02GF74
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| posted on 29/3/07 at 10:02 AM |
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spring for accelerator
I want to make my accelrator pedal hard to push by adding another spring.
One way to do it would to put a metal right-angle strip between the carbs and hang a spring off it to the lever - as shown in red.
Is this a bad place as the carbs are able to move a bit to relative to each other so the carb bolts become undone or worse strip?
And over time, will the metal fatigue? (planning to use aluminium for this).
 
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Bob C
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| posted on 29/3/07 at 10:16 AM |
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Best place for it. If there's a bit of flex I'd use thin (1mm) stainless bent into an 'angle iron' section over most of its
length, but leave flat near the 2 screws
Bob
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Bob C
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| posted on 29/3/07 at 10:17 AM |
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PS you've drawn it screwed to jet cover screws - don't use them use the float chamber screws
Bob
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Mr Whippy
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| posted on 29/3/07 at 10:20 AM |
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That’s a very odd thing to do cos on long journeys your foot will hurt. I personally make it as light as possible with loads of travel for better
control.
If you insist on making it heavy don't load the cable as it will judder and ware out quickly. Rather use a spring pushing against the peddle
it’s self. Heavy springs on the carb will ware out the throttle spindle bushes and then they’ll bleed air in.
[Edited on 29/3/07 by Mr Whippy]
Fame is when your old car is plastered all over the internet
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02GF74
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| posted on 29/3/07 at 10:22 AM |
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quote:
Originally posted by Bob C
PS you've drawn it screwed to jet cover screws - don't use them use the float chamber screws
Bob
well soptted - it is the float chamber screws I plan to use; as below.
 
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02GF74
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| posted on 29/3/07 at 10:25 AM |
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quote:
Originally posted by Mr Whippy
That’s a very odd thing to do cos on long journeys your foot will hurt. I personally make it as light as possible with loads of travel for better
control.
at the moment the only springs are that on the carb linkages which is too soft. The small spring I have will stiffen it up but not a great deal. (I
may end up putting one on the acceleator pedal too)
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Mr Whippy
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| posted on 29/3/07 at 10:26 AM |
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see edited text ^^^
Fame is when your old car is plastered all over the internet
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Mr Whippy
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| posted on 29/3/07 at 11:01 AM |
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Looking at your set up with the very long unheated inlet manifold I can't help thinking 'he’s got carb icing problems...' very
common occurrence with after market carbs and K&N type filters.
Does the throttle get stuck after a while especially on a cold day and when your gunning it. Sitting in traffic and it idles like crazy? That’s carb
icing and stronger springs will do nothing, giving the carbs warm air on a cold day will. Alternatively there are little electric blanket things you
can get which wrap around the manifold and keep it warm.
[Edited on 29/3/07 by Mr Whippy]
Fame is when your old car is plastered all over the internet
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02GF74
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| posted on 29/3/07 at 11:14 AM |
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funnily enough I was thinking about carb icing the other day.
but to answer your question, not had it happen yet - drove it last thurs when it must have been a couple of degrees C plus some light sleet/rain.
the extra spring is really for a better pedal feel; I'll take on board your advice and not fit it on the carbs but on to the accelerator pedal
itself.
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BenB
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| posted on 29/3/07 at 11:57 AM |
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Sounds a much better plan to put the spring on the pedal.... Rebuilding carbs isn't many people's idea of fun and they can be a bit
fragile...
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Ivan
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| posted on 29/3/07 at 02:36 PM |
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Just looking at the photo - the carbs look solidly mounted to the manifold - isn't it more correct to have side-draughts more flexibly mounted
with spring loaded bolts or O rings or am I showing my age?
[Edited on 29/3/07 by Ivan]
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02GF74
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| posted on 29/3/07 at 02:37 PM |
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quote:
Originally posted by Ivan
Just looking at the photo - the carbs look solidly mounted to the manifold - isn't it more correct to have side-draughts more flexibly mounted
with spring loaded bolts or am I showing my age?
you are right - well spotted!!! That is an old photo; since then studs were fitted with the proper thackery washers.
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cossiebri
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| posted on 29/3/07 at 03:39 PM |
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IIRC you must also have 'misab'? plates so the fuel doesn't 'froff' up.
Why don't you just order a twin carb linkage kit ? you get the throttle return springs and all mountings/washers etc in the kit.the proper tool
for the job
If it doesn't fit MODIFY it!!
Cheers BriF
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02GF74
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| posted on 30/3/07 at 10:08 AM |
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quote:
Originally posted by cossiebri
IIRC you must also have 'misab'? plates so the fuel doesn't 'froff' up.
Why don't you just order a twin carb linkage kit ? you get the throttle return springs and all mountings/washers etc in the kit.the proper tool
for the job
Pay £ 50 quid???  or fit a 30 p spring? hmmm, let me think abou that.
the linkage on the carb is a cam with a guide for the wire so not sure if that can be modified to use the rod types. The current arrangement works
so don't se the point is splashing out cash - when I ge round to fitting 1600 engine, I may need to re-evaulated ths situation since I would
need lower profile mechanism (you cna get different manifold for 1300 and 1600, maybe the latter is more horizontal).
Anyway, the spring is fitted between the lever and fixed via right-angle plate that the cable adjust goes though; feel better but still a bit soft;
will see how I get on with that.
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