Homemade Turbomaster!!!!
 

Last night, I made a turbomaster with a few simple parts and a simple design. I thought I would post the pictures and a short description as to what I did and why. Here goes......


Since I have a junk GM-4 turbo, I cut the actuator rod off of the spring pot and threaded it to 12-24 most of the way down the shaft.
I cut the vacuum pot of of the GM-8 wastegate actuator bracket and ground it smooth. I acquired (2) - 12-24 jam nuts and a #12 lock washer, a spring of unknown spring load with a 7/16 outer diameter, four washers: (2) - 7/16 flat washers, (1) - #12 fender washer (thick), and (1) - 3/8 fender washer (thick).
Attachment 37220

I welded the 3/8 fender washer to the top of the bracket and then welded one of the 7/16 flat washers on top of that, centering it over the 3/8" hole. Then I welded the other 7/16 washer to the #12 fender washer. The idea of the 7/16 washers is to hold the spring center.
Attachment 37221


Now with all of this done and a few coats of gray primer, everything is ready for assembly, and then installed on the turbo. After installation, I will cut down the length of the rod just a little longer then the spring and jam nuts, with no load.
Attachment 37222

I will install this on my turbo in the morning, and I'll take another picture of such. Hope you guys like it!!!

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I installed my homemade turbomaster this morning (yesterday). Looks and works great. I wanted to start out with low boost (2-3 pounds), for a break in period. I had it set at three pounds within a few minutes.

Attachment 37223



In a couple of weeks I'm gonna change the oil and raise the boost to about 6 pounds.

Nice job there Chris :tu:

:tu: Yea that is good idea ! think i will do away with my vac pump , Does any one have part number for the belt i will need after remove my vac pump ? I have 95 gmc 3500 w\air

thanks!

nice! i hope your running a boost gauge tho.

btw as far as the belt thing, all i did was took the bottom part of my vaccum pump off, so it ran as an idler and i didnt spend all day looking for a belt that would fit

its not an actual "boost" gauge, bought as such. Its a pneumatic gauge that registers (IIRC) 15 lbs vacuum - atmosphere (0) - 30 lbs pressure. I assume it will work the same. gauge comes up to 3-4 lbs under heavy load.

I have mine set to 11lbs to the boards.