is there really much of a difference between the two blocks? I keep seeing all these FD single turbo kits and cannot help but wonder if they would bolt up to the FC block. I would likely never buy a kit as I have my eyes set on a BNR stage 3 and brian is like 2hours drive away from me. I just want to know how much difference is in the two blocks. thanks!



-B.

 

the intake ports are slightly larger. and the spark plug placement is moved slightly also, for timing. theres other little things like front cover, water, pump, but im guessing you meant the core. not the accesories.

 

The exhaust ports are larger on the FD too hence a FD turbo setup not working on a FC.



I honestly do not know if you could port the FC exhaust ports to match FD ones.

 

Ah yes I figured something with the ports might be different but I was more concerned with the placement of them. I was not sure if they were closer together or farther apart or even higher or lower on the irons. I guess that answers my question. I guess I was just curious as to "would an aftermarket FD manifold bolt up to an FC block."



-B.

 

An FD turbo manifolds bolts up just fine to the FC block - I've done it. The issue is the placement of the turbo is not usually suited for the T2 lower manifolds or the lower frame rail/shock tower.



Other differences in the core are stronger rotor tips, more casting in around the dowels (stronger), water passages around the spark plug inlet to keep them cooler. The REW block will support more HP than an FC block...



A custom turbo manifold is the best bet for the FC, that way you get the best placement and flow...

 

you can use a manifold suited for an FD, but usually, you need to space it out a little.

what you can do is, buy a manifold flange from racing beat or make something yourslef. this flange can be used as a spacer.

its just enough to clear the turbo from the inlet manifold.

 

Cool, I really didnt think there would be that much difference in the two blocks. I did however think there would be clearence issues but not really major ones. Tubular manifolds are becoming more available it seems and I am pretty decent with a cutting torch and can get the material easy. I also have a little know how with welding so making an adaptor flange/downpipe wouldnt be out of the question. Well cool, I was just checking on this for future reference and maybe anyone else out there lurking for the info. I am going to be talking with Brian at BNR this year sometime about his stage 3 for the S5 so we'll see how it goes. Thanks for all the info guys,



-B.