They are stamped "STD" standard bore i assume ...

I bought this motor as a stock motor , i took it aparts and got this.....It's a 94 gsr.
Has arp rob bolts , head studs , Itr oil pump. stock rods

Also , stock sleeves? I am not famialr with GSR's



~Jake

 

Looks sleeved with forged pistons.

 

they look like aluminum

 

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

werd

 

also the stamp where it says "b18c1" has HG stamped on it.

 

I agree it looks sleeved and those are not stock pistons.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybrid_vtec &raquo;</TD></TR><TR><TD CLASS="quote">I agree it looks sleeved and those are not stock pistons.</TD></TR></TABLE>

Yeah , i know they arent stock , they are forged.....my questions was, what are they? I have been doing my research and they look like Cp 10.5-1 standard bore.

You think they are aftermarket sleeves?

 

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

Yeah , i know they arent stock , they are forged.....my questions was, what are they? I have been doing my research and they look like Cp 10.5-1 standard bore.

You think they are aftermarket sleeves?</TD></TR></TABLE>

The pistons should have the name on the bottom side.
Glenn

 

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

You think they are aftermarket sleeves?</TD></TR></TABLE>

Yep.

Did you measure the bore?

 

No , but the pistons are stamped STD though. so im guess 81mm. I havent had a chance to take it to my shop yet , it is at my house right now.

~Jake

 

The cylinder walls arent in the best shape , im thinking of having it bored over. Think i could Go 84mm with it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EF CRx_N_motion &raquo;</TD></TR><TR><TD CLASS="quote">No , but the pistons are stamped STD though. so im guess 81mm. I havent had a chance to take it to my shop yet , it is at my house right now.

~Jake</TD></TR></TABLE>

Well there's about an 1/8" diff between a 81 bore and a 84 bore, check it with Mr. Stanley.

 

werd. How much cylinder wall shoud be left to still remain stout?

 

Yes its sleeved .
If it's 81mm then theres definatly room to go 84mm by the look of it in the pics.
Appears to be a RS machine style sleeve job.. Mine were crooked like yours are. (look where the sleeved butt up to each other)

 

I have had 2 people say they look like "old style" benson sleeves.

Hmm , that's cool . I'm going to measure it out tomorrow , Take it to the machine shop and see abouts having it bored out.

Im thinking of going with the 84mm 12-1 endyne rollerwaves. I ran 81.5MM rollerwaves in my Old ls and i liked them and i never had any problems with them.


appreciate the help Guys

 

I have a set of fully coated 84.5 rollerwaves FS ..pm me if interested.

 

pm'd

 

rollerwaves

 

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

That's the word on the street

 

i have some flat top wiesco that looks that them.

 

i know its irrelevant to this post, but those flat pistons look IDENTICAL to D15 (DX) flatop pistons after theyve been belt sanded. i run them now with phenomenal detonation resistance.

 

werd

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike_belben@yahoo.com &raquo;</TD></TR><TR><TD CLASS="quote">i know its irrelevant to this post, but those flat pistons look IDENTICAL to D15 (DX) flatop pistons after theyve been belt sanded. i run them now with phenomenal detonation resistance. </TD></TR></TABLE>