S3 To S4 Intake Mod
#2
7-less
Join Date: Dec 2005
Location: No. Virginia, USA
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See if this helps, it's the only one I know of that at least shows the setup and how the guy did it. It's more towards the bottom.
https://www.rx7club.com/1st-generation-specific-1979-1985-18/better-intake-s4-s5-707962/
https://www.rx7club.com/1st-generation-specific-1979-1985-18/better-intake-s4-s5-707962/
Last edited by 85 FB; 12-15-07 at 10:08 PM. Reason: Link
#4
Red 84 SE
Join Date: Sep 2007
Location: Port Orchard WA
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yeah a was gunna buy one of that guys s5 intakes. but hes got back proplems so it might be a while and then i found some cheap ITB's so i dont think its gunna happen. The only propblem is that the s5 have VDI wich you need to run a rpm swich for. And i believe the S4 6ports are still exaust actuated while the s5 are air pump actuated. Correct me if im wrong. Oh the intake in that pic is an s5 not an s4. other than that i believe if you going to go from s3 to s4 all you have to do is block of the egr passage or something let me see if i can find the article that was on it
#6
Red 84 SE
Join Date: Sep 2007
Location: Port Orchard WA
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the only thing i know of is if you going to use a s4 intake you will have to grind the lower intake flat where the egr passage is and fabricate a braket to close off the rest of the egr port because s4 have smaller ports than SE do. but i cant find were the guy did a walkthrough on it.
#7
Red 84 SE
Join Date: Sep 2007
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oh well i found what i was talking about. go down to the pic with the intake gasket on it and youll se what im talking about other than that i dont know of any problems.
https://www.rx7club.com/showthread.p...s4+intake+swap
https://www.rx7club.com/showthread.p...s4+intake+swap
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#9
Red 84 SE
Join Date: Sep 2007
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other than that i dont know for sure i heard something about you have to get your s3 BAC to work in the s4 intake with a little modding. what you could always do is get a complete s4 intake and start tearing **** up. best way to learn besides it more fun that being told how to do it.
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