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Discussion Starter #1
Just curious about the size of the chokes on my DRLA 40's.

They currently have 32 chokes.

Would there be any benefit increasing the size of these with standard cams?
And what changes would I need to make with the carbs jets etc?

At the moment the mains, 142, work just great.
But always had an issue with the idles up to 3000 rpm.

53's seem a bit hesitant and lean. Recently put 55's in, more power yes but sometimes I get an occasional nosedive due to too much fuel going in under very hard acceleration.

Maybe 34 chokes with the 55 idles?


Regards

Chris
 

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Discussion Starter #2
I will try modifying the cold air intake tubes/lengths first as they are not standard.
 

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Hi Brit
32mm chokes are just about the biggest that can go with the 40 bodies - if you go to 34 or bigger chokes then you should go to 44 or 45 bodies. but that sort of size in a 1.7 engine would also need the revs up over 5-6000 rpm ie race engine type spec/use. So I would stick to the 32mm in the 40 for road use - far more tractable.
 

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Discussion Starter #4
Thanks mate. Yes that's the feedback I'm getting.

Have to have a closer look at the idle circuit and air intakes.
:thumbs:
 
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