Honda intake manifold
06-01-2012, 06:17 PM
#464
I also started on the manifold and found out there's really no easy way to mate a BP flange on the skunk manifold (BTW, just for reference, this was a b-series IM, right?). It's not as simple as cutting the flange off and welding the Miata one in its place.
The head's port spacing is very close at the head, but I can't weld the Miata flange on top of the Honda manifold. I have to cut the flange and injector bosses off of it first; a total of about an inch. Since the runners don't run parallel to each other, this changed the port spacing at the cut. The middle runners need to move about a quarter inch, while the outers need about half an inch to line up with the Miata head/flange. The runners on an Edelbrock manifold are parallel, so that would only require cutting the honda flange off, and welding the Miata one on.
As for this Skunk2, I will need some tubing to extend/spread the runners out a bit.
Actually, since your flange is recessed, this is probably the better way of going about it anyway. There's no way I could have shaped the cast runners to fit into the recess. There would have been a step there. With the tubes, it'll be a smooth transition from flange to runner. Here are the pics:
Abe ARTech
The head's port spacing is very close at the head, but I can't weld the Miata flange on top of the Honda manifold. I have to cut the flange and injector bosses off of it first; a total of about an inch. Since the runners don't run parallel to each other, this changed the port spacing at the cut. The middle runners need to move about a quarter inch, while the outers need about half an inch to line up with the Miata head/flange. The runners on an Edelbrock manifold are parallel, so that would only require cutting the honda flange off, and welding the Miata one on.
As for this Skunk2, I will need some tubing to extend/spread the runners out a bit.
Actually, since your flange is recessed, this is probably the better way of going about it anyway. There's no way I could have shaped the cast runners to fit into the recess. There would have been a step there. With the tubes, it'll be a smooth transition from flange to runner. Here are the pics:
Abe ARTech
Last edited by yellowihss; 06-01-2012 at 07:07 PM.
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06-02-2012, 02:35 AM
#469
The welding part is tricky. No matter what you do the flange will warp from the heat. You have to find a machine shop that can resurface it flat. Then you also have to deal with the pin holes. No matter how clean there always seems to be some. Resurface again if your dumb like me cause you welded pin holes after the first resurfacing. If all that ain't bad enough blending the flange and runners to eliminate and flaws is impossible cause you can't get inside far enough to weld. Don't laugh I used this to smooth out the ports.
ftjandra your approach looks great. Port matching may work out better than mine. The flange warping maybe worse though.
ftjandra your approach looks great. Port matching may work out better than mine. The flange warping maybe worse though.
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06-02-2012, 10:28 AM
#471
Ok, mind change #3412. I'm selling my manifold stuffs. Manifold, Skunk2 70mm TB, reducing (3'-2.5") 90* coupler, new TPS all for sale soon.
Got a daily to work on (blew the engine, longish story) and we need the money for moving expenses.
I'll have my wife send pics of the stuff and start a for sale thread.
Got a daily to work on (blew the engine, longish story) and we need the money for moving expenses.
I'll have my wife send pics of the stuff and start a for sale thread.
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06-02-2012, 11:05 AM
#472
Ok, mind change #3412. I'm selling my manifold stuffs. Manifold, Skunk2 70mm TB, reducing (3'-2.5") 90* coupler, new TPS all for sale soon.
Got a daily to work on (blew the engine, longish story) and we need the money for moving expenses.
I'll have my wife send pics of the stuff and start a for sale thread.
Got a daily to work on (blew the engine, longish story) and we need the money for moving expenses.
I'll have my wife send pics of the stuff and start a for sale thread.
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06-02-2012, 11:35 AM
#474
kotomile@gmail.com guys, it wasn't my intention to clutter this thread with my for sale stuff. Thanks 
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