well, last week the tired B16 gave in, somehow broke a valve and slapped the **** out of the #4 piston. Anywho ive been rebuilding it and i decided to go with CTR pistons. They came in today but after looking at them hard, it seems as if the rods wont fit in the pistons... do i need to shave the rods? i dont have a micrometer to measure them, so i figured id ask here. I always thought this was a common thing to do, PCT pistons on B16A's.. I have a 2nd gen B16 BTW.

also the dome on these things are some real mountains compared to P30's, hows the clearance? Can I run an OEM 3 layer HG? I am going to be using ARP head studs BTW, just so yall know. Id appreciate any help to a first time engine bulder

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also had a couple other questions. I wasnt sure what the 'X' was on the pistons, where its maked PCT.. It said PCTX. They are supposed to be .25 overbore, dunno if that has anything to do with it? Hope they are real honda pistons? The were $270, came in honda boxes with new OEM rings and wrist pins, wrapped in Japanese newspaper lol.

like i said this is my first time really tearing apart a bottom end, so any pointers would be appreciated, im not trying to get slammed, jsut looking for some advice, and i knwo you guys are the smartest. thanks!

 

guess none of the 64 people who viewed this thread know anything about CTR pistons?

 

Ls and B16 rods need to be shaved (or you can shave the piston) for GSR typr R or CTR pistons.

i hope your upgrading your valvetrain based on what happened to this motor..

 

yep, im actually picking up a 00 si head with Crower valve springs and retainers.. (my head was toast after this incident)

also going to order a CTR intake cam, think this setup will be safe to take to 8500 or so? i def. dont want to push my luck again, although it was a freak accident as my valve broke off in the retainer, and no one i talked to has ever seen this.

 

Over rev?

 

yea you got to shave the pistons or the rod . me myself shaved the piston , im runing a lsvtec with those pistons on a ls block and gsr head and dont have no clearance problems. it just was pining cause of the block beeing decked and the head beeing shaved. but cft tuned it and its runing good . youll be all right, just get it tuned. out here we got colombia ,hes the best... the secret out in orlando in tuning is rolo and colombia ,the perfect combination....

 

keep us updated,

 

i think CTR pistons stick out of the deck a little. compression would be way up there.

yea, shave the piston.

 

b16 block and head with ctr pistons isnt even gonna push him into the 11:1 compression area with a stock headgasket . depending on the valves if they are flat or not and what headgasket hes going with , the compression wont be too high at at all...

 

so i should shave a little off the pistons instead of the rod? is this something my machine shop should do for a fairly reasonable price, or can i attempt this myself? just seems like some of you are doin it yourself with statements like 'me mylsef shaved the piston' and such. just trying to clear things up. and what are the pros cons to doing to pistons vs. the rod, b/c to me it sounded better to take it off the rod.. just wondering..

i plan to use an OEM Honda 3 layer HG, and ive had some confusion if this setup yeids the same compression as a B16B, or if it is slightly higher? does anyone actually know?

 

actually this happened top of second gear, stock revlimiter on P30 ecu, right around redline and all hell broke loose.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B16Aek &raquo;</TD></TR><TR><TD CLASS="quote">so i should shave a little off the pistons instead of the rod? is this something my machine shop should do for a fairly reasonable price, or can i attempt this myself? just seems like some of you are doin it yourself with statements like 'me mylsef shaved the piston' and such. just trying to clear things up. and what are the pros cons to doing to pistons vs. the rod, b/c to me it sounded better to take it off the rod.. just wondering..

i plan to use an OEM Honda 3 layer HG, and ive had some confusion if this setup yeids the same compression as a B16B, or if it is slightly higher? does anyone actually know? </TD></TR></TABLE>

The compression ratio will be higher, The B16B block is the same as a B18C5 block.

Eric

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ff-sqaud.com &raquo;</TD></TR><TR><TD CLASS="quote">For those that wanna use any of these 'R' pistons in/on your B16A or B17A engine, you HAVE to do the following or else the 'R' piston will NOT fit. You do not have to do this rod-mod to any of the B18C/C1/C5 rods.</TD></TR></TABLE>

 

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

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

thanks to ff-squad for the pic

 

that setup will be fine to rev to 10k if you get better cams. like crower 63403's. IMO. i loved it in my car

 

have a machine shop mill the rod. i ran the pct's with stock b16 cams in a b16 block and made 144whp reving to 8400.

 

ishh

 

144whp is less than 3 of my friends stockish Si's made. if ur gonna add some compression, get some real cams and make use of it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slo blue &raquo;</TD></TR><TR><TD CLASS="quote">have a machine shop mill the rod. i ran the pct's with stock b16 cams in a b16 block and made 144whp reving to 8400. </TD></TR></TABLE> thts nice,, on pump gas,

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slo blue &raquo;</TD></TR><TR><TD CLASS="quote">have a machine shop mill the rod. i ran the pct's with stock b16 cams in a b16 block and made 144whp reving to 8400. </TD></TR></TABLE>

That all?

 

well its off to the machine shop today to drop off all my pistons and rods.

and yeah 144whp sounded a tad low? i was shooting for high 150's with a CTR intake cam... so should i just hold off on the CTR cam and wait a little while and go with some good aftermarket cams? what do you think would be a good cam for my setup? gas mileage and price are not an issue, as im more concerned with reliable performance.

 

Stock bore PCT pistons in a B16 is ~11.9:1-12:1 c/r, no milling with a stock head gasket.

 

youre getting a head with better valvetrain, go for better cams than the CTR

 

the 2nd gen jdm b16 cams do a little bit better with PCT pistons than the usdm cams will.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRiXZc &raquo;</TD></TR><TR><TD CLASS="quote">Stock bore PCT pistons in a B16 is ~11.9:1-12:1 c/r, no milling with a stock head gasket.</TD></TR></TABLE>

^ That's the truth...you'll need some cams with larger primaries and tuning if you want you motor to last.