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  #1  
Old 13th April 2018
Iron John Iron John is offline
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Default Ironhead 2 into 1 exhaust?

I'm working on a '73 Sportster bobber/track project. I've been all over the net looking for a nice 2 into 1 exhaust that fits the look. Can anyone help? Everything that has the right look seems to be made for later models. Thanks!

I do have the custom option of using 2 old sets of drag pipes and cutting them up and/or using a kit, but I'm looking for something nice and done if I can find it.
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Last edited by Iron John; 13th April 2018 at 18:06..
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  #2  
Old 15th April 2018
northern bobber northern bobber is offline
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here is a thread with what i buildt last winter for my -77
http://xlforum.net/forums/s....php?t=2061289

I was also looking for something ready done, but couldn't find anything i really liked. I also wanted to keep a specific length on them. I basically used up a set of drags and a 2" collector and a few curces i bought. didn't put more than 30e into them in parts plus the wrapping.
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  #3  
Old 15th April 2018
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iNSaNeSHaNe iNSaNeSHaNe is offline
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Default

Here is a pic of what I made for my 85.






This is a rear pipe for a late S model. I cut the flange off and welded the end of an old 1-7/8" drag pipe to it. The front pipe is a drag pipe with the same size pipe as the other one I cut off then I step it up to a larger 1-15/16" piece from another drag pipe and then merged it into the bottom of the bend of the rear pipe where it becomes 2" the largest step before entering the chamber 2-1/4" where I have a louvered baffle to help tune the back pressure. ( I started with an 11" baffle and cut it down to a 6" and also flattened the louvers about half way down )

I got the rear pipe off Fleebay for $25 and the old drags I had just lying around so was a cheap pipe to build.
It added a lot of torque judging by my but dyno and actually didn't notice any top end loss after I tuned it a bit.
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  #4  
Old 16th April 2018
Iron John Iron John is offline
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Good stuff. I guess I'll have to bite the bullet and make up something custom. I have two old sets of drag pipes to work with.
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  #5  
Old 16th April 2018
northern bobber northern bobber is offline
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Quote:
Originally Posted by Iron John View Post
Good stuff. I guess I'll have to bite the bullet and make up something custom. I have two old sets of drag pipes to work with.
with that you dont need more than maybe one 90 tight bend and one larger around the cone, one collector with 2" out and then whatever you feel like putting at the end.

I made some tools. I took t-bolt clamps (cheapest ones i could find) and drilled large holes in the sides. 3 holes per clamp. Large enough just not to brake the clamp. Then you can cut and create the pipe and twist it and always tighten down adn still go back and change settings. When done, you just point weld them thru the holes and they hold together. Mine came out perfect bend wise that way. I also put a lollipop inside the 2" end pipe to brake the reversion. Seems to work real good. Might try out a supertrapp at some point but for now these seem to make the shit fly.
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  #6  
Old 16th April 2018
Old Junk Old Junk is offline
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Default Exhaust

Hey Iron John,

I've got a NOS muffler and a not-so-perfect header collector for a 1978 Sportster that I've been looking to part with. Throw me a p/m. i'd like these things to find a good home.
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  #7  
Old 16th April 2018
Iron John Iron John is offline
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Northern, would you happen to have pics of the clamps you made? I'm trying to wrap my head around what you did. I was planning to use Clecos with some play for adjustments.
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  #8  
Old 16th April 2018
northern bobber northern bobber is offline
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Quote:
Originally Posted by Iron John View Post
Northern, would you happen to have pics of the clamps you made? I'm trying to wrap my head around what you did. I was planning to use Clecos with some play for adjustments.
I looked but didn't have a pic and the clamps are at my garage. But basically the clamps are of this style

LINK TO CLAMPS

Then I drilled with a cone drill on three sides of the clamp big holes. Then you just leave the seam where the pipes meet in the middle of the hole. The wider clamps you find the better.
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  #9  
Old 16th April 2018
Iron John Iron John is offline
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Perfect, thanks! I had been thinking of another type of clamp and understand now. This should make things much easier.
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Old 16th April 2018
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83XLX 83XLX is offline
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Default

Look back at post #6 by Old Junk. I'm pretty sure he has a factory 2-1 he's offering to sell you. You probably don't need the big muffler, but the head pipes are almost exactly the same configuration as the ones others have posted here. It would save a lot of fab on your part.
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