What kind of compression ratio would you get with p29 pistons in a d15b vtec.

i really dont know what the math is to find out. any help would be great thanks

 

put this in your favorites

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

 

it really doesn't have my motor on the list

 

this is what i know
1st that my head is the same a d16z6 except for the cam
2nd that my block is pretty my a vx block with different pistons

block
my bore is 75mm
my stroke is 84.5

head
d16z6 34.6

Piston
p29 7.2

Head gasket Thickness
D16Y8 - D16Z6 OEM 0.03700000

this is where i have the problem
Piston-to-Deck Height

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">If you are trying to change pistons in a 1.5L you will need to adjust for VX rods by subtracting 3mm (0.1181 in) from the deck height.</TD></TR></TABLE>

i dont know what to select or do cuz i heard that my rods are the same as a vx so i am lost. if select OEM D16Z6 - D16Y7 the cr is 12.831599855799568. if i select other and type in .1181 i get a low cr of 9.331992906601563

 

bump,

does anyone know the answer or has done this to a d15b vtec?

 

bump

 

9.3 is about right for a stock d15b vtec

 

i read in a few past threads that people say it would yeild high cr, i dotn get why they would say it then

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cxjon &raquo;</TD></TR><TR><TD CLASS="quote">i read in a few past threads that people say it would yeild high cr, i dotn get why they would say it then</TD></TR></TABLE>
i said 9.3 is right for a STOCK d15b

pistons can be wierd,
might have a bigass dome but if they sit lower who knows wtf compression you'll get..

you just need to find out your deck to height so you can get an accurate reading from that calculator

no use trying to figure it out without that.

 

i seen a few people write that it would yeild high cr but you have to use vx pistons in like a d15b7. i am not goign to take my motor apart and spend a **** load of money unless i find out everythign needed

 

p29work well on a d16a1 or a6 with a eg style motor you may want to worry about valve relief issues rather that cr. make sure the valve angles are right..