Head porting
Thread Starter
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Road Master
Joined: Oct 2007
Posts: 925
Likes: 56
From: Memphis, TN via NoVA
Harp: I'll be sure and include cam recommendations in my conversation with them both. Thanks for the input!
Grand HDF Member
Joined: Sep 2022
Posts: 4,253
Likes: 3,670
From: Florida
A mild conservative port clean up isn’t going to “screw up” anything. A clean up removing flashing isn’t going to ruin anything. A mild clean up around the guide will only increase flo. A good valve job will only promote good seal and promote flo. There is plenty of meat left for someone to take thousands of your dollars to get that hour upon hour of flo-bench testing to show you a piece of paper that says it will do that last 10-15% you’re so eager to pay someone else to do, because you can’t or are too scared to try.
None of your response shows you know anything about head porting except you believe in the money you spend someone else to make you feel like they did it right. Go break some heads, try porting.. bolt it on a bike and go see. A flo-bench won’t give you much of a meaningful answer. It’s like a dyno.. it will show you mathematical hypothesized measurements that statistically show improvement. I’ve spent money having some heads professionally ported. Three sets actually, I’ve done it myself. I’ve ruined heads and of gotten lucky. I stand behind what I said because I know they are facts. I’ve done it too many times to take the time to argue with someone who is clueless.. so I’m leaving this thread not offering any more real experience or help.
None of your response shows you know anything about head porting except you believe in the money you spend someone else to make you feel like they did it right. Go break some heads, try porting.. bolt it on a bike and go see. A flo-bench won’t give you much of a meaningful answer. It’s like a dyno.. it will show you mathematical hypothesized measurements that statistically show improvement. I’ve spent money having some heads professionally ported. Three sets actually, I’ve done it myself. I’ve ruined heads and of gotten lucky. I stand behind what I said because I know they are facts. I’ve done it too many times to take the time to argue with someone who is clueless.. so I’m leaving this thread not offering any more real experience or help.
Last edited by Rains2much; Feb 22, 2024 at 06:36 PM.
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,048
Likes: 990
yep, a dyno is just a tool, a predictor not written in stone. seen tooooooo many times a shade tree smoke a dude with a pocket of certs from a dyno.
unless you are going track and have highly modified engine and intake tract, leaving the intake alone for the street is better as it adds to the mix, more important on a carb. the hd tract is tooooo short, spend your money on the exhaust side.
all said and done, probably be cheaper to buy a known good performance package with all the bells and whistles.
i agree with mr. rains. man have i messed up some stuff but the GOOD thing is i learned. my experiments with 5 porting a suzuki like a yamaha was a bust and building toooo big has it own hazards, my 305 honda would stay up with a 750-4 within 1>2 bike lengths until it topped out. the killer was i could only get 3 runs if lucky before the rings shattered and blue smoke appeared. happened so many time, i developed a way to pull the top end off in frame.
i build pedal steel guitars now and i still learn from my mistakes, makes a better machinist for sure.
unless you are going track and have highly modified engine and intake tract, leaving the intake alone for the street is better as it adds to the mix, more important on a carb. the hd tract is tooooo short, spend your money on the exhaust side.
all said and done, probably be cheaper to buy a known good performance package with all the bells and whistles.
i agree with mr. rains. man have i messed up some stuff but the GOOD thing is i learned. my experiments with 5 porting a suzuki like a yamaha was a bust and building toooo big has it own hazards, my 305 honda would stay up with a 750-4 within 1>2 bike lengths until it topped out. the killer was i could only get 3 runs if lucky before the rings shattered and blue smoke appeared. happened so many time, i developed a way to pull the top end off in frame.
i build pedal steel guitars now and i still learn from my mistakes, makes a better machinist for sure.
Last edited by bustert; Feb 23, 2024 at 08:11 AM.
Tourer
Joined: Oct 2010
Posts: 405
Likes: 238
From: NW MO
A mild conservative port clean up isnt going to screw up anything. A clean up removing flashing isnt going to ruin anything. A mild clean up around the guide will only increase flo. A good valve job will only promote good seal and promote flo. There is plenty of meat left for someone to take thousands of your dollars to get that hour upon hour of flo-bench testing to show you a piece of paper that says it will do that last 10-15% youre so eager to pay someone else to do, because you cant or are too scared to try.
None of your response shows you know anything about head porting except you believe in the money you spend someone else to make you feel like they did it right. Go break some heads, try porting.. bolt it on a bike and go see. A flo-bench wont give you much of a meaningful answer. Its like a dyno.. it will show you mathematical hypothesized measurements that statistically show improvement. Ive spent money having some heads professionally ported. Three sets actually, Ive done it myself. Ive ruined heads and of gotten lucky. I stand behind what I said because I know they are facts. Ive done it too many times to take the time to argue with someone who is clueless.. so Im leaving this thread not offering any more real experience or help.
None of your response shows you know anything about head porting except you believe in the money you spend someone else to make you feel like they did it right. Go break some heads, try porting.. bolt it on a bike and go see. A flo-bench wont give you much of a meaningful answer. Its like a dyno.. it will show you mathematical hypothesized measurements that statistically show improvement. Ive spent money having some heads professionally ported. Three sets actually, Ive done it myself. Ive ruined heads and of gotten lucky. I stand behind what I said because I know they are facts. Ive done it too many times to take the time to argue with someone who is clueless.. so Im leaving this thread not offering any more real experience or help.
Grand HDF Member
Joined: Sep 2022
Posts: 4,253
Likes: 3,670
From: Florida
Ill glance in my rear view mirror, doubt Ill ever see you catch up enough.
Thread Starter
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Road Master
Joined: Oct 2007
Posts: 925
Likes: 56
From: Memphis, TN via NoVA
Cya!!
Grand HDF Member
Joined: Sep 2022
Posts: 4,253
Likes: 3,670
From: Florida
Well then quit replying to my posts.
Road Master
Joined: Mar 2013
Posts: 817
Likes: 380
From: Central Ohio
I'd opt to have WFO Larry do some light work on the 110 heads, they'll flow great. Don't get too caught up on compression, doesn't NEED to be 10.5:1 to get a good runner
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