Turbo ex. manifold-pipe length

[350kmileford]

Is it a good idea to have equal length pipes going into the turbo? Would it help it? 'Hurt' it otherwise. .?

Also, what is a good thickness for the flange and piping?

 

[wallaka]

I don't think that it is very critical. Theoretically it is best, but packaging constraints generally preclude equal-length primaries.

A log manifold works quite well. That's what Does10s uses, I think it's Sch. 40 pipe.

 

[TCIC 300ci superbeast]

if you can a cast manifold would work the best. holds heat and is stronger.

 

[350kmileford]

I thought about headers, but I was told that it is best to get the turbo as close to the head as possible (while gas is the hottest) Again, not mandatory (i.e. sts kits)

 

[Does10s]

Equal length header tubes would be great! It would definitely help!
But usually with turbo systems the lack of underhood room will almost alway define how the header is designed.
A log style header works very well and it doesn't take up much room.
If the Falcon shock towers weren't there, I'd make a different header for sure!
We're using 14guage mild steel for our header tubing. The flanges are 3/8" thick.
Later,
Will

 

[350kmileford]

I understand the stock manifold is easy, but doesn't it flow like crud?

 

[wallaka]

You can make a log manifold that flows much better than the stock one. That's what he's done. They are typically made from Weld-Els gotten from a plumbing supply store. These are cast-iron pipes. Get at least Sch. 40 thickness, mind.

Bort62, Linc's200, kirkallen143 and Hasa68mustang all run the stock manifold and haven't had any problems with it. Yes, it could flow better, but it is adequate and dead simple to adapt.

 

[Bort62]

I don't know if I would try to make a manifold out of cast Iron plumbing pipe.

My next manifold will probably be out of 3/16 steel plate, waterjet cut into various pieces and welded together.

Think a hogan sheetmetal intake, but for the exhaust.

We shall see, however. A log might end up being a better choice.

That's all next year. This year is body & interior.

 

[gravelrash]

hope this helps, this is mine

 

[wallaka]

I don't know if I would try to make a manifold out of cast Iron plumbing pipe.

My next manifold will probably be out of 3/16 steel plate, waterjet cut into various pieces and welded together.

Think a hogan sheetmetal intake, but for the exhaust.

We shall see, however. A log might end up being a better choice.

That's all next year. This year is body & interior.

I've never done it, but I have heard of it from multiple sources. I'd probably try it if I had a good welder.

 

[Bort62]

It depends completely on the grade of the cast iron.

Some welds really nicely, and some welds like absolute crap (like the stock manifold).

Nice manifold Gravelrash. Good inspiration.

 

[Anonymous]

gravelrash,

Nice pictures of header. But what material is it made from and where might one get such tubing?

Thanks.

 

[350kmileford]

Would equal length pipes still be more efficient if the centermost pipes required a nice bend or two simply to take up the 'excess' pipe?

 

[wallaka]

As far as I know. I don't think it'll make that much difference for a street car, but it might pick up a tenth or so at the track.

 

[hasa68mustang]

Bort62, Linc's200, kirkallen143 and Hasa68mustang all run the stock manifold and haven't had any problems with it. Yes, it could flow better, but it is adequate and dead simple to adapt.

I have run 2 seperate factory manifolds for turbo setups, both are still around and my first is a couple years old.

 

[Anlushac11]

8)

I bought Mustang Geezers old tubular header. I was planning to get a log with a turbo flange welded on it and then get it Jet hot coated to retain the heat.

While I understand a T4 would probably be better I have access to two T3's at no cost. The first is a 83 Turbo Coupe that has integral wastegate and IIRC is set at 12 lbs boost and has a A/R of .45 (.48?). The other is a 87 Turbo Coupe that has a T3 without a wastegate and IIRC has a A/R of .63.

 

[Bort62]

Go integral wastegate