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  1. 71 Highboy

    What is this turbo setup

    It IS a rotomaster turbo set up from Turbo Engineering in Tacoma. I used one like it for years, then made another with a different flange for a modified Holset H1C. Good reliable products. The original pressure bonnet is turned 90* on mine cuz I used it for the air from the intercooler outlet as...
  2. 71 Highboy

    1978 f250 gas to diesel conversion.

    I did this by using the stock motor mount towers from the 71, and cutting the tops off at the matching angle to the motor mounts bolted to the IDI block. I made a flat plate to match both holes on the mount, and welded the new top on the tower. The passenger side tower needs to be removable...
  3. 71 Highboy

    Transmission change

    Thats alotta questions! I can speak to some of them from truck chassis experience nut not a van chassis. Years ago, the C6 was all that was available, and as Franklin mentioned, a good tranny shop can install those E4OD parts in your C6 with a new converter to match your engine torque...
  4. 71 Highboy

    Catch can

    Correct. I remember considering one of those. But I have such good results with Lucas stabilizer over the years, I could not justify the cost. This system just prevents coking at the bearing as it caries heat away after shut down, just gravity fed. Same theory, no pump or power.
  5. 71 Highboy

    Catch can

    pretty easy to build from a piece of pipe. you can see it on the firewall here. one #6 braided in on the end, and another out to the turbo.
  6. 71 Highboy

    Catch can

    It was a complete kit when 6.9's first came out. The only one I've ever seen with a gravity oil reservoir to the turbo for cooling the bearings after shutdown.
  7. 71 Highboy

    COOLANT/CAVITATION/RELATED QUESTIONS

    Tenacity! I was only trying to point to the cavitation issue at the top. Long story is after 29 yrs the old 6.9 was acting like head gaskets failed. Replaced them while the 7.3 went in and out a few time to fix various leaks. I did not deck the block, so the gaskets failed cuz of erosion at the...
  8. 71 Highboy

    COOLANT/CAVITATION/RELATED QUESTIONS

    2 engines in and out 5 times each. Should not have counted, but I got good at by myself. I thought this was the last time for the original 6.9 to go back in after the machining on the block, but I was WRONG!! It came out once more and the machine shop owned it, and disassembled and sleeved it on...
  9. 71 Highboy

    Lost Power- where to start

    good info Bradd! I would have pulled it out as soon as the chunks fell out, instead of running it more. He's got bad symptoms going on. Regarding the 4th gear problem with a C6, I fixed that with a GV unit. In front of a remote 205. Just don't use it for slowing down, and always shift up or down...
  10. 71 Highboy

    COOLANT/CAVITATION/RELATED QUESTIONS

    #3 and #4 are both correct. It doesn't matter as long as you add the SCA which is readily available. My water filter from NAPA has it in it, adds as it passes thru and I add manually after testing with strips between filters. You won't always see it as steam in the exhaust if the pinhole is...
  11. 71 Highboy

    aluminum vs. copper radiators

    Macs has been the go to place for years. The radiator I installed in my 71 30 years ago was a donor from a 1976 camper special with a 460 and C6. 3", 4 row core with brass tanks. They repaired and serviced it 6 years ago for 200$. When I designed the intercooler, I made a wood frame to hold...
  12. 71 Highboy

    Buying 85 IDI ATS turbo motorhome!

    It could be a sticky spool in the valve body. A good quality kit will allow manual shifting up or down at any REASONABLE speed, i.e. matching gear to road speed. I manually shift regularly, up and down, using second gear for downgrades, and even on a 5% grade will have to feed light throttle...
  13. 71 Highboy

    Catch can

    I have not had a CDR for 30 years. a 3/4 hose connects the port in the valley to the intake at the compressor side. Total seal rings a couple years ago improved even more. No catch can, and very minimum blow by. You can see the hose here. It's about 3 1/2 feet long from the valley to the intake.
  14. 71 Highboy

    Inline filters.

    I have a sediment bowl from NAPA mounted right under the cab where my 3 way fuel selector valve is located. It has a screen on the output side, and a clear bowl so you can visually check for debris, with a shutoff on the inlet side for easy cleaning. This is the first stop for crap, and...
  15. 71 Highboy

    parallel turbos

    This 1971 truck had all the sport custom trim on it when I bought it in 1974. It was a little beat up from the woods so I took it all off.
  16. 71 Highboy

    parallel turbos

    One of these would be good for the low side in his two spool system. I would plumb both banks exhaust to a dual plane collector, with both big and small turbos being driven from both banks. A lot of heat will be generated, and a lot of room will be needed.
  17. 71 Highboy

    parallel turbos

    My Holset drains thru a fitting like that into the pan on the 6.9. When I was changing to the 7.3, I used a galley plug in the head. I can't find a photo of it, but there is one on each end of each head that joins the drain hole from the rockers to the basement. Better than drilling the...
  18. 71 Highboy

    One pump to rule them all

    check factory gm 's with serpentine accessory drive at salvage yards. cut the center out and weld in your chosen hub/shaft size with correct offset for alignment...
  19. 71 Highboy

    One pump to rule them all

    If you can weld cast iron, it's easy to duplicate with a jig. Two may be overkill unless you are pulling a sled!!!
  20. 71 Highboy

    One pump to rule them all

    I have used saginaw pumps and this bracket for 30 years. no whine .no problems. easy access and readily available.
  21. 71 Highboy

    Turbo decisions

    Oregon Cam Grinding has a bump stick for these engines that is an improvement over stock grind to work with a turbo. usually in stock for a buck or so. Really happy with it for the last couple years...
  22. 71 Highboy

    C6 Finally Died

    I understand your point, and have driven many of them with sticks. It is practically impossible to make a smooth shift with Ford manuals and hyd. clutch system. Made me spill too many beers, and I was done shifting. I was comparing the performance of the new converter against the one that had...
  23. 71 Highboy

    Allison 6 speed transmision?

    I have used a GV unit between a C6 and a remote NP205 for 19 yrs. The company reps have changed, but the do and don'ts have not. They operate on a little over a quart of fluid, so use good synthetic, like Lucas, and change every year or 10,000 miles. Don't use it engaged for compression braking...
  24. 71 Highboy

    C6 Finally Died

    If it lasted 150,000, with the right parts and shop, it can easily do that again. I had mine gone thru about 2 yrs ago, and the new converter has a stall speed of 1800 rpm so it works well for the power band of the engines. It is imperative the trans pressure, and TPS for the shift valve are...
  25. 71 Highboy

    Water separator cleanout and test

    dirt cheap. normally about 27$ each...

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