Jump to content


Photo
- - - - -

Fast Idle


  • Please log in to reply
4 replies to this topic

#1 johnR

johnR

    Camshaft & Stage Two Head

  • Members
  • PipPipPipPipPipPipPipPip
  • 1,647 posts
  • Location: Dorset

Posted 29 July 2020 - 11:09 AM

I've finally found the correct ratio of mixture and advance to make my car go well, but the idle speed is a little high. The adjuster isn't even touching the choke quadrant so I can't lower it that way. When I was 'Vizarding the throttle spindle I noticed a small hole drilled through the butterfly - is it necessary? (HS4) - would soldering it up lower the revs?



#2 robert.hedges

robert.hedges

    On The Road

  • Noobies
  • PipPip
  • 36 posts
  • Location: Sheffield

Posted 31 July 2020 - 06:25 PM

Yes. Also if you've fitted new spindle bushes check the flow past they need an extra tap once you've refitted the throttle disc

#3 Chris1275gt

Chris1275gt

    Mini Mad

  • TMF+ Member
  • PipPipPipPip
  • 279 posts
  • Location: Reading

Posted 31 July 2020 - 07:35 PM

I've finally found the correct ratio of mixture and advance to make my car go well, but the idle speed is a little high. The adjuster isn't even touching the choke quadrant so I can't lower it that way. When I was 'Vizarding the throttle spindle I noticed a small hole drilled through the butterfly - is it necessary? (HS4) - would soldering it up lower the revs?


This was the advice given to me by Moke on my HS4~

It's there to reduce NOX on the over-run.

Solder it up.

So I just changed the butterfly to a plain one and cured my problem and has worked fine since.

#4 sonscar

sonscar

    Speeding Along Now

  • Members
  • PipPipPipPipPip
  • 442 posts
  • Location: crowle
  • Local Club: none

Posted 01 August 2020 - 08:41 AM

If you have had the butterfly out is it the right way around as they are slightly tapered,also they take a bit of centerings causing them to bind.If not ignore this.Steve..

#5 johnR

johnR

    Camshaft & Stage Two Head

  • Members
  • PipPipPipPipPipPipPipPip
  • 1,647 posts
  • Location: Dorset

Posted 02 August 2020 - 04:18 PM

Thanks all, will solder it up.






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

Mini Spares