DJFields - I Need a Bit of Clarification
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Senior Member
Joined: Dec 2005
Posts: 1,262
From: Just South of the Ocala Nationa Forest
DJFields - I Need a Bit of Clarification
Don,
You made a comment:
"When the OE Head pipe has the flange mod done, it works great."
You've got me very interested now. What is the Flange MOD?
A link for imformation would be excellent.
I'm thinking of being the second person here with the HMF exhaust. Their support is now doubled!
You made a comment:
"When the OE Head pipe has the flange mod done, it works great."
You've got me very interested now. What is the Flange MOD?
A link for imformation would be excellent.
I'm thinking of being the second person here with the HMF exhaust. Their support is now doubled!
Senior Member
Joined: Dec 2005
Posts: 287
From: Wisconsin
1st Gear Member
RE: DJFields - I Need a Bit of Clarification
Marty
The Exhaust Port Flange I.D. of the OE head pipe is welded from the inside. Depending on manufacturing variablity, the amount of weld can vary. This will cause a restriction in flow. Mine was fairly significant. Basically, I took a die grinder, removed it so it was nice and smooth, and had a skilled welder friend touch up the joint from the outside. You can't add a lot as the flange will not bolt back up properly, but as you should know, you don't need gobs of weld for a strong joint It's a very straight forward mod to let the exhaust gas flow freely. When you remove the head pipe to look inside you'll see when I'm reffering to instantly.
Hope this Helps.
The Exhaust Port Flange I.D. of the OE head pipe is welded from the inside. Depending on manufacturing variablity, the amount of weld can vary. This will cause a restriction in flow. Mine was fairly significant. Basically, I took a die grinder, removed it so it was nice and smooth, and had a skilled welder friend touch up the joint from the outside. You can't add a lot as the flange will not bolt back up properly, but as you should know, you don't need gobs of weld for a strong joint It's a very straight forward mod to let the exhaust gas flow freely. When you remove the head pipe to look inside you'll see when I'm reffering to instantly.
Hope this Helps.
Thread Starter
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Senior Member
Joined: Dec 2005
Posts: 1,262
From: Just South of the Ocala Nationa Forest
RE: DJFields - I Need a Bit of Clarification
Thanks for the replies y'all.
When I get a few minutes of spare time, I'll remove the head pipe and take a look.
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Joined: Feb 2006
Posts: 17,484
From: bay area cali
RE: DJFields - I Need a Bit of Clarification
OMG you sound like an A-hole......lol J/K
what's up fellas.
what's up fellas.
ORIGINAL: Iowaguy
Not to sound like an a-hole or nothing, but I wonder if all those people claiming the oem header pipe makes more power than a BigGun, Muzzy, or Fourstrokeworks header know this. LOL
Not to sound like an a-hole or nothing, but I wonder if all those people claiming the oem header pipe makes more power than a BigGun, Muzzy, or Fourstrokeworks header know this. LOL
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