dyno numbers - Ford Powerstroke Diesel Forum

7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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post #1 of 12 Old 03-01-2008, 02:18 PM Thread Starter
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dyno numbers

I finally got my old truck to the dyno. It's a 91 7.3 IDI with ATS aftermarket turbo and 5 speed. I turned up the fuel pressure to the max, and cut off the muffler running a straight pipe.
I pulled 13 lbs of boost.
Horsepower 217.5 at the wheels (about 275 at the crank)
Torque 426.3 at the wheels (about 530 at the crank)

Howard
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post #2 of 12 Old 03-01-2008, 02:48 PM
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cool, those are pretty good numbers for the IDI?

2004 F-250 6.0
SCT running Extreme Street from Innovative, 4" straight pipe 6" tip, ISSPRO Pyro and Boost guages, Zoodad, Omega remote start, sirius radio
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post #3 of 12 Old 03-03-2008, 06:46 AM Thread Starter
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cool, those are pretty good numbers for the IDI?
I am pleased with these numbers.
Howard

I have a video if I can figure out how to post it....
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post #4 of 12 Old 03-03-2008, 10:26 AM
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Those numbers look good Howard!

Fletcher
'90 F250 Supercab IDI 7.3
Banks Sidewinder Turbo
4'' straight pipe
116,000 miles

'94 F250 single cab IDI Factory Turbo 7.3
3'' banks down pipe
Banks pyrometer
3 1/2'' straight pipe
K&N Air filter
Hypermax air intake
Hydrogen Generator
Pump turned up
Timing advanced
315,000 miles!



'89 F250 4x4 supercab 7.3 IDI
4'' exhaust
pump turned way up!!!
297,000 miles
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post #5 of 12 Old 03-03-2008, 10:27 AM
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Sounds good man! ! !

Looking for 05-07 front end with Harley Lights
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post #6 of 12 Old 03-03-2008, 10:48 AM Thread Starter
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Here's what I figure.
Comparison to stock trucks.........

More power than
1982-1993 GM 6.5

2001-2003 GM Duramax (less HP but more TQ)

1989-2002 Cummins

1994-1998 Powerstroke

About the same as 1998.5-2003 Powerstroke

I don't feel like the red headed step child anymore
Howard
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post #7 of 12 Old 03-04-2008, 06:21 AM
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Hey Howard, I saw a Dyno report of one of the Turtle Expedition trucks that they had just put a new IDI 7.3 Factory Turbo in with a 4'' exhaust and the Hypermax air intake like I have and a K&N air filter with some pump tuning. It was in a Power Stroke Registry magazine I have from a few years ago. I may be a little off, but I think it was 227hp and 597lbs of torque. I believe these numbers, because my '94 can out pull my '08 6.4 and most of my 7.3 powerstrokes I have owned! It has twice the low end that any stock 6.0's I have owned had, they had more top end though. I had a '99.5 7.3 that was the pullin'st engine I have ever owned, I kick myself everyday for selling it. I had no idea what these IDI's could do if they were tuned up a little, I am super impressed! I know you have a straight pipe, but what size is it? I have a 3'' down pipe into a 3 1/2'' straight pipe, I am thinking of going to a 4'' to try and get my EGT's down. When I am loaded heavy the long grades push my EGT's right up to the 1200-1250 range and I have to back out of it. Where is your probe? Mine is behind my turbo, so I add 200 degrees to what my gauge says, at least that is what I have heard I am supposed to do, if I am wrong someone please correct me!

Fletcher
'90 F250 Supercab IDI 7.3
Banks Sidewinder Turbo
4'' straight pipe
116,000 miles

'94 F250 single cab IDI Factory Turbo 7.3
3'' banks down pipe
Banks pyrometer
3 1/2'' straight pipe
K&N Air filter
Hypermax air intake
Hydrogen Generator
Pump turned up
Timing advanced
315,000 miles!



'89 F250 4x4 supercab 7.3 IDI
4'' exhaust
pump turned way up!!!
297,000 miles
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post #8 of 12 Old 03-04-2008, 06:29 AM Thread Starter
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Originally Posted by powerstrokes only View Post
Hey Howard, I saw a Dyno report of one of the Turtle Expedition trucks that they had just put a new IDI 7.3 Factory Turbo in with a 4'' exhaust and the Hypermax air intake like I have and a K&N air filter with some pump tuning. It was in a Power Stroke Registry magazine I have from a few years ago. I may be a little off, but I think it was 227hp and 597lbs of torque. I believe these numbers, because my '94 can out pull my '08 6.4 and most of my 7.3 powerstrokes I have owned! It has twice the low end that any stock 6.0's I have owned had, they had more top end though. I had a '99.5 7.3 that was the pullin'st engine I have ever owned, I kick myself everyday for selling it. I had no idea what these IDI's could do if they were tuned up a little, I am super impressed! I know you have a straight pipe, but what size is it? I have a 3'' down pipe into a 3 1/2'' straight pipe, I am thinking of going to a 4'' to try and get my EGT's down. When I am loaded heavy the long grades push my EGT's right up to the 1200-1250 range and I have to back out of it. Where is your probe? Mine is behind my turbo, so I add 200 degrees to what my gauge says, at least that is what I have heard I am supposed to do, if I am wrong someone please correct me!
I believe your numbers too! I have a 3" downpipe (not squished) and 3" straight pipe. I don't know where the probe is located off the top of my head but my EGT gauge is off by 100 degrees. It always reads 100 degrees when cold. I still think the water/meth injection is the way to go. These guys sell stuff for our trucks including an upgraded injection pump, bigger injectors, propane, and water/meth injection. Read their site on IDI's.
Diesel Performance Specialists, Inc. - The Diesel Performance Specialists
Howard
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post #9 of 12 Old 03-05-2008, 06:52 AM
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Originally Posted by nohairracing View Post
I believe your numbers too! I have a 3" downpipe (not squished) and 3" straight pipe. I don't know where the probe is located off the top of my head but my EGT gauge is off by 100 degrees. It always reads 100 degrees when cold. I still think the water/meth injection is the way to go. These guys sell stuff for our trucks including an upgraded injection pump, bigger injectors, propane, and water/meth injection. Read their site on IDI's.
Diesel Performance Specialists, Inc. - The Diesel Performance Specialists
Howard
My gauge never drops to zero either! Is this normal? I did not know it meant that it was off. If it sits on 100 degrees when cold does that mean it shows 100 degrees hotter than the temp really is? I have been adding 200 to my readings, but mine sits at 125 when it is dead cold. I wonder if these gauges can be calibrated to be accurate? Maybe a tech can answer my questions!
That site has some cool stuff for the IDI's! I think I could use new injectors and probably a new turbo. The fins look pretty pitted on the turbo and I have a slight miss when it is idling. I guess I should expect these things with an engine that has 295,000 miles on it. Thanks for the good info.!

Fletcher
'90 F250 Supercab IDI 7.3
Banks Sidewinder Turbo
4'' straight pipe
116,000 miles

'94 F250 single cab IDI Factory Turbo 7.3
3'' banks down pipe
Banks pyrometer
3 1/2'' straight pipe
K&N Air filter
Hypermax air intake
Hydrogen Generator
Pump turned up
Timing advanced
315,000 miles!



'89 F250 4x4 supercab 7.3 IDI
4'' exhaust
pump turned way up!!!
297,000 miles
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post #10 of 12 Old 04-27-2008, 09:44 PM
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Sorry for the thread-jacking but what exactly does water/meth injection do. I'm a bit of a noob and im looking to get some performance out of my 93 factory turbo in the future after i fix the rust.
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