelJComputer)
Thanks....with that calculator it comes up with: 10.23:1 Comp ratio....that seems high to me...or am I doing it wrong? (D16Y7 block and D16Y8 head) Is that an ok CR to run an a daily driver? I hate to sound stupid It's just that I've never delt with internals or head swapping before....I've always jsu swapped the whole engine or tranny....
04-01-2004, 09:58 PM
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Re: (MichaelJComputer)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MichaelJComputer »</TD></TR><TR><TD CLASS="quote">Run premium gas and you should be alright.</TD></TR></TABLE>
...the word "SHOULD" scares me a bit
...the word "SHOULD" scares me a bit
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04-01-2004, 10:00 PM
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Re: (1990hondaHF)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1990hondaHF »</TD></TR><TR><TD CLASS="quote">
...the word "SHOULD" scares me a bit </TD></TR></TABLE>
A stock Type R is 10.2:1, so you WILL be fine. But you do need to keep in mind you have a much older motor.
...the word "SHOULD" scares me a bit
</TD></TR></TABLE>A stock Type R is 10.2:1, so you WILL be fine. But you do need to keep in mind you have a much older motor.
04-01-2004, 10:01 PM
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Re: (BauleyCivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BauleyCivic »</TD></TR><TR><TD CLASS="quote">Y8 head with Y7 block will be like 9.0:1, stock Y8 compression is 9.6:1 and the Y7 has an even greater dish in the pistons.</TD></TR></TABLE>
Where did he get 10.23 then? Me so confused, d-series is stupid.
Where did he get 10.23 then? Me so confused, d-series is stupid.
04-01-2004, 10:05 PM
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Re: (MichaelJComputer)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MichaelJComputer »</TD></TR><TR><TD CLASS="quote">
Where did he get 10.23 then? Me so confused, d-series is stupid.</TD></TR></TABLE>
I dont know. Actually I think it will be less...On that site it doesnt have the CC's for the Y7 pistons dish. But, with d16z6 pistons compression is 8.9:1, and the dish on the Y7 pistons is .32mm larger than the Z6 pistons
Where did he get 10.23 then? Me so confused, d-series is stupid.</TD></TR></TABLE>
I dont know. Actually I think it will be less...On that site it doesnt have the CC's for the Y7 pistons dish. But, with d16z6 pistons compression is 8.9:1, and the dish on the Y7 pistons is .32mm larger than the Z6 pistons
04-01-2004, 10:17 PM
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Re: (BauleyCivic)
I originaly put in 75 and 84.5....should have put in 75 and 90. Thats why it was higher. I had the wrong info. Now it says 10.83:1....but that with the PM3 pistons....T get the exact amount I need the CC's for the P2E pistons, which http://www.knology.net/~jediklc/D.htm doesn't give me......I got a different number for the same swap here: https://honda-tech.com/zerothread?id=69052710.63:1...damimit, what does this have to be so hard 
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