Performance potential with standard 34DATR weber carb

[75coupe]

Hello all,

I am after advise on the performance potential of the std carb for my 2 liter coupe. I have just won the 1601-2000cc road registered class in the 2009 Tighe cams hillclimb series in QLD Australia, but to compete next year in the same class the rules say I need to remove my nice twin 45 DCOE sidedraughts and fit the standard manifold and twin choke carb.....I can of course change class, but then I will be up against 200BHP+ modern injected multivalve machinery...unfortunatley there were no injected or VX cars sold in Oz so these can't be used either.

Any one had experience of what potential there is with std carb or a different type of twin choke carb? My engine already has 10.8:1 CR and I am fearfull of detonation with std carb.

Thanks in advance

Ian

[HFStuart]

You might try www.guy-croft.com - someone may have already asked the same.

If not Guy is usualy pretty forthcoming so long as you give him all the specs.

[75coupe]

Thanks Stuart, will contact Mr Croft, I know he manged to squeeze 150BHP out of a single carb 1600 TC, but it used a Ford V6 38DGAS carb which is no good for transverse applications.

[HFStuart]

One trick I have heard of in formulae that require an OE carb is to modify the 2nd butterfly mechanism so that both open in tandem rather than one then the other. It shouldn't be of any benefit but it was reckoned to be an advantage in the Skoda rally championship over here many years ago.

[75coupe]

Thanks for the advice Guys, but have decided to stick with my twin 45 set up and run a different class than use the painfull std carb.....