12v cummins

[LostBoy]

If you're going to turn up fuel delivery that much, it needs to be matched w/ a higher flow turbo to get all the power out of it & to keep EGT's down

[Big Angry]

Originally Posted by blackbike82

At my old work they turned up the IP a lot. They had a lot more power. However, this would cause the exhaust temp levels to be insane. Also they would pour out the smoke. They also turned up the turbos to put out 30-40lbs of boost. I don't know exaclty how they did this but all I know is they hauled A$$. You have to get a Pyrometer to be safe. With a trailer exhaust temps would get into the 1200+ range easy. When you get up to 1000 deg you pretty much had to let completely off the throttle to let it cool. When you stopped you also had to let them run about a minute to get the exhaust under 500. If i remember correctly they had them both dynod the 92 was 275hp and 1200 tq yes 1200. The 93 was 375hp and 576 tq.
They had the power but you couldn't use it towing. The 93 even had dual 5inch exhaust to help but it was minimal.

Wow, are you sure about those numbers? I have never seen a pick up truck that had 4 Times more torque than horsepower. It's usually about a 2:1. 4:1 is pretty much unheard of.

[litespeed]

Originally Posted by Big Angry

Wow, are you sure about those numbers? I have never seen a pick up truck that had 4 Times more torque than horsepower. It's usually about a 2:1. 4:1 is pretty much unheard of.

Not really.... The stock Cummins ISX 385 Puts out 385 HP and 1450 to 1550 lbs. of torque respectively. Depending on the configuration in the truck.

I would not believe it until I saw it a few times on the dyno. Pretty amazing... Not on the ISX but on the ISB in pick ups.

[Big Angry]

Originally Posted by litespeed

Not really.... The stock Cummins ISX 385 Puts out 385 HP and 1450 to 1550 lbs. of torque respectively. Depending on the configuration in the truck.

I would not believe it until I saw it a few times on the dyno. Pretty amazing... Not on the ISX but on the ISB in pick ups.

What pickup does the ISX come in? I guess I should have specified I was talking about pick up trucks, with engines that came stock in them. I realize that med. duty and heavy duty trucks are different beasts, but he was talking about a 92 12v, and I sorta was too.

[litespeed]

Originally Posted by Big Angry

What pickup does the ISX come in? I guess I should have specified I was talking about pick up trucks, with engines that came stock in them. I realize that med. duty and heavy duty trucks are different beasts, but he was talking about a 92 12v, and I sorta was too.

The ISX is not available in pickups. It is not uncommon to see almost 5:1 numbers out of a Cummins. I have seen it on the dyno a few times. The 12 valve is known for making gobs of power. And doing it more easily than a 24 valver (like the one I had). I should have used a better example. I apologize for that.

Here is a 1996 for sale with the dyno sheet. 248 HP and 1300 FT. LBS. of torque.

http://albuquerque.craigslist.org/car/254733583.html

[Big Angry]

Wow, I know the legend of the 12Valve, but I don't realize there was such a huge gap in the torque to Hp ratio. That is a ton of torque. Still seems like a huge gap to me, (I have difficulty accepting things some time). Thanks for the info.

[SteppinLo]

I think the Cummins 5.9 makes about two foot pounds of torque for every horsepower. Mine is close to that! The NV manuals and Dodge autos will not live with the kind of torque that is being reported in some of these posts.

[FarmTruckin]

www.turbodieselregister.com Is another good Cummins Information site...actually one of the Best Cummins Information sites being its fully devoted to Cummins...

[litespeed]

Originally Posted by FarmTruckin

www.turbodieselregister.com Is another good Cummins Information site...actually one of the Best Cummins Information sites being its fully devoted to Cummins...

Absolutely! That is an invaluable resource for Cummins owners. I have been a member there for a few years.