[snowball]

i have big&ugly on 16/71 with e-98 if i run idle up to 2000rpm surge is almost gone but i would like my car to idle 1500-1800 if possible
i have tried adjusting barrel valve
adjusting gap on butterflies
removing plugs on the injector
added washers to change spring pressure on idle return
nothing seems to change it much other than increasing the idle looking for some new ideas

 

[Kevin Zaske]

Is it a clutch or automatic? Automatic is a little more challenging. Did you leak the barrel valve? Easy way to do it is pull the fuel shut off slowly. You will find you are probably rich on the barrel valve adjustment.

 

[WJ Birmingham]

Lean it out or turn the idle up...

Idle poppet pressure should be set around 6-7 PSI.

If memory serves correct, butterfly gap on the bigger injectors should be around .009-.012"

 

[Horndog]

Blower surging is cool !!!
Don't change a thang !!!

 

[unknown_element]

Ive been told if you add more fuel it will go away. Atleast with a carb setup.

 

[gt_diesel]

A high idle is about the only thing that will make it go away

 

[sick71]

Love the sound of a blower surging!! Why change it??

 

[snowball]

power glide 35%leak when i lean out the barrel valve idle goes up with it so than i close gap on butterflies goes right back to surging

Is it a clutch or automatic? Automatic is a little more challenging. Did you leak the barrel valve? Easy way to do it is pull the fuel shut off slowly. You will find you are probably rich on the barrel valve adjustment.

 

[snowball]

i have tried the butterflies all over in this range .003-.010 yes it moves the idle and problem goes away but its idleing @1900-2000rpm but i would **** to be a little lower
poppet pressure is in that range

Lean it out or turn the idle up...

Idle poppet pressure should be set around 6-7 PSI.

If memory serves correct, butterfly gap on the bigger injectors should be around .009-.012"

 

[snowball]

me to but it takes 2 feet to run the brake pedal

Love the sound of a blower surging!! Why change it??

 

[outlaw68]

Hard to get one to idle down and not surge. Have you played with timing yet? I like the surge, but understand how tough it is to drive when surging...

 

[snowball]

no i have not moved the timing i am goint to try and get the gap on the butterflies less than .003 not sure if it will help

 

[redwhite]

The only way to get rid of it is by opening the gap in the blades. Surge is caused by the vacum in the hat cycling up and down due to a lack of flow past the throttle blades. Open up your blades some then readjust your leakdown.

.

 

[WJ Birmingham]

no i have not moved the timing i am goint to try and get the gap on the butterflies less than .003 not sure if it will help

So whats it timed at?

 

[snowball]

33 locked out
isnt opening blades is gonna raise idle than its gonna want more fuel and makeing it surge worse

So whats it timed at?

 

[WJ Birmingham]

33 locked out
isnt opening blades is gonna raise idle than its gonna want more fuel and makeing it surge worse

Probably about 4-5 degrees too much timing. Where is the annealing mark on the plug ground strap?

 

[snowball]

i havnt been down the track yet

 

[WJ Birmingham]

i havnt been down the track yet

Pull it down to 28-29 degrees, gap the throttle blades around .009, and lean down the barrel valve. I bet you see your idle speed drop a bunch, and the surge lesson as well.

 

[snowball]

i will give that a try on wed out of fuel right now

 

[ts5089]

i will give that a try on wed out of fuel right now

What, you can't go get some at the pump???? Shawn are you going to run the E-85 or E-98?
MIKE