Hi everyone,
Stumbled upon this site while researching things about the new truck I just picked up. It's a 91 F350 Dually ZF5 trans, 120k miles with a Hypermax turbo kit. Here's a brief summary about what I know about the truck. Had a Hypermax turbo kit put on back in 05. Prior owner had some medical conditions that didnt allow him to drive the truck after that, so it sat tucked away in a garage for 9 years until last year the new owner bought it. It was a no start deal, and had been taken into a diesel shop and they found rust in the injection pump, so the pump was replaced, along with the injectors and glowplugs. I believe the tanks were dropped and flushed as well. This was done last fall.
Fast forward to Last week. I checked the truck out and couldn't pass it up, super clean and seems to run really good for an old girl. I did however notice when driving it watching the boost gauge that it was real tough to hit 5-6lbs of boost, and that was near 3k rpms in 3rd-4th gear. Didnt notice it blowing any smoke either. EGT's near 1000ish maybe a little higher. Thought that was awful low for boost numbers.
Today I gave hypermax a call to explain what was going on, and he asked me if the truck was blowing a black smoke and I told him no. He advised that the pump probable needs to be turned up and that it should be making around 12lbs of boost.
The previous owner included receipts for the recent fuel system work that was done so I called the shop up to ask a few questions. He advised me that the injection pump that was installed is 20% over stock (not sure if that means it was turned up a couple flats or that the pump comes from the manufacturer with a higher calibration then stock?) And that the injectors were replaced with factory IDI turbo injectors from a 94 model.
Should I try turning up the pump a couple more flats on the hex? Would giving it more fuel give me more boost?
I have yet to pull the air cleaner off to see if there are any loose connections on the compressor outlet or maybe a worn boot or something. Just would like some insight before I dive into the project. I bought the truck to haul ~7k pound load on weekends. I sold my 99 PSD which towed great, I'm hoping this will do better being a dually.
Thanks!
Stumbled upon this site while researching things about the new truck I just picked up. It's a 91 F350 Dually ZF5 trans, 120k miles with a Hypermax turbo kit. Here's a brief summary about what I know about the truck. Had a Hypermax turbo kit put on back in 05. Prior owner had some medical conditions that didnt allow him to drive the truck after that, so it sat tucked away in a garage for 9 years until last year the new owner bought it. It was a no start deal, and had been taken into a diesel shop and they found rust in the injection pump, so the pump was replaced, along with the injectors and glowplugs. I believe the tanks were dropped and flushed as well. This was done last fall.
Fast forward to Last week. I checked the truck out and couldn't pass it up, super clean and seems to run really good for an old girl. I did however notice when driving it watching the boost gauge that it was real tough to hit 5-6lbs of boost, and that was near 3k rpms in 3rd-4th gear. Didnt notice it blowing any smoke either. EGT's near 1000ish maybe a little higher. Thought that was awful low for boost numbers.
Today I gave hypermax a call to explain what was going on, and he asked me if the truck was blowing a black smoke and I told him no. He advised that the pump probable needs to be turned up and that it should be making around 12lbs of boost.
The previous owner included receipts for the recent fuel system work that was done so I called the shop up to ask a few questions. He advised me that the injection pump that was installed is 20% over stock (not sure if that means it was turned up a couple flats or that the pump comes from the manufacturer with a higher calibration then stock?) And that the injectors were replaced with factory IDI turbo injectors from a 94 model.
Should I try turning up the pump a couple more flats on the hex? Would giving it more fuel give me more boost?
I have yet to pull the air cleaner off to see if there are any loose connections on the compressor outlet or maybe a worn boot or something. Just would like some insight before I dive into the project. I bought the truck to haul ~7k pound load on weekends. I sold my 99 PSD which towed great, I'm hoping this will do better being a dually.
Thanks!