Re: school me on air bleeds
[Re: dbran451]
#2392072
10/23/17 10:27 PM
10/23/17 10:27 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,719
Bend,OR USA
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Try it and see Let us, me, know your results please I have a Holley 1150 converted to E85 by A.J. at Bob George racing that I'm racing with, I haven't tried changing any of the bleeds yet Mine has never miss do to fuel issues, yet I did find out it, E85 fuel, doesn't like colder spark plugs
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: school me on air bleeds
[Re: dbran451]
#2392073
10/23/17 10:29 PM
10/23/17 10:29 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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If the carb is designed for E85 but it has a fuel curve issue then going smaller on the main air bleed will add fuel at WOT. Fuel curve engineering is best done on a dyno with wide bands hooked up.......
the carb has a quick fuel conversion with the green metering blocks I realize the best way is to use a dyno but that isn't in my future I'm just trying to get a feel for how much air bleeds will change the fuel curve [/quote]are those metering block's for the dominator or are they for the 4150 series, they look pretty much the same (green)and will interchange, but are not calibrated the same.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: school me on air bleeds
[Re: Dave Hall]
#2392231
10/24/17 10:37 AM
10/24/17 10:37 AM
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Joined: Nov 2003
Posts: 654 ohio
dbran451
OP
mopar
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OP
mopar
Joined: Nov 2003
Posts: 654
ohio
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Check the plug gap! I went to that coil and gapped my plugs to the usual MSD .040 and that coil knocked that crap to well over .060. MSD recommends .020 with that coil, I wouldn't go over .025. the plugs were gaped at .040 but why would you close the gap when old coil fires at 140ma and the new one fires at 2a almost 2000 times stronger
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Re: school me on air bleeds
[Re: dbran451]
#2392252
10/24/17 11:47 AM
10/24/17 11:47 AM
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Joined: May 2011
Posts: 4,492 northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,492
northern,Ohio,USA
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I was only able to change the a/f by 2pts going from a 60 to a 25 just to see what it would do.I needed to change the feeds to get real change but this was a 3 circuit.There are other things to test like putting a tube on the bowl vents,check fuel flow at top rpm...
Last edited by Clanton; 10/24/17 12:17 PM.
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Re: school me on air bleeds
[Re: dbran451]
#2392275
10/24/17 12:12 PM
10/24/17 12:12 PM
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Joined: Mar 2007
Posts: 69 Palm City, FL
Dadodgekid
member
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member
Joined: Mar 2007
Posts: 69
Palm City, FL
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Friend of mine had the same problem, didnt chnage much but went too a digital 7 and the HVC 2 coil, he gapped his plugs too .040 and it starting breaking up at high RPM, we checked alot of little stuff... The Ign box, timing, pickup in the dizzy, turned out, when we gapped the plugs to .030 the issue went away. Only thing we could comeup with is that the larger bore size, 4.505, it was alot of windage in the combustion chamber blowing out the spark at 6500RPM plus. Hope this helps!
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Re: school me on air bleeds
[Re: dbran451]
#2392336
10/24/17 02:04 PM
10/24/17 02:04 PM
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Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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The smaller hi speed will delay the initial fuel down low and through the top end(richer) and a bigger hi speed will activate sooner (richer) and taper off up top (leaner). I had a scenario on my carb where it was stupid lean down low like 16-17 afr's and rich up top like in the 11's w/ .028's so I put .030's in and the curve teeter tottered rich down low and leaner up top just like that w/no other changes......EVERYTHING goes through the hi speed bleeds and they are active early in the run not just up top.............
Last edited by Thumperdart; 10/24/17 02:04 PM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: school me on air bleeds
[Re: dbran451]
#2392339
10/24/17 02:15 PM
10/24/17 02:15 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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" school me on air bleeds" From what I can figure out, the class lecture is only about 15 minutes long to cover the theory, but the lab work to test the theory vs reality can take years.
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