im not to sure about this one im asking for a friend he's not sure if you can directly swap it right in since the C5 pistons are .5mm bigger will it fit directly or do you need to bore it out>???/

thanks fellas

 

Just think about the question for a second... Can you put something into a hole that's .5mm larger than the hole you're trying to put it in....

Now after thinking about that for a second...what seems to "jump" out at you and hit you square in the face....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RIPPO &raquo;</TD></TR><TR><TD CLASS="quote">im not to sure about this one im asking for a friend he's not sure if you can directly swap it right in since the C5 pistons are .5mm bigger will it fit directly or do you need to bore it out&gt;???/

thanks fellas</TD></TR></TABLE>

if u have .5mm overbore itr pistons your gsr block will need a .5mm overbore, its usually a good idea to bore and hone a block before installing pistons anyways

 

b18c5 pistons are standard 81mm unless you want to get oversized pistons. YOu can get OEM c5 pistons which are twice as much as RS Machines itr pistons. OEM only makes 81.25mm itr pistons while RS Mashines makes a variety you can choose from. Biggest Ill go with a B18 block will be bored out to an 82mm. thats the maximum. But if you decide to goe 81.5mm, later on in the road when your pistons messes up, you can rebore your cylinder walls and go with a bigger size piston so you dont mess up and having to sleeve your block. Like the guy above said, take your block to a machine shop to bore and hone before pistons being put in or you can have them do everything for you.

 

thanks alot for the info. now wat about if my friend wants to build a n/a set up wat would be the best size for pistons and you would still need to bore out the block right? i know he's planning on getting skunk2 stage 3 cams and still wants to or plans to dail drive it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RIPPO &raquo;</TD></TR><TR><TD CLASS="quote">thanks alot for the info. now wat about if my friend wants to build a n/a set up wat would be the best size for pistons and you would still need to bore out the block right? i know he's planning on getting skunk2 stage 3 cams and still wants to or plans to dail drive it. </TD></TR></TABLE>

If those are the cams he wants to run, then use pistons that will compliment (work well with) the cams and the rest of the build/intended use. If you're still not sure exactly what to do then I suggest you STOP immediately. Do some reading/research, come up with a plan for what you want to accomplish and then select your parts that will allow you to reach your goals. By plan I don't mean just power goals and a questionable budget. I mean figure out what you want to accomplish, what parts you'll ned to do it and the costs involved. Can you afford it? if yes, then proceed, if not you'll have to re-evaluate your goals.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RIPPO &raquo;</TD></TR><TR><TD CLASS="quote">thanks alot for the info. now wat about if my friend wants to build a n/a set up wat would be the best size for pistons and you would still need to bore out the block right? i know he's planning on getting skunk2 stage 3 cams and still wants to or plans to dail drive it. </TD></TR></TABLE>


most ppl who do all motor builds go 2.0L somehow. u have two options, either resleeve to 84+mm or get a b20 and freshen it up with a bore and hone and your good to go. but im pretty sure the sk2 stg3 cams need pretty high compression like 12:1+ so keep that in mind when selecting pistons. generally oem pistons tend to give a little more longevity over forged pistons because they dont expand as much when they warm up, so clearances can be tighter