integra NA build

[vtir.dc2]

....well ive finally slowly started on whats been planned for ages. First off, introducing de car



Go the NZ NEW!!
Right now its got rims and adjusties, but apart from that its untouched




Ive got this b18c which was ripped from my SiR wreck.

whats planned:

basically, going to do a decent NA build with this engine, aiming for compression of about 12 or slightly lower, with a bit of work on the cylinder head. The Block will get bored out to fit 0.5 oversized CTR pistons and balanced too.

First off, the engine distmantling


off goes the rocker cover. next off goes the head.


and ive got this to replace it


another p72 head, reconditioned and stage III port & polish, thanks to Charlie (KTF racing).



New blox parts - ti retainers, dual valve springs, cam gears, HSL cams, fuel pressure regulator, thanks to Mac @ 41


new gaskets + seals from Honda


Still need to go get main and big end bearings, but have to see the colour of the ones in the block before i buy new ones. I didnt get a head gasket as not going with OEM, im going a bit thicker to be on the safer side with the VP clearance.

The block now needs to go in to get bored, honed and balanced but cannot until the oversized piston rings come which should be here in like a week and 1/2. thanks to peter (Riceboy) for the rings.

The head is ready to be assembled but i need to get hold of some valve spring compressors first.

Big thanks to Sean (nocert) who is helping me with this build, put in alot of effort.

thats all for now, sorry if it goes slow, am starting uni in less than 2 weeks so yea
Would really like any advice, info, pointers etc

cheers 8)

[nocert]

farrrk i beta come around and assemble you valvetrain tomorrow after work ae

[vtir.dc2]

valve spring compressor first man!!

[nocert]

ask around someone on here mite let us borrow one

[boobaabaa]

so you want high compression but yet you going for thicker head gasket

also 12.1 comp is not a street gas motor - good luck is all i can say

also the bearing cap size is stamped on the bottom of the block so check there first then match the colours - if they still on the shells that is

[BTLF3D]

Originally Posted by boobaabaa

so you want high compression but yet you going for thicker head gasket

also 12.1 comp is not a street gas motor - good luck is all i can say

wrong... i sold a set of 12.5:1 (if i remember rightly) to a guy on here building a b18cr, runs on 98 and is a street motor :wink:

[vtir.dc2]

indeed, 12 is fine with 98. but running a thick head gasket because:

1. like i said, its safer and there will be less risk of piston to valve contact. the head has been slightly skimmed so therefore theres more risk of piston to valve conatct and im countering that by a thick head gasket
2. with ctr pistons and slight skimming of the head, i estimate the compression at about 12.2, but i would rather run abit lower (about 12) as using pump gas its easier to tune when its a bit lower, therefore the thick head gasket to lower compression slightly.

[Coupe-R]

also 12.1 comp is not a street gas motor - good luck is all i can say

plenty of people run 12:1 and 12:5:1 on 98.
It all depends how much timing you can put it, or HAVE to take out so to speak.

Run a stock headgasket, use adjustable cam gears to obtain clearance. I am sure you could find out the clearance or just clay the motor/ or ask around with people who have similar setups.

So you have a B18C with CTR pistons and B18C head that gives 12.04CR with the c speed compression calculator provided no block or head skimming using stock headgasket.

It will be the cams that dictate clearance however you can change alot with the cam gears over a slighly thicker headgasket.


Someone chip in if I am off the mark here

[vtir.dc2]

probably true about the headgasket yea. might just run an OEM one. im only running stage 1 cams so there shouldnt be any problem with clearance

[Coupe-R]

run an OEM gasket

its not any HARDER to tune with more compression, sometimes you just have to take more timing out in areas to aviod knock. I hear CTR pistons are a bitch for it too.

heavy pistons with a massive ^ shape to them, not the best for flame travel so the yanks say.

I'm guessing knock would occur more easily in CTR's vs say CP's or wiseco's of the same compression. Also maybe more HP cause aftermarket is lighter.

CTR=cheap tho 8)

[vtir.dc2]

ok. OEM it is

[b_series_power]

its only a little bit more for wiseco pistons anyway.. id rather forged for a peice of mind imo

[Coupe-R]

depends what sort of deal you get.

personally if I had my bottem end in pieces and was staying N.A I'd go high comp aftermarket.

Its not so much piece of mind unless running BIG power N.A its more the power benefits you would get from aftermarket. Lighter and possibly better air/fuel mix also more clearance I guess

[b_series_power]

Originally Posted by Coupe-R

depends what sort of deal you get.

personally if I had my bottem end in pieces and was staying N.A I'd go high comp aftermarket.

Its not so much piece of mind unless running BIG power N.A its more the power benefits you would get from aftermarket. Lighter and possibly better air/fuel mix also more clearance I guess

well yeah it depends on how much power you want or how high you want to rev. if oyu goen to get big cams and massive porting your'd want to go forged to make use of the head work..

[Genkei]

there is way u can improve on the PCT pistons

if those b16b can take on 200kw+ turbo as it is
150kw NA cant really hurt it or will it ?

[vtir.dc2]

the b16b pistons wil be fine!! i cant see the engine making over 145 or 150kw, or reving too high, so there algud, theyl do the job.

[Coupe-R]

correct

its not that the pistons can't and won't do the job even with BIG power.

its the fact the yanks claim they don't make as much power as an aftermarket item, because of piston shape flame travel, heavy piston etc.

Of course they can make power, just like a factory B18C bottem end can make over 200kw boosted

[vtir.dc2]

update...raced home from uni, checked the mailbox, rings where there :thumbsup: :thumbsup:

chucked the block in the SUV and ran it down to the machinists in drury.

Thinking about the exhaust, not too sure what to go with. stainless or mild, 2.25 or 2.5....

I want something that will give pretty decent power gains, not very loud (can be on vtec tho!!) and sounds abit nice, not that damn big bore sound! i wana hear that vtec roar. Obviously i cant have performance AND sound, so performance matters more than sound to me. give me some ideas

[Hayce]

Originally Posted by b_series_power

well yeah it depends on how much power you want or how high you want to rev. if oyu goen to get big cams and massive porting your'd want to go forged to make use of the head work..

Where do you get this from?

Stock pistons are going to rev just fine.
Forged pistons are not going to allow you to make use of the head work. The only usable advantage I think would be due to the fact that they would be balanced.

NA people get forged pistons more often than not because they are lighter, or to increase the CR. Theres not going to be a horrendous increase on the ring lands (one of the reasons for forged pistons in a turbo).

As some one else stated stock pistons are in a number of cars running 170wkw and up with around 550nm tq they'll handle na...

[bmgjet]

Stainless 2.25 straight through. Just make sure not to rev over 3G while in town lol.

Thats pritty much what I have but mine just normal exhaust not stainless and iv got a hollowed out coby on the end that makes no difference when its on or off lol but just keeps the police happy when I get pulled over.

[ef_eg]

Don't forget to consider the new dB laws coming in before getting your exhaust! Now's the time to get it right.

[b16a2]

Originally Posted by boobaabaa

also 12.1 comp is not a street gas motor - good luck is all i can say

s2k nearly running 12 comp from factory 11.7:1

[b16a2]

2.5" stainless system :thumbsup: cant go wrong with the tried and tested

[vtir.dc2]

hmm...
resos - 1? 2?
and muffler? as unrestrictive as poss, still would like a fairly nice sound tho haha.
Those N1's/canon style mufflers - with 2 resos, would it be very loud as i know the n1s are pretty loud.

yea and with teh new laws, does it have to be under 90db to get a cert? or is it 95

[Moclov]

Originally Posted by b16a2

s2k nearly running 12 comp from factory 11.7:1

Yup, most DOHC VTEC engines are above 11:1 factory aren't they?