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Best Carb and Manifold
Disgruntled karter - 16/4/12 at 10:08 AM

Hi I've decided to build a LOCOST for racing in the 750MC series I'm just gathering the parts I need with the intention of building a pro comp chassis. I've managed to get hold of a complete Mk2 escort but its missing the card and manifold is there any specific carb that I should be looking for or are all carbs that meet the regs provide much the same performance. Thanks javascript:icon(''

Myke 2463 - 16/4/12 at 10:19 AM

Go to http://www.750mc.co.uk/images/uploaded/2012%20Regs%20-%20Locost.pdf

Will have all your answers.

Disgruntled karter - 16/4/12 at 11:29 AM

In the regs its states
Any single choke downdraught carburettor with maximum 26mm venturi, or any twin choke downdraught carburettor with one maximum 23mm choke and one maximum 24mm choke venturi may be used
So would a a single choke 26mm or a twin choke 23/24 be best and what would the actual carb designation be ?
Thanks Graham

ernie - 16/4/12 at 04:18 PM

most go for the twin choke DGV, with all the cold starting/choke stripped away

dave-69isit - 16/4/12 at 05:31 PM

Disgruntled karter - 17/4/12 at 07:38 AM

Many thanks for all the reply's think I've established that 32/36 DGAV is the way to go, my next question is that I believe that there is a difference in venturi size for carbs fitted to 1.3 GT's to those fitted to the 1.6's and pinto's and that these venturi are not changeable is this correct ? I'm a LONG way off it but don't want to turn up for my first race day and fail scrutinering Thanks Graham

Trollyjack - 17/4/12 at 08:27 PM

I think you will find that a 32/36 DGAV is not allowed these have 26/27 venturies these were fitted to 1600 crossflows and 1600 & 2000 pintos

You should get a 32 DGA or DGAV these have 23/24 venturies

Please check Mat at Procomp will confirm this

I may be wrong

modee - 17/4/12 at 08:56 PM

The venturi sizes are stamped on the body of the chokes above the throttle linkage. Maurice

Disgruntled karter - 18/4/12 at 07:18 AM

Ah yes that makes sense ! and I've just sourced a 32 DGAV with correct venturi so many thanks

Now .....Inlet manifolds I've seen 3 different types the 1300 fiesta with 2 individual input ports, a similar manifold but it has a single large input port, and finally a manifold with a single input port but the port is at 90 degrees to the other 2 so the carb would fit the other way round

any thoughts on which one is preferable... I'm guessing to a degree the carb orientation is governed by the throttle cable linkage

Thanks Graham

pointy - 18/4/12 at 04:00 PM

Get yourself down to Brands hatch weekend 28/29 April and have a nose around the paddock. Every Locost racer is more than willing to give you help and advice.

Andy p