sup first time postin umm. im doin a b18c block wiff a b16a2 head. my internals r crower rods, 12.5:1 pistons, 3 layer headgasket and a block guard. my head internals are dual titanium crower valve springs, skunk2 valves, skunk2 stageIII cams, got the head PnP n 3 angle valve job. Got fuel reg, 320cc injectors, inline fuel pump, p28 comp with a hondata chip.
do u guys think this is a good reliable setup for daily driven? theres 94 pump gas my way.
wut do u guys think?
That set up is called a poorman’s ITR, Your compression will be high around 11.1 to 1. I wouldn’t use stage 3 Skunk cams on a daily driver.
i got 11.75:1 on this calculator: http://www.c-speedracing.com/howto/compcalc/compcalc.php
I don’t know if you have already installed the rods on the pistons, but in the event that you haven’t, they won’t fit without modification:
http://www.g2ic.com/forums/showthread.php?t=110101&highlight=aftermarket+rods+pistons
Actually, PCT pistons fit fine on B18C rods. Just know with the PCT pistons your compression will be closer to 12.6:1. The C-speed calculator doesn’t account for the .025" taller dome height of the PCT piston which instead of giving you .026" Piston to deck height (in the hole) with standard Type R pistons, you’ll be about -.006" out of the hole after decking the block. We just did this install on my brother’s Civic. We ended up using the Cometic .040" Head gasket to drop the compression to near 12:1. Here’s a shot of the pistons in the block.
Good post Dan. A lot of people are mis-informed about piston to deck height with CTR pistons because of cspeed’s site.
why not use the OEM head gasket and run with 12:6:1 compression?
i am thinking about putting these pistons in my b18cr, we have 98RON gas over here in N.Z which i think will be fine.
hey you know how the dome is higher etc, why don’t the valves hit the top of the piston if its higher.
I have been told u can’t run PCT pistons with agressive cams, is this true for the reasons of clearance
The pistons won’t hit (if your lucky) because the valve reliefs are just large enough to clear the valve face. Agressive cams have a more lift and may cause piston/valve contact.
In a built like this, claying your motor is essential.
why do people use pct pistons? i mean, they are the heaviest b series piston, big titties hinder flame travel, and, they raise the c.r. out of the roof. i mean since when is it necessary to run 12.6 c.r (stock bore, .025 oversized is a pussy hair short of 13.0/1 c.r.) to be fast? compression is overrated. frig, my boys race car is running 13.5/1 c.r. and makes 260whp all motor. what’s going on here? a good set up makes good power, not misinformation. that motor needs a race fuel mixture just to survive.
What would the compression ratio be for:
B18A Block with CTR pistons
LS headgasket
B16A Head
I was told about 12.3:1.
I was going to use the PCT pistons because they are DAMM cheap compared to any aftermarket pistons. i can get em for under the 250U.S mark
and isn’t high compression a good thing in a N.A car, running these in my car i figured id have a 12:6:1 comp ratio, and that shld survive on pump gas here as i know other b18’s runngi 12:5:1 pump gas doing 12.8 sec quarters etc, but yes they are running aggressive cams 
even if its too high i cld just put a thicker gasket in, but it won’t be.
why replace with stock b18cr pistons when i cld use pt pistons and gain more HP?
seems logical to me, if it puts out more hp who cares if they a little heavier, heck the b16b does well with em, and u can run a b18 crank and rods in that motor and it goes great
I dunno about that… 12.6:1 seems pretty high for pump gas to me. Unless you got some wicked high octane pump gas where you’re at. 
When i was into racing at this dirt track in Cali, we were running a 700hp 358ci small block pushing some where in the neighborhood of like 14:1 and that thing had to drink 116 octane. Having said that, compression isn’t the only factor that decides what octane the motor will require, but it does play a big part.
This is a pretty good FAQ explaining octane requirements and determining factors. It’s also part of an excellent FAQ about gasoline. It’s a pretty long read, but it contains a ton of useful information. [URL=http://www.faqs.org/faqs/autos/gasoline-faq/part3/section-1.html]
http://www.faqs.org/faqs/autos/gasoline-faq/part3/section-1.html
we have 91 96 and 98 RON gas in New Zealand where i live.
yeh i see some b16b motors with b18c crank and rods so making them 1800cc and therefore 12:6:1 and they run fine
I have personally driven my mates b18c running wiseco 12:5:1 comp pistons on pump gas, this thing flys and runs smooth as. has been for a long time now. was running a hondata computer but now a full link comp
Haha! Nice! 98 pump gas! California’s got 93 and Alaska’s only got 91.5.
yeh we have RON u have MON its different
your 93 is prob our 96
but our octane still higher hence me saying PCT pistons are a good for our country and 12:6:1 will be ok
what/where do pct pistons come from, i have never heard of them?
i dunno why but CTR b16b pistons are called pct pistons
