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Car is leans on the top end goes 14.5. Seems to be good at idle and part throttle 10.5-11.5,car is running E85. Now the problem is I am out of jet its got 99 squared in it. I would like to play with the air bleeds, how many sizes should I start with? I saw another post with a 10 # swing is that what it takes or will a smaller number do it? These are the opposite of the jets small is richer and larger is leaner. I have 3 jets to play with if I only change the high speed it shouldn't change the a/f for the others right.

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I would look at 6 sizes smaller(smaller is less air
so it pulls more fuel though the jet)... if I remember
right 1 bleed size equals 2 jet sizes(might be 3)

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Car is leans on the top end goes 14.5. Seems to be good at idle and part throttle 10.5-11.5,car is running E85. Now the problem is I am out of jet its got 99 squared in it. I would like to play with the air bleeds, how many sizes should I start with? I saw another post with a 10 # swing is that what it takes or will a smaller number do it? These are the opposite of the jets small is richer and larger is leaner. I have 3 jets to play with if I only change the high speed it shouldn't change the a/f for the others right.

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I would look at 6 sizes smaller(smaller is less air
so it pulls more fuel though the jet)... if I remember
right 1 bleed size equals 2 jet sizes(might be 3)

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I beleive the metering blocks need to be changed too.

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mr p, if i'm running say an 88 gas jet, what would i need to run for e85

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I dont know

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Car is leans on the top end goes 14.5. Seems to be good at idle and part throttle 10.5-11.5,car is running E85. Now the problem is I am out of jet its got 99 squared in it. I would like to play with the air bleeds, how many sizes should I start with? I saw another post with a 10 # swing is that what it takes or will a smaller number do it? These are the opposite of the jets small is richer and larger is leaner. I have 3 jets to play with if I only change the high speed it shouldn't change the a/f for the others right.

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I would look at 6 sizes smaller(smaller is less air
so it pulls more fuel though the jet)... if I remember
right 1 bleed size equals 2 jet sizes(might be 3)

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And change the jets to a smaller set so I can tune it better? Or just change the bleed?

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You should be able to jet down also

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1967DartGT,
What size air bleeds are in the high speed (HS) circuit now?
What size booster is in it?
What venturi and butterfly sizes?

Depending, 0.025-0.028" HS air bleed might be reasonable. But that depends a lot on the rest of the metering circuits. If that doesn't richen it up enough, consider a booster size change.

Changing the air bleed will change both the total A/F mixture and change the point the HS circuit comes into play. So I would leave the 99 jets in for now and just make the air bleed change for starting point. See what the effect on A/F and ET/mph is. Then adjust from there.

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My 950 e85 carb came with size 128 main jets.
air bleeds 31.
idle air bleeds 52.
Power valve plugged.

Dont know if this helps any cause when i got the car to go fair, i was no where near the seeting it came with.

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My Quick fuel Q-950-E85 carb came with 88 Primary jets, 96 secondary jets and 63 idle air bleeds, 28 high speed bleeds and a 4.5 power valve. I have been running the carb as received with consistent ETs. I’m crossing the line at 6,000 RPM with a.83 Lambda reading.
Since all we can get down here in East Tennessee is E-70, I tried mixing five gallons of E-70 with five gallons of racing methanol. Test indicates it is 15 % gas and 85 % alcohol, EM-85. I tried running some of the mix last night and picked up .05 on back to back runs. The problem is now my Lambda reading is .97, way lean, probably why it picked up. I jetted up to 90 Primary and 98 secondary this morning and reset the idle mixture. I’m going back out to night to see how it responds. I may have to jet up some more. This is on a 496 wedge running 6.61 1/8th mile on E-85.
I’m thinking smaller high speed bleeds and smaller main jets will get you there. It’s worth trying.

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Bad,
From what I have found, the timing of the HSAB will depend on the carb.
Once you get your LM2 installed and get a saved run so that you have a chart to compare too, then add 2-4 jets on the primary side and then made a another test run. Then compare the two charts and compare the charts to see at what rpm level your A/F ratio moves richer. Then you will know when your mains start in and then you can ajdust the timing with the HSAB's.

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or you could put it in gear and aply the hand brake then increase rpms and look in the carb for fuel from the boosters.
Im sure it dont work on every aplication but it does on mine.

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