Exhaust port plates

Exhaust port plates
September 10 2001 at 6:22 PM
No score for this post Bobby A (no login)
from IP address 209.245.99.21

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Anybody ever hear about intake/exhaust port plates,from www/mpgheads.com They make them for Dove-c heads,plus a few smaller ford block applications.Also windage trays.Any body willing to check out their site and see if this makes sense or is another split-fire spark plug type myth.Couple of guy`s talked about these on another forum and said they work great.


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Bobby A
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64.158.25.156 This is their site
No score for this post September 10 2001, 6:33 PM

http://mpgheads.com/port_plates/htm


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IRSS
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64.24.192.73 port plates
No score for this post September 10 2001, 7:20 PM

I have a set of MPG port plates on my D0VE-C heads. They did increase the flow by exactly 30 CFM over the port without them.

The kicker is that it also increased the turbulence right where the tounge meets the floor of the port. Its a toss up issue.

You can get better results by welding in a piece of 3/16" steel plate to take up the space on the floor of the port.

This will do the same thing as the port plates, but the plate will be flush with the floor where the two meet.

The MPG plates have a raised up portion that the exhaust gasses must pass over, this reduces the efficiency.

After welding in your own plates, smooth them over with the grinder, just like when you're doing porting work.