The turbo hooks up to the exhaust manifold. So, if I ran only one turbo on a SBC, what would I do with the other exhaust manifold that doesn't directly hook up to the turbo? Do I just run it back through the exhaust like normal? I'm seriously considering building a turbocharged engine, and I figured only using one turbo would be cheaper than going twin.

And by exhaust manifold, I mean headers because I wouldn't run stock exhaust manifolds on a turbocharged engine

 

Doesn't work that way, gotta plumb both exhaust pipes into the turbo (like an exhaust "y" pipe).

The advantage is that you have more leeway in the placement of the turbo - it can be almost anywhere you can run tubing to it. A single turbo system can easily cost as much as a twin - you may pay more for big tube plumbing, but only need one turbo (and big ones are definitely expensive).

 

Yeah I figured you would have to do that. So it would cost about the same to go with a twin turbo set up?

 

"So it would cost about the same to go with a twin turbo set up?"

Well, the answer is yes and no, If you are building a single turbo, you need to get something like a T72-T88 with pretty good size exhaust housing. This will be around $1200-$1600 If you buy it new. If you go twin, you can go with turbos that are around $ 600.00-700.00 each like a TE44 or a TE 60. When you go twin everything else is twice as expensive, you need two of everything like; the exhaust manifolds have to be custom made in a way where you can bolt on the turbo to the each side and still have enough clearance, two wastegate setup, two down pipe setup,two oil feed line, two oil return line, two pipes running to to IC, bla,bla,bla. a single turbo setup is less complicated. You realy don't need twin turbo setup to run fast, it sounds cool to say it but you can achive similar performance with the single turbo setup.If you talk to Harry at Precision Turbo and Engine, he will tell you to go with the single turbo setup.Less headaches.

HTH

Good luck

Prasad

 

Ok, well I'd probably get the parts off eBay or a junkyard and rebuild what needs to be rebuilt. I was just wondering if there's any pictures of the exhaust routing from people who only have one turbo.

 

There are different ways to go about it. You can do what these guys are saying, spend 4k and have yourself a turbo setup.

But what it seems like what you want to do, is exactly what Im planning on doing, and exactly what all JYTT mustang guys do. I have a couple friends who have built JYTT 5.0's, one has ran a 10.90, for less then 1500$.

You get some T3's from turbocoupes, internal wastegates (one less headache) Run the turbos right off the manifolds (Yes, stock manifolds, in stangs they are shorty headers, but stock manifolds flipped upside down may work just as good) You have to do the fabbing on this, but it saves you a ton of $$. If you're going for an all out drag car, fastest times, most powerful, and money isnt an issue, yes, get custom built turbo headers, but this is probably a budget project, this will save you tons of money.

Then run the piping to the intercooler, you may have a Y-pipe before hte intercooler, or have 2 intercooler inlets, and 1 outlet. This is a custom setup, do it any way you want, I am not sure on performance differences. But 1 rule of thumb, i think its every 90 degree angle, you lose 1 lb of boost. Anyways, if you're going carb, you have the piping come out of the intercooler, and into a carb bonnet. Right now, I have no clue what kind of bonnet I am gonna get, or if I'm gonna custom rig 1 up.

But, the bottom line is, with t3's from turbocoupes, an intercooler (maybe ebay) or you can custom make 1 from a huge diesel intercooler core. And then, either have an exhaust shop do the piping (look to spend around 200$ or more) or do the piping yourself.

This is probably the cheapest route to go. I am doing a twin turbo setup on a stock 305, leaving the stock bottom end in and plan on running around 8lbs of boost. Some peeps may think im crazy, but with the right tune, i should be producing enough power to propell me well into the low 12s, and could possibly hit a 11 traction permitting.

My setup.

1982 CFI 305 converted to Carb
Edelbrock performer RPM
Ported heads/intake
Dual 3' exhaust dumped at axel's
T3s from turbocoupes (very cheap, 150$)
Intercooler from Diesel turbo
8lbs of boost and a helluva lot of fun

Project cost = 500-750$
Look on mustangs face after i put 10 cars on him in the 1/4 = Priceless

Links

Turbomustang.com
Stangnet.com

Very good information for twin turbo setups, or turbo setups period, do your research, it'll make it a lot easier, and cheaper.

 

There are different ways to go about it. You can do what these guys are saying, spend 4k and have yourself a turbo setup.

But what it seems like what you want to do, is exactly what Im planning on doing, and exactly what all JYTT mustang guys do. I have a couple friends who have built JYTT 5.0's, one has ran a 10.90, for less then 1500$.

You get some T3's from turbocoupes, internal wastegates (one less headache) Run the turbos right off the manifolds (Yes, stock manifolds, in stangs they are shorty headers, but stock manifolds flipped upside down may work just as good) You have to do the fabbing on this, but it saves you a ton of $$. If you're going for an all out drag car, fastest times, most powerful, and money isnt an issue, yes, get custom built turbo headers, but this is probably a budget project, this will save you tons of money.

Then run the piping to the intercooler, you may have a Y-pipe before hte intercooler, or have 2 intercooler inlets, and 1 outlet. This is a custom setup, do it any way you want, I am not sure on performance differences. But 1 rule of thumb, i think its every 90 degree angle, you lose 1 lb of boost. Anyways, if you're going carb, you have the piping come out of the intercooler, and into a carb bonnet. Right now, I have no clue what kind of bonnet I am gonna get, or if I'm gonna custom rig 1 up.

But, the bottom line is, with t3's from turbocoupes, an intercooler (maybe ebay) or you can custom make 1 from a huge diesel intercooler core. And then, either have an exhaust shop do the piping (look to spend around 200$ or more) or do the piping yourself.

This is probably the cheapest route to go. I am doing a twin turbo setup on a stock 305, leaving the stock bottom end in and plan on running around 8lbs of boost. Some peeps may think im crazy, but with the right tune, i should be producing enough power to propell me well into the low 12s, and could possibly hit a 11 traction permitting.

My setup.

1982 CFI 305 converted to Carb (Holley 600 Blow thru)
Edelbrock performer RPM
Ported heads/intake
Dual 3' exhaust dumped at axel's
T3s from turbocoupes (very cheap, 150$)
Intercooler from Diesel turbo
8lbs of boost and a helluva lot of fun

Project cost = 500-750$
Look on mustangs face after i put 10 cars on him in the 1/4 = Priceless

Links

Turbomustang.com
Stangnet.com

Very good information for twin turbo setups, or turbo setups period, do your research, it'll make it a lot easier, and cheaper.

 

Most SBC exhaust manifolds run the 'log' part above the ports. If you flip them upside down they'll hit the spark plugs.

Some header flanges will work OK (assuming that you're not using D-port heads or headers), the biggest problem is that the flange might hit the senders in the heads.

Something like:

somewhat fits. You could mount the turbos forward with a U-shaped pipe and then run the down pipes under the headers (what I planned) or there is even room to mount them roughly like:
this will come very close to fitting under a firebird hood, and I'm sure that it will fit under a camaro hood (I have test fit it, it clears but is a bit close for comfort), but the down pipe on the driver's side would be a bear, and frankly, you'd have to get creative with the brakes (a manual brake coversion would take care of it).

In no way is it as easy as on a ford fox chassis car.

 

The whole purpose is to keep it all under the stock hood. For the sleeper look, until they hear the BOV's.

 

BillZ28, if that's in response to me, that does fit under the hood. That pic with the turbos just sitting on the end of the headers was done on an LT1, the TPI is 7" taller...

I've actually done the same setup on the car and was able to close the hood (it was touching one of the hood braces on the passenger side)