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Originally Posted by Eljaro
Well, glad to hear that the 40mm Venturis work well on a 302 also.
Dont know how come the word spread that the 37mm were the chokes to use for everyday driving.
Maybe for the layman in anything mechanic it is best to leave the webers as they come, but for anyone wanting to tinker around it is fun and definitely brings driving improvement. Doesn't it ?
I bet once you try larger chokes you get the real Weber feeling.  |
600cc(292ci) per cyl----38mm for Hi Perf Road---41mm for competition
650cc(318ci)-----------40mm-------------------42mm
700cc(342ci)-----------40mm-------------------43mm
750cc(366ci)-----------42mm-------------------44mm
800cc(390ci)-----------42mm-------------------45mm
850cc(415ci)-----------42mm-------------------45mm
Starter main jet size is approx choke size x 4 ( eg 45mm choke = 180 main)
On IDA Air Corr should be about 40/50 less than jet for comp- perhaps 30/40 less for road. Use Air & Emulsion to tune for each individual engines characteristics- Once you get more than 10 away from that starter size of the main jet you are chasing Fairies!
Jac Mac