I'm in the process of swapping my 0-320 for an 0-360 and have a question I'm hoping those more knowledgeable than myself might be able to help me with. I installed an electronic fuel injection system on the old engine and was using a throttle body I made from a Datsun 240z throttle body. The intake size is 52mm and lined up perfectly with the intake hole on the bottom of the sump. The sump intake hole on the 360 is 60mm but looks like it has been machined larger forming a smooth down to a 53mm hole where it enter the interior of the sump. I'm guessing the old 52mm throttle body is large enough for the new engine, (only being 1mm smaller then the ultimate intake diameter) however I'm concerned about the "step" the air is going to see when it enters the system (going from a 52 mm opening to a 60mm opening). As a side note, the fuel is not injected until about midway up the intake tubes. Is this step up in size something I should be concerned about? Is there any reason to fabricate another 60mm throttle body?
Thanks
GEM
Thanks
GEM