Search results

  1. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    She run’s pretty damn well, I rebuilt the engine around 300 miles ago. She’s got a stock bottom end, .30 bore, heads from a 71 camero, new edlebrock intake, 1103 summit cam, headers and a street fire msd distributor
  2. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Nope I’ve got a avs2 650 cfm edlebrock
  3. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    So the tach is probably just in a six cylinder setting and my rpm at 55 is about where it should be?
  4. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Awesome thank you for the information!
  5. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Sounds good I’ll post what I find
  6. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    I got 3 3/4 turns on the driveshaft with two tire revolutions. How do I find out the gear ratio based on that?
  7. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Sounds good, I’m gonna go get some gear oil and a gasket and change on that while I check the ratio
  8. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Oddly enough this tach (which I bought on Amazon) advertises it works on 4-6-8 cylinders engines however it doesn’t have any switch to change between them
  9. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    According to this the axle is a 3.73 gear stock axle, how do I go about figuring out wether someone changed the gear ratio?
  10. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    The timing light has a tach on it
  11. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    By a timing light
  12. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Okay I just drove it on a backroad, she is shifting into third gear. The tach was saying 3,400 rpm at 55 however it is up by around 220 rpm. The speedometer is pretty spot on. So given that info the rpm’s at 55 are close to 3,180.
  13. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    She’s not quite screaming but she’s definitely up there in the rpm according to my ears lol
  14. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    The tach is up by around 220 rpm according to my timing light
  15. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    It’s an aftermarket tach, I’m in McMinnville oregon
  16. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Whenever I go through town and drive by a speed check thing it looks accurate. But I will try the phone one
  17. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    I’m not 100% sure but that’s what the build sheet says and it looks stock. Last night I was driving and it did go into third gear.
  18. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Okay, I don’t believe I’m stuck in second but I very well could be if it seems that off
  19. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Thank you, when my tIres wear out I’ll buy bigger ones lol
  20. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    I’m fairly certain that it is, I can check next time I drive. My tires are about 28 inches
  21. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    Y Cool, my tires are stock size and are also brand new so I don’t want to change them out yet
  22. granthendrickson

    74 k10 going 55 mph is at 3,500 rpm

    I got a 1974 k10 with a 203 transfer case, turbo 350 and a 355 sbc. The rear gear is 3.73 and at around 55 mph cruising the rpm’s are up to 3,500. That seems a bit high to me, does anyone know what I should do to the truck to get lower rpm’s at 55? I’m also getting 8mpg.
  23. granthendrickson

    Carb to mounting plate torque specs

    What is the carb to mounting plate torque specs? I’ve been having a vacuum leak and so I tried to torque the nuts on the studs to 3 ft lbs and the studs stripped out and one broke in the mounting plate. The treads for the plate came out with the studs when I took the non broken ones out. I plan...
  24. granthendrickson

    74 k10 bed not level

    Okay I will do that, thank you.
  25. granthendrickson

    74 k10 bed not level

    Haha wouldn’t that make the bed appear more unlevel if it is indeed the cab mount?

Latest posts

Forum statistics

Threads
42,206
Posts
911,305
Members
33,701
Latest member
Rotti_rancher
Top