Bearmw
Well-Known Member
I have a dilemma.
I am putting a B35 in my Bavaria. The motor has Paul Burke pistons and N21 cam and I am also going with the L-jet intake with 320i C-tubes, new 26lb injectors from FIC, and megasquirt. I am concerned about the size difference between the much smaller manifold opening and the head intake port costing too much power. I have put a B35 gasket on the L-JET stub to show the difference. Maybe it doesn't matter and I have seen differences of opinion on whether it makes sense to try and port the intake stubs to closer approximate the B35 port size and shape even going as far as adding some weld so the aluminum doesn't get too thin and filling the void near the injector with epoxy.
I understand a small mismatch going smaller to bigger isn't really an issue but this seems like a pretty big difference. Thoughts? Also, the stub casting is pretty rough as can be seen in the pic and I figured I will clean it up a little regardless. I am also concerned about losing too much air velocity if I go bigger at the very end of the stubs. I appreciate your input.
I am putting a B35 in my Bavaria. The motor has Paul Burke pistons and N21 cam and I am also going with the L-jet intake with 320i C-tubes, new 26lb injectors from FIC, and megasquirt. I am concerned about the size difference between the much smaller manifold opening and the head intake port costing too much power. I have put a B35 gasket on the L-JET stub to show the difference. Maybe it doesn't matter and I have seen differences of opinion on whether it makes sense to try and port the intake stubs to closer approximate the B35 port size and shape even going as far as adding some weld so the aluminum doesn't get too thin and filling the void near the injector with epoxy.
I understand a small mismatch going smaller to bigger isn't really an issue but this seems like a pretty big difference. Thoughts? Also, the stub casting is pretty rough as can be seen in the pic and I figured I will clean it up a little regardless. I am also concerned about losing too much air velocity if I go bigger at the very end of the stubs. I appreciate your input.
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