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Author Topic: my friends turbo project  (Read 350 times)

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Offline m in sc

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my friends turbo project
« on: October 20, 2017, 12:43:28 PM »
what to do with a ujm thats was hacked beyond salvation by 3 previous owners? hack a hell of a lot more.

David did all the fab work, i did tuning, electrical (including building an ignition), will do porting of head and general instigation and bad idea supplier.  only thing actually purchased for this was the turbo, and oil lines. (had them made). rest was stuff i literally had laying around. exhaust is almost exclusively made from damaged rd headpipes, tail pipe is a dinged headpipe from an s2. exhaust runners are within 1/4" length of each other. intake is a hand made sheet metal unit, and this will eventually get a tb and fi.  this will be torn down really soon for final cleanup and a motor refresh.  last good run was 75mph in 3rd. no idea about top speed yet. needs some internal help. wastegate set to 7-8psi.

77 xs400. 't-type'



 
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Offline SoCal250

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Re: my friends turbo project
« Reply #1 on: October 20, 2017, 07:06:20 PM »
Cool  :cheers:
91 TZR250R (3XV);  89 FZR400W
79 RD400F Daytona;  77 RD400D - mod project
75 RD250B (350 project);  75 RD200B (in boxes)
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Offline MarkT

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Re: my friends turbo project
« Reply #2 on: October 20, 2017, 08:19:53 PM »
Love it!  Sure wouldn't use the word "hack" in regards to the turbo install.

 :thumbsup:
1963 Yamaha YG1-T, 1965 Yamaha MG1-T,  1966 Sears Allstate 250, 1970 Yamaha CT1, 1972 Yamaha R5 - 400 project bike, 1981 Yamaha DT175, 1988 Yamaha DT50, 1990 Yamaha Super-DT50

Offline m in sc

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Re: my friends turbo project
« Reply #3 on: January 07, 2018, 10:57:04 PM »
bikes torn down for final assembly. pretty sure hes going to redo the whole exhaust in stainless. the manifold adapter from the log to the turbo housing needed to be reworked a bit, and then machined flat in the intake side due to eh we deformation of the material due to welding. use a bigger flat surface, added 2 bolts for rigidity (AS IT liked to move around a bit.) added port for the blowoff as well. frame is at powdercoaters this week, should be ready for final assembly soon. after the valve guides ship, im going to port the head, get the new guides in and then its go time. 
 after teh welding, we took it over to my office, and put it on the Bridgeport. deepest cut to flatten plate was a difference of almost .040", pretty wavy due to the heat. also then ground it flat there to mate the surfaces.











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Offline dan vbv

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Re: my friends turbo project
« Reply #4 on: January 10, 2018, 03:23:33 AM »
very nice   
If it has not blow up your not trying or it is to rich