Ironhead Connecting sportyparts 2-in-1 exhaust

[ericfreeman]

Yeah, looks like they welded on the stub pipe without noticing that it hadn't been swaged open to accept the other pipe. As an aside, while that setup might look cool to some, the flow has to suffer greatly without any type of collector to join the pipes. Just my 2 cents worth.

[Roane]

Thanks. I actually got it in there after putting a little oil on it. I guess I just wasn't trying hard enough. Should I put some high heat sealer on the inside of the outer tube when I connect them?

[Ferrous Head]

The one saving grace on a slip fit is the inside tube is closer to the head, the heat source and so it normally gets hotter than the pipe it fits in to. This means it expands more and makes for a tighter fit.
Now in the case of this system, the rear exhaust pipe runs into a wall just after the junction. That will create a hot spot at that point.
I would expect to see some blueing there in the future. (Once you start the engine).

I could probably design a worse exhaust system myself.




Nah, just kidding. I couldn't.

[Roane]

Well, I always have my straight pipes to fall back on....

[Roane]

So, while acknowledging the design issue, I did get them on. Seems to be a bit of a n exhaust leak at the head despite me throwing some permex up there. Can I cure with tape possibly? I don’t see more permex helping.

I had a bit of trouble securing them, which I’ll deal with but …




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[Ferrous Head]

Don't know if it's just the photo but looks to me like the length of the muffler and the angle of the dangle will have the exhaust touching the tarmac at anything above a 30 degree angle. Right hand corners might be a big ask.

If the slots in the header pipe are wide enough and the clamp is strong enough they won't leak. Some headers come with only two slots in them. I generally add another two. And I use the very solid aircraft style clamps. Do them up TIGHT.

[doodah man]

Originally Posted by ferrous head

don't know if it's just the photo but looks to me like the length of the muffler and the angle of the dangle will have the exhaust touching the tarmac at anything above a 30 degree angle. Right hand corners might be a big ask.

If the slots in the header pipe are wide enough and the clamp is strong enough they won't leak. Some headers come with only two slots in them. I generally add another two. And i use the very solid aircraft style clamps. Do them up tight.

+2

[Roane]

It may be the angle, although the muffler is definitely adding some length and is a bit chunky.

It they come with two wide slots, and I’ve got my older aircraft-style clamps, but feel like I should get new ones that are maybe a bit wider. Any suggestions there?

The pipe was very difficult to manipulate and not malleable, as I had a hell of a time getting it on the front cy handed, so may not be cinching tightly enough on the back, which was easy.

All in all, may have been an expensive mistake of course. I’ve had straight pipes on it since 1989 and just thought it was time to grow up.

Opening up a can of worms here but curious what the most efficiently designed pipes might be for an iron head that don’t require modification?


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[forqueue]

Looks-like the downward slope of the pipe is from not having the ~1" or so slip-fit where the rear enters the main pipe. Definite production flaw and -may- be related to the header not sealing. As far as clamps, there guys make a brute of a clamp. Kinda pricey.
https://www.amazon.com/gp/product/B0...3VVCF64S3&th=1

[needspeed]

The lower section of your pipe looks like it runs mostly parallel to the lower frame rail. That's probably as intended.

The gasbox pipe that Chuckthebeatertruck gave a link to in your previous post is supposed to be a replica of the OEM #65454-57. You can see that there is a slight upsweep just to the rear of the rear pipe junction that puts the muffler higher than the sporty parts pipe.

http://xlforum.net/forums/showpost.p...5&postcount=16

If you find the low muffler position objectionable perhaps you could cut a small amount off the bottom of the rear pipe so that when inserted all the way into the lower pipe it raises the muffler a bit?