Bike Carbs
Have become a sheep and have succumbed to buying a set of bike carbs and am going to try and fit them to the Pinto
At the moment it has a Webber DGAV 32/36 twin choked downdraught which is OK - but is nearly as old as I am and probably breathes better than me (If I havent got a rollie in my mouth im usually rolling one)
A set of snorting Webber or Dellorto twin40's or 45's would be nice - but I don't think Fizz would appreciate the indution roar or the fuel bills if she were to find out how much I had blown - so a cheaper route into easier breathing needed to be investigated
Consdiering at the moment the 32/36 has a theoretical choke size of 68mm shared amongst all 4 cylinders - and a set of 40's (fitted with 4x 32mm chokes) would equate to 128mm and a cost of around £500 - £600 with manifold and a range of jets so that it could be dialled in
Now consider that a set of 600cc/750cc motorcycle carbs can be picked up off fleabay for around £35 and will have 32mm chokes or 38mm possibly 40mm if you go for sets from an 1100...hmmmm
well I'm the proud owner of a set of 32mm choked Mikuni carbs that came from a Fazer 600 (Yamaha FZR/FZS 2 wheeled death trap) and come with a Throttle position sensor for when I'm ready for ditching the distributer in favour of Megajolt Jr
There seems to be too many upsides to this compared to the downside of having to source/manufacture a manifold to suit
the carbs are infinately tweakable - as they are a bit like a modern interpretation of the old SU carb - where there is a sliding air float with an adjustable seat needle that delivers the right ammount of fuel in the mid range
there is also a high speed main jet that will need drilling to suit for high / wide open throttle
- and an idle jet that is on a screwthread for the low end
They don't have any strange fuel pump arrangements and from what I have read they seem to be fit / adjust and forget - and are damned cheap compared to the Webber / Dellorto offerings
I have managed to source some chaps that will try and get a manifold together for mates rates so all in all it shouldn't cost a fortune to get the old Pinto breating a bit better
| Bike Carbs and rubber trumpets - click thimbnails for enlargements | |||||
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The carbs are with a man who can....hopefully
One of the chaps from the Locost club has got my carbs and is looking into getting a manifold manufactured for me- it looks like it is going to be a bit of a headache for him though - as the tubes will need several bends to accomodate the angle of the carbs and the difference in spacing compared to the cylinder head (s shaped pipes)
The 3D mapped ignition is well underway - and tonight we have had it fired up and running nicely using the Megajolt unit - so we are all systems go as far as getting a spark to happen at the right time without having to use the vaccum on the manifold or rely on bob weights
Bring on the manifold :-)
The carbs are installed!!!!
Got the manifold sorted - a big thanks to Nige and Kieth - who have done me proud
Been playing with the needles and idle and think I now have it somewhere close to perfection!!
They were running quite rich at anything above 1/8the throttle - but have been playin with the needle heights (luckily they have plenty of grooves and a nice set of shims - so fine tweeks are easy as it gets)
Not managed to get out for another spin - as the weather has turned very wet so is not ideal to be seeing what happens when I floor it !!!!
| Bike carbs fitted | ||||
First impressions- They sound awesome!!!!!
As the new carbs have provision for eating the crank case fumes an oil catch tank / breather had to be found
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