I have a question about the static compression ratio for this motor combo. It has been along time since i have messed with B series motors so i am not sure.

B16a block, and crank, with CTR pistons, and a GSR head.

IIRC the gsr combustion chamber is different the b16a and b18c1/5 and i thought it neted more compression...


Thanks for the help


Also what would the static compression ratio for this motor be?

I asked this in the hybrid forum and got nothing

 

It would be around 11.6-11.8:1 but you will need to do some clearancing on the ctr pistons to get it to work with th gsr head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR &raquo;</TD></TR><TR><TD CLASS="quote">It would be around 11.6-11.8:1 but you will need to do some clearancing on the ctr pistons to get it to work with th gsr head.</TD></TR></TABLE>

Same clearence that i would need to do with a B16/B18c5 head correct?

The pistons are already cut.

 

I got 12.43:1.

No decking/milling. 81mm bore, no VJ, no machining the pistons.

-.0157 P-D using the compression height listed on theoldone (only place I could find the compression height measured versus figured up).

Take this with a grain. I've never touched a PCT piston myself.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slammed_93_hatch &raquo;</TD></TR><TR><TD CLASS="quote">

Same clearence that i would need to do with a B16/B18c5 head correct?

The pistons are already cut.</TD></TR></TABLE>


Here's a link to a recent post with a similar question and a couple pics for reference. From what I understand you shouldn't have to modify a b16/18c5 head to use these pistons, just the GSR head.

https://honda-tech.com/zerothread?id=2110763

Looking at the numbers again, you'd probably be right around 12:1, roughly in between my and Aquifina's best guesses.

 

thanks for the info guys.