Dual Out pipe diameter ???

[Anonymous]

Quick question.

I have a set of Pacemaker Dual out headers on my 66 I6.

Problem came up when I was getting the exhaust piping fabbed. The dual out pipes are smaller than 2" in diameter. I bought two 2" butt joint connectors from summit and they were too big, even when tightened down.

Would anyone happen to know offhand the exact OD of the dual out exhaust pipes...after the collector?

My pipes are currentkly welded on, but I'll need to add a connector in there if and when time comes to pull the engine.

Thanks,
Steve-O

 

[Asa]

Steve, what brand pipe clamps did you get?
i just did a quick test fit of mine, they fit fine with just finger pressure, after actually tightening them down i'm sure they'd be more than enough

do a search at summitracing.com for 33228 and you'll come up with the kind i have

 

[Anonymous]

Go to the local parts store and raid the shelf where all the exhaust bits are. You are bound to find something that fits.


Measure the diameter yourself. You can DO IT!

 

[hasa68mustang]

I bought a pacemaker header and I went to autozone and bought 2 18" long pipes and 2 thrush brand glass packs and everything fit perfect... everything was 2" Anyway good luck....

 

[addo]

Tommy, that extra weight can't be good for the poor headers. Put a small extension on them, with turndowns or something - just for the support.

Adam.

 

[Anonymous]

I will check all ideas...thanks...

 

[bdj66]

I used 2" on my mustang with dual Borlas and they sound great, with the Benini headers!

 

[hasa68mustang]

Tommy, that extra weight can't be good for the poor headers. Put a small extension on them, with turndowns or something - just for the support.

Adam.

Adam what would an extension and turndown do for them? I could see if I made a bracket and made it hold some of the weight, I just glanced under there and didnt see anytihng I could use for a braket and figured I would have to weld it, which for now... wouldnt be feasable for the carpet and all... Ill have to look again..., Thanks, Tommy

 

[Asa]

an extension would let you run it farther back to a place where you could either weld without damaging the carpet, or actually just drill in a bolt hole

 

[Anonymous]

Here are some pics of the problem I'm having.
I used 2" butt joint muffler connectoirs from Summit. Pic 1.
The header out pipes are the next two pictures. You can see the jet-hot ceramoc coating.
The fit is loose with no room to take up any slack as the joint is pressed together already.
The last pic is the connector on a piece of standard 2" pipe. Nice fit.

So the pipes out of a dual out pacemaker header are definitely not 2". More like 1 3/4".

Any ideas...I've haven't found a connector for smaller than 2" pipe to 2" pipe.

Steve-O

 

[Anonymous]

Auto parts stores have exhaust connectors all the way down to 1.5"


A piece of 2" OD will have a 1-7/8" ID
1-7/8" OD is 1-3/4" ID
1-3/4" OD is 1-5/8" ID


You just have not been looking hard enough. Try a different parts store, or just go to the muffler shop.

AND GET A RULER AND MEASURE THE OUTLET!! Quit being lazy about it.

 

[Asa]

AND GET A RULER AND MEASURE THE OUTLET!! Quit being lazy about it.

chill out man, he's not being lazy
the shop welded the 2" pipe to the headers, he can't measure it unless he wants to get into all that geometry crap

and you're not paying attention to the problem here, he's not asking where he can get a connector, he's asking why the pipe diameter is not 2"
and that's the main issue here, why is the pipe smaller than 2" in the first place, it's advertised as 2"
not that i'd blame Mike anyways, why measure out the diameter of the pipe? especially considering how many of 'em he moves

 

[Anonymous]

Thanks Evan. I also e-mailed AzCoupe (Mike) and let him know what I found.

I guess you'd have to know me and how much I've done to this car to realize I'm not lazy....wish I was...

Then this would be my self portrait....ahhhhhh...

Just kidding...

Steve-O

 

[Asa]

i'm wondering if it was a header possibly designed for a smaller engine... i don't think the Aussies had the 144 or 170, and if they did i can't really see someone making parts for 'em...
i wonder what the deal is...

 

[Anonymous]

My pipes are currentkly welded on, but I'll need to add a connector in there if and when time comes to pull the engine.

Sorry, I missed that ^^^



I wouldn't bother with a slip connector, given the need to splice two pipes I would add a bolt-together flange instead of a slip joint.

 

[Anonymous]

A bolt together flange is a good idea, but would require a trip to the muffler shop. I was hoping to be able to make a cut with a sawz-all and do it myself.

I guess I'll put that on my list of "To Do's"

Steve-O

 

[AzCoupe]

Sorry I didn't reply sooner. Been working to many hours.

That's really strange. I'll measure some of the other headers I have in stock when I get home (still working). I suppose it is possible that when they were assembling them, someone screwed up and thru a set of 1.75 pipes into the wrong pile and no one caught it. Just a thought.

Never had a complaint or problems, so its not a usually type thing. But stanger things have happened. Bottom line is how to correct the problem. Let me think on it, on the way home from work.

Why did you weld them, that's not so good on the ceramic coating ? And, if they weren't welded, you could slip a reducer in there.

I'm assuming you don't have a caliper, so you could measure the pipes?

 

[addo]

The only ones I know of with a 2" outlet are the Genie and Ford OEM single outs. I just assumed that the pipes from the collector are 1¾". Interesting!

 

[AzCoupe]

I just got home and headed straight to the garage. I measured seven different sets, all are 2". Actually with the caliper, they were anywhere from 2.000 to 2.002

So my next thought, if you are not able to measure the header pipe, then obviously you are not able to measure the exhaust pipe either. Are you sure it is the right size? Possibly it's 2.25" ???

I think the next step is to buy a set of cheap plastic calipers and verify the pipe size on each. Or make a GO - NO GO gauge from a block of wood (1x4) and check.

I will say that if the headers are not 2", then you are welcome to send them back and I will replace them. You need to verify the sizes of both pipes first, but it is possible they are a mis-made set with smaller pipes.

 

[Anonymous]

I will say that if the headers are not 2", then you are welcome to send them back and I will replace them. You need to verify the sizes of both pipes first, but it is possible they are a mis-made set with smaller pipes.

I would think that smaller tubing would be better for low end torque, he might want to keep them!!