A.Spagnuolo

I have a 92 d350 five speed. Pump is maxed out. I put a Chinese HX35 off of eBay on it ( not very good) don't see any difference from stock turbo. Pulling a trailer 65-70 up hill egt is 1300-1400 and bost is 27. The probe for egt gauge is on the down pipe. Not sure if that's right it was like that when I got. It runs pretty good now but has so much black smoke. Is that egt ok? What size turbo should I get? I don't know if I would have the same amount of smoke with stock turbo? I turned pump up after I put hx35 on it.

u2slow

Sounds hot. I back off when I hit 1300... and my pyro is in the manifold.

I'm not having smoke problems with my setup. Maybe you have some tuning to do. What injectors are you running?

gorms

If your egt is accurate and downstream of the turbo reading 13-1400 you are waiting for melt down. I would start by checking for boost leaks. Then maybe install a boost elbow.

Black smoke is indicative of too much fuel or not enough air.

BHD

You will melt a piston for sure with that set-up, these 5.9's don't have capped pistons. You would see another 300 to 400 degrees with the probe in the manifold.

A.Spagnuolo

Ok I was wandering. How can I get it down? What is a safe number?

A.Spagnuolo

stock injectors.

oliver foster

Safe # for the turbo are 900 / 1000 or so if you have the probe in the down pipe.
I will see 1400+ for very short periods ,as in a second or two, of time on my manifold mounted pyro EGT.
Usually a blip of the throttle like that with result in over the legal speed limits when passing in a second or so as well. I would never tow at those temps..

BHD

Decease fuel or add air. Make sure you have no leaks in the turbo plumbing, what size is the hot side of the turbo? 12cm? 14 cm?, back off some of your pump mods, add snow injection.

Lots of things to do, but the easiest is to keep your foot out of it and drop a gear when towing.

A.Spagnuolo

not sure size of that turbo. It is junk. I couldn't get waste gate to work on there right so I took off and wired it shut. Maybe that's the problem? I might put stock one back on a see what that does.

mknittle

I remember when Chinese junk was a boat. Now it comes here in a boat.

gyman98

What kind of pyro do you have? Did you shorten or lengthen your pyro thermocoupler wires? That seems like higher egt's then you should be able to get with those mods

You really shouldn't have that much black smoke either after boost in built up. You must have a airflow restriction, either your Chinese turbo is junk or you have something plugged. Air filter, intercooler etc

The wired shut waste gate isn't your problem

A.Spagnuolo

I am not sure what kind it was on there when I got it. I haven't messed with it. Air filter clean. Not sure about intercooler. The smoke is mostly on low end. The factory temperature gauge never gets hot it is actually a lot lower than another first gen I had.

gyman98

Smoke on the low end isn't a big problem. If it clears up when boost is built you are ok for airflow.

The factory temp gauges are notorious for being inaccurate and isn't really indicative of your egt problem.

I just can't see how you have that high of egt's with stock injectors and just a turned up pump