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mackdump600@yahoo.com

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Everything posted by mackdump600@yahoo.com

  1. mackdump600@yahoo.com
    Thanks for letting us know
  2. mackdump600@yahoo.com
    Anybody have any current update on the firetruck that was in somewhere in Oregon with the thousand some cubic inch hall Scott engine
  3. mackdump600@yahoo.com
    Calvin little. Hummelstown , Harrisburg pa 717-566-8973
  4. mackdump600@yahoo.com
    Does anybody have any info on a the 1958 b405 fire pumpers with the 354 Chrysler hemi engine, how many was made, how many is left, anything else?
  5. mackdump600@yahoo.com
    Hi there’s a fella in Harrisburg it is FEASER machine shop number 717 236-9387 he rebuilt a 1970 707 gasoline engine for me did a fantastic job on it give them a call
  6. mackdump600@yahoo.com
    Hi I have a 70 R608 with the 707C engine and it melted the pistons on me twice ,do yourself a favor and weld in a bung at the exhaust pipe ,couple inches from where the steel pipe connects to the manifold and monitor your pyrometer and see how hot your running ,mine at 1800 RPM would go up to 1300° pretty quick and melted the Pistons ,still haven’t found the exact reason why ,water temperature does not go up ,just exhaust temperature pretty expensive to replace the pistons in that girl ,good luck
  7. mackdump600@yahoo.com
    Did you find one yet
  8. mackdump600@yahoo.com
    Thanks buddy
  9. mackdump600@yahoo.com
    Hi Calvin Little in Harrisburg pa 7175668973 Or John Chalmers chambersburg pa 7173348709 might have some what size engine do you have and where are you at? I have a B 58 405 with the 354 Chrysler hemi
  10. mackdump600@yahoo.com
    Thanks Barry
  11. mackdump600@yahoo.com
    I registered I think a B model how do I check and see if it’s in the book or look at the registry for how many is in there
  12. mackdump600@yahoo.com

    Hi can you give me more information on timing the 707 c    engine ,is it on the fly wheel or where  under the truck

    1. Keith S

      Keith S

      https://t.me/pump_upp
    2. Keith S

      Keith S

      https://t.me/pump_upp
  13. mackdump600@yahoo.com
    Thanks I’ve been looking for and I miss her too and I enjoyed her reports on the truck
  14. mackdump600@yahoo.com
    Hello from Smithfield Pennsylvania
  15. mackdump600@yahoo.com
    Does anybody know what happened to skippy Mack
  16. mackdump600@yahoo.com
    Thank you for trying to help me I will double check everything again water temperature does not go up ,its exhaust temperature with the pyrometer goes up extremely fast when it starts to lug down, went up a heat range hotter on the spark plugs haven’t been running it much yet to see if that helps I appreciate the thought have a good day my friend will post when I find a problem
  17. mackdump600@yahoo.com
    Hi are you still looking for overdrive magazines
  18. mackdump600@yahoo.com
    Hi not so far, I also have a 49 Chevy 4400 series 235 six cylinder and it takes exactly the same rotor cap and button as my Mack ,also the per Tronics was the same as I put in my Chevy . everything else is just Standard turn signal relays. I changed it over to negative ground from positive and only had to reverse the wires on the temperature gauge and it still works today , went to a one wire alternator and did away with everything else on the old charging system in 04 and haven’t had a problem with electrical at all .
  19. mackdump600@yahoo.com
    Hi I thank everybody for the answers .the timing is part of the problem the first time the engine blew I did Have the timing advance too much the book and I have the original book calls for 2° and that’s what it set for with regular fuel I have a pyrometer on it now to keep an eye on the internal temperature of it but it’s still getting too hot I’ve triple check the Intake for vacuum leaks nothing there in process of drilling out the jets on the carburetor but it’s slow going and with winter I don’t get a chance to run it that much thanks everybody for all the suggestions will keep you informed merry Christmas
  20. mackdump600@yahoo.com
    Thanks
  21. mackdump600@yahoo.com
    I’m using regular 88 fuel with the 10% ethanol in it it’s about all I can find around here the water temperature doesn’t go up it’s exhaust temperature melts the pistons
  22. mackdump600@yahoo.com
    Hi this was a 70 R608 firetruck pumper 707C gas engine I took the bed off and built a 55 style Chevy bed with a air rod mark rear under it The drop down MACK tailgate are 2“ x 2“ by quarter inch square tubing
  23. mackdump600@yahoo.com
    Yes I believe you are right on both of them call for 3 to 4 pound pressure on the fuel put a pyrometer on it a few inches past the exhaust manifold and watch your temperature it will go to 1500 degrees real quick
  24. mackdump600@yahoo.com
    Hello I have a 7707 c that exhaust temperature melts the Pistons rebuilt the motor 40 over new pistons rings and it’s still running hot put a pyrometer on it ,tried drilling out the jets in the carburetor it’s still running way too hot ,unless I pull the choke out better than halfway to keep it temperature down any advice is this common with them or should I put a four barrel Holly or anything else on it. It is the original carburetor yet
  25. mackdump600@yahoo.com
    A man in Harrisburg PA by the name of Calvin Little has about 15 707 Engines not sure whether he has any A’s but he does have B’s and C’s and his number is 717-566-8973 hope he can help you he has helped me on my 70 Mack firetruck

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