S&S Super E Carb
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Stage III
Joined: Jun 2020
Posts: 3
Likes: 4
From: Memphis
S&S Super E Carb
Hey y’all. I installed a Super E Carb over the weekend on a 94 FLSTN. Stock pipes, heads, cams… no engine mods at all. Need some advice on tuning and jetting. Can’t really get her dialed in. Starts and idles and runs. Came from S&S with a .0295 intermediate and .070 main jet. I think the main may be to small? The other issue is when I turn the acceleration pump off at idle, the engine wants to quit. My AP is only about a 1/2 rotation out current. Any further I go with the pump length, the motor gets sloppy again. Any advice would be extremely appreciated.
Last edited by Andrew Collier; Jun 22, 2020 at 07:56 PM.
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,201
Likes: 3,089
From: NW AR
Turning off the accelerator pump will have no effect at all on the idle. Are you sure you're fiddling with the right screw?
Go through the tuning procedure that came with the carb. If you don't have the instructions, they are available online.
Go through the tuning procedure that came with the carb. If you don't have the instructions, they are available online.
Thread Starter
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Stage III
Joined: Jun 2020
Posts: 3
Likes: 4
From: Memphis
Positive that I have distinguished the three different adjustment screws and I have throughly made adjustments to idle speed and idle mixture at operational temperature. I agree it’s very strange how the motor acts when I shut the AP completely off.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,116
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From: Poolville
You sure you didn't have a vacuum leak somewhere... Hell I'm only running a .031 in my 96 in Evo.. I also have a Wego III AFR setup so I know it's right on..
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I sprayed the manifold a number of times and got nothing that would indicate a leak.
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Seasoned HDF Member
Joined: Mar 2010
Posts: 21,116
Likes: 7,640
From: Poolville
Good Good question cuz I just reread the whole thread, and if he's only out a half a turn on the air fuel idle mixture screw then his intermediate jet of an .0295 is too big... He needs to go down to a 28 but I think the 70 main jet should suffice for the rest