want to rebuild me d16z6 so i can use more boost a friend of mine suggested boring the block .40 instead of stock bore but wont that raise your compression plan on gettin forged internals block gaurd bearing kit and head bolts and possibly other things but would it be better to bore it out if so what compression pistons should i go with. or is it best to stick with stock bore thanks

 

Its better to overbore the cylinders so you know you have a true circle..I would overbore 0.5 though ,, not 0.4 .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr.speaker &raquo;</TD></TR><TR><TD CLASS="quote">Its better to overbore the cylinders so you know you have a true circle..I would overbore 0.5 though ,, not 0.4 .</TD></TR></TABLE>

hes probably talking 0.040 not 0.4
0.040 is 0.5mm wich is the biggest u can get for aftermarket pistons like JE and still have plenty of sleeve

 

so would this raise the compression, and if i stick to overboring it what compression should i get the 8:1 or 9:1 thanks for the info

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugencivic94 &raquo;</TD></TR><TR><TD CLASS="quote">so would this raise the compression, and if i stick to overboring it what compression should i get the 8:1 or 9:1 thanks for the info</TD></TR></TABLE>

9:1

 

it wouldnt really raise the comp ratio but when you order up some pistons talk to the tech guys and they will set you straight on what you need to get.

 

.040'' is closer to 1mm no?

 

if you plan on boosting I would use 8:1. and as for boring I wouldn't bore too much, you need as much sleeve as possible when boosting, sure a blockguard will help with flexing a lot and is an alternative to using iron sleeves but if you boost way to much say good-bye to your block. Sleeves will only make your block virtually bulletproof

 

Why would you go with 8:1, thats just crazy.. Stick to 9:1-9.5:1..

 

8.1 is just to low for street applications i think.

stick with 9.1

platinum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by platinum00 &raquo;</TD></TR><TR><TD CLASS="quote">8.1 is just to low for street applications i think.

stick with 9.1

platinum.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USDM 4G VTEC &raquo;</TD></TR><TR><TD CLASS="quote">

hes probably talking 0.040 not 0.4
0.040 is 0.5mm wich is the biggest u can get for aftermarket pistons like JE and still have plenty of sleeve</TD></TR></TABLE>

Incorrect.

0.020" is 0.5mm. You bored your block 0.040", which is 1mm over, or 76mm.