I've checked the C speed calculator for the compression on this setup and results were 11.3:1 with 2 layer headgasket and 10.9:1 with 3 layer OEM gasket for .25 OS P30's in a B17. Just wondering if anyone could verify this for me. I've read in the past that this calculator is not accurate at times. I have also done alot of searching and was only able to find threads regarding CTR pistons in a B17, not P30's. If my compression is at about 11.3, should I ditch the BC3+ and go with some Blox B's? Thanks in advance for your help

 

Calling all engine builders!

 

As far as I know, the calculator is only wrong with CTR (PCT) pistons, the rest are pretty correct.

 

if you do decide to ditch the buddy clubs and want to sell them I might be interested in them. But I've heard that the BCs are good for a wide range of CRs. The Blox Bs will give you more up top but not as much in the mid lke the BCs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95TegSE &raquo;</TD></TR><TR><TD CLASS="quote">As far as I know, the calculator is only wrong with CTR (PCT) pistons, the rest are pretty correct.</TD></TR></TABLE>

Good to know. So Im going to assume that 11.3 is correct. I'm still not decided on what cams to choose though. I think IM going to stick with the BC3+. I'd like to know how high they will make power. I know people that have had them fall off about 8k, but thats with their motor only being stock compression B16's (10.2) and GSR's (10.6). I wonder if my compression being just a little higher will cause them to make power a little further into the RPMs, like 8500 or something. What do you guys think?

 

no thoughts on this?