Hey guys, im getting ready to do a build my bottom end for boost. Tell me what you guys think.
I have a b18c in my eg.
81mm Cp piston(9.8:1)
Eagle H beam rods(cuz there cheap) Or maybe manely h beam
ACL main bearings
Cometic head gasket 81mm(what thickness do you guys rec for this turbo set up)

and the head ima leave stock right now prob going to do a b16 head

 

i would go with 81.5mm just so you can clean up the walls.

 

More info, turbo setup? Power goals? Purpose of the car, street, strip etc?

 

i would go with OEM honda bearings and oem headgasket

 

yea i was thinkin about that but i was gonna just do it at my friends house and get it over with. how much do you think it would cost to bore it .5 bigger. if i was gonna bore it i was think if doin somethin like 82 or 83mm.

 

well its going to be my street car that i would drag once in a while, not too much. i would like to be running somewhere in the 11-12s with a decent t3t4ballbearing turbo. I would deff be drivin with out the turbo 4 a lil while so i can break in the motor and save up for boost.

 

Why oem? when i can get good aftermarket bearings and gasket. Whats wrong with acl bearings and cometic head gasket? anyone?

 

ACL is great if your bearing clearances are equal to the ACL thickness. Otherwise Honda will have the right bearing thickness for all your clearances. Both are great, but the bearing clearances are essential to a great build.

The OEM headgasket is known to be reliable.

You shouldn't really go bigger than 81.5 with stock sleeves. If you want bigger bore then get new sleeves. Check the bore once you open the motor and see if the cylinders are clean and your fingernail doesn't catch any of the grooves. I would deglaze the cylinders for the new rings, rebuild, tune, and have fun.

 

My Cometic .052" headgasket is good so far. No overheating or anything, whatsoever, even with the block guard.

^ what he said, clearances are critical. A good hone job will ensure proper ring seating.

 

if i run theses 9.8:1 cp pistons and the .o52 cometic HG what you guys think the compression would be. you guys think this would be a good set up.

 

http://www.c-speedracing.com/howto/c...c/compcalc.php

input your info here^^^

 

And staying 9.8:1 is fine. This is why the OEM headgasket was recommended. Just because it is aftermarket, doesn't mean its "better". Especially when you're talking about a Honda. Just one to grow on.

 

I know man but i herd alot of good things about comectic HG thats i just wanted other ppl opinion

 

~9.3:1 If I remember correctly............

 

If my memory serves me correclty every .02" is .5 cr. So stock hg is ~.031", the .052" adds .02" which reduces the cr by .5

 

thanks alot buddy that info helped alot