1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

4 Port Intake on a 6 Port motor?

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Old 11-17-04, 02:16 AM
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Rotartist

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4 Port Intake on a 6 Port motor?

I feel like a newb....

Ok I have a 6 port 13B out of a 2nd gen in my 85 gs.... I found a carb and manifold for a 4 PORT 13B out of a 70's cosmo for dirt cheap....

Q- can i use the 6 port motor like a 4 port by using this set-up?

Q- will this manifold bolt up?

Q- Will the car run ok with the 5th and 6th basically blocked off...

Q- wouldn't this be perfect for a blowthrough?

Thx a lot..

trevor
Old 11-17-04, 02:20 AM
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some people have modified the T2 4 port manifold to fit the 6 port engines.
I think the 70's had something blocking the later manifolds so no clue
bolt pattern should be the same
if you grind out the 4 port intake it will blend into the 6 ports.
not the perfect blow thru.
Old 11-17-04, 02:59 AM
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The 70's 4 port bolt pattern is way different. Add to that the fact that they had really small primary intake runners. I wouldn't suggest it. Yes it can be adapted but I don't think you are going to get the performance out of it that you want.
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