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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #1  
Old 7th June 2009
harley75 harley75 is offline
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Default drag pipes and ported heads

I have 1-3/4 drag pipes now with the heads being ported i was told to run open.But drag pipes are 5-7 thou in rpm now if i put 4' baffels in the pipe 6 inchs will this effect my jetting at all as far as low and mid power
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Old 7th June 2009
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Put lollipops in the drag pipes for better bottom and mid range performance.
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Old 7th June 2009
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Originally Posted by fdny37 View Post
Put lollipops in the drag pipes for better bottom and mid range performance.
I heard about that and it gave info on how to make them but i forget where i seen it.Do they still go 6'' in the pipe
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Old 7th June 2009
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My pipes had a hole about 4" from the very end of the pipe or just in line with the slash cut. I think putting them that far in would make it very difficult to install and work with. I have slash cut pipes and the lollipop is at the beginning of the opening of the pipe. You might have to drill a hole on the backside of the pipe.
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Old 7th June 2009
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Originally Posted by fdny37 View Post
My pipes had a hole about 4" from the very end of the pipe or just in line with the slash cut. I think putting them that far in would make it very difficult to install and work with. I have slash cut pipes and the lollipop is at the beginning of the opening of the pipe. You might have to drill a hole on the backside of the pipe.
I have a hole right back from the slash cut that was in there i guess when they made the pipes.I'll have to find the info on making them
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Old 7th June 2009
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You can just go buy a couple of eye bolts, that is what I did. Just be carefull about the angle and such as they may squeak a little bit at certain throttle...At least mine do and I can't seem to get it to quit...
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Old 7th June 2009
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Originally Posted by superwarden View Post
You can just go buy a couple of eye bolts, that is what I did. Just be carefull about the angle and such as they may squeak a little bit at certain throttle...At least mine do and I can't seem to get it to quit...
turns out i had two in my box put them in on a 11-5:00 angle and tighten them up
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Old 8th June 2009
Oldwrench Oldwrench is offline
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Default Lolly Pops

Two cents. What makes the washer of the lolly pop effective is not the area or shape, but the fact that they have sharp edges. If you want to cause turbulent air flow, make it pass over a sharp edge, the sharper the better. Tears the hell out of laminar flow and really breaks up pressure waves.

That's what makes straight cut AR cones work so well. Sharp edge around the opening. Sharp edge facing away from the engine.

Just two cents tossed in.
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