HI Everyone : I am wondering how much a 1994 7.3 turbo has, because I get 9 lbs . when I stomp down on the skinny leaver I have heard guys getting more bost by adjusting there wast gate an also by new turbo veins . I have a 1994 F 350 IDI turbo it has about 207,000. What the best way to go here thank you for your help. Rick

 

Rick the best way to get performance from these engines is to first insure that they are properly in tune.
this means the ip and injectors have under 100k on them,and that the timing is properly set.of course clean exhaust systems (no old muffler that's plugged up) clean fuel and air filters.
once this is done,then you want to adjust the fuel settings and wastegates.

i recently visited (just yesterday i guess it was lol.been hitting a lot of shops getting quotes and ideas) an autobody shop.they just bought a nice used 9th gen idi truck.
it was N/A and they asked how mine went because they couldn't tow a chevy duramax truck outside of 2nd gear with their idi.they asked me if it was worth tuning them up.
i went for a ride in his (had the Zf5) and after a 1/4 mile,he says see what i mean? it's been on the floor this whole time lol.
we went back,and i said now hop in mine..........he understands how they should go now.
he's got the wrecker body on his,and a large dump on mine.i dunno what he weighs,but im 8k empty.i probably had a few lbs on his.close anyway.i should have offered to tune up their engine in exchange for body work.that was dumb lol.

anyway,the point is.if you don't start with a fresh tune,your masking issues the whole way.his injectors are so shot i was surprised she even moved the truck,let alone towed anything in 2nd with that ZF5.
tune up first.tweak latter.that way,that turbo will be adding power,rather than compensating.

 

Hey thank you . I did replace my motor at 177.000 an I put in new injectors in it an I have a good exhaust , an I have to turned the guys at the shop said my IP was good an did not need any thing done to it . So is it worth turning up my IP or adjusting my wast gate . Rick

 

If that's what you want, then yes, i guess it would be worth "it."

 

I am wondering if that is good boost or do I need to look at why it is low .

 

No, that's good boost for a factory turbo. If you go much higher, you'll risk blowing head gaskets. To go higher, you'd need to put head studs in it... Do you have a pyrometer? What exhaust temps are you seeing?

 

Turning up the fuel will help and also give more heat in the exhaust to spool up quicker. Heat is what makes the turbo work, not volume. As cautioned, if you get crazy on the boost your head gasket becomes the weak link.

 

Heat is definately not what makes the turbo work...

 

Hey Thank you that really helps I do have a pyrometer an a tranny an boost gauge . I think I will leave the turbo alone . Now if I turn up my fuel will I get better miles from my tank right now I am getting about 13 mpg . Thanks a again for all your help.

 

what makes the turbo work then?

 

No, your right foot is the only thing that helps, assuming a properly running truck. Turning up the fuel increases how much fuel is delivered for a given throttle position. Performance gains can be had by increasing the fuel to the max that can be burned with the available air. In effect, when you turn the fuel up, it's like the power that used to be at full throttle you now get at 3/4 or 7/8 throttle. Be careful though, it's easy to get EGTs to skyrocket...

 

It is the ammount of exhaust gasses (cubic feet per minute) pushing by the turbine, in general heat is a bad and the lower egt (exhaust gas tempature) the longer your engine will last. That is the whole reason for innercoolers, to lower your intake air temp effectively allowing you to compress more intake air and also lowering your EGT. A turbo works similar to a jet engine the turbine is the key to the system if the turbine spins faster the compressor spins faster in turn creating thrust/boost.

 

Heat doesn't directly make it work... The greater the volume & pressure, the faster the turbo spins. As the exhaust gas cools, its volume & pressure decrease...

 

Also timing is a huge factor in engine performance if your truck is out of time it will be gutless and sound like a gas engine if you don't hear that diesel rattle you won't get any power. I just went through it with my black truck I didn't even know anything was wrong till I drove my other truck and wow what a differance loud and noist and plenty of power.

 

Guys youre kinda right and kinda wrong by the way i was taught. The heat waves DO about 50% of the work, and the volume does the other half. You have to have the right velocity for both the heat and volume.

We keep up pipes short and wrap them and dunk em in ceramic paint to keep more heat in. More heat = more boost, note: this is why remote setups are generally a poor idea.

Inter-coolers lower egts only by burning more fuel, over fueling creates heat. The IC lowers the intake temp, making the air denser, cooler denser air = more oxygen which of course = more power.

I would turn up your wastegate until you only get a light haze out the exhaust at WOT. You might also turn the fuel up more. 9lbs is normal in stock form, but more can be had from them, i wouldnt go much over 15lbs... if any.

Mike