i have a gsr and i need rings its all stock internals and i want to turbo at the end of the summer i was going to just put new pistons in while it was apart i was wondering what would be better for turbo

 

any piston with a dish construction

 

The brand depends on what kind of money you wanna spend.

CP Pistons are what I'm going to get, cause of my engine builders recommendation. Also, through reading on HT, people have said the clearances are better. Although it doesnt really matter if you do the machining after you get the pistons, it would still be easier, in my eyes, to just get the CPs.
how much money are you looking to spend.

 

i know this sounds dumb but what are cp pistons?

 

LMFAO they are pistons but "CP" is the name of the company google it and check out there website also look up
arias
wiseco
endyne ( the old one ) roller wave will be the name of the pistons

 

thanks lol what kind of ratio do i want to get

 

what size pistons fit a gsr wit stock bore

 

are you sure you can use stock bore?

Have you had a machine shop take a look at it to make sure its all clean and nice?

Usually retailers will have what sized pistons your engine needs. Youll look at the list and some will say what engine they are for.

 

the stock bore is 81mm on all b-series motors and if you want to get a larger bore that involves sleeving or boring out the stock sleeves and the safest large bore to run on a boosted b-series is 84.5mm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony413 &raquo;</TD></TR><TR><TD CLASS="quote">the stock bore is 81mm on all b-series motors </TD></TR></TABLE>

not all

 

whats a good boost ratio?

 

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

not all </TD></TR></TABLE>

haha ok ok fine the B20's are the only blocks with a stock 84mm bore happy now.

to OP there isnt a boost ratio unless you meant compression ratio and for that it varies on what you want and need goal wise.

 

i was wondering if i need a high compression or low compression piston what one will be better for turbo

 

low compression is better for turbo.
Higher compression can be turbo'd just fine, but theres less of a safeguard with it. high compression is more prone to detonation if I'mt hinking correctly.

you can go with 9.5:1 or so, something around there. That way it'll have nice drivability out of boost, and in boost.

 

so high compression wit turbo is more likely to crack the block? so low compression is safer

 

yes, low compression is safer.

Also, lower compression can often yield higher boost numbers, even though it doesnt really matter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1993gsrcivic &raquo;</TD></TR><TR><TD CLASS="quote">so high compression wit turbo is more likely to crack the block? so low compression is safer</TD></TR></TABLE>

it wont exactly crack the block but it can crack te sleeves if pre-ignition or detenation occurs. and anywhere from 8.8 to 10.0 is fine for boost. but think about this also rising compression also rises temperature in the motor as does the turbo and heat is a factor that can cause pre-ignition so because as to not run alot of boost on a 10:1 motor i believe 15psi is very acheivable but requires correct tuning and fuel supply.

 

http://cgi.ebay.com/ebaymotors...photo

so this would be ok pistons for boost

is this the dish shape you was talking about

 

if you're going to spend money on pistons at least get forged ones. they're lighter, stronger, and will handle the abuse better.

 

WOW where's the search police on this one.

any way the compression ration you want needs to be based on what your driving style is and overall power goal is.

anything from 8.5-9.5 is generally a good idea

i went with around 10 because i like some compression but i am not goin for godzilla power im goin for fun and drivability close to stock at low rpm.

anyway i like wiseco pistons i dont really read anything bad about them, know NUMEROUS people using them and the best tuner i know suggested and uses them.

and i have wiseco pistons so i might be a little biased. CP's are bad *** but with the prior history i am weary even if the problem has been fixed