The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
It is currently Thu Mar 28, 2024 5:52 pm

All times are UTC




Post new topic  Reply to topic  [ 958 posts ]  Go to page Previous 148 49 50 51 5264 Next
Author Message
PostPosted: Sun Apr 02, 2017 12:03 am 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Fri Feb 14, 2014 7:27 pm
Posts: 383
Location: Bristol
Isn't there normally more than one return spring attached to the bracket (yellow on Mahesh's car) above the inlet manifold?


Top
   
PostPosted: Sun Apr 02, 2017 5:29 am 
Offline
TDC Member

Joined: Fri Jan 08, 2016 9:00 pm
Posts: 1014
Quote:
Isn't there normally more than one return spring attached to the bracket (yellow on Mahesh's car) above the inlet manifold?
Early 1850 linkages had 3 springs, later linkage systems had 1 spring, I think Sprints are the same. This cut down on spindle wear.


Top
   
PostPosted: Sun Apr 02, 2017 5:12 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Thu Oct 06, 2011 1:13 am
Posts: 3173
Location: The continent
Depends on carb. Ones that have a self return spring around the throttle shaft only need a spring on the mechanism. Carbs which don't have a return spring of it's own do need an external one.

Jeroen

_________________
Classic Kabelboom Company. For all your wiring needs. http://www.classickabelboomcompany.com


Top
   
PostPosted: Sun Apr 02, 2017 5:23 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Thu Oct 06, 2011 1:13 am
Posts: 3173
Location: The continent
Here a pic. In the red box you see the differences. You always need one returnspring per carb and one on the mechanism. So it depends on the carb howmany and what type of spring you have to use.

Jeroen


Attachments:
mgb_20_03_01.jpg
mgb_20_03_01.jpg [ 95.93 KiB | Viewed 1629 times ]

_________________
Classic Kabelboom Company. For all your wiring needs. http://www.classickabelboomcompany.com
Top
   
PostPosted: Wed Apr 05, 2017 2:42 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Wed Jul 22, 2015 12:58 pm
Posts: 1293
Location: London
On the new manifold there is an extra threaded hole, is this for a vacuum gauge ?,
or am I missing something ?

For now I have just put a bolt in.


Attachments:
inlet manifold 2017-04-05 14 36 37.jpg
inlet manifold 2017-04-05 14 36 37.jpg [ 125.46 KiB | Viewed 1569 times ]

_________________
NRW 581W Sprint


On the motorway no one can hear me sing!
Construed as a public service, self preservation in reality.
Top
   
PostPosted: Wed Apr 05, 2017 3:18 pm 
Offline
TDC Member
User avatar

Joined: Wed Jul 04, 2007 12:27 pm
Posts: 1909
Location: Hampshire
Yes, I suspect so. Aluns new Sprint at the NEC had one in the same place leading to the vacuum gauge.


Top
   
PostPosted: Tue Apr 18, 2017 12:13 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Wed Jul 22, 2015 12:58 pm
Posts: 1293
Location: London
Got bored with the bolt, so put a gauge in,

but even at idle it does fluctuate a lot between
the two points, (1/20th sec) rpm tacho is stable.

I don't think it's a vacuum leak at that speed of
fluctuation, more likely rotor or cap.

Must get going on the 123 dizzy.


Attachments:
2017-04-18 12.07.17.jpg
2017-04-18 12.07.17.jpg [ 137.86 KiB | Viewed 1511 times ]
2017-04-18 12.07.02.jpg
2017-04-18 12.07.02.jpg [ 138.05 KiB | Viewed 1511 times ]

_________________
NRW 581W Sprint


On the motorway no one can hear me sing!
Construed as a public service, self preservation in reality.
Top
   
PostPosted: Wed Apr 19, 2017 3:46 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Tue Oct 03, 2006 9:45 pm
Posts: 11179
Location: Middlesex
You sure its not just registering the pulses you will get in the manifold at idle? I;d suspect it gets steadier at higher revs?

Dont forget it only fires on each pot every other turn...

Jonners

_________________
Note from Admin: sadly Jon passed away in February 2018 but his humour and wealth of knowledge will be fondly remembered by all. RIP Jonners.


Top
   
PostPosted: Wed Apr 19, 2017 4:00 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Wed Jul 22, 2015 12:58 pm
Posts: 1293
Location: London
I straightened up the gauge this morning, and tweaked the mixture and idle, to reduce
the movement, this has resulted in the rpm settling and has smoothed
the engine a bit. (Something put on for novelty value actually done some good :D )

You are right Jon, it does smooth out somewhat at higher revs, and as it's a dry
gauge, twitchyness must be part and parcel, or so it seems.


Attachments:
2017-04-19 15.57.08.jpg
2017-04-19 15.57.08.jpg [ 135.41 KiB | Viewed 1478 times ]

_________________
NRW 581W Sprint


On the motorway no one can hear me sing!
Construed as a public service, self preservation in reality.
Top
   
PostPosted: Wed Apr 19, 2017 6:09 pm 
Offline
TDC Member

Joined: Sun Mar 16, 2008 2:52 pm
Posts: 2303
Hi Mahesh, When I had my original Mini, I put all sorts of after market gauges in it. Including the very colourful Smith's vacuum gauge. Now this was supplied with a length of clear plastic pipe and something called a "restrictor " I seem to remember this had to be installed at the manifold end which had to be tapped 1/4in BSF and the idea was to remove vibration on the needle but not so much as to stop the rapid vibration due to weak valve springs. I'll see if I can find the details.
HTH,
Tony.


Top
   
PostPosted: Wed Apr 19, 2017 9:26 pm 
Offline
TDC Member
User avatar

Joined: Sat Apr 12, 2014 11:02 pm
Posts: 2279
Location: Nr Kenilworth
I have a 4 gauge set up for bike carbs and they have screw restrictors on each gauge pipe to stop fluctuations. Not normally needed on a shared manifold but maybe pinching the pipe with thumb and finger until it stops may prove it.
Tony

_________________
Membership 2014047


Top
   
PostPosted: Wed Apr 19, 2017 10:10 pm 
Offline
TDC Member
User avatar

Joined: Wed Jul 04, 2007 12:27 pm
Posts: 1909
Location: Hampshire
I'm just surprised that the gauge isn't day glo acid house pink! :lol:


Top
   
PostPosted: Thu Apr 20, 2017 12:55 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Tue Oct 03, 2006 5:52 pm
Posts: 7566
Location: Halifax, West Yorkshire
Don't be putting ideas into his head. We've already seen his colour-coded axle stands.

_________________
Toledo Man

West Yorkshire Area Organiser & forum moderator
Meetings take place on the first Wednesday of the month at 8.00pm at The Old Brickworks, Wakefield Road, Drighlington, Bradford, BD11 1EA

1972 Dolomite 1850 auto (NYE 751L - Now for sale)
2003 Volvo XC90 D5 SE (PX53 OVZ - The daily driver)
2009 Mercedes-Benz W204 C200 CDI Sport (BJ58 NCV - The 2nd car)
1991 Toyota Celica GT (J481 ONB - another project car)
Former stable of SAY 414M (1974 Toledo), GRH 244D (1966 1300fwd), CDB 324L (1973 1500fwd), GGN 573J (1971 1500fwd), DCP 625S (1977 Dolomite 1300) & LCG 367N (1975 Dolomite Sprint) plus 5 Acclaims and that's just the Triumphs!

Check my blog at http://triumphtoledo.blogspot.com
My YouTube Channel with a bit of Dolomite content.

"There is only one way to avoid criticsm: Do nothing, say nothing and BE nothing." Aristotle


Top
   
PostPosted: Thu Apr 20, 2017 1:32 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!
User avatar

Joined: Wed Jul 22, 2015 12:58 pm
Posts: 1293
Location: London
Don't forget the yellow multimeter

_________________
NRW 581W Sprint


On the motorway no one can hear me sing!
Construed as a public service, self preservation in reality.


Top
   
PostPosted: Thu Apr 20, 2017 2:53 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Tue Oct 03, 2006 9:45 pm
Posts: 11179
Location: Middlesex
So does this mean you have to have the bonnet cracked open so you can see it when you are driving?

Looks to nice a gauge to be wasted in the dark...

Jonners.

_________________
Note from Admin: sadly Jon passed away in February 2018 but his humour and wealth of knowledge will be fondly remembered by all. RIP Jonners.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 958 posts ]  Go to page Previous 148 49 50 51 5264 Next

All times are UTC


Who is online

Users browsing this forum: No registered users and 42 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited