will vx pistons lower comp ratio?
 

Well i have a d15z1(vx) and im putting a d16y8 head on and i need to no if my comp is going to be higher or lower?Now ive been trying to work it out on http://www.knology.net/~jediklc/D.htm

but the Piston Dome Displacement isnt preset and ive being trying to work it out ,but ive had no luck.If ne1 no's how to work it out plz let me no cause its freaking me out.

Re:will vx pistons lower comp ratio?
 

Can i just pour water into the dish then messure how many cc's from that.it wouldnt be that good but would it give a close reading?

Re:will vx pistons lower comp ratio?
 

bump

Re:will vx pistons lower comp ratio?
 

You could do the water thing but I would be careful of your valves rusting.

Re:will vx pistons lower comp ratio?
 

In theory it will, but how much is the question. A long time ago I found out that a VX head on a d16A6 block was like 15/1 or so... SO The VX must have dished pistons.

Just ran my D16A6 head/ D16z6 block combo with turbo for the first time today. Its 8.4/1 compression. Good thing, I spiked to 12.1psi with no IC and 93'oct. It didn't knock though...

Re:will vx pistons lower comp ratio?
 

hmmm nice NA motor D16A6 with VX head..

Re:will vx pistons lower comp ratio?
 

Also my head's allready off.The pistons are dished,thats why i thought of filling them with water,then i could just get some paper towel to soak it up after would's.Do u think if i rang honda they could tell me the piston displacement?

Also how did your car feel with less comp off boost?

Re:will vx pistons lower comp ratio?
 

I never turbo'd the stock compression motor. BUT the WRX TD04L spools at the same rate ( according to but dyno ) as my friends TD04L greddy kit did.

Couple of side notes is that I am/was running no IC, and no air filter, OR exhuast !!

We both now have the same compression. He said he noticed a VERY slight change in "off idle" response, but besides that it felt the same.

He runs a greddy kit with 1G DSM IC, TD04L-15G, and big fart pipe, and the block is a stock A6 block with Z6 pistons, where as mine is a Z6 block with an A6 head.

Blew a head gasket last night while on the way to get my DP made :-X
My 1947 autometer boost gauge didn't work, and I guess I was running a little bit too much.
I ran into a turbo talon on the interstate. He heard the loud ass "dump truck sound" and I had my hood off ( exhuast has to go somewhere ). I read his lips, " oohh, ---- that bitch is turbocharged ". I just smiled and noded my head and said ,"yep..". 5 minutes later the head gasket said, " yeppp.. BYE BYE !! ".