Hey, are there any differences between the S4 na block and S4 turbo block. Can you just switch out the manifolds and electronics. The car I am buying has an Na engine in it now but the manifold for the turbo is still on there just blocked off and the electronics are still in there. I think he swapped in an 88 na engine and just put the old turbo manifolds on, also some of the electronics are still around just not connected.

Turbos are 4 port, na's are 6 port.

am i missing something here?

maybe someone dropped in an old 4 port 13b na motor ?

sorry didnt fully explain I have yet to confirm the 6th ports but the engine is from a 88 gxl I think so I assume it has 6 ports. I guess its kinda hard to explain maybe ill take some picks once i get the car in. In the case that it does have 6 ports that pretty much solves my questions, totally forgot about that https://www.nopistons.com/forums/pub...1047683664.gif .

In order for the stock turbo manifold to clear the N/A intake manifold, you will either need to get a set of Tii manifolds, and port match the LIM to the N/A LIM gasket.



OR



Put a spacer on the stock turbo manifold.



OR



Just buy an FD manifold, drill out the bolt holes a bit. (aftermarket turbo/wastegate reqd)

stupid computer

So the Fd manifold would be easier to fit on, other than using a spacer on the T2 manifold

Wait, the guy u got it from swapped a n/a engine into a TII, and the manifolds and everything just bolted on? how the hell does that work, and where are the 5th and 6th ports exhausting to?

[quote name='toplessFC3Sman' date='May 19 2005, 12:48 AM']Wait, the guy u got it from swapped a n/a engine into a TII, and the manifolds and everything just bolted on? how the hell does that work, and where are the 5th and 6th ports exhausting to?


[/quote]



the aux ports are only on the intake...



so where do they take in air?

[quote name='U of Dayton-FC3S' date='May 18 2005, 03:50 PM']So the Fd manifold would be easier to fit on, other than using a spacer on the T2 manifold


[/quote]



You completely mis-understood what I posted.

[quote name='drftk1d' date='May 19 2005, 12:59 AM']the aux ports are only on the intake...



so where do they take in air?


[/quote]



You have to grind the turbo lower intake manifold to match the N/A ports/lower intake manifold gasket.



Also you can make the two ports on the side plates into one, since the hole is going to be one hole on the LIM.



U of Dayton-FC3S: To use the FD upper intake manifold you have to use a turbo Series 5 (89-91 model) lower intake manifold, grind that to match the N/A, then port match the FD intake manifold to the S5 upper intake gasket, get the FD oil filler neck, and other ****. I'm sure there's a thread on here somewhere.

-yea, thats what i meant.. damn lack of sleep...



What are the benefits of using the FD intake? better flow? bigger TB?

Both FD/FC UIM flow about the same. You mostly benefit from the longer intake runners. And yea the TB is a little bigger.



But the benefits don't outweigh the hassle of it, unless you're good with a dremel, or buy the $400 adapter piece.