Anyone attempt to port and polish your own heads?
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#3
There is definitely an art to it. Anybody can acquire the tools and means to do so but I'd imagine these quality shops which offer the service have tested difference methods countless times to find the optimal way to do it which yields the best results. So unless you have a dozen or so spare heads laying around and a Dyno @ your disposal I'd leave it to the professionals.....
#4
There is definitely an art to it. Anybody can acquire the tools and means to do so but I'd imagine these quality shops which offer the service have tested difference methods countless times to find the optimal way to do it which yields the best results. So unless you have a dozen or so spare heads laying around and a Dyno @ your disposal I'd leave it to the professionals.....
Not so Much a Dyno as compared to good numbers on a flow bench.
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every head porter out there started at one point,99.9% messed up the first couple sets (I know I did).porting takes a lot of experimentation,practice & understanding airflow to begin with (a long with machines & tooling)simply opening up the ports will usually hurt flow & the actual valve seat is one of the most important part to good flowing heads.with out a flowbench,i wouldn't attempt it.even if you got a increase in CFM,would they fit your build? here,we will port heads for the exact build their being used on.different CID,compression,power at a given RPM band,touring or "hotrod" builds all will be ported differently.give a idea of what the rest of your build is and we`ll at least point you in the right direction as far as where to remove material & conture
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#8
What one would suspect would be a "good" head, visually, can be a stone turd once looked at on the flow bench.
So many factors come into play when doing cylinder head work, that experience, is the only true teacher.
Subtle things can add up to big changes, and a flow bench is needed to see them.
Thousands and thousands of dollars in equipment needed for this work.
Scott
So many factors come into play when doing cylinder head work, that experience, is the only true teacher.
Subtle things can add up to big changes, and a flow bench is needed to see them.
Thousands and thousands of dollars in equipment needed for this work.
Scott
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HILLSIDE MOTORCYCLE & MACHINE, INC.
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HILLSIDE MOTORCYCLE & MACHINE, INC.
HARLEY-DAVIDSON SPEED & SERVICE CENTER
5225 SOUTH MAIN ST., MUNNSVILLE, N.Y. 13409
Sales/Support 315-495-6650
www.hillsidecycle.com
Walk-in Retail Showroom
Complete H-D Machine Shop
Case & cylinder boring
Complete Cylinder Head Shop
High-Performance Engine Kits
Crank Rebuilding
Direct Link & PowerVision Tuning
Goodson HD Tooling Manufacturer
Maxton Mile World Record
4500 sq ft. facility
OVER 35 YEARS OF H-D ENGINE BUILDING.
See us on Facebook.
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rigidthumper (11-28-2016)
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Originally Posted by grbrown
There was a local tuning shop around here who prepared heads for racing bikes as well as tuned road bikes. For tuning the '70s BMW twins he started by installing smaller valves than the factory and reducing the ID of the inlet ports. I wonder how long it took him to perfect that combo?!