Turbo manifold 7afe

[SpyderGS]

Hey everybody, just have a quick question. I am wondering if i can use a honda D series turbo manifold (with 7afe flange) or if everything, like runners, fit better with a B series manifold. I can get either a d series tubular stainless tig welded turbo manifold or a b series cast manifold. Both are around $40, and they are really decent quality(i've held both of them). The tubular is really really nice : ) completely tig welded! The cast is really clean looking. Both are flanged for a mitsu 16g turbo. kinda odd, but they fit to a spare 16g turbine housing like a glove. Remember, it's for a 7afe. I just want to know whether the 7afe flange is easier to fit to the runners on the b series or d series manifolds. thanks to anyone who can help!

[94_Rolla_Guy]

Just remember you can't weld to cast iron.... I was just reading through some stuff i think on 6Gcelica.net and someone said that B16A manifolds are relatively close and can have the honda flange cut off and a 7afe rewelded on

best way to tell if a given manifold will work is to go to the parts store and compare the manifold gaskets...for pipe size and placement...

[Flashmn]

Just remember you can't weld to cast iron.

Yes you can, takes few steps more to do it, but its possible.

[SpyderGS]

You could tig weld cast iron, but you'd have to preheat the piece and do some other things that aren't readily available to a do it yourself kinda guy. I was thinking more of a high temp brazing. There's a process that brazes at like 1800F, far higher than exhaust temps can normally reach, but i'm not sure if that's safe for cast iron.

But thanks for the idea 94_rolla, kudos

[Flashmn]

Brazing wont hold in those conditions. Your turbo manifold temps can be 1000C (about1800F) after a hard pull.

Preheating with a torch and then tigging and letting it cool down slowly (oven cooling, sand cooling) should make you a decent weld. HEck you could even stick weld it if you wanted to. With a correct stick shouldnt be a problem.