Choosing air corrector jets for Dells?

[RUSS74GHIA]

Hi, does anyone know what size I shoul be looking at?

They're for my 1914 motor. Carbs are 40's with 34mm vents with 142 mains. I've been offered a set of 205s as a striaght swap for my 180s. Does this sound about right, or is there a formula I should be following.

Thanks in advance.

Russ

[nicolas]

the dellorto book says 180 all the time so you might want to hang on to them.

4x ventsize = main

4x 34 = 136 (so 135 will work, or try 140) make sure to have the right e-tubes, mine are wrong and the car runs but could be better 

[Bruce]

Do not trade away your 180 air jet holders, they are the only size you need for your carbs.  All others will be wrong.  There's a reason the other guy wants to get rid of his 205s, it's because they are the wrong size.

[RUSS74GHIA]

Thanks chaps, I'll hang onto them.

I've also got a set of 135 mains, so I guess these could be reamed out to 138/140 if required

[nicolas]

or try this link for jets.

shipping shouldn't be that much since your in the right country.

http://www.dellorto.co.uk/merchandise/products.asp?CategoryID=2&PartsectionID=51

[Bruce]

I've also got a set of 135 mains, so I guess these could be reamed out to 138/140 if required

Have you tried using the 135s? 

[RUSS74GHIA]

I've also got a set of 135 mains, so I guess these could be reamed out to 138/140 if required

Have you tried using the 135s? 

Not yet, the motor's rebuild isn't finished, well, I only picked up the mains/big end bearings yesterday. I'm trying to get everything ready so that I can be up and running as soon as the block's finished.

[Bruce]

Run the 135s. Then if they prove too small, ream them out.
My engine is quite happy with 135s in my 40DRLAs.