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> Correct fuel pressure for dual carbs?
terrymason
post May 16 2007, 11:16 PM
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I'm having alittle trouble getting my dual carbs dialed in, the 1st is rich, and the second is lean. My fuel pump was putting out 3.5psi, but the guy I bought my carbs from said I should run 2.6psi instead. What do you guys think?

I've got 60 idle jets and 180 mains, which I thought was overkill, until he told me that I should run 2.6 instead of 3.5 psi.
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rhodyguy
post May 17 2007, 09:52 AM
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sometimes a bit more info is helpful. no mention of the type of pump, type of fuel presure regulator (stand alone or incorperated in the pump itself) and whether you're using a good fp gauge. how does the engine run when you're off the idle circuit? how the carbs behave at certain engine speeds is important. are the plugs for one carb drastically dif colors? are you measuring the flow at idle 850-900rpm?

k
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terrymason   Correct fuel pressure for dual carbs?   May 16 2007, 11:16 PM
john rogers   I ran 3.5 PSI with my four cylinder engines and ab...   May 17 2007, 12:23 AM
So.Cal.914   3.0 lbs.   May 17 2007, 02:03 AM
lotus_65   2.5 lbs   May 17 2007, 06:25 AM
SGB   60s are mighty big. How big is the motor? for ma...   May 17 2007, 06:59 AM
type11969   The self-regulated pumps sold by VW shops for dual...   May 17 2007, 08:33 AM
rhodyguy   any other symptoms? snapping/popping back thru the...   May 17 2007, 09:35 AM
terrymason   any other symptoms? snapping/popping back thru th...   May 17 2007, 09:45 AM
terrymason   I'm running 60 idle jets, 140 main jets, and 1...   May 17 2007, 09:39 AM
rhodyguy   sometimes a bit more info is helpful. no mention o...   May 17 2007, 09:52 AM
terrymason   sometimes a bit more info is helpful. no mention ...   May 17 2007, 10:34 AM
type11969   If you have the dellorto superperformace tech book...   May 17 2007, 09:58 AM
rhodyguy   the only reason i suggest turning the idle up is t...   May 17 2007, 10:49 AM
Travis Neff   does your pump rattle a bunch? That would be an i...   May 17 2007, 10:57 AM
terrymason   does your pump rattle a bunch? That would be an ...   May 17 2007, 11:22 AM
type11969   Check to make sure your idles are clear, also veri...   May 17 2007, 11:00 AM
terrymason   I talked to Aaron from CB performance, who was awe...   May 17 2007, 11:08 AM
Gint   I talked to Aaron from CB performance, who was aw...   May 17 2007, 05:36 PM
rhodyguy   "no ammount of adjustments"...are you re...   May 17 2007, 11:15 AM
terrymason   "no ammount of adjustments"...are you r...   May 17 2007, 11:18 AM
type11969   Plugged idle jet or circuit   May 17 2007, 11:16 AM
Travis Neff   Sounds like you do have a facet pump. The CB rota...   May 17 2007, 11:24 AM
rhodyguy   facets suck. get #3193. the canister to the right ...   May 17 2007, 11:34 AM
terrymason   I have some 46 and 52 idle jets at home (60s insta...   May 17 2007, 02:18 PM
type11969   I'm running a 1.8, little warmed over than sto...   May 17 2007, 02:39 PM
anderssj   Terry, I have some spare jets here in Yorktown--m...   May 17 2007, 04:01 PM
type11969   :agree: I fought with my dells and got sick of s...   May 17 2007, 06:38 PM
r_towle   You may have a simple air leak at the intake bolts...   May 17 2007, 09:50 PM
terrymason   Well, I believe that I've found the main probl...   May 17 2007, 10:10 PM
Gint   It just plain makes good sense. You'll establ...   May 17 2007, 10:18 PM
terrymason   I'm still fighting this thing, and am ready to...   Jun 3 2007, 05:00 PM


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