I have bored the throttle hole out to suit the 55mm throttle I have and I'm planing to open up the inlet holes to match the gasket (2nd photo) and clean up/smooth the radius on the runner inlet holes, and remove the lumps(bosses for bolts- I'll loctite the bolts to seal them) in between the holes.
You can see a step under the big port butterfly's(3rd photo) and I was thinking of blending it in better . You can see on the runners that right where the step is the casting steps down (last photo), so I'm thinking that I may have to weld this area up to keep the strength .
Any other suggestions / ideas would be appreciated
CUT OPEN MANI
EXTRA INSIDE GASKET
STEP BELOW BUTTERFLY
STEP IN CASTING
