Would DC2R head be good with 11.9 compression?

[tinkerbell]

it says 11.75:1 here:

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

[tinkerbell]

and says 12.05:1 here:

http://www.bojangs.com/calculator/

[tinkerbell]

and says 12.75:1 here:

http://www.zealautowerks.com/

[tofuR]

yeah the calculators are a bit iffy
because some of the e.g. the cspeed racing .. doesnt take into account the extra height of the PCT piston ..
im pretty sure that the comp ratio is in the vicinity of 12.3 -12.5
by dropping a set of b16b pistons into an itr block .. all other things equal ..

[BlitZ]

I have no direct hands on experience, but B16B pistons do seem a frequent upgrade for B18c5 owners in the US on h-t.com, with decent results. Seems a fairly cheap and safe way to up compression, if you listen to tinkerbell and check for piston to valve clearance.

true, however the b18c5 is a step behind b18c7 in terms of piston height,..

piston to valve clearance shouldnt be much of an issue..
nevertheless it will be checked as you would always do when having installing non orginal internals.

[BlitZ]

Oh crap.. that a big bloody difference b/w calculators.. hmzszs...

[tofuR]

calculate it yourself =)

stolen from HT

Compression ratio: Volume of the cylinder, piston dish and head dish and
headgasket from top to bottom of the stroke, divided by the head, piston,
and headgasket volume or:

bore(in.) x bore(in.) =__ x .7854 =__ x stroke (in.) =__/ .061=__cc of
cylinder + (head cc +piston cc + headgasket cc) / (head cc+ piston
cc+headgasket cc) = compression ratio

[tofuR]

where u getting your engine work done danny?
u doing oversized ctr pistons ? .25 oversize?

suddenly so loaded u biatch =p

[BlitZ]

where u getting your engine work done danny?
u doing oversized ctr pistons ? .25 oversize?

suddenly so loaded u biatch =p

Mates im poor like a mofo..

Everything in contemplation

Cant eat lunch anymore.. loosing weight for weight reduction ..

[tofuR]

hehe contemplation?

well if u r planning to get ctr pistons
definitely go oversize and have the block honed
or else you may have major issues afterwards..
the rings wont seal
u will lose comp, burn oil
blah blh blah

[tofuR]

just for future reference.. and for the guys who are less techy..
the stock b18/b16 bore is 81mm
if u go oversize u get a 81.25 ctr oversize piston and bore your block out to 81.25 to match ..

that way u get a fresh seal =)

[BlitZ]

hehe contemplation?

well if u r planning to get ctr pistons
definitely go oversize and have the block honed
or else you may have major issues afterwards..
the rings wont seal
u will lose comp, burn oil
blah blh blah

True...

But im planning to get it hand honed as required.. and nothing over std bore... makes me think... now

[jonnieR]

BlitZ - ur name doesnt happen to be Steve is it?

[tofuR]

Jonnie,
its danny
the black em1 coupe that used to chase us around OP
with gf in his passenger seat =P

[BlitZ]

Jonnie,
its danny
the black em1 coupe that used to chase us around OP
with gf in his passenger seat =P

ahahha

Hey JonnieR,
Are you the guy in the black DC5R around op ehehe.. AZ's friend...

remember chasing the black R... dont remember no Tofu R