I have a b18c motor now but am thinking about swapping on a b16 head. Can I use the gs-r ecu or should I put the b16 ecu in it...??

 

That's fine. I have the same set-up.

Put pr3 pistons in your block higher CM 11:2.

 

You can use either ecu.
Thing is, the GSR ecu is mapped for a 1.8L engine and the B16A ecu is mapped for 1.6. That shouldn't be a problem though, either ecu will run a B18C+B16A head AKA 'poorman's ITR engine'. You can always have either ecu reprogrammed with a good race program, ie. mugen. On that note, for some nifty reason, that mugen program works real good on any B-series liter... from 1.6-2.0 (maybe even higher !) w/single butterfly intake manifold. It's dyno proven about 6-8hp too.

In favor of what g'sinteg mentioned..
its a good idea to upgrade the GSR's pistons to something with more 'umph', such as B16A or ITR pistons. But lemme ask this:

Are you planning to turbo charge or stay naturally aspirated with your engine?

I ask this because, when you put a stock B16A head on a stock (US) GSR block the compression will be lower than what you had originally (under 10.1), because the B16A head's combustion chamber is raised, unlike a GSR head's combustion chamber. This is a GOOD thing if you plan on turbo charging the engine and don't plan on building the bottom end much, since the compression will be low. Just something to think about, if you haven't yet....



[Modified by Katman, 2:02 PM 3/27/2002]

 

is the mugen ECU good cause it gives more fuel?

 

Katman, I'm planning for all-motor. Will that program be in my favor? i know this a newbie question... Which mani are single butterfly? I will be using a JDM b16 Sir mani.

From what I know of the mugen p28, that upgrading the valvetrain and the cams will go really well. Don't forget the v-afc to run it lean. If I am wrong about this plz be free to correct me. Still in the learning stages.

 

the only dual butterfly intake mani there is for a b-series is the P72 94+up GS-R intake manifolds. If you want to run a chipped ecu on a gs-r, it is to your benefit to run a Skunk2 manifold or the JG one becuase none of the chip programs control the secondaries (or butterfly) for the stock gs-r manifold.

 

pretty much...amongst other things too (timing etc)

 

pretty much what B_zurC said it..
Single-butterfly intakes are any B16A/B17A/CTR/ITR/LS intake manifolds.

The 94+ GSR manifold is the only b-series dual-butterfly intake manifold.

on a side note, H & F series has a couple dual-butterfly intake manifolds.


The mugen program should run well with your setup. Its suggested to upgrade your camshafts to at least Type-R spec to make some good power...along with a VAFC or SFC to fine tune.

 

Im running a JG Redline series b16 head on a b18C Pro series block bored out to 2.0(85mm).


[Modified by SUPERADVANDB8, 8:17 PM 3/28/2002]

 

I may want to go turbo but if I can get a descent streetable compression out of the b18c/ b16a hybrid, I will work with that for now. Dont the ITR pistons bring the compression up to like 10.8:1. Let me know the compression on the 2. Thanks.

 

well you need to choose what you want to do. As a rule of thumb, it's best to have low compression engine setup with a turbo application. Now if you stuck JDM ITR pistons in the engine combo you wanna do (B18C block/B16A head), your compression will be around 11.1; US ITR pistons will put you at about 10.6 cr. The difference between the US/JDM ITR pistons area the dome height -- the JDM version has a higher dome which = higher compression.

If you ultimately are going turbo.... If i were you, I'd just leave the stock B18C pistons in there.