jdm xsi

Hey guys, I have a 1st gen JDM B16a with the usual upgrades (I,H,E), I was wondering would it be safe to use a pair of ITR cams on a stock b16 valvetrain and see noticeable gains in power? Also what would be the advantages and disadvantages to using these cams?

boostjunkie33

use the intake cam only unless you plan on swapping out the single exhaust valve springs forthe itr dual setup. personally i don't think the exhaust is worth the trouble as it's the intake cam that make good gains (6-7 whp) by itself. gl

jdm xsi

Thanks man. So it is possible to use only the intake cam? What worries me is detonation. I heard from a few friends that if the itr cams are not properly used on a stock b16 valve train and you go pass the stock red line of the b16a it can cause detonation. Is this true?
Also for the sake of it I was wondering what would be the best bang for the buck. I can get an ITR intake manifold and header and I have access to a ITR valve train. I was thinking the effects would be the same with the header and IM compared to the ITR valvetrain. What do you think?

import_pr0

I put them in a 98 usdm gsr and found the vtec hits much harder so it should be a major improvement in a b16a

jdm xsi

Very nice. Did you loose torque at all?

F8i

iTrader: (10)

I would do the swap. However, liked mentioned before, you would need to change your springs/retainers. It's do it though, maybe google: the poor mans ITR.
It will allow you to rev a little further, if I'm nnot mistaken. Spoon has a B16B video, a Spoon B16B vs. a Normal B16B.
-B

jdm xsi

thanks man I'll research that and see what I find and let you guys know.

jdm xsi

Hey guys so I did some research and I cannot find anything interesting. So you guys think the ITR valve train and cams would be the best bang for the buck for power? Take into mind that the IM and header on the car currently is stock(1st gen b16. If I change the entire valve train is there anything I would have to take into consideration? Like will there be any disadvantages? I know the stock ecu would only allow me to rev so high...

MPR

You will have to tune the engine. You can't leave it with the stock tune. Also, the stock b16 intake manifolds are actually very good and flow very well. A good header with 2.5" collector and full 2.5" exhaust will help along with a slightly larger throttle body. You may have to port the intake manifold a bit to match the larger tb.

jdm xsi

Thanks man. Okay so its best to stick with the stock IM but port it a bit to increase the flow. Okay that sounds much better. The original Post was what do you think would be the best bang for the buck the ITR intake manifold and header or the full ITR valve train. That was what was really confusing me bro. One person said the valve train but I'm wondering what would be best? More suggestions would be appreciated please guys.

F8i

iTrader: (10)

Stock ECU will govern you to stock settings.
I wouldn't say best bang for buck, but a neat setup.
Change your header for something aftermarket.
I'm using an Edlebrock Intake, it has a bad angle, and won't allow much room for install. I do recommend, eventually, up grading your Intake manifold, but not right away. Maybe cheap out for now and get a better Throttle Body, and cold air.

Maybe try a lightend flywheel for a cheap upgrade.

jdm xsi

Excellent Idea, would a stock ITR flywheel from a Hydro clutch fit in a cable tranny? I have been hearing that the dimensions are slightly different.

F8i

iTrader: (10)

The fly wheel fits, the clutch does not. So I'm told.
When I bought my CRX it had an exedy Stage 1, stock fly. The Stage one was from a Hydro, worked fine. However, when I bought the crx the tranmission was locked in 5th. But I thought if it wasn't going to work, it wouldn't fit, not brake the tranny... though to say.

I don't remember the word for them, but the Hydro have a different number of 'sprockets'? I believe the Hydro have more.
So, look for a Cable clutch kit. Or maybe call someone with more information. Zeeman would probably know. Maybe call his shop.
-B

zeeman

iTrader: (1)

depends on which cable tranny you have.

the 88-91 has 22 teeth on the spline
the 92-93 has 24 teeth on the spline

All hydro trannys have 24 teeth on the spline.

zeeman

iTrader: (1)

you'll be fine with the stock valvetrain as long as you don't go over the stock rev limit (8200rpms), what will happen is you'll get valve float where the valve spring just bounces around not controlling the valve properly, this could lead to the pistons smashing the valves.

With the stock b16 intake manifold the power typically peaks around 7600-7800rpms anyways, so there is no point going past the stock rev limit.

I'd use both the intake and exhaust cams from the ITR as i've done this many times now without any issues (as long as you don't rev past 8200rpms).

Now changing the cams (even just to ITR's) will require you to get the car tuned. This isn't just for the sake of making the most power, its also for the safety factor. Any time you change the cams you NEED to tune the car. If you are changing how much/when the air enters/exits the engine, you need to change how much fuel is being delivered and when the spark will fire (ignition timing), this is done by tuning.

jdm xsi

Thanks for the useful Info Zeeman. Definitely answered my question and I have decided to get the whole valvetrain. I have the cable tranny from a 1990 b16 xsi ( which would be 22 spline). Would the 95 nd up type r flywheel fit on that perfectly without any issues?

zeeman

iTrader: (1)

the flywheel will fit.

The flywheel has nothing to do with the tranny really. It bolts up to the engine, then the pressure plate bolts up to it.

The only thing that actually goes on the tranny is the clutch disk, as it rides on the input shaft splines. This is what you need to match to your tranny.

jdm xsi

Okay thats beginning to makes sense to me now.One more thing would an ACT clutch disk out of a itr fit in this b16 tranny if I use the stock pressure plate and bought a new release bearing for it?

zeeman

iTrader: (1)

no b/c the ITR clutch disk is 24 teeth and your tranny is 22 teeth.

you need a 22 teeth clutch disk

boostjunkie33

the itr manifold/throttle body is a great swap but i found that you lose a bit of bottom end to gain up top. b16s are torque challenged from the start so taking away from them even more in my eyes is a bad idea. Actually i sold mine and reinstalled my stock manifold not that long ago. I had an itr intake cam installed and it make quite the difference on high cam. If you can get all the parts for cheap then why the hell not. if you don't like it you can always flip itr parts easily. i have now switched to a ctr cams which has a few more degrees duration on the intake side.