 Correct fuel pressure for dual carbs? |
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| terrymason |
 May 16 2007, 11:16 PM
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Member  Group: Members Posts: 346 Joined: 23-November 05 From: Virginia Beach Member No.: 5,174  |
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 |
May 17 2007, 10:49 AM
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,249 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
the only reason i suggest turning the idle up is to steady the needle on your syncro tool. the pulsing at reg idle can make the neelde flucutate a bit. i prefer a steady reading. if the front 2 throats are flowing the same, move on to the next step. there's lots to the equation...potencial vac leaks at the intake to heads all the way to the base plates for the linkage. you'll like the self regulated rotary pump from cb. start with a set of 50s for the idle jets. cb should have them. also, ask if they have the little o-rings for the idle jet holders. now would be a good time to replace them when you do the jet change. get 8 of them, i think they are the same as the ones for the idle/air mixture needle screws. piece of mind.
k ps they're open right now |
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Posts in this topic
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 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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