I got a JDM ITR short block thats gonna going into my GSR, I got a friend whos selling a B16 head and a GSR head, both are stock. but I just wondering which head will be the best for the ITR block.

thanks!!

 

Either head will work fine for you.If your going to use a stock gsr manifold and your using your gsr ecu than go with the gsr head.The heads are very equal in performance,its mostly the intake manifold choice.
Glenn

 

If you want more compression, the gsr head will yield more compression. I've heard the b16 head is similar to the type R. I'm not sure which head has better flow though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aLLMotorDB8 &raquo;</TD></TR><TR><TD CLASS="quote">If you want more compression, the gsr head</TD></TR></TABLE>

 

yea the gsr yeilds more compression but if you want a aftermarket intake maifold i go with a b16 head. The price for the b16 intake manifold is cheaper than a gsr intake manifold and plus you don't have to deal with those secondary runners.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maxrpm &raquo;</TD></TR><TR><TD CLASS="quote">yea the gsr yeilds more compression but if you want a aftermarket intake maifold i go with a b16 head. The price for the b16 intake manifold is cheaper than a gsr intake manifold and plus you don't have to deal with those secondary runners.</TD></TR></TABLE>

Well you can get a blox intake manifold for either head at the same price. Those dont have secondaries. I had that on my first setup with a stock obd2 ECU.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aLLMotorDB8 &raquo;</TD></TR><TR><TD CLASS="quote">
Those dont have secondaries.</TD></TR></TABLE>

whats wrong with dual stage intake manifold?

 

Yeah, I thought that dual stage could be good because longer runners create higher air velocity at lower rpm meaning good low-end power, and short runners are ideal for high-rpm power. Please, enlighten me.

 

please read the post carefully before you post. I just said it did not have secondaries. In no way shape or form did I say secondaries are bad.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maxrpm &raquo;</TD></TR><TR><TD CLASS="quote"> The price for the b16 intake manifold is cheaper than a gsr intake manifold and plus you don't have to deal with those secondary runners.</TD></TR></TABLE>

Sorry for the misunderstanding then but this post makes it appear as if secondary runners are a nuisance. My mistake.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by veeetech &raquo;</TD></TR><TR><TD CLASS="quote">

Sorry for the misunderstanding then but this post makes it appear as if secondary runners are a nuisance. My mistake.</TD></TR></TABLE>

No problem... I just wanted to clarify my statement.

 

here is the story behind the GSR manifold......

The IAB setup on a GSR manifold is great for what it was designed for from the factory.

If you are going to us an ECU that will be able to control the IAB's then upgrading or changing to a type-r style manifold like the blox or S2 will depend on what mods you have already - IE cams, head porting, header, and so on.....it will be on a dependent on flow basis for what you are trying to achieve.

If you are going to us a P28 style ecu without IAB control then it would be ideal for you to use a type-r style manifold like the blox or S2, or even the aebs.

Without the proper control for the IAB the gsr manifold is rendered useless from it design.

So in no way is the GSR style manifold a problem, its just the controlling of the IAB that becomes the problem....

Some engines will also need more flow then what the stock GSR manifold will yield, thus making the switch to a type-r style manifold warranted.

By the way.....the IAB is the butterflys that are inside the manifold that open and close by a controlled vacuum source......IAB = internal actuated butterfly's

hope this helps a little.

 

what about a gsr head on a b16a1 with the b16 ecu and IM? is there a noticable (positive) difference. im planning on getting a stroker kit (2.2 or more) with high compression, crower head internals, port polish..etc....i never get any answers out of my own posts

 

So what ECU are you going to be using? What's the price difference between heads? What about the condition of each head? How far do you plan to go on the build? If you plan on upgrading the IM some time, which you should if you get cams and other toys, the B16 might be a better choice because it's significantly cheaper, and the angles of the runners on aftermarket IM's match those of a B16. If you look at the GS-R IM compared to aftermarket GS-R IM's, they don't exactly follow the angle that would promote the best flow. This point I'm trying to make though is based on the assumption that the intake runners are near collinear with the intake ports on both heads, which might not be true. Also, from what I read in this thread, a GS-R head will give you more compression, but if you do decide to go with the B16, you could use a thinner head gasket to make up some the difference, depending on how big of a difference there is.

EDIT - actually, now that I think about it, if you have the time, money, and control over the IAB's through your ECU/tuning device, the GS-R head could be a good option because you'd start off with more compression and could do cool things to the GS-R manifold like porting it to make increase it's performance.