S4 NA to turbo conversion questions
05-29-18, 10:00 AM
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S4 NA to turbo conversion questions
Thing is i have a full s5 T2 engine that im going to rebuild, just thought about moving the turbo stuff onto my s4 NA engine while im waiting for funds to get rotorhousings and rebuildkit. Now what km wondering before i start is, if the kntake manifold will fit, and if its needed at all? What about 5th and 6th port? Just block them off? I have the entire s5 t2 drivetrain, just need to know what i need to swap onto my s4 na to make it run boosted. Honestly dont care if it blows up after 1000 miles. Hoping someone can brighten me up om this, with like a step by step or something 
05-29-18, 01:38 PM
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Hey Dak, thanks for the reply, but thats not quite what im looking for. Since i already have all the s5 turbo parts, im just looking at doing a “stock” conversion with the stock s5t2 parts on an s4 na block
05-30-18, 12:57 PM
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The reason being that you still have to get oil and water to the turbo( which he covers) even if you use your turbo manifolds. Which in order to do that you need to do this: https://www.aaroncake.net/rx-7/4PortLIMTo6Port.htm If you plan to use your LIM again on your turbo block you would probably need to source another LIM to port. If you port it though, once you get oil and water figured out everything else bolts on like it would on a turbo car( of the same series). There were some differences between S4 and S5. Mainly the EGR setup but someone else will have chime in on how to deal with that.
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