hope some of you remember BOMBING!
This video says it all as to WHY. ~200HP ain't enough. I am sure you are loaded. Stock would have been even slower.
https://www.turbodieselregister.com...-to-change-the-oil.275212/page-2#post-2734902
First off you guys with the Cummins Diesel have it EASY!!! Lots of aftermarket support on a Heavy Duty Diesel engine. Vs. say a
Disposable GM diesel.
I am one of just a handful of people that took one of these forgotten disposable GM diesels to this level. I made a trail that others followed and still do say with the use of gapless rings. I helped break mindset many had to not use a bigger turbo on that engine. With the power modern diesels have there isn't as much need or reason for more power. I have zero desire to mod my HO 2018 RAM Cummins. I would change like a tilt driver seat and tweak a couple things, but, at the end of the day I just get in it and GO! The amount of work my BOMBED diesels took to keep on the road... Parts availability and fighting wore out patched rebuilt junk parts for a vehicles this old with ~200K miles I don't miss.
I had a nice sleeper after all paint don't make it go faster quicker. Worked hard to keep the smoke down. Lost traction on the dyno even with a scrap engine block in the bed. (Video before the stall converter.) As a reminder most GM of the 1990's era would fall flat in the upper RPM range and their auto transmissions liked to shift you there for all blow and no go. The 6.5TD had an Asthma Attack (extreme backpressure) over 2200 RPM from the small turbo they slapped on. A few mods and it could pull hard all the way past redline. Even a 454 of that era wouldn't. Sadly. The bar wasn't that high and it easily outran a stock 454 of the same 1993 year. I had to be careful hanging up on a driveway curb in reverse because if it lit the turbo off the rear end was going to light up. With a trailer I had to use 4X4 at times to backup safely.
Yes, I could have thrown more fuel at it. But that would have required a bigger IP than the small 6.2 pump I had to play with at the time.
2400RPM Yank stall converter behind a 6.2 IDI with a huge single turbo that didn't light off till 2000 RPM. Then hang on! Well the stall converter flashed it past 2000 RPM so that wasn't a long wait. Yes, you can do brakestands with a 6.2L diesel when "properly equipped" er um... BOMBED.
I also I played with a BD spool valve on a 2500 6.5TD Suburban. It didn't come in dead last during a dyno day. This one, as it had a replacement used 6.2L dropped in when the 6.5L blew up, needed a stall converter and bigger precups to clean up the smoke. My only regret is the big turbo, spool valve and converter never came together in the same ride. The sound of the spool valve was like Hell trying to escape out the exhaust.
I held off on my 2003 Cummins as long as I could and regretted waiting. I miss the howl of this turbo that would quiet down under load. The BOMBING of the Cummins was more rewarding even though I had the engine out twice.
Attention: TDR Forum Junkies 
Miss those days, still kickin' myself for selling out in 2014
Still have the work order, framed on the garage wall, from the dealer threatening to void my warranty.....
