Another PMR hp question

[cleatus12r]

Who the f__K is still tuning for torque?

Who's still trying to make big power with a 7.3 when EVERY option since 2011 makes way more reliable power (and has at least 62.75 cup holders)?

 

[superpsd]

Any experienced tuner should be able to tune for torque. It's comes down to limiting timing advancement and fueling down low to keep cylinder pressure from venting part's. There was a thread a decade ago where Swamps tuned a 7.3 to make 1000 hp on oem forged rods. They tuned it so the power didn't really start coming on until the engine was over 2000 rpm.

 

[Lt.Dan]

Any experienced tuner should be able to tune for torque. It's comes down to limiting timing advancement and fueling down low to keep cylinder pressure from venting part's. There was a thread a decade ago where Swamps tuned a 7.3 to make 1000 hp on oem forged rods. They tuned it so the power didn't really start coming on until the engine was over 2000 rpm.

I would be super interested in reading that, but I'm sure it's long gone in the sea of the internet

 

[superpsd]

I didn't find that thread but this article is interesting. A few of those trucks cracking 900hp on the dynos had stock bottom ends. Granted that's just on a dyno put some real load like a tractor pull or a few trips down the track and they would probably be on borrowed time.
https://www.pressreader.com/usa/diesel-world-4104/20180901/282591673705611

 

[Lt.Dan]

That is a cool little read, even one guy with 205/100s making almost 900hp on spray? That's crazy. Another guy making 850 with stick valve springs and pushrods is impressive

 

[superpsd]

A bunch of those guys had near stock engines. Keep Cylinder pressure in check with good tuning and backpressure low with a turbo capable of exhaling and Walla big power without breaking stuff. At least for a few pulls.

 

[Lt.Dan]

I am very curious how long those lasted. Looks like a few of them did some good pulls, went out for burnouts and 1/4 mile drags though.

I'd be happy with a 200k mile 500hp motor.

 

[superpsd]

Some are probably still running. Torque is what hurts the stock bottom ends. Tune the torque out and put the power in latter and should hold for a while. Anything can happen. Matt Maier of Irate has making big power with a stock forged rod engine. I read he bent a rod in the original engine after enough passes down the strip.

 

[mandkole]

Who's still trying to make big power with a 7.3 when EVERY option since 2011 makes way more reliable power (and has at least 62.75 cup holders)?

 

[KBMKVIII]

I wonder if Charles pmr motor is still kicking with those 250/200’s?

All joking aside, keep the cylinder pressure down low in the rpm to a minimum