2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

S4 in an S5 question

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Old Apr 15, 2008 | 01:07 PM
  #1  
ehime's Avatar
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From: Osaka / Seattle
S4 in an S5 question

I just got a smoking deal on a rebuilt S4 engine that is just to good
to pass up. I would like to know though if there is anything I will need
to change on the engine before I drop it in. I have a 89 GXL S5, and
since this is an earlier S4 engine I'm not sure if it is a direct swap or
if I'll need to change anything on this engine to get it to play nice with
my S5.
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Old Apr 15, 2008 | 01:29 PM
  #2  
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From: eureka
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/%2Aplease-help-%2A-s4-turbo-s5-turbo-swap-748406/
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Old Apr 15, 2008 | 01:29 PM
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From: PHL
there are a few things you'll need to change.
the OMP and front cover are the first that come to mind. searching should help you out, I know this has come up more than once.
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Old Apr 15, 2008 | 01:35 PM
  #4  
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From: Norcal, Bay Area
Run the S4 block and S5 accessories.
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Old Apr 15, 2008 | 01:35 PM
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center plate on the s4 block has the EGR on it, this needs to be removed/blocked off
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