Hey,

I'm new to this forum and don't have alot of experiance with diesel engines, so please excuse my ignorance. I just bought a '92 f-250 with a 7.3 IDI and a Banks Sidewinder kit and I am trying to figure out what kind of boost I should expect to see from it. The truck is a 5 speed and the most I have ever seen the guage hit is about 6 psi, and that was in 5th gear at about 2500-2600 rpm. Is this normal or should I be getting more out of it? I have seen other threads about guys getting 25+ psi... What is a typical normal boost pressure?

 

Which sidewinder, non wastegated or wastegated?

 

Non wastegated, it seems to be an older system than the pictures I have seen on the banks website too. It has a large flat rectangular air filter housing with the sidewinder logo on it, not the black round cylindrical type I have seen in pictures...

 

boost is dependent on load and exhaust back pressure.

normal driving you will see very little boost.
towing 17,000 lbs up a 15 degree grade with no muffler, and you may see 16 lbs boost.

 

you could check for any pre-turbo exhaust leaks or any boost leaks. that 25psi is out of engines outher than IDI's. need some intense mods to do that safely and reliably.

welcome to the forum btw.

 

He could be referring to my IDI

at any rate, its a far from stock IDI.

 

notice right after i said that it would take serious mods to do it to an idi?

 

The most i've seen out of my non-gated Bank is 13psi. That is full throttle empty.

Cruising I only see 1-2psi.

 

Would an exhasust leak AFTER the turbo make a difference? I haven't seen anything before the turbo, but there is definitely a large one under the cab of the truck... I was just thinking it might possibly alter the proper flow? if that makes any sense?

 

no.........

 

I've owned one for 3 months and the last owner said it made 21lbs

 

and i bet he told you it also gets 25 mpg.
the best i have ever seen out of my stock 7.3 was rite around 18. but that was wound tight and could not go any more.

 

Ya'll realize this thread is 8 years old, rite?

 

i do, bit the post i was replying to was made yesterday

 

And old or not, the 21psi is still just as funny.