ok, so im just doing some preliminary build ideas for my engine. im not doing anything anytime soon as i have no money or time, but im just brainstorming (dreaming in other words, lol)

my question is about the weight of pistons. i had initially planed to use JDM ITR pistons in my gsr block. they are a direct fit for gsr rods. i was also going to combine this with a 2 layer gasket and ctr cams. this would raise my compression to the 11.6-11.7 range. was gonna tune it wiht probably just a vafc and some 310 injectors (not sure if thats even necessary)

now i was searching on this forum (sircrxracer something or other) and i came across a guy with a gsr block, itr head ported with ctr cams and b16 pistons. with just tuning from a fields vtec controller (stock injectors and fuel pump) he put down 195 whp and 140 trq and ran a 12.9 on slicks with full interior, impressive. the b16 pistons will yeild a higher compression ratio and will probably eliminate the need for a 2 layer gasket to obtain the same 11.6-11.7 compression range. not to mention the fact that b16 pistons are easier to find and cheaper too. but are they also lighter? what about the strength? and arent the type r pistons coated thermally on the skirts?

just looking for some opinions on which would be a better way to go. the b16 pistons? or the itr pistons? also tuning suggestions are welcome too but i dont plan to go uberdata, hondata or any of that other stuff, just too much hardware for me to worry about. this isnt some full out race project, just a mild build. mostly to be used for daly driving and occasional racing at the track, so reliability of the build will be an issue too.

thanks.

 

Get some CTR pistons

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC 91 Civic &raquo;</TD></TR><TR><TD CLASS="quote">Get some CTR pistons </TD></TR></TABLE>

I was thinking about getting some P30 pistons or maybe CTR pistons to put in my JDM GSR motor too. But I saw a long thread in all motor forum saying that the actual compression ratio for CTRs is really high like around 12.5 or 12.9. Before I thought it was 11.5-ish cause I used c-speed's compression calculator, but now I dont know what to believe after reading the thread in the all motor forum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC 91 Civic &raquo;</TD></TR><TR><TD CLASS="quote">Get some CTR pistons </TD></TR></TABLE>

like i said, im not going all out with this. i just want something subtle. please keep this a discussion between the p30 bistons and the p73-00 pistons (JDM) im concerned with the weird of each as well as how reliable on will be vs the other. im also curious as to the differences between the pistons (besides dome size) like the coating on the type r skirts and the differences in what they are made out of, the differences in how they are made (ive heard that the type r pistons are semi-forged) and how all this will affect my performance results and how they will affect the reliability of the build.

basically trying to figure out if there are any advantages of the JDM P73 over the P30 and if they are worth the extra money.

 

just thought i'd post that for some reason.

 

riiiiiight. again, im not using those pistons, nor do i plan to.

 

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