This is just a silly question but who much horsepower/torque would a diesel truck like ours make without a turbo? A co-worker always says diesels make "no power" without a turbo. Obviously not true but just something I have wondered.

 

I think that you could probably knock off about 50hp for our turbos. Rough estimate, but I think with everything else being the same, I think about 50hp less without the turbos would be a good estimate. I have nothing solid to back that up with, still a guess.

 

Based upon your signature it sounds like an educated guess... better than mine at least. Maybe someone else out there knows...

 

I am sure someone out there right now is taking their turbo off, getting the dyno prepped and will have the results...

 

It would suck, my estimate half the HP and 60% the Tq.

 

+1 it would be way more than 50hp you have to think about how much air that turbo is putting into the cylinders without all that air you can't put anywhere close to as much fuel as it does now.

anyone know what the ol' 7.3 IDI n/a put out?

there's plenty of non turbo diesels out there but they are BIG motors like the 7.3. The advantage turbo's have is that you can use much smaller motor's

edit

7.3 L V8 1988-91 180 hp (135 kW) 365 lb-ft (495 N·m) Diesel
7.3 L V8 1988-91 180 hp (135 kW) 425 lb-ft (575 N·m) Turbodiesel

idk toss-up I guess

 

Your also talking about indirect injected diesels versus direct injection. I don't know for sure, but I wouldn't compare two different injection types unless I knew for sure that it wouldn't affect the outcome of comparing IDIs to modern diesels. Really the only way that would be able to truly get a fair shake as to how much horses you'll lose(and torque) is if someone was to take a 6.0 and take the turbo off and reprogram the computer and do it that way.

 

N/A diesels are quite putsy

 

Yea I know. I wasn't really trying to compare them just was curious. I thought it would be a bigger difference.

 

Blew the elbow off the turbo on my 04 6.0 this summer while pulling my 11,000 lb 5th wheel on the interstate this summer thought the truck blew up. After stoping and checking everything out with the engine shut down could not find anything so started it up and tried to pull away took about 25 ft. to figure out something major was wrong check boost gauge no boost no power I think it would be about 1/2 of normal pulling power.

 

I would think a modern, non turbo diesel would be in the mid 200s for HP and 400s for TQ. It would probably be really sluggish though. Without that turbo, the low PRMs would really limit it.

It would probably get decent MPGs though.

Mike

 

the 7.3 IDI was 180 horse and the first turbo powerstroke was @ 210.

 

A friend of mine has a new 94 6.9 bought with no turbo...Absolute dog. The 95's had one. He went to Banks but it only has 9 psi of boost. Is adequate but nothing like a 7.3 od 6.0.........Good Luck

 

Designs w/out the Turbo compared to designs w/one can't be made. Take the turbo off of a 6.0 and you've a boat anchor.

 

That was already mentioned before, topic just got sidetracked. I don't believe boat anchor would be exactly the truth. While there is no doubt that a turbo does help with hp and tq, I think people have greatly over exaggerated it's benefit. I have had exhaust leaks(more pronounced with a non-vgt turbo like I have) and the turbo for all practical purposes was out of the loop power wise. Had to watch the EGTs as they would spike really really quickly, but it was still able to haul quite easily. Worse thing was that it smoked something awful due to the bigger injectors(which could skew my results from someone with all stock, but still my injectors were matched with the turbo that I had).