darkintegra

Trying to find a good piston for high compression with a tight budget.Heard a lot of good things about YCP pistons in the D series community but has anyone had any experience with these pistons on a B20/vtec?Which one you guys prefer?I havent heard much about RS Machine pistons

patriot

iTrader: (2)

You haven't been around here much lately then. RSMachine is pretty much the way to go if you don't want or can't afford forged pistons.
RS FTW

H9Omega

maybe someone with experience on both?

darkintegra

^ Any particular reason why RSMachine is the way to go?

powerfulperformance

iTrader: (1)

I had experience with both. Built 2 b20, 1 gsr with the rs pistons and put over 5k miles so far with no problems. Also built a gsr with ycp pistons and the kid had no problems with his car...

darkintegra

^ 5k. Still a new born to tell if they will hold.Anyone else with more xp?

powerfulperformance

iTrader: (1)

lol...

Furyof4

The only downside I see about the ycp's is that they only come in stock 84mm and 85mm. So you either need to use old bores or bore to the limit. Rs machines come in 84.5 so you can have a fresh bore and a little more strength/room to grow.

DC_T

anybody else have experience with both and prefer one over the other?

blinx9900

I have had great success with nippon pistons, honestly though i think either would be fine...

egb18c5

rs machines are flooded all over H-T. all the way up to 240whp+

do some searching, havent heard of any complaints. they're probably one of the best bang for the buck pieces out there

precisionsc54

How many miles do you have on them? Whats your setup

blinx9900

340whp boosted b16a block with b16b head, not exactly NA but I am plenty confidant if they can survive my setup they can survive any NA setup, i run crap 91 octane, i constantly bounce off the 9000rpm rev limiter and my idea of engine break is "wtf is break in hurry and tune my **** so i can drive!"

Its not a daily so sadly i have only 1500 miles on the engine but believe me when i say they are all rape miles done either racing or tuning, i went through 7 full tanks of gas before it even had 400 miles on it

Also worth noting is the nippon pistons where kind of the big thing before RS got popular, most of people running itr/ctr pistons actually have nippon pistons, mine happen to be the pr4 ones for obvious reasons.

mar778c

iTrader: (1)

I've run RS pistons for a while. I'm approaching 35K+ MILES. The motor consistantly puts down SAE 197~199 whp. They are a very good piston for less than $150.

mec. pedri

iTrader: (1)

ycp all day!!!

b20vtech

RS more reputable in B-series
YCP just barely herd of em -give it a try and report back for the H-T community!!

blinx9900

YCP has been out for a long time... Also worth noting is:

YCP=Made in China
Nippon=Made in Japan

bigG

iTrader: (6)

ycp is made out of a higher grade aluminum just like vitaras just to let every1 know

BoostKiller

i used rs's many times my b16 with rs machine is been running like a champ for as long as i can remember

redsolturbo

b20 vtec.
ycp itr spec pistons + npr rings.

put them in over 8 months ago. NO problems.

would have gone with r.s machines but there were having mad shortages of 84mm units at the time. see very good reports of the turbo units on d-series.org and homemadeturbo, some running over well 300whp on the vitara (ycp/nippon) pistons! also they are MUCH MUCH cheaper than the r.s machine units. i got mine i think for around $200 form some guy on ebay in brazil (forget his name, he did/does have an account on here, ??fujtomi?? or somthing?)

i went with ycp over nippon, last set i saw broke apart and ruined someones b16a. nothing is bullet proof and there will ALWAYS be a bad unit out of X/Y/Z made.

either will be fine as long as its built correctly.

jdong

correct

jdong

I been using ycp+ npr rings for all the engine i build, since 95 i have no problem with them. But i heard good thing about rs machine too.

EGhatch87

I've used RS in 3 motors with no problems...good stuff

vanny_david

question for all engine builders

where did you get the spec clearance and gap for 84.5mm RS pistons?

Thanks,

egb18c5

if you have to ask rs machines themselves