How To Lower Egt 5.9 Cummins

I think rburks answered all your questions

Just y'all running 1500RPM is the main issue.. You lot should never lug it like that with a trailer, downshift information technology. Just problem at that place is you would exist in 2nd gear which I don't recollect locks the torque converter, so your trans would estrus upwards, but it would have been at 2200RPM which would have been a lot better. Problem is that lugging information technology with a trailer like that and going upwardly a hill volition pretty much ship any truck over the border on EGT's, there simply isn't enough engine RPM to become rid of the heat and the momentum of the engine is so low that any fuel you give it really doesn't practice annihilation but add to the heat. You accept to get the RPM upwardly and so information technology has some momentum and horsepower so the engine will sing. The 12cm will help only if you see on the chart I fabricated, I am in the same boat every bit you at 1500RPM. And then basically, you lot merely need to proceed information technology higher upward in the RPM's.

I agree with ISX that keeping the RPM's upwardly when pulling, especialy pulling a Loma, is a must in order to control EGT'south...having said that...1500RPM isn"t Lugging as much as yous would think w/the HY35 Turbo..that matter spools at 1100-1200 westward/the boost fooled..I mean its strong at 1500RPM but it curves over past the time you get to 2000rpm or merely before...towing w/ any mods. at all requires y'all to spotter the PYRO and down shift accordingly..annd.. dorsum your human foot of the go pedal...:smart:"Yous Will NEVER BE ABLE TO Utilize EVEN One-half THE ADDED HP. FROM THAT BOX WITHOUT MELTING HER DOWN UNLESS You UPGRADE THAT TURBO & EXHAUST...I mean you tin can run that box wide open on the highest setting..but especially when towing your going to accept to back out of the throttle and keep the turbo spooled tight{2000rpm+} "cant go on your human foot in information technology very long"

The problem is a 2-stage issue with the frazzle turbine wheel & housing... 1#information technology isn"t big plenty to pull the frazzle gasses out of the engine fast plenty #2 the exhaust turbine cycle is so small that it can't turn the compressor wheel fast enough to make the desired air needed....

hope this helps you out:thumbup2:

Richie

--- Update to the previous mail service...

Ok.. I tin can run into where you lot get your conclusion.. Basically egt go through the roof at highway speeds to.. Im runnnin 800 degrees on light throttle going 70mph. thats on power level 2 also and then thats only 30hp extra. Tin can i swap out the hy35 with the hx35? like the whole thing housing and turbo. ? I found some good deal on a used 1 with a bad waste product gate actavator.

YES.. You can swap to an HX35 complete turbo but you will have to change your down pipe...your HY35 has a 3.5" adaptor flange elbo that bolts up to the back of turbo exhaust housing & connects to the iii.5"downward pipe via a ball seat blazon deal simular to whats on a V8 GM gas motor. The HX35 uses a V-Band clamp to connect and seal to the turbo exhaust housing.. the flange on the turbo exhaust housing is 3.5"dia.

I HAVE A NEW Stainless Steel 4"to 3.five" downpipe for HX35 or any turbo westward/3.5" flange for V-BAND connection ..this is to be used with a four" exhaust system:whistle:

Richie

Source: https://mopar1973man.com/topic/2025-how-to-get-lower-egts/

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