I'm looking to buy a used diesel truck, but was wondering if there are any pros/cons to either engine. I'm not looking to hot rod the thing, and I'll never have more than 10K lbs. on the back of it. Is there a huge difference in fuel economy between the two? What are some things to look for with both? Is there anything that at XXX thousand miles goes out? Any help is appreciated.
Well there were 2 different 7.3L turbo engines, the IDI and the PowerStroke. As well as the Naturally Aspirated 7.3IDI.
For pure power, the PowerStroke wins. Downside is it is computerized and parts are expensive. This engine overlapped IDI production and started in 1994. 1994 PowerStrokes were limited to manual transmissions only. (1994 was PSD's first year and IDI's last year).
Middle of the road for power is the IDI turbo. Only available from the factory for a couple years, although many older IDI's were retrofitted with turbos. This engine is often mistakedly called a "PowerStroke".
Dirt slow is the NA IDI. Hey, I tow with one every day and it gets the job done. I ran loaded at about 20K# over the appalacians in a IDI NA van with no problems. But you won't win any drag races.
Driven the same way, each engines will get around the same mileage. Towing heavy either turbo engine will get better mileage than an NA.
1997 Ford F350 SRW 7.3L PSD
1985 Ford Ranger 2.3L 5 speed
1966 Mustang 200 I6, auto, 4 wheel disk, power brake retrofit, Corvette master.
Former vehicles, 1994 E350 7.3L IDI, 1985 International 1654 rollback, 6.9L IDI, (2) 1994 Ford E350 7.3L IDI, 1985 Ford F350 DRW 6.9L IDI, 1985 Ford F350 wrecker 6.9L IDI.
*dual ASE Master Certified, Automotive, Medium & Heavy trucks*
Owner / operator, Patriot Automotive, N Ridgeville OH
I get 14mpg towing (in OD), 18-19mpg empty with 3.55 gears, 7.3 IDI Turbo. The non-intercooled stock turbo on the IDI is not exactly "optimized" for high power (read: low boost), but it does sound pretty good whistling down the road!
94 F250 7.3 IDI Turbo all stock - needs some upgrades
2003 Jayco 294J
1983 Mustang 302 - 12.42 @ 109mph