How does the B16B EK9's intake manifold compare to the ITR B18C one?


Vtec6000 said:
Any gains to be got from using a b18c i.m on a b16a? Seen it done before so am curious to know is it worth while.
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I think in conjunction with breathing mods and cams definetely since your engine will want more air. Only breathing mods I would reckon too. But I'm pretty sure you will need a good tune to get the most out of it.
 
How can you be sure you are not using a B16A head?

So basically, how can you tell the head is from a B18C and not a B16A to make sure they have not been swapped over..as they share the same cast?

If you look at my picture above, that nipple is from my B16B intake, but my B18C intake does not have this..and they are supposed to be the same?
 
We'll say it again.

B16B and B18C IM has the same part number, meaning same parts. Only difference is the Throttle Body being 2mm bigger with B18C.

B16a IM is totally different and physically obvious in design.
 
Gee said:
How can you be sure you are not using a B16A head?

So basically, how can you tell the head is from a B18C and not a B16A to make sure they have not been swapped over..as they share the same cast?

If you look at my picture above, that nipple is from my B16B intake, but my B18C intake does not have this..and they are supposed to be the same?
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Your IM could have been an aftermarket Type R copy. I know a few US companies that make them.
 
jugbugz said:
Your IM could have been an aftermarket Type R copy. I know a few US companies that make them.
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I have seen pictures of other inlet manifolds from a B18C and they look the same as the one I got with the B18C.

The picture I posted it from my B16B.

So I dont see how they can be the exact same part number.
 
Gee said:
I have seen pictures of other inlet manifolds from a B18C and they look the same as the one I got with the B18C.

The picture I posted it from my B16B.

So I dont see how they can be the exact same part number.
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Ive asked honda japan last time about 98spec, they are same.

Unless the 96spec B18c IM is different.
 
Possibly, because they are 100% not the same.

Probably used from 98 onwards.
 
Gee said:
If they are the same part numbers, why was a left with one pipe left over from the swap?

There is a vacumm pipe os something left over, the B18C manifold had one less inlet pipe?

This one here was not on my B18C manifold:

Inlet-1.jpg
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so if it has this pipe, it's from the ek9. otherwise the IM is from a dc2.

I'm curious if there's any difference between a 96 and 98 spec b18c IM. maybe one of them has the same pipe like that of the b16b.
 
On this topic, ive been told that the ITR intake manifold is good to use on my B16A2 engine, and its probably better than some aftermarket ones. Is this true and can I just bolt it on and away I go?

This may be an option for me if I can do it, but dont want to have to go about changing loads of different things to get it to work.

Ive searched, and it brought me to this topic.

Ben
 
1.The throttle body sizing and dimentions are identical for the B16A and B16B

2.You can fit/use a B16A manifold on a B18C but you may loose out on a bit of hp in the higher revs but gain a lil in the lower

The type R manifold is a modified design of the B16A's one, where it has shorter runers but a slightly bigger plenum to help air flow in the higher RPM with the type R cams.

The std B16B has the same throttle body as the B16A because it doesnt quite need the same volume of air as the B18C so to keep the optimum velocity through the intake it uses a smaller Throttle body.

In theory if you use the B16A manifold with a the B18C throttle body the engine will feel more responsive and drivable around town and back roads out of vtec but you will loose out in the higher RPM.

At the moment im using a B16A intake on my JDM B18C an those theorys seem to show on mine compared to my mates with the type R manifold

And im pritty sure the B16B and B18C manifolds are the same but one has different vacum pipe witch would have been added after the casting in the production line.
 
KieranEG6 said:
1.The throttle body sizing and dimentions are identical for the B16A and B16B

2.You can fit/use a B16A manifold on a B18C but you may loose out on a bit of hp in the higher revs but gain a lil in the lower

The type R manifold is a modified design of the B16A's one, where it has shorter runers but a slightly bigger plenum to help air flow in the higher RPM with the type R cams.

The std B16B has the same throttle body as the B16A because it doesnt quite need the same volume of air as the B18C so to keep the optimum velocity through the intake it uses a smaller Throttle body.

In theory if you use the B16A manifold with a the B18C throttle body the engine will feel more responsive and drivable around town and back roads out of vtec but you will loose out in the higher RPM.

At the moment im using a B16A intake on my JDM B18C an those theorys seem to show on mine compared to my mates with the type R manifold

And im pritty sure the B16B and B18C manifolds are the same but one has different vacum pipe witch would have been added after the casting in the production line.
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Hello. Your post was very interesting to me.

I have a Ek track car with a JDM B18C, Hondata, 4-1 header, open exhaust and I run it in a track with a main straight with less than a mile long. I could find out that in the higher revs (above 8400) the car loses power.

I have a B16 intake manifold, and after reading your post I began to think that swapping it may give me more torque in the lower end.

Did you find a significant loss of hps after the swap?

Thanks a lot!
 
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