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32/36 Jet sizes smooth a15 daily driver
Home away from home
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Hi I'm not looking to build up anything crazy and was wondering what jets and bits I need to set up the carb correctly during my rebuild to play nicely with an a15?
Cheers,
Tom

Posted on: 2016/7/27 6:39
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Re: 32/36 Jet sizes smooth a15 daily driver
No life (a.k.a. DattoMaster)
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I can tell you a set up that's wrong, being hard to start, no torque from idle & bad fuel consumption on a stock A15, that's a 50 idle jet, a 125 main jet & a 135 secondary. I can remember what air corrections are in it. The carby is a weber 28/30DGV that was a bit rich on an A12 with a 120 main & a 125 secondary. I plan to jet back to a 45 idle jet, a 120 main & keep the 135 secondary, plus fit up the choke. & fix the exhaust leak & move the dizzy back as it's overadvanced at the moment. The carby has really small venturis & I fitted it to replace a Chinese copy carby that was untunable. I'm looking for torque more than top end. I've recently decided I'm going to fit an L20B with a 32/36 DGV, so I'm not going to get too involved with it.

Posted on: 2016/7/27 9:17
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Re: 32/36 Jet sizes smooth a15 daily driver
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Yes, that Weber 28/30 would too small for an A15. The Weber 28/30 DFTH has 21/23 venturis, smaller than the stock A15 Hitachi which has 21/27 venturis

By contrast the Weber DGV has 26/27 venturis - too big a primary to be optimum, but runs fairly well even so, and flowing more than stock at higher RPMs. The best thing about a DGV is a brand new one (not ebay) is only $338. As far as I'm aware, there are no new A15 carbs, only new A12 carbs. There are remanufactured A15 carbs for $282

Posted on: 2016/7/27 10:08
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Re: 32/36 Jet sizes smooth a15 daily driver
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See this link for standard new weber jetting
http://www.racetep.com/webercarbjet.html

My friend recently fitted the 32/36 to his standard A15 and hes happy with it, bought the jetting kit also but had no need for it.

I bought a 38DGAS at the same time for my slightly built A15 and that works fine with the std jetting also.

Just make sure you follow the weber tuning instructions to the letter, dont think you know best and fiddle with it willy nilly, follow the instructions.
http://www.redlineweber.com/html/Tech ... set_up_and_lean_best_.htm

Posted on: 2016/7/28 5:08

Edited by thaifrog on 2016/7/28 7:08:29
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Re: 32/36 Jet sizes smooth a15 daily driver
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Thanks very much for the replies really appreciate it especially the tuning guidelines

Posted on: 2016/7/28 5:29
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