hey guys my pistons arrive today do guys recommend ctr pistons on gsr motor where i live theres only 91 octane at the pump

 

bump anyone

 

y would it matter u already have them. i wouldnt use them cuz your compression would be around 12.5:1 unless u got money for race gas, i would get p30 pistons instead

 

CTR's in a gsr are HUGE.

i'd go with something else. jdm p30's as suggested--- or the easy way, JDM ITR p73's will put you at 11.3:1, and they will fit right onto your stock gsr rods, where as the p30's aren't ideal on gsr rods

 

well ctr fits right on gsr rods right

 

so u bought them not knowing if u should use them and if u even can, wow some ppl amaze me. yes they will fit

 

nah i researched it before i order them i even double check with the company i order from but here i got someone saying there HUGE thats why im asking the Q again

 

ctr's will fit gsr rods.
p30's will fit, but its not an ideal fit...

i think 12.5:1 is an understatement. you'll probably be closer to 13:1 with those pistons in a stock gsr.

ctr's sit above the deck, don't forget.
all those online calculators are wrong. there was a thread on this not too long ago...


IMO, unless you're ready to run race gas mix with you 91, i wouldn't do it.

score some JDM ITR p73, get 11.3:1, and have a nice bump, and still streetable on 91

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pissedoffsol &raquo;</TD></TR><TR><TD CLASS="quote">ctr's will fit gsr rods.
p30's will fit, but its not an ideal fit...

i think 12.5:1 is an understatement. you'll probably be closer to 13:1 with those pistons in a stock gsr.

</TD></TR></TABLE>

correct. Im pretty sure they are 13.2ish:1 with in straight GSR and 13.5 or someing with B18c and LS crank

 

good answer but what grade race gas

 

you seriously wonna run race gas mix/full race gas in your car everyday?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nitroeg &raquo;</TD></TR><TR><TD CLASS="quote">good answer but what grade race gas </TD></TR></TABLE>

nothing personal, but if you have to ask, this isn't for you.

you're looking at $5-7 a gallon dude.... SOO not worth it for a daily driver.

 

if he were to add a thicker head gasket would it help enough to run 91? I dont know him but no one is trying to help

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSpimpTEC &raquo;</TD></TR><TR><TD CLASS="quote">if he were to add a thicker head gasket would it help enough to run 91? I dont know him but no one is trying to help</TD></TR></TABLE>

i don't think they make gaskets that thick

a thicker gasket can drop you a point or 3... but not 10 and point being .1 not 1.0.