Custom .40 over type R pistons???
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From: Canada
Custom .40 over type R pistons???
Hey guys...
saw an ad for a GSR motor, with these custom .40 over type R pistons...
Just trying to understand how exactly that is possible, the largest i've since is the .25 over. Just wondering who would have manufactured these and some prices on it?
It also says it yields a 1.9 liter displacement, is that possible?
thx
saw an ad for a GSR motor, with these custom .40 over type R pistons...
Just trying to understand how exactly that is possible, the largest i've since is the .25 over. Just wondering who would have manufactured these and some prices on it?
It also says it yields a 1.9 liter displacement, is that possible?
thx
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From: Suck it Trebek
Re: Custom .40 over type R pistons??? (jdmhello)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmhello »</TD></TR><TR><TD CLASS="quote">
It also says it yields a 1.9 liter displacement, is that possible?
thx</TD></TR></TABLE>
sure if it has a ls 89mm crank thats possible. otherwise with .04" overbore (82mm) your lookin at 1842cc's (gsr crank) 1880cc's with an 89mm crank
anyway .02 over (.5mm) is a common size for aftermarket but usaually OEM stuff doesn come in .25mm
It also says it yields a 1.9 liter displacement, is that possible?
thx</TD></TR></TABLE>
sure if it has a ls 89mm crank thats possible. otherwise with .04" overbore (82mm) your lookin at 1842cc's (gsr crank) 1880cc's with an 89mm crank
anyway .02 over (.5mm) is a common size for aftermarket but usaually OEM stuff doesn come in .25mm
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From: Canada
Re: Custom .40 over type R pistons??? (JCushing)
If you run a .02 over (.5mm), 82mm bore do you need to resleeve?
Also, how will the LS crank effect R/S ratio?
thx for the quick response btw.
Also, how will the LS crank effect R/S ratio?
thx for the quick response btw.
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From: Southern California, U.S.A.
Re: Custom .40 over type R pistons??? (jdmhello)
Often times the info given in for sale posts is inaccurate. Sometimes due to ignorance, and sometimes because the seller is a scammer. Talk to the party that is selling the motor to find out exactly what they are talking about.
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From: Pittsburgh, PA
Re: Custom .40 over type R pistons??? (riceball777)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by riceball777 »</TD></TR><TR><TD CLASS="quote">the make itr pistons in 25(81.5mm bore) over or 40(82mm bore) over now
i think the 40 overs just came out</TD></TR></TABLE>
-can anyone confirm this? if so that'd be great!!!
i think the 40 overs just came out</TD></TR></TABLE>
-can anyone confirm this? if so that'd be great!!!
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From: Suck it Trebek
Re: Custom .40 over type R pistons??? (chad)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad »</TD></TR><TR><TD CLASS="quote">honda only offers a 81.25 MM overbore piston....</TD></TR></TABLE>
right but he said they were custom type r pistons... i was assuming they were R clones...
as far as the r/s ratio yeah a LS crank will make it lower numerically. this equates to about a 500 rpm or so shift of the tq curve to the lower end of the rpm range. the only reason i included it is if he saif it was a 1.9 it would have to be a ls crank.
you can run a .5 over (.02") you dont have to resleave, im not so sure about the 1mm (.04") though. it seems kinda risky but im sure it can be done.
right but he said they were custom type r pistons... i was assuming they were R clones...
as far as the r/s ratio yeah a LS crank will make it lower numerically. this equates to about a 500 rpm or so shift of the tq curve to the lower end of the rpm range. the only reason i included it is if he saif it was a 1.9 it would have to be a ls crank.
you can run a .5 over (.02") you dont have to resleave, im not so sure about the 1mm (.04") though. it seems kinda risky but im sure it can be done.
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