ITR's are 81mm stock, so yes they make ITR pistons in 81mm and all the way up to 81.5, I believe.

As far as the pistons working on LS rods, I believe a machine shop will have machine the rods small end to fit into the pistons. That's not something you necessarily have to worry about since the machine shop will do the work for you.

alright guys what do u guys think is the best pistons p30s ot itr for everyday driving stock bore ls Crower Cams (403's), Cam gears, Dual v.s., Intake manifold, Bored throttle body, I/H/E, and tune on ls head or maybe later b16a head maybe that only if im not happy with the built ls head. oh and by the way do u guy recommed block guard or not.

my recommendattion is to go with itr pistons.

you don't need a block guard.

ok cool what do u think i will be abel to pump out this motor with a good tune.

with a good tune...like 180ish

true.

As far as I know the ls rods don't need to be machined to fit the p30 pistons

they dont have to...but for ITR's they do have to

Just wondering do the ls rods need to be machined to fit the pr3 pistons?

i dont think so considering they came on a b16 motor, just like the p30's...

p30's = 11.2:1
pr3's = 10.8:1

get the p30's

I know they both come from b16's the pr3 comes from the b16a2 sohc & the p30 comes from the b16a3 dohc. Just wanted to know.

I don't know about the 180 running the 403's. If you were running the 404's with a good tune then yes around 180ish. People say 404's are not drivable but with a good tune they can idle pretty damn close to stock.

I have a fully built all motor b18a tuned on hondata. With 403's with dvs I/H/E 68mm trottlebody ported and polished with aries pistons 12.1 comp. All I got 150hp and 121tq. Idles a 1100. 180 not likley.

really? I would get it re tuned cuz I got 148 whp with 9.5:1 comp pistons and stage 1 cams with bolt ons...obviously ur tuner isn't that good...no offence

It depends on the dyno. Throwing 180 to the wheel is different than throwing 180 to the crank.

i know that...all im saying is that you can definately get 180ish whp outta a good N/A ls build

That sounds like its been tuned conservatively. did you do a dyno before going all motor?

180whp is not out of the question, it all comes down to how well the tuner can get the most amount of power out of the aforementioned mods. but i would imagine with those mods 180 would be a walk in the park...