Now i have decided to go ctr pistons in my b16a and i have a couple of questions,?
1.) Should i use a thin head gasket, or is the compression high enough?
2.) I was planing to go with skunk2 cams stage 2, will i have any interference problems with the valves hitting the pistons

any advise on this setup would be greatly apreciated

thanks


[Modified by silverCRXTC, 8:26 PM 2/16/2003]

 

this is a set up im contemplating (pistons anyway) are there any mods needed to get the CTR pistons to fit in a b16a2?

 

The comp. will be plenty high enough. I must mix 50/50 110 race gas and 93 in my CRX with same setup. I am using a 94 Del Slow VTEC head gasket. As far as the cams??? Good question I don't beleive there would be a problem, but I don't know for sure. I am using CTR cams in my application. You will need to grind 1mm off each side of your stock b16 rods if you plan on using them with the CTR pistons.

 

I'm having the same concern:
My car set up B16A with CTR piston, Jun III, 2 thous milled. STILL BREAK IN.

As I've seen many B18C has CTR pistons and JUN III without any problem, I think it shouldn't be a problem with B16A, as B18C has more Piston-to-Deck Height so it should have more clearance than B16A.

 

b16a with ctrpistons should be around 11:1
if you are worried about piston-valve clearance you should clay it to be sure

 

That C/R ratio is kinda up in the air I've heard 11.1:1, and 12:1, and honestly I would have to say the latter of the 2 due to my inablity to run regular fuel. I only found one place that supports the 11.1:1 theory I beleive it was JDMHondaparts.com. Not sure though. Lots of resources say 12:1

 

its 11:1 in a b16a
12.25:1 in a b18c


this is why:
b16b has 10.8:1 and 1.6L stroke
b16a has a 1.6: stroke, but the compression height is a little higher on the ctr piston
so the compression goes from 10.8 to 11.0-11.1
in a b18 the stroke is much more so the compression goes up over 12.

 

The stupid garage didn't clay the engine who think he's smart enough there aren't any problem, has anyone has similar set up as me???

CTR pistons+JUNIII+B16A+1 layers head gasket????


[Modified by evo, 11:20 AM 2/17/2003]

 

I run 93 octane safely. B16a+CTR slugs+stock cams and head gasket. I'd love to have some S2 stage2s.

 

I forgot to mention B16a+ctr slugs+OEM headgasket=11.1 (previously stated). A 2 layer (mugen, modified OEM) headgasket will increase compression by.2. The Mugen HG is overpriced IMO.

 

How far can you adjust on the cam gear??

 

also should i bother with the .25mm oversized ctrs? how much is it to bore a block out, i cant find any shops right now, and honestly i doubt that little extra displacement make any difference

 

I would go with the OS PCT slugs.. I WILL NOT do a rebuild unless the the block has been bored over.. It just gives you the ability for the rings to seat better by getting rid of inperfections that may have developed over time... The extra displacement (~2cc's) is got going to do anything powerwise aswell as the ~0.05:1 increase in your C/R... As for headgaskets I only use OE, but that's just me.. When building boosted and big bore motors then i'm forced to go with Cometic but I have had problems with them not sealing as well... I'm sure you'll get the same problems with high compression headgaskets... If you wanna bump up you C/R higher than what PCT slugs will do then I would go with forged pistons... That's just my opinion tho... and i'm weird.. As for the gas, you'll be fine with ~11.0:1 on 91-93, I've told you all before so I'm sure you're sick of it but my friend's CRVTEC running JE 84.25 12.0:1 slugs, a Portflow head, RC 310's (which are too small, he's goin with 370s), CTR IN cam (GSR EX), SK2 cam gear and IN manifold, 60psi on the FPR, an ITR ECU, and VAFC.... never tuned on the dyno (only by feel it ran a 12.62@107 in his full interior EK)... Anyways on the street he can run 92 with 12 degrees of timing w/ NO detonation... As long as you're tuned correctly you should be fine... Sorry I went on but yea... I just got back from class and i'm bored.. hehehe.. Latez

 

look at this for the c/r
ff-squad.com/pistons.htm

 

how much should i expect to pay to bore it out the additions .25mm?

thanks