Likes Likes:  12
Page 1 of 2 12 LastLast
Results 1 to 10 of 16

Thread: Cruising RPMs

  1. #1
    100+ Posts sonny8l3's Avatar
    User ID
    17834
    Join Date
    Oct 2014
    Location
    Livingston (Colyell ), Louisiana, USA
    Posts
    110

    Default Cruising RPMs

    Hello, I put a Trail Tech tach on my '71 1600. I'm wondering what is a safe RPM range for running on the Interstate. I don't get on it often, but when I do I don't pass much that's not on the shoulder. My mechanic said to just listen to the motor, but I don't hear well enough anymore for that. What RPMs do others run at cruising speed? Thanks for your time.

  2. #2
    40000+ Posts
    Gold Club Member
    rhino 2's Avatar
    User ID
    6298
    Join Date
    Oct 2011
    Location
    Mendham NJ USA
    Posts
    40,366

    Default

    Just before the valves start floating..........You'll know it when it happens...
    Sometimes a Cigar is Just a Cigar.....
    2018...SLINGSHOT...........

  3. #3
    400+ Posts
    Gold Club Member
    Sidecarbill's Avatar
    User ID
    18278
    Join Date
    Feb 2015
    Location
    Sussex nj usa
    Posts
    597

    Default

    Quote Originally Posted by sonny8l3 View Post
    Hello, I put a Trail Tech tach on my '71 1600. I'm wondering what is a safe RPM range for running on the Interstate. I don't get on it often, but when I do I don't pass much that's not on the shoulder. My mechanic said to just listen to the motor, but I don't hear well enough anymore for that. What RPMs do others run at cruising speed? Thanks for your time.
    Mines a stock 1500 single port. I run it flat out on the interstate and hope I don't get run over by a semi. I don't need no cruise control flat out, and I don't have worry about exceeding the speed limit. Its been to California Texas and Canada. At different times in its life. Its a lawnmower engine can it really run too fast?

  4. #4
    40000+ Posts
    Gold Club Member
    rhino 2's Avatar
    User ID
    6298
    Join Date
    Oct 2011
    Location
    Mendham NJ USA
    Posts
    40,366

    Default

    Quote Originally Posted by Sidecarbill View Post
    Mines a stock 1500 single port. I run it flat out on the interstate and hope I don't get run over by a semi. I don't need no cruise control flat out, and I don't have worry about exceeding the speed limit. Its been to California Texas and Canada. At different times in its life. Its a lawnmower engine can it really run too fast?
    Yep......I would run my Beatles 71 and later 73.....From the Lincoln tunnel up the missing mile down Rt 80 To Rt 287.....Flat out and i found that gravity was the Rev Limiter....

    Sometimes a Cigar is Just a Cigar.....
    2018...SLINGSHOT...........

  5. #5
    Old Redneck Motorhead
    VW Tech Contributor
    TrikeTalk Moderator
    DeathBySnuSnu's Avatar
    User ID
    7688
    Join Date
    Mar 2012
    Location
    Vicksburg MS USA
    Posts
    1,391
    FT Author
    2 Threads

    Default

    A speed to rpm chart.

    947959.jpg

    And a page from the owners manual.

    page67.jpg

  6. #6
    Old Redneck Motorhead
    VW Tech Contributor
    TrikeTalk Moderator
    DeathBySnuSnu's Avatar
    User ID
    7688
    Join Date
    Mar 2012
    Location
    Vicksburg MS USA
    Posts
    1,391
    FT Author
    2 Threads

    Default

    So in original trim.

    3400rpm is about 70mph.

    This where the original balance is made between speed, head temperature, and oil temperature.

    It should happily slug along at 3750 at 81mph but your head temperature and oil temperature will be all the way to max acceptable. (Assuming all systems are in perfect factory working order)

    Because we are light and have the engine in the open air we can get away with more than a car can.

    An up-geared trans is nicer in a trike.

    Stock valve springs will go around 4000rpm.

    Stock crank will go around 5000rpm (because of balance, not strength)

  7. #7
    400+ Posts
    Gold Club Member
    Sidecarbill's Avatar
    User ID
    18278
    Join Date
    Feb 2015
    Location
    Sussex nj usa
    Posts
    597

    Default

    Mines a 68 auto stick. The interesting part in the maual is that top speed and cruising speed are the same. Can't speak for others but my stone stock 1500 wpould be hard pressed to see 78 mph. Maybe with a tail wind down a mine shaft.

  8. #8
    Old Redneck Motorhead
    VW Tech Contributor
    TrikeTalk Moderator
    DeathBySnuSnu's Avatar
    User ID
    7688
    Join Date
    Mar 2012
    Location
    Vicksburg MS USA
    Posts
    1,391
    FT Author
    2 Threads

    Default

    I can get 78 at the very top of second gear.

    Screenshot_20170207-110122_zpsj6tarbs9.png

  9. #9
    100+ Posts sonny8l3's Avatar
    User ID
    17834
    Join Date
    Oct 2014
    Location
    Livingston (Colyell ), Louisiana, USA
    Posts
    110

    Default

    Thanks folks, I'm going to mount the tach today.I'm going to meet another fella with a VW trike from Livonia and we're going to Slidell for a car show Saturday. He said he runs at 70 or so, so I will see what it's like to do 70 for a while. I usually run serface roads at about 60. I'm interested to see how Mable does with the extra wind too. Thanks form your time

    By the by, any one in this area interested in a car show, 9-15-18 is the Crab Fest in Slidell to benefit Autisum and 2 veterans.

  10. #10
    Old Redneck Motorhead
    VW Tech Contributor
    TrikeTalk Moderator
    DeathBySnuSnu's Avatar
    User ID
    7688
    Join Date
    Mar 2012
    Location
    Vicksburg MS USA
    Posts
    1,391
    FT Author
    2 Threads

    Default

    I may be trying to organize something here in Vicksburg.

Page 1 of 2 12 LastLast

Similar Threads

  1. Erratic RPMs
    By Tricycleman in forum GL1800 Tech Forum
    Replies: 7
    Last Post: 10-04-2017, 03:59 PM
  2. Cruising The U.P. of Michigan
    By 427dave in forum Trike Travel
    Replies: 0
    Last Post: 07-28-2017, 09:48 PM
  3. Replies: 6
    Last Post: 12-29-2016, 01:05 PM
  4. Tri-Glide Cruising at 90 MPH
    By DK Custom Products in forum Harley Tri Glide
    Replies: 7
    Last Post: 05-30-2015, 01:54 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •