How restrictive is stock 502MPI Exhaust?
#1
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Thread Starter
How restrictive is stock 502MPI Exhaust?
Engine room is super tight and though I like my Gils they are literally touching in twin engine bay- can someone compare difference in flow between Gils and stock Merc 502 MPI manifolds?
at what HP does it start to matter?
Thanks!
at what HP does it start to matter?
Thanks!
#3
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I'm not a twin engine owner but want to know about "stuff"
Touching won't last. Could you put a wedge gasket under the Gils to tilt them a bit? Or a thin exhaust gasket? Or both.
You probably can't tilt the engines on their mounts without throwing off their alignments to the transom plates.
I'd put up a lot of fight for 10 or 15 horsepower.
Touching won't last. Could you put a wedge gasket under the Gils to tilt them a bit? Or a thin exhaust gasket? Or both.
You probably can't tilt the engines on their mounts without throwing off their alignments to the transom plates.
I'd put up a lot of fight for 10 or 15 horsepower.
#5
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Thread Starter
not even Grif - but if I put a blower on it ;-)
looking at a pair of stock 502MPIs which come with stick exhaust - I already have Gils in the boat.... so thought I ask.
looking at a pair of stock 502MPIs which come with stick exhaust - I already have Gils in the boat.... so thought I ask.