Bolt Patterns

[bov300zx]

Are the bolt patterns in the head if the B18A, B18B, and B18C the same? I wanted to use an intake manifold designed for a gsr on my 91 b18a. Is it possible?

[civickiller]

well anything is possible, its not a direct bolt on because the botl pattern doesnt match

[Ricochet]

99% sure it will fit because all B-series manifolds are compatable.. Try taking measurements to see.

[Plastic_Fork]

I believe the GSR manifold is the only one not compatible with the other B-series heads. The GSR manifold has the dual-runner design and the bolt pattern is a little different. The B18A, B18B, and B16A manifolds are compatible with each other I believe.

He'll probably have to swap a GSR head onto his motor to accomplish this, which means wiring in VTEC and swapping the ECU if you want it all to work properly. Basically an LS/VTEC with a GSR head and manifold.

Personally I would just use the B18B manifold.

[bov300zx]

Thanks for the info. Any recomendation for a head swap without having to spend $1500 to for a full ls/vtec conversion? Thanks again.

[jcrx]

Originally Posted by Ricochet

99% sure it will fit because all B-series manifolds are compatable.. Try taking measurements to see.

No, they aren't, GSR's is different.

[boosted331]

Originally Posted by bov300zx

Thanks for the info. Any recomendation for a head swap without having to spend $1500 to for a full ls/vtec conversion? Thanks again.

How the hell do you figure 1500 bucks? A GE vtec conversion kit has all the shit you need (oil line, oil filter adapter plate, head gasket, dowel pins, etc), toss in your VTEC head, a new ECU and you're gravy. You can spend less than 1000 and get it done.

[civickiller]

where do you guys get yoru info from, damn

b18a, b18b, b20 intake manifold are the same
b16a, b17a, and type r intake manifolds are the same
b18c is different from the rest

so a b18c intake manifold will not fit on the b18a or b's because the bolt pattern is different

[Ricochet]

Guess that 1% kicked me in the ass