Formula Ford Carburettor Question

Flavio Galtieri · 22 Sep 2007, 09:54 (Ref:2020318)

I'm starting to prep a FF1600 for the first time in 22 years and I've forgotten rather more than I thought possible....

The carb, a rather newer version of what I remember, is only squirting fuel into one venturi when the throttle is depressed.

Shouldn't it be adding fuel to both?

Sorry if it's a daft question but I'm having one of those mornings.....

GORDON STREETER · 23 Sep 2007, 20:56 (Ref:2021274)

Just about all the dual choke carbs that I have encountered only inject into one side , normally the primary.

zefarelly · 24 Sep 2007, 11:24 (Ref:2021627)

Gordons right, I'm sure the crossflow carb is the same in operation as the DCD on precrossflows

of course you wouldn't dream of gearlinking the 2 chokes and double drilling the accelerator pump jet !!!

GORDON STREETER · 24 Sep 2007, 13:06 (Ref:2021728)

Heaven forbid Zef !

zefarelly · 24 Sep 2007, 19:44 (Ref:2022028)

The Reverand of Kent has spoken

bdwoody · 24 Sep 2007, 20:44 (Ref:2022092)

aint that a granada carb 40 dgas or some thing of the like?

GORDON STREETER · 24 Sep 2007, 22:19 (Ref:2022165)

Granada yes I've been to see the Alhambra Palace there a couple of times its a bit inland from me !

StephenRae · 25 Sep 2007, 08:06 (Ref:2022349)

Quote:

Originally Posted by bdwoody

aint that a granada carb 40 dgas or some thing of the like?

Technically...... that was referred to as a 'double ****er'

StephenRae · 25 Sep 2007, 08:08 (Ref:2022352)

I've just been autocensored .....urinator doesn't seem to have the same ring to it!

bdwoody · 26 Sep 2007, 21:14 (Ref:2023892)

i think i've got one of those double ...... carby tooters in the shed some where with spiders in it i remember it working real good on the old x flow powered starlet. ah those where the days....

Séamas M. · 1 Oct 2007, 07:43 (Ref:2027597)

From the FF1600 Technical Regulations....

........
5.3 INDUCTION
a) The air cleaner may be removed or replaced and a trumpet fitted.
b) Carburettor Type: Weber 32/36 DGV and DGAV (from 1600 GT "Kent" or 2000 SOHC NE engine).
Number on engine 1
Number of Main Venturi 2
Maximum dia. of Main Venturi 26.0/27.0mm
Maximum dia. of carb outlet to inlet manifold 32.0/36.0mm
c) It is permitted to change jets, open both throttles together, remove cold start devices and diffuser bar, fit internal and external anti-surge pipes, remove seals on emission control carburettors. No other modifications are permitted, chokes must remain standard and no polishing or reprofiling is permitted. Any means of reducing intake air temperature is prohibited. Any form of water injection is prohibited.
........

I used to find that opening both chokes made no appreciable difference (from the driving seat) but it sure did sound good.

GORDON STREETER · 1 Oct 2007, 08:09 (Ref:2027616)

I modded a carb for a Kent FF some while back for a mate and made both chokes open together, but I didn't realise at the time it was legal

Al Weyman · 1 Oct 2007, 09:44 (Ref:2027695)

I would have thought a progressive opening chokes would have worked better especially coming out of corners on a wet day. I use 4 barrel Double Pumpers with mechanically accuated butterflys so the theory is the same and I would not want to set them to all open together as it would be all or nothing and a trip into the barriers on a wet day. However with these carbs you do get a shot of petrol into each barrel.

GORDON STREETER · 1 Oct 2007, 12:54 (Ref:2027866)

[quote=Al Weyman]I would have thought a progressive opening chokes would have worked better especially coming out of corners on a wet day.

Al , I bet the Kent FF boys wish they could get that much power out of the old Ford lump !

Al Weyman · 1 Oct 2007, 13:07 (Ref:2027880)

True, true!

esper · 1 Oct 2007, 20:47 (Ref:2028288)

i am still waiting for someone explaining the ultimate inlet tube modification trick. realy somebody has to do it!!!

sunseeker · 5 Oct 2007, 14:53 (Ref:2032074)

you mean like in nascar... putting oxygenated gel in the intake manifold

nice... where the hell would you buy that stuff! lol... not at home depot! thats for sure....

Flavio Galtieri · 6 Oct 2007, 09:20 (Ref:2032712)

Thanks a lot everyone; it's confirmed it should only squirt into one. What confused me was that the down draft Weber on the FVee we've been running squirts into both.

This FFord hasn't run for more than a year so apart from the clutch disintegrating after 10 laps running we have had a persistent misfire appear at 6200 in top just after changing from third so I'm just going through the usual checks.

Still two weeks to go to the Festival at Brands.....loads of time

SidewaysFeltham · 6 Oct 2007, 09:53 (Ref:2032729)

Quote:

Originally Posted by esper

i am still waiting for someone explaining the ultimate inlet tube modification trick. realy somebody has to do it!!!

Simple! Place either a turbocharger or a supercharger between the air and the head!