What is header drop?
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RE: What is header drop?
I think the normal convention is from the exhaust port, at least that's the way I've always ordered custom headers.
Of course, during installation planning, one has to learn the crankshaft to center of exhaust port dimension; many engine manufacturers provide that on drawings.
BTW - "Drop", is usually referenced to an inverted engine, with the header distance going further away from centerline. "Rise" is for upright installations.
Of course, during installation planning, one has to learn the crankshaft to center of exhaust port dimension; many engine manufacturers provide that on drawings.
BTW - "Drop", is usually referenced to an inverted engine, with the header distance going further away from centerline. "Rise" is for upright installations.
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RE: What is header drop?
header drop is the offset of the header pipe from exhaust port flange away from the engine crankshaft centerline. With the engine mounted inverted, this causes the header to exit lower (nearer to spark plug level) than the exhaust port, by the amount of drop specified.
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RE: What is header drop?
Guys
Thanks for clearing this up for me. I guess I ordered the wrong header, I think I should have got a 50mm drop, rather than no drop. Now I have to make an adapter plate, if I got the header with drop I would only needed to elongate one hole 2mm live and learn.
Thanks for clearing this up for me. I guess I ordered the wrong header, I think I should have got a 50mm drop, rather than no drop. Now I have to make an adapter plate, if I got the header with drop I would only needed to elongate one hole 2mm live and learn.