Question about 5.9 Cummins boost?

Question

on a 5.9 cummins stock transmission and stock transfer case what is a safe boost limit to do a boost off without breaking anything

Answer 1

well, thats probably something youre going to have to figure out the expensive way.........

Answer 2

You're wanting to know how much boost you can build before a launch correct?

With a stock automatic I wouldn't go over 10psi. If you had a modified auto with billet shafts and better torque converter you could go up to 20~30psi.

At any rate you can go ahead and try higher if you'd like to find a way to get billet shafts, etc sooner.

Heres pictures of a sheared flexplate from doing boosted launches.

http://www.dieseltruckresource.com/dev/s...

Even if you do have all billet internals, if you have enough power you'll break them too!

http://www.dieseltruckresource.com/dev/s...

Come over to the Diesel Truck Resource and register so you can use the forums. They're free and are filled with lots of very knowledgeable folks who are willing to help. You'll learn a lot about your truck and how you can best modify/race/pull with it.

http://www.dieseltruckresource.com/dev/i...

Answer 3

What yr??? I'm running a 04.5 $X$ auto SWB Ram Air>Quadzilla 100hp mod>4" exhaust stock cat ran away>40 lbs boost is what it will run> need to check the inter-cooler if plastic it will split need the aluminum 1> I don't run it hard wanted MPG 20 Hwy> 315x70x17 tires>Over 100 hp the trans will have issues>47r trans won't hold up> 48r will to100 hp over that $$$ So beef it up> Go to dodge forums they have lots of do & don't>