suspect tacho???

Discussion in 'Engine & Transmission' started by ontheballpaul, Nov 26, 2017.

  1. ontheballpaul

    ontheballpaul New Member

    Messages:
    2
    Location:
    Port Macquarie
    i am driving a 74 2.0 litre 4 speed kombi and have just got back from a round trip from port macqaurie to yamba and back ( about 4 1/2 hours in each direction ) while cruising at a steady 100kph ( checked with gps app on phone ) engine temp showing about 105 degrees and oil pressure a a constant 300 kpa, my tacho was reading between 5500 and 5750 rpm.
    had never really paid much attention to tacho before as engine certainly runs well at highway speed, but noticed other kombi's at the meeting had their redline on their tacho's set at 4500rpm.
    please tell me my tacho is not showing true engine speed, and if so what revs would i be doing at 100kph?
     
  2. Barry

    Barry Well-Known Member

    Messages:
    2,449
    Location:
    Abbotsford NSW
    G'day and welcome to Kombi Club

    It will all depend on what gearbox you are running

    Do you have any idea what is in your bus?
     
  3. ontheballpaul

    ontheballpaul New Member

    Messages:
    2
    Location:
    Port Macquarie
    hi barry, original gearbox as far as i know, motor has been rebuilt and original 1.8 heads were replaced with 2.0 litre heads, but from what i can work out gearbox is original?
     
  4. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    18,153
    Location:
    Bracken Ridge, Qld
    If you engine was revving that high & without an oil cooler your oil temp (take it is an oil temp gauge you've got) would be much higher :rolleyes:
     
  5. twincabay

    twincabay Active Member

    Messages:
    555
    Location:
    port maquarie
    Paul what kombi do you have and who is your mechanic? im local.
    Mitch
     
  6. Grantus

    Grantus Well-Known Member

    Messages:
    14,167
    Location:
    Southern ACT
    I’m impressed, if you have a 2 litre actually capable of screaming at 5750 rpm! :rolleyes:

    And Welcome to the Kombi Club! :)
     
  7. paul77

    paul77 Well-Known Member

    Messages:
    920
    Location:
    Brisbane
    Is it one if those tachometers with 4-6-8 cyl switch. Could be set to 8?
     
  8. Mellow Yellow 74

    Mellow Yellow 74 Active Member

    Messages:
    781
    Location:
    Sydney
    Also depends on the wheels and tyres you are running, maybe not enough to explain such a large difference but will affect engine revs if different to standard
     
  9. David H

    David H Well-Known Member

    Messages:
    2,995
    Location:
    newcastle
    I wish;) or I'm very scared for you:p.
    Hi ontheballpaul,
    Welcome to KC & nice you're using your bus to get 'out & about'!
    Would truly doubt rpm indication as reported. Don't have oil temp gauge nor oil pressure gauge in mine:oops:. Just a long time in them. My ear says 3600 to 3800 should be about right at 100/110 depending on box/engine combo.
    & then looked up to confirm information;).
    2-litre Kombi - 29.67 km/h per 1000 rpm - 3707 rpm at 110 km/h
    Cheers
     
    Last edited: Nov 27, 2017
  10. David H

    David H Well-Known Member

    Messages:
    2,995
    Location:
    newcastle
    Don't think it can;). Bottom end of horizontally opposed won't cope:(.
    Orange one downhill onto Hawkesberry river crossing in '82 saw 160kph ...yes off the speedo.... which equates to 5200 & it was screaming! Only time I've ever done that in a kombi....needed the downhill:p. Solid lifters..2litre.
    Cheers
     
    andrewjdriscoll likes this.
  11. twincabay

    twincabay Active Member

    Messages:
    555
    Location:
    port maquarie
    BTW Paul we need photos!
    3800 Rpm at 100kl with a 1600.
     
  12. saabman

    saabman Well-Known Member

    Messages:
    4,720
    Location:
    Goulburn
    Sounds like a taco problem to me - your poorv ngunevwould be lettuce no you know it wasn’t happy spinning that fast
     
  13. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    18,153
    Location:
    Bracken Ridge, Qld
    Took Igor off the speedo when bringing him home from Orange NSW up the Newell, flat stretch ...... 2L engine slightly worked and twin 40mm Dellortto's (built by Peter Keegan) ...... :eek: no idea of rpm as no tacho ...... spoke to Peter a few days later and he was impressed I did 1100 klm in 11.5 hrs - a nice Sunday drive :confused:.

    Leaving Nambucca in 2005 heading back to Valla my brother said Igor was a freak as Kombi's weren't supposed to pull like he did :cool:
     
    David H likes this.
  14. David H

    David H Well-Known Member

    Messages:
    2,995
    Location:
    newcastle
    Impressed Bert:). My girl needed the downhill;).
    Cheers
     
  15. Grantus

    Grantus Well-Known Member

    Messages:
    14,167
    Location:
    Southern ACT
    You guys need a T-shirt I’ve seen:

    “The older I get,....... the faster I used to go”. :eek: (Back in the good old days.)

    :p
     
  16. David H

    David H Well-Known Member

    Messages:
    2,995
    Location:
    newcastle
    What size for you Grant & Bert? We'll get a few made whilst I can still remember;):p:D.
    Cheers
     
  17. Grantus

    Grantus Well-Known Member

    Messages:
    14,167
    Location:
    Southern ACT
    Remember what? Who???? :eek:

    My current Kombi’s still go quite quick.;)

    Nap time soon.....pass. :p
     
    Last edited: Dec 10, 2017
  18. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    18,153
    Location:
    Bracken Ridge, Qld
    oldman likes this.
  19. Wayne murray

    Wayne murray Well-Known Member

    Messages:
    1,683
    Location:
    Seven hills
    I thought they need a shirt with"I'm still dreaming good old days":p
     
    David H likes this.
  20. David H

    David H Well-Known Member

    Messages:
    2,995
    Location:
    newcastle
    Starting to have trouble remembering them:p;):D until I drive 'old boy' & then the memory floods back of the good times:cool:!
    Cheers
     

Share This Page