CR3X

Thinkin about bumping my compression up a little bit. Whats this I hear about zc pistions in a d16a6 block with z6 vtec head giving you 12:1 compression? Im getting my vtec head here soon and my friend mentioned something about this. If anyone has messed with this let me know about it

jlicrx

compression ratio would be about 11.6:1

CR3X

Is it a safe set up?

wiZCo

Perfectly safe.

CR3X

What kind of power gain should I notice if any?

randY49

Out of curiosity, what would z6 pistons in an a6 block, with a6 head, run for compression?

jlicrx

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by randY49 &raquo;</TD></TR><TR><TD CLASS="quote">Out of curiosity, what would z6 pistons in an a6 block, with a6 head, run for compression?</TD></TR></TABLE>8.13:1

EDIT: sorry, should say 8.43:1


Modified by jlicrx at 7:55 AM 6/25/2008

CR3X

So that would lower your compression? If Im not mistaken d16a6 has a comp of 9.1:1. Adding the ZC pistons it lowers it to 8.4:1 but add the vtec head and jumps you up to 12:1. Could somone please explain how to calculate compression ratios?

AK_CRX

na, your a little mixed up. ZC pistons are domed, they raise compression quite a bit. Then the z6 head has a smaller chamber than the A6 so this would also up your compression. Also running the 92 or newer head gasket would give it another little bump in compression. Yeah it's a safe setup w/tuning. If you just throw it together and run it on stock ecu you will be predetonating everywhere even with good gas. Try this handy little tool...

http://www.knology.net/~jediklc/dcalc.htm