I am riving a 1600 in speedway
It has a l20 motor
mild cam extractors stock manifold and carby,
I am not allowed to use custom manifold and I want to know what is the best choice of carbies

you can get an adaptor plate and fit a 32/36 weber off a 2.0L escort/cortina.

when jetted for your application, these are a very good carb on an L series. many, many people have used them on this forum to great success.

the L series engines also came out with twin SUs - but that was only the L16 and L18. i'm not sure if that rule can extend to the L20 - you'd best check before looking into that.

but yes, they will be an improvement over the 32/36 and being a factory option you can also use the factory twin SU manifold.

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frankenstein projects R us.

The Republic of Western Australia -
Propping up the Nation's Economy since 1901.

I personally have a 32/36 on my wagon at the moment, and I get great fuel economy.

She goes quite good aswell.

Before that I had a stock 6 cylinder L series carby bolted to the manifold,

Same bolt pattern.

Car went a little harder, used more fuel though.

For speedway, I would personally drop on a pair of 40 mm webbers as you would be keeping it right on the am in the rev range all the way around the track.

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1970 P510 SSS sedan
1971 P510 wagon + spare shell
197? 180B SSS Coupe
1981 910 SSS with Z18et, Leather interior