 Carb jet sizing, input needed |
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| dfelz |
 Mar 22 2013, 02:12 AM
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beach bum  Group: Members Posts: 419 Joined: 7-June 12 From: San Diego Member No.: 14,538 Region Association: Southern California 
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I have dual webber 40 IDFs I am in the process of rebuilding for my 1911cc engine. One of my idle jets needs replacing and since i am order one i wanted input of sizing, to see if i should change the other three as well. I looked at a sizing chart and factory is a 28 venturi with 1.15 main and .5 idle. I have 30 venturi installed, so that means more air flow, which should also be accompanied by more fuel flow to stabilize the ratio. I was thinking a 1.30 main and a .55 idle...... want your input.
ALSO, i am either ordering from cb performance or aircooled.net, unless someone else has other sources.... but when i was comparing the prices, aircooled is over double per jet... but they do state that their product is NOT from china, and cb doesnt list a supplier..... anyone know if cb's are china products??? Thanks!! (IMG:style_emoticons/default/beerchug.gif) |
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Posts in this topic
dfelz Carb jet sizing Mar 22 2013, 02:12 AM
michael7810 My 1911 has 50/135s and runs good. I've tried... Mar 22 2013, 07:24 AM ThePaintedMan David,
Those venturis are on the border of too ... Mar 22 2013, 07:39 AM
michael7810 I'm running 32 vents. The engine died at 5k rp... Mar 22 2013, 08:39 AM  |
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