OK guys my b16a engine is completely apart at a tuner shop near my house, I am getting this engine completely redone. I have the jdm 2000 ITR valve train/cams/gears, they ported and polished the head and its milled 20thousands or something. The mechanic recomended that I throw in some ctr pistons in place of the stock ones … I’ve read that this combo would result in some problems… supposedly the ctr pistons have the highest dome on them… and some ‘vavle slapping’ could occur. Has anyone gone this route? is this safe?
i’m not sure about the valves tapping the pistons, but the compression is gonna be fairly high. the ctr pistons in the b16a will give you 11.1:1 compression, since you’re milled ist gonna be even higher.
Oh man thats nuts… the milled head is supposed to raise it .5… what grade fuel will I have to run… is this too high to drive everyday?
thats definitely too high to run on the premuim octane here in cali (91 and 92 octane). Some parts of the country have higher octanes, but still, I don’t think it’ll work well with any premium fuel out there. Chances are you’ll have to retard your timing a good deal, and maybe run octane booster. Again, i’m not really familiar with that high of a compression though. I don’t think anyone here at g2ic runs anything like that.
What shop are you having the work done at? For the ripoff price of premium gas in NYC , it may not be worth it IF you can even run premium without detonation. Nut not on a milled head. Better go with some itr or custom spec slugs instead.
IMP in clifton… the prices of gas aren’t too bad… you hsould go else where and compare… actually NJ has some of the lowest gas prices because we refine all of the oil and have a break on gas taxes… conneticut is like 10-20 cents more!! ouch
Why do you have to mill the head? Your CR will be plenty high with the CTR slugs.
{edit} I re-read your post and saw that the head’s already been milled. Use P73-00 (JDM ITR) pistons.
Thats what I had told the tuner to do… but he insisted that the ctr pistons would be excellent. I told the dude that I would be driving this everyday and I want it to be able to run on 91- 93 octane. He said it would be no problem… This shop makes race engines and has been around for 20yrs… still I am starting to feel like they might be trying to pull my chain a bit…
hey remember u the customer…ctr are kinda wild pistons …be safe … i’m sure they won’t give u much of a warranty anyway … beside after a pistonslap the motor has to come apart again …USDM ITR and u will be much impressed …now maybe if u didn’t mill…
yeah … I still have a day to tell them not too tho… ITR then?
If you don’t mill I’d go ahead with the CTR. If you mill, go JDM ITR.
Well its complete and it runs great with a 11 to 1 compression… making 214hp at the wheels took it for a 2hr run and I am blown away at the power it makes … 93 octane is just running peachy… dyno chart coming wed after final tuning is done… here is the list of mods
90 GS
1st gen b16a
2000 jdm itr vavle train, cams, toda ajustable cam gears
ported head, 20k milled, 3 angle valve job etc
ITr intake mani, 94 b18 rail, 64mm bored bbk tb
CTR pistons, shot peaned rods, balanced crank
Mugen N1 race ecu retuned (rev limit set at 9000rpm)
Aem cold intake
321 obx header, custom midpipe, focuz exhuast
weeheee see ya at the tracks
214whp out of a naturally aspirated b16a!?!?! i’d like to see those dyno charts, my guess is that that dyno is off by quite a bit.
i don’t see how that is even close to possible with what you’ve said you have. just for a quick comparison, dan’s setup:
approx 200-210whp
-b18c1 block w/ jdm itr internals
-11.1:1 compression
-toda spec b cams w/ upgraded valvetrain
-portflow port/polish itr head
-itr intake manifold and tb
-jun header
-intake, exhaust, ecu, etc, etc…
if that setup is only running a bit over 200whp, then how the hell are you running more hp, with .2 liters less displacement, much weaker cams, and only .4 more compression? Correct me if i’m missing some other serious power adding mods, cause how i’m looking at it now it just doesn’t add up.
How high does his engine rev too? what ecu? does he have solid retainers? I doubt he is reving up as high as mine…
he now has the rev limiter at 9500 rpms if i remember correctly.
His ecu is a custom program which was specifically tuned for toda spec b cams.
his engine is pretty much fully built. check his profile in the member section, name: DAN. His profile isnt current, but you can get the idea from it.
I’ve only seen one b16a that was over 210 hp before and i’m not even sure if i believed the guy who was telling me. But either way, it was a full race engine, definitely not something that was streetable or would run on pump gas.
I could be wrong here. but i’ve just never heard of anything like you’re explaining. if you’re really running over 200whp with a b16a and basically only oem honda parts then why aren’t more people doing it that way?
perhaps they again are pulling my chain… unless they meant at the flywheel and told me at the wheels… I personally was expecting around 170-180 or so at the wheels based on my friends’ experiences with similar setups. Although I am running slighly higher compression. But hey tomorrow I will see for my own eyes whats really being put out… thing friggin flys tho :)
The number could be at the flywheel. If you figure in 15-20% drivetrain loss, 214bhp translates to around 175whp. Not really that unreasonable.
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Tsou
Originally posted by 91IntegGS
214whp out of a naturally aspirated b16a!?!?! i’d like to see those dyno charts, my guess is that that dyno is off by quite a bit.
i don’t see how that is even close to possible with what you’ve said you have. just for a quick comparison, dan’s setup:
That’s with JUN Type 2 cams but stock compression. 214 is probably the crank hp. Still, that’s damn good out of a 1.6-liter engine!
yeah 170-180whp is a lot more like what i would have expected your setup to run. and like fatbooty said, thats still a damn lot out of a 1.6 liter!!
so, the 11.5:1 compression runs fine off 93 octane, any idea what your timing is set at?
i still need to figure out how high CR i can run on 91 octane at stock 16deg btdc
I’m sure they meant crank hp. You would almost need an ITB setup (not street legal) to get a B16A to put out that kind of power. And definitely some more agressive cams (Toda, Spoon, JUN). Please share your dyno numbers when you get them. And also, please share what they did to the tops of the pistons or to the head to get the MASSIVE PCT/CTR pistons to fit. I know they sit high on the deck of the B16A block. The JDM B16B uses a B18C block with B16A crank and B16A rods. The significance of this is that the block is 7mm taller than the B16A block. I’m sure you see the significance. Good to see you got your car back. Later.