Project Family Burb. 1972 C10 suburban build

[Dieselwrencher]

Originally Posted by CG

I know zero about diesel engines so Im curious, why do most of the diesels I see run such large exhaust diameters?

I know on your basic small block Chevy the really large diesel size exhaust pipe diameters is detrimental.

Not wanting to hijack your thread, but who better to ask something Ive always wondered =)

Not hijacking at all. Diesels have a higher compression ratio plus most have a turbocharger, which also adds heat. Both combined lead to very high exhaust gas temperatures and they need the larger exhaust to help expel the heat. 5" and 6" on most light duty pick ups is over kill. I have seen 5" exhaust on light duty trucks that tow heavy run cooler coolant temps at weight than with 54" so I can't say that it isn't necessary. It just depends on hat's all done to the truck.

Most medium duty trucks that have similar engines to the light duty diesel pick ups do have 3" or 3.5" exhaust down pipes and then step up to 4" or 5" at the muffler and tail pipe. You typically see 900* on an exhaust gas temp gauge pre turbo on a grade hauling. General rule is to not go over 1250* for more than 15 seconds. Bad things tend to happen and you will have costly repairs soon.

[Dieselwrencher]

Well, would ya just look at that. Another stalled out project. Let's update this one a bit. Haha

This year has been full of a lot of surprises which have taken my time away from this project. We were hoping to get it done this year but it will be pushed back to spring. Parts shortages along with money shortages don't help.

Since this is Momma's rig, we couldn't leave it stock. It is getting a second spinning muffler. I also wanted to use the Dodge intercooler and radiator in this one. I chopped up the rusty 67/68 radiator support and grafted in the 2nd gen dodge one. I wanted the extra cooling capacity and it makes it a lot easier if you can go to any parts store and gets parts if we ever need to especially on a road trip.

[Dieselwrencher]

The green hood is just a mock up hood. I have since gotten a nicer one from Leon. I'm sure glad he has a lot of parts for these trucks. It's going to be a bad deal when he's out of them.

The radiator hoses went right on without any mods. The Cold side intercooler pipe worked as well. I'll have to modify the hot side since the addition of the second muffler. I have ordered a reman steering box with the flare/o ring type fittings so I can run the dodge pressure hose. One more part that usually would need modified.

I need to figure out the hydra boost next. I also have to decide if I want a shift cable for the transmission or a linkage. I have a tilt column I need to get put in this so I can work on that.

My son Colt was helping clean the interior out. Someday it will be chop cut rebuild time for the body.

[LockDoc]

-
Well at least you are headed in the right direction.... .. Lookin' good! Burn outs on the way to the grocery store! BWHAAAA

Tell Colt I said he is doing an awesome job.

LockDoc