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Old 03-19-2012, 08:41 AM
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learjet2230 learjet2230 is offline
TT Enthusiast
Join Date: Dec 2007
Boat: 1988 Mastecraft Prostar 190, Powerslot, 351 Windsor
Location: Granbury, TX
Posts: 461
Originally Posted by 89BigBlock View Post
Well after searching for parts online I've concluded 2 things.
2. There is A LOT of restriction on these systems.
The risers and fiberglass silencers have a ****-ton of exhaust flow obstacles and deflections. Wish I could get a decent pic for show and tell. One would think there is a fair amount of performance enhancement there. I'm wondering tho..what kind of back pressure, if any is needed?
I know exactly what your talkin about inside those mufflers. I was pretty shocked to see that as well. As far as back pressure.....who knows. My boat has been "open" for 4 years now with no probs. Power seems plentiful. Just my opinion.
1988 PS190 Powerslot, INDMAR 351W, Edelbrock Intake, MSD Ignition,
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