Port and Polish?
#1
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Port and Polish?
Hey guys I was wondering what exactly do you gain from porting and polishing the heads and intake? I have a 454 mag and im wondering if its worth my weekend porting and polishing them. How much horsepower could I really gain and mph, if any? What do you guys think?
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I know how to do it, i was just wondering if I was going to see any difference. Its a stock 454 mag with EMI thunder exhaust manifolds, nothing special. Thats why I was wondering if it was even worth my time to do it...
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I have done several sets of heads. You would also want to do the intake. The common mistake is removing too much material. I do a gasket match then blend it back, remove casting flash, short side radius, bowl blending then clean up the chambers. To do it right takes a lot of time, you need a good air compressor, rotory tool, abrasives kit, grinding stones, ect... Its hard to get speed out of a boat, you may see 1 or 2 MPH. To get real power you will have to do the cam, exhaust and a bunch of other parts to make it work well.
I see you have exhaust, you are one step ahead.
Gat a roller cam from RMbuilder that will get you some HP.
I see you have exhaust, you are one step ahead.
Gat a roller cam from RMbuilder that will get you some HP.
Last edited by jeffswav; 04-21-2011 at 06:20 PM.
#8
If your port work necessitates the use of a flow bench (for porting purposes), then your in the wrong forum (do it yourself, boating on a budget)
#9
I have done several sets of heads. You would also want to do the intake. The common mistake is removing too much material. I do a gasket match then blend it back, remove casting flash, short side radius, bowl blending then clean up the chambers. To do it right takes a lot of time, you need a good air compressor, rotory tool, abrasives kit, grinding stones, ect... Its hard to get speed out of a boat, you may see 1 or 2 MPH. To get real power you will have to do the cam, exhaust and a bunch of other parts to make it work well.
I see you have exhaust, you are one step ahead.
Gat a roller cam from RMbuilder that will get you some HP.
I see you have exhaust, you are one step ahead.
Gat a roller cam from RMbuilder that will get you some HP.
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