My 6.2L turbo project update

Quote:

---

Originally posted by CleviteKid:
Hi Casey,

Are you trying to convert me, too? Why not drive your truck and RV down to Florida about next January, and we can put a turbo on MY truck :eek: .


( Is he kidding or what :confused: )

Dr. Lee ;)

---

I believe I have heard you say before that ALL diesels should, in fact, have a turbocharger! :D Can you imagine how that hot rod of yours would run with the added boost of a turbo? It would be unstoppable!

I'd love to come to Florida and give you a hand! I don't know if I could make it all the way down to Miami or not. So how 'bout we meet in the panhandle somewhere, like Destin or Panama City? ;)

Casey

6-25-04 Update:

The truck has been running great all week. Yesterday I was on the interstate running about 75 mph, in overdrive, with about 3 psi of boost on the flats, and about 6 psi going up hills. EGT's were 700 to 850.

Up one hill I kicked it down into third and mashed the pedal to the floor. I saw the needle on the boost guage get up to 13 psi, and EGT's were hovering at 975! Very cool. However, I ended up burning a hole in one of the rubber hoses on the pressure side. I lost most of my boost then.

I now realize that I shouldn't have used a 90 degree rubber elbow in the pressure system...it can't take that kind of heat and pressure. So my goal today is to redo the pressure pipes and couplings, and get rid of the weak spots.

Casey

Proud owner of a "STEENKIN' turbo!" ;)

Sounds like you've got a winner. Isn't it fun to run the engine in its NA form for a while, appreciate that level of performance, and finally give it the turbo power it deserves? http://www.oliverdiesel.com/forums/i...con_rockon.gif

As for boost couplings, I found ATP Turbo has a good selection of couplings that are rated for high boost applications. Their prices are competitive, and you get to choose the color of the couplers. :D

Great job Casey! Looking good...
And more important, sweet results!

Daan

6-29-04 Update:

I replaced the plastic pressure pipe that goes from the turbo to the manifold with a steel pipe. I think I've got all the bugs worked out now! I've added new pics of the pressure system, and here's one of 'em:

http://community.webshots.com/photo/...57778872FIqafD

All the pics showing my progress can be seen here:

http://community.webshots.com/album/153303040IeQyIu

13 psi still seems to be my top boost, which is fine by me. Anything over that would scare me...I'm not sure how much boost my 6.2L can take!

In order to reach that much boost, I'm running at full throttle at near governed engine rpm. Most of the time the boost runs around 10-11 psi under near full throttle.

The highest EGT I've managed to hit is 975 degrees. It will actually go higher than that in overdrive when boost is low, but not when under full throttle. That means I've got more playing to do with the injection pump.

I find it extremely interesting at how the turbo affects EGT's. Before the turbo, I turned up the pump 1/4 turn and was hitting 1300 to 1400 degrees all the time. After the turbo, and with no adjustments to the injection pump, I see 900 tp 975 as max. temps, with cruising temps around 500 to 700.

When cruising in overdrive, the boost is low and the EGT's are higher. Push the throttle down and give it a little more fuel, and the truck jumps into third, the rpms and boost climbs up, and the EGT's actually drop! That just goes to show how much difference a turbo alone can make in EGTs.

Also, although I can't see the tailpipe that well in my mirror, I don't think I'm smoking hardly at all now, whereas before I could leave a smoke screen. I'm burning all my fuel now. Just another indication to the need of IP tweaking!

Casey

Turn up the screw a little more, Casey, and you'll be seein' TIRE SMOKE in your mirrors ! ! !


The Clevite Kid :cool: