914-SHO 3.2 Exhaust doesn't fit

[3d914]

Well I recently met up with jbruso and scored some decent used exhaust and muffler for my bench test of the 95' 3.2L. Thanks Jeff!

Weird thing is, the y-pipe won't line up with my exhaust manifolds. I'm thinking one of them has to be wrong. Maybe the back one.

Y-Pipe

Front looks right

Not sure about the back one

Thoughts?

 

[Phoenix]

Seems you have 2 fronts.

The front and back manifolds are different.

Plus , the 3.0 and 3.2 are not the same either. so make sure you have the manifolds to match the Y pipe (3.0 manifolds with 3.0 y pipe)

 

[3d914]

I know the Y-pipe is from an ATX, but it was a GEN-I. Since I'm just using the pipes for bench testing, I'm not worried about other down-the-line differences. I'll have to see about locating a rear manifold.

Thanks

 

[kevinspann]

Gen 1 SHOs didn't have an ATX...the ATX started in 93. That rear one does look a bit odd. Are there any part numbers on it?

 

[pitaSHO]

What Phoenix said. They are both front manifolds for an ATX. The rear manifold should be pointed toward the shallow part of the oil pan. That's where the y-pipe crosses under the motor.

Chris K.

 

[rbruso]

I have a pair of 3.0 manifolds if you want them. I'm starting engine teardown on the parts '91 today, so I should have them off either today or tomorrow (if all goes well). They should bolt up to the pipe.

 

[Off Road SHO]

I have an untold number of manifolds. I'll locate one from the rear of an 3.2 and put it with the radiator that is going to Tucson.

The Y-pipe has to be from an ATX SHO also to line up properly. I don't have an ATX Y-pipe; but to solve your problem I could bring down some MTX headers also, to go with your MTX Y-pipe. In that way you can use what you need to make it fit and return the rest.

Tom

 

[3d914]

Thanks all. bruso, I thought this y-pipe was ATX - right?

 

[rbruso]

Nope, it's from a 3.0 MTX. But a pair of MTX manifolds will bolt right up. Only thing is that thMTX manifolds I have spare are off of a CA car, so they have EGR that would need t be blocked off.

Sounds like Tom has some. Perhaps he has a non-EGR rear MTX?

 

[3d914]

Tom, I'd like to keep the 3.2 manifolds for the finished exhaust - though I am willing to trade the one front for a rear. Can I get a picture of the rear 3.2 manifold?
Are the external heat shields the same for both - as I've polished mine? Gotta have a little bling.

Rich, if you've got spare 3.0 manifolds for this Y-pipe, then I can go with those. I can down that way next weekend.

 

[Shovert]

If needed. I have a set of 3.2 and one extra of the one that is close to engine. They have the shields on them. Just PM if needed. No cost useless to me pay shipping.
I created these. Not a perfect header but almost no cost in them. Good enought until get running and see how it goes. Maurice
http://i177.photobucket.com/albums/w224/mgman75/93 mustang converiable/sep42011109.jpg

 

[3d914]

Maurice, sweet headers. Did you have to go to 3 inch exhaust to combine the three manifold pipes?

I've got a couple coming over from Tom along with a radiator for bench test. Thanks for the offer. I'm planning at this point to go with 2.5-2.75 Y-pipe, then same for single exhaust/muffler - keeping the single tail-pipe look. May change as I learn more.

Right now just be glad to get it set up with stock pieces to test engine & wiring. Sure is going slow.

 

[Shovert]

They are shorty header from a 3.8. Flanged removed 3.2 ****** welded on and some piping added. The downpipe part was a odd size slightly smaller than the 3". Originally had ****** and bolts. I hate them. So welded 3" and cut up 3" Mandrel u-bend. Going to use band clamp to hook exhaust up and then go to y and single exhaust pipe. I used them on my 2.3 turbo Mustang. Maurice
http://i403.photobucket.com/albums/pp115/mustanglady89/100_6402.jpg

 

[3d914]

Ran into some interference problems with the MTX headers & Y-pipe. Documented the details and pics over here.

The result is that I'll be finding some 2" mandrel pipe and bends to build my own Y-pipe. I'd like the Y-pipe to cross between my engine bar and the oil pan. Can I fab my crossover to be closer to the oil pan if I plan to wrap it with some insulating material?

Another thought would be to cut up one of the header heat shields to fit between the crossover pipe and the oil pan and mount it to my engine bar.

 

[3d914]

Maurice, is the band clamp used to join sections or do you use to hand the exhaust also?

 

[Shovert]

It holds the pipes together at 2 points. On the 2.3 turbo I have one at end of turbo elbow. I got a 3"90degree instead of stock turbo elbow and one at bottom of 2nd 90 to connect to exhaust system. That is picture in other posting. Picture of turbo elbow.
http://i403.photobucket.com/albums/pp115/mustanglady89/100_6308.jpg
It holds the pipe together with no other brackets and no leaks. Something I never got with the stock turbo elbow.
On the sho I plan on using 3 of them. One at end of header and another at end of Y to rest of exhaust. Does that answer you question. Maurice
I got mine from local NAPA but here is example. Note Stainless Steel material something I really like on exhaust system.
http://www.summitracing.com/parts/DTC-789-70300/
EDIT I found this link Isn't this your type car with a SHO motor. I just ran across it. Was totally unaware of it.
http://www.network54.com/Forum/12159/thread/1207387282/Anybody+want+to+help+me+install+a+v6+engine-

 

[3d914]

I got you. So these are preferable over the tri-bolt or double-bolt flanges. Cool. I'll have to look into that for my Y-pipe & final exhaust.

 

[Phoenix]

I used the 3 bolts flanges and its not that good for custom exhaust , if your are one degree off it will leak.

Thats what I got and it leaks , The best stuff for joints is the spherical ones (one end is like a ball) , this plays with angles an vi brations and will never leak. Its pricey though

 

[Shovert]

I agree totally. That is reason I done what I did on the 2.3 turbo. Maurice

 

[3d914]

OK, worked out the down pipes for the bench test and the final exhaust. For the bench test, I'll likely go with the MTX pieces & merge pipe.

For the final, I've mocked up using PVC with back (right) header which fit best and gave me the most room to work. It ended up being the MTX header since its shorter than the others and drops straight down. The ATX points into the oil pan & I need it to point away from it.

Left side. Piece of square 1.5" steel represents the engine bar. Don't want to weld it until I test fit in the engine bay.


Front. Could have come straight down with the right pipe, but need an extra inch of clearance when its on the engine cradle during testing.


Right (back)


This exercise leaves me with a couple of questions. The ID at the header is 2", yet the down pipe pieces I have and the MTX pipe are all under 2" OD - making them even smaller for ID. I don't get it - why restrict it once its out of the headers -why didn't Ford continue with the 2" ID?

The ****** pipes at the bottom of the headers are 2" ID & 2.5" OD. Can I use 2.125" ID for the down pipe instead of the 2"? I plan on merging them into a 2.5" OD for the rest of the exhaust.