D7E turbo question

I have heard this is the place to find a turbocharger for most anything. MJM in Tuscaloosa, Alabama (800) 331-0616 | (205) 339-0616

Would be worth a call.

I agree with you if the turbo is strictly for the high horse, but I seem to remember that this turbo change occurred several hundred units before the hp change occurred, which would indicate that the rack change and governor changes were responsible for the increase.

This also begs the question, can I make this a high horse D7E by having the IP rack and shims recalibrated, with no ill effects? I do know for sure that the rod bearings on my crank are 2.5" in length and the high horse crank takes a 2" rod bearing. My first impression is that a 20 hp increase is so trivial that the prior crank/bearing setup would still hold up, but that is just a guess. Also there was a change in the air filter I believe.

Thanks for the tip on the turbo shop. More comments and thoughts would sure be welcome as I have some choices to make on the rebuild.

Charles

I dismantled a d7-47a machine and am still have the turbo if I can help

Yes i may well be interested. Please, if you can, give me serial number of dismantled 47a and part number of turbo. Also condition and price if you please.
Thank you sir.

Charles

The 8M2679 turbo produces 32 +/-3 in. Hg boost @ full load and speed.
The early 4S9706 turbo (160 hp) produces 25 +/- 3 in. Hg.
The same 4S9706 is used for the 180 hp at both 30 +/- 3 in. Hg. and 32 +/- 3 in.Hg.

Full load 1200 rpm stays the same with some variation in high idle speed.
Static rack settings and torque spring and spacers need to match the application.

The high hp versions run a 100 rpm higher low idle speed.

So if they are the same how does one deliver more air? This post stumped me old magnet!

Does the increased fuel delivery spin it up faster or??

For that matter from your figures it appears the older 8m2679 delivered comparable airflow to the high horse turbo. Thanks a lot for your wisdom and help, all of you.

Charles