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Im pretty sure i know what response i will get from this but its something i always kinda wondered. I tested it on guys in my shop and they gave me answer's i thought the general consumers would which suprised me. Im going to call this market research its not done to make anybody mad.

from these pictures what looks like better port work what would probably make more power and why? these are a stock valve 700xx head

people like bo please dont comment on this just yet i am curious what general people think, and dont think about to hard just give your first response ewwa, uhh ahh, 1 looks better becuase its shinnyer, 2 is better cause its bigger and shiny, 3 just cause, 4 because its rougher and will do something to the air. you know something simple








 

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1 and 2 look about the same to me 4 does look rough and smmes to have more materieal on the spline where they join toghter 3 looks like it could be polished a bit more but may just be that its a different angle.2 actually looks like the spline (center section is straighter than one if that makes since. there rambling from some one that knows very little about porting.
 

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im going to go with it doesnt matter how it looks, the flow bench tells the tale.
 

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I know de answer boss! (raises hand)
 

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\0.o/ I unno, give me charts with numbers and I can tell ya :lmao: The bottom one looks kind of rough I guess
 

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I have no idea, that’s why I'm glad I found a good builder close to me that can help me out lol. To me it looks like different stages in the porting process :confused:
 

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I have no idea, that’s why I'm glad I found a good builder close to me that can help me out lol. To me it looks like different stages in the porting process :confused:

:confused: To me they all look the same... are they just different angles from the same step in the process?
 

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I am going to go with I have no idea. Unless you are very experienced, I don't believe you can tell anything by how a port job will perform just by looking at it. Even a flow bench will only tell you so much, more flow isn't always better. The only real way to see which will make more power is to test each on a dyno. Although I am sure Eric has enough experience that he can do this my looking at it, just like any good engine builder can.

Then again, what do I know, I am just the dummy that knows how to twist the throttle!

Doug
 

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4. As stated, more material removed, so more flow. Leave it rough to improve fuel mixture. Exhaust side should be polished.
 

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Uhhhhhh that one!! :nuts:
 

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To me it could be two cam profiles,could be two different styles of needs such as a mx port or a dez port. I think there is alot of factors that go in to porting thats why I leave it to the pros.
 

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I would say the last one is better ported because it is straighter. It's just ported and not polished....
 

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I am guessing.
Pictures 1,2 & 3 look like a simply clean up of the casting marks etc and should flow fairly descent.Not great but alot better than stock.
Picture 4 looks like it has been butchered . Cant see it flowing that well.
 

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cant really tell looks like somebody practicing to me all look better than stock though sure dont look like CT RACINGS heads, only way to tell is try them i guess.
 

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I thought I remember reading somewhere that the intake you wanted rough not smooth, this will create a bit of turbulance to better mix the fuel and air.
 

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If my memory serves me right the turbulence helps maintain the atomization of the fuel.
 
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