I want to put p30 pistons in my jdm b18b to raise compression!! I've looked up the toping and I know that a machine shop can press the p30's with my stock rods and that my compression will go up....but want I dont' know, since the deck height of a b16a2 and a b18b are different, is if I will run into a clearence problems????

Need help and backed up info please!!

Thanks!

Pat

 

no unless your runngin a super large cam or have had the head milled to far or the deck "decked" to much

 

no milling but will be using crower 403's???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by psegs80 &raquo;</TD></TR><TR><TD CLASS="quote">no milling but will be using crower 403's???</TD></TR></TABLE>

you should be fine, just clay your engine

 

what do you meen by clay??? This my first engin build!

 

Never mind I looked it up but I don't really want to do that, I would like to have answers best on calcalations (that I don't know how to do) or experiences tha people have had!!

Thanks thow pointing me in a good direction!!

Pat

 

There are guys using CTR pistons with your setup and no problems, except they have mad compression. P30's are used all the time in the LS engines, and if your that worried, use PR3's, they are 10.8 compression compared to the 11.0 of P30's.

http://www.nonvtec.com/board/v...ff92b

Read about a few sweet B18A/B setups.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sam92Teg &raquo;</TD></TR><TR><TD CLASS="quote">There are guys using CTR pistons with your setup and no problems, except they have mad compression. P30's are used all the time in the LS engines, and if your that worried, use PR3's, they are 10.8 compression compared to the 11.0 of P30's.

http://www.nonvtec.com/board/v...ff92b

Read about a few sweet B18A/B setups.</TD></TR></TABLE>

yea i was gonna mention that a guy on here has a ls engine built with ctr pistons and crower 405's and still has plenty of space.

 

thanks guys, I will order a set of p30 and I'm guessing I need the p30 rings and locks?

Thanks again

 

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

yea i was gonna mention that a guy on here has a ls engine built with ctr pistons and crower 405's and still has plenty of space.</TD></TR></TABLE>
yes. using pistons from a VTEC motor will yeild lots of piston-to-valve clearance because the LS has smaller valves by 2mm intake, 3mm exhaust (i think those are the numbers). so since it has smaller valves, and knowing a little trigonometry, you'll find that that couple mm of smaller valve head radius translates into more space for high-lift cams than most motors will ever see, even with the slightly lower deck delta of B16 engines.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95lstegman &raquo;</TD></TR><TR><TD CLASS="quote">
yes. using pistons from a VTEC motor will yeild lots of piston-to-valve clearance because the LS has smaller valves by 2mm intake, 3mm exhaust (i think those are the numbers). so since it has smaller valves, and knowing a little trigonometry, you'll find that that couple mm of smaller valve head radius translates into more space for high-lift cams than most motors will ever see, even with the slightly lower deck delta of B16 engines.</TD></TR></TABLE>

lol, oops forgot to add that....thanks man