Holset H1C non-wastegated turbo???

[COYOTE102076]

This is the turbo I have going on my 6.2 build.
Has anyone ever ran one of these, OR , see any reason
why it would be a BAD choice for my 6.2?

It does not have a wastegate at all, so not 100% sure how well that will work, but it is in like new condition and was free. I am installing a boost gauge and my target is 7 PSI of boost max.

Also of note, if it matters, the fuel pump was set to factory N/A spec in spite of me specifying to set it for turbo applications. So there is NOT a lot of fuel going through the pump. (Beyond factory 1982 6.2 fuel specs)

Ideas, comments, concerns appreciated!

thanks!

[More Power]

What was the Holset H1C non-wastegated turbo used on?

Jim

[sctrailrider]

It will be OK, you may need to turn the fuel screw up some, you can find that out with a boost gauge & egt .......

I know others that are using the same turbo...

[COYOTE102076]

I was told it came off of a 1992 Dodge Cummins.
I do not have a EGT gauge, but do have a boost gauge.
Did not see any reason in having an EGT gauge since I am keeping the boost under 10 psi. (Actually turning the fuel DOWN! lol )
The REASON for this whole setup is in an effort to increase MPG's and also have just a wee tiny bit more power. Say,,,165ish HP range.

This is a MPG champ truck, not a puller. My biggest trailer is a 5'x8' tilt bed lawnmower trailer! haha! So I dont have to pull any big loads. The trailer axle would snap before I run out of power even in what was it's N.A. factory settings! :-D

[COYOTE102076]

OH, and my mpg goal is 24 mpg. Has been getting 18ish

[More Power]

OH, and my mpg goal is 24 mpg. Has been getting 18ish

If this is your MPG project, there are other things you can do to improve fuel economy. An OD 700R4 automatic will give you 5-7 mpg. My 1982 6.2L diesel went from 17-18 mpg to 24 mpg after installing a 700R4 automatic. It had a 3-speed non-OD auto before.

A turbocharger may not help fuel economy (more exhaust restriction) in a purely fuel economy rig. I saw no difference in fuel economy after installing a Banks turbo system - when I could force myself to drive easy. The problem with a turbo is that I had to "use" it more often. which actually decreased mpg.

Jim

[COYOTE102076]

Thanks Jim. I have been thinking about a good rebuild-able 700R4 from a 6.2/6.5/454 for about 6 months now.
Right now I have 3.08:1 axles, TH400 (1:1 final gear) trans, and 31" tires.
By the math, I am running right on 1836 RPM @ 55 MPH.
I usually drive mostly back roads to work at 50 MPH yielding 1669 RPM.
A 700R4 ( 0.70:1 final drive ) would give me 1285 RPM @ 55 MPH
and 1168 RPM @ 50 MPH. That sounds wayyyyyy too low to me.
----scratches head----
COST is a BIG factor too.
Lets say I gained 8 MPG!! ( 26 mpg avg!) from switching to the 700R4.
I would have to drive many many miles to recoup the cost of a reliable built 700R4. Plus, the TH400 in the truck now has about 9000 miles on it since a full rebuild, and the TH400 is dang near bulletproof.

One last thought:
IF, when the time comes,,,,,I change to BFG 33x10.50x15 AT's,
It would give me 1568 RPM @ 50 MPH and that to me sounds about ideal.
:-) Too bad I just put on a brand spanking new set of 31-10.50X15 Nexen MT's ! :-/