vitara/samurai exhaust manifold.

[mk1joe]

hey,
Im currently running a vitara 8v with a standard samurai manifold and exhaust. is there a lot of difference in the bore of the vitara exhaust? eg: would it be worth putting a vitara exhaust on it? i imagine it would probably help it breathe a lot better.

also im going about making my own inlet manifold but i noticed this hole in the head.

its in the vitara head and the samurai head, but theres no hole in the manifold for it to go into, so what does it do? is it importiant?



Thanks for the help guys

[Edweird]

A completely ignorant guess, I'd say it's part of some kind of exhaust recirculation system that's not in use.

[twiss]

Thats the preheat system for the inlet manifold. Helps it all warm up quicker!

You don't really need it... sometimes when you have an exhaust manifold with it and inlet manifold without it it can make a nasty exhaust ticky sound coming from almost inside the engine... when this happened to me I just blocked the preheat in the exhaust manifold

[ScottieJ]

Thats the preheat system for the inlet manifold. Helps it all warm up quicker!

Incorrect, it's there for an EGR system. Something that was not fitted on carb'd models therefore is blanked off.

[mk1joe]

i see! i didnt know EGR went back that long ago. but thanks for the info:)

and also its probably best to run a standard vitara exhaust right? rather than a smaller samurai one.

[ScottieJ]

Yeah I would run the vit manifold over the 1.3 one! No point restricting your engine.

[dan_2k_uk]

Yeah I would run the vit manifold over the 1.3 one! No point restricting your engine.

I measured them and both were the same (ports at least). Vit one fouls the chassis rail and SJ one bolts straight up to existing exhaust. Easy choice.

[ScottieJ]

? Strange as I have loads of room and I run the vit manifold and downpipes? I also actually measured the ports on a 1.3 and 1.6 head the other day when we was building up an engine for dads maruti and the 1.3 were quite a bit smaller? Unless I was being an idiot??

[dan_2k_uk]

The head ports were different but the manifolds and gaskets were the same.

Guess out engines are at different angles so mine fouled.

[ScottieJ]

I'm intrigued, maybe my exhaust manifold is different to the one you had, I'm gonna have to compare it to the one on dad's maruti