I just but a 94 f350 quad cab long bed with a idi 7.3 factory turbo. I was woundering if it would be worth it to add an inter cooller I've been told the turbo doesn't put out enough volume for an inter cooller. I was alos woundering what the differnce between the ats and stock turbo outlet were and if any one had any pictures of the two. And what exactly is different about the ats turbine housing?

 

The ATS turbo outlet is on the left, the stock Ford on the right.
The housing is the same on both, Ford adapted the ATS turbo for their trucks in 93.
To gain extra clearance between the fire wall and engine block, Ford also smashed the downpipe almost flat.
ATS uses a 3" round downpipe which flows much better.

An intercooler will give some small increase in power, the volume the turbo puts out is not the issue.
The pressure that a stock IDI can handle is low, so the amount of heat the turbo adds is not enough to make the intercooler a cost effective addition given the power return.

 

Thanks dave

 

Does this turbo set up have awaste gate? I am wondering if I can run a turbo on my 7.3 with out a waste gate.

I know I need to keep pressure below 15 psi and will install turbo pressure gage and pyrometer to monitor engine.

 

Yes it has a waste gate, you can see the arm on the stock turbo outlet flange left side.

Several turbo systems use non wastegated turbos, the older ATS and Banks units were that way.
I think the Hypermax turbo system is still that way.

Wastegates are a good thing, it lets the turbo build boost faster at lower RPM's, but limits the boost at high RPM's to prevent engine damage.

 

how much of a power will the ats compressor housing free up?also how much is one of those?

 

I noticed a big difference in response when I did the upgrade along with ram air and 4in exhaust. The truck feels like a big block gas motor. I have to lay off the pedal to get descent mileage. The DPS turbo calibrated pump helped as well. Actual HP ratings will vary quite a bit from truck to truck and depends on the condition of the motor/injection pump and injectors. The housing set is around 585, exhaust will run another 4-5 hundred.

 

does it take the ats specific downpipe tp fit the ats comp. housing? as i've already modified the ats downpipe to fit the stock comp. housing. thanks, pete

 

The downpipe from the ATS kit is a mandrel bent 3" piece of tubing and is designed to slip fit into the compressor housing (no mechanical connection). Can you be more specific about how you modified the downpipe?

 

Did ford drop the compression ratio when they added the turbo to the 7.3s?

 

is the OD of the ATS turbo 3 ".thanks

 

The compression ratio is the same for all 7.3 IDI engines.
Both the turbo model and the NA run 21.5 to 1.

The 1994.5 Power Stroke engine is when they dropped it down to 18 to 1 so they could stand more boost.

Some of the factory 7.3 turbo engines had larger wrist pins.
Both the 6.9 and all the NA 7.3 engines use 1" wrist pins.
Some of the factory turbo models have 1 and 5/16" wrist pins.
About the only thing that does is give you a lot more reciprocating weight that you don't need if you run the engine hard.

The ATS downpipe is 3" ID.
Every stock factory turbo I have seen had 2.25" ID downpipes, which they continued to use on the first generation Power Stroke engine.
And all of them look like a couple fork trucks ran over them before they were installed.
The first stock pipe that was actually round was on the 99 Power Stroke.
Sure took Ford a long time to figure out how good the engines really could run if they could breath.
ATS was way ahead of them.

 

i took the stock downpipe and cut off the "lip" and welded it onto the ats downpipe that was the only way to get the ats downpipe to connect to the factory compressor housing. thanks, pete

 

sounds like you will need a new downpipe if you go for the upgrade.

 

my 87 with hypermax turbo is non wastgate and will only produce 9 psi boost MAX... think the old 6.9 is wore out my in laws 7.3 non turbo 4x4 has more get and go than my turbo truck!!!