this is a b16a with ctr piston, P&P head, skunk2 stage 2 cams, springs, retainers, itr header, skunk2 IM and throttle body.

c-speedracing says its 10.9 to 1 but Zeaworks or something like that say its 11.9 to 1.

and are b16b and b16a rod bearings and main bearing the same?

i'm buildin the motor but ran into c-speed calutalor, i don't think it s correct. please help! i have searched but nothins straight forward.

 

i would also like the answer to this

i have a similar setup but the only diff. is a gsr head with the same bolt ons

 

I would have to say that the Zealworks calculator is full of sh#t. Go with the c-speed racing calculator. The b16 has a little a$$ stroke. Where talkin' nearly one fifth of a liter difference here from the B18.

I was personally considering going with the CTR pistons before I install my b16 into my integra. On top of this, you could put a thinner head gasket on there and achieve nearly 11.3 CR. Throw some cams into the mix (pay close attention to valve to piston clearance), header, 93 octane, and valve springs, then you should have a pretty stout a$$ b16.

Hope this helps!

 

with a gsr head and b16 block its 11.1

 

STOP IT! Please research this a little more before you post. Neither of you know what you are talkin about. This has been covered 100 times. SEARCH

The compression height is different on the ctr's. Zealautoworks maybe off a little but its more accurate then cspeed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Furyof4 &raquo;</TD></TR><TR><TD CLASS="quote">STOP IT! Please research this a little more before you post. Neither of you know what you are talkin about. This has been covered 100 times. SEARCH

The compression height is different on the ctr's. Zealautoworks maybe off a little but its more accurate then cspeed.</TD></TR></TABLE>

look i researched befor i started this thread no one is straight on the answer. most compression calculators say 11.5-11.9. i want to be sure. because i'm orderin the ctr pistons very soon the block, and head are finished and ready to be put together. i know to research before postin so if u know a link that would help me out i would be thankful.

 

I was mostly talkin to the guys posting answers above.

Omnimans thread about it, allthough I see all his posts are deleted.
https://honda-tech.com/zerothread?id=717928&page=2

Copied from the thread:

PR3 head/B16 Block

STD = 11.643438609136867
.25 OS = 11.703231023151065

PR3 head/B17 Block

STD = 12.193487116069006
.25 OS = 12.256369577319077

PR3 head/B18C Block

STD = 12.58636786521145
.25 OS = 12.649248792586258

P72 head/B18C Block

STD = 12.924594026551906
.25 OS = 12.989047869209281

PR3 head/B18A/B Block

STD = 12.825536009218106
.25 OS = 12.88971493738735

P72 head/B18A/B Block

STD = 13.170743903246784
.25 OS = 13.236528215133324

All calculated using OEM 3 layer gasket @ .026 and the compression height provided by Omniman

 

wow thanks! thats great, i'm goin with os ctr pistons. me and my buddy have the same set up but he has a ls block with itr pistons. he has way more torque but, his bottom end isn't balanced at all. my crank, rods, pistons, and flywheel are goin to be balanced to the best i can. my dads machine shop is open to me and i have done all the machine work. this is my first build so i hope it turns out good. i just want a monster of a motor. i think turning 9500rmps wont be a problem!

thanks a bunch!

 

I feel like such a dumb ***. Thanks for correcting me. I can't stand giving someone bad info. Sorry!

Anyhow, since I know this new info., I can therefore put the CTR pistons in my B16a 1st gen motor. My motor is the JDM PR3 engine from the OBD0 Xsi. However, I think that I read in one of the posts made in that linked thread that the CTR pistons create zero (0, nada, none, zip, limit goes to zero, non, nun, etc) piston-to-deck clearance. Is this true? or did the thread say that the piston would stick up out of the bore slightly?

11.6 CR in a b16 would be great, then again, valve-to-piston clearance would be extremely tight with CTR cams.

??????????

 

Well??????????

 

Use OEM head gaskit,

compression will be 11.5 to 11.9.

 

How about valve to piston clearance with type r cams??????

And will the piston stick up out of the bore any like i've seen on some posts????????? Or will it have zero piston to deck clearance??????

 

My ctr's stick out of the block 0.015" and my p-v clearance was acceptable (had some room to play with the gears) with bc3+. Every setup will be different though so be sure you check.

 

how about F#ck you were trying to give this guy answers.

 

i have heard sk2 stage 2 will work but i would call sk2 and ask about clearance. i know itr pistons and stage 2 sk2's work! i want to use sk2 stage 2 cams, but i hope its not an issue. well any compression over 11.0 i'm happy with, i just hope it wont hurt the motor going 200 miles to get it tuned. the nearest place is in tulsa, ok and i well be running a shock fuel system with a 255 fuel pump. i'm chippin my stock obdo pr3 with BRE and a dyno. should i be worried? or is it wiser to put my crx on a tailor and pull it down there!

thanks for all the help

 

convert it to obd1 its much easy'r but BRE is a nice program i use it every now and then
i like obd1 cuz crome rocks! seriously

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by si90rex &raquo;</TD></TR><TR><TD CLASS="quote">

and are b16b and b16a rod bearings and main bearing the same?
</TD></TR></TABLE>
just curious but why you asking this question?

B16B and B16A rod bearings are DIFFERENT... the main bearings are the same though...

there was a post a while back of someone comparing a B16A and B16B cranks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FaceTuned &raquo;</TD></TR><TR><TD CLASS="quote">how about F#ck you were trying to give this guy answers.</TD></TR></TABLE>

Helping him with wrong information?

 

i have ctr pistons in my b16a2 and it runs fine on 91 octane, and in fact, for my setup, runs best with the stock fuel components. just run a wideband to be safe and make sure the a/f ratio is cool. you might need an adjustable fpr to help with that.