Re: QT50 and SHA slide tuning

Graham Motzing /
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As I said in my previous post, the slide mods are changing how much air goes past the emulsion tube or bypass it.

Bernoulli's law says that the faster air moves, the lower pressure it has. The lower the pressure the more fuel gets pulled in from the emulsion tube. There are 3 small holes in the tube that give you idle, midrange and full throttle jetting.

If you want to make the carb suck up less fuel (leaner) figure out how to make the air going past the emulsion tube go slower. Adding bypass holes is one way, making the cutaway angle steeper is another way.

Since you're tuning everything with one jet, you also want to make sure that you are giving it as much advantage to be rich at full throttle, having a little air filter restriction means more pressure drop at higher rpm which means you can run a smaller main jet and be leaner at idle.

Eventually you get tuned to a point where the progression of the fuel delivery is too extreme for a Sha. Big porting and big pipe need a lot more fuel at wot and are much more load sensitive so you end up going to a multi circuit carb... Like the OEM one you removed, lol.

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Subject Written By Posted
  QT50 and SHA slide tuningTopic by: Real first name Real last name Real first name Real last name 04/24/22 01:53AM
  Re: QT50 and SHA slide tuningRe: Graham Motzing Graham Motzing 04/24/22 07:40AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/24/22 10:12AM
  Re: QT50 and SHA slide tuningRe: Dirty30 Dillon Dirty30 Dillon 04/24/22 10:47AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/24/22 12:39PM
  Re: QT50 and SHA slide tuningRe: LSLB RXb LSLB RXb 04/24/22 01:38PM
  Re: QT50 and SHA slide tuningRe: Tom Boyd Tom Boyd 04/24/22 03:12PM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 11:10AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 12:15AM
  Re: QT50 and SHA slide tuningRe: Jack Rutherford Jack Rutherford 04/24/22 11:22PM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 12:29AM
  Re: QT50 and SHA slide tuningRe: LSLB RXb LSLB RXb 04/25/22 06:49AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 12:19PM
  Re: QT50 and SHA slide tuningRe: Jack Rutherford Jack Rutherford 04/24/22 09:07AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/24/22 10:00AM
  Re: QT50 and SHA slide tuningRe: Jack Rutherford Jack Rutherford 04/24/22 10:35AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/24/22 11:52AM
  Re: QT50 and SHA slide tuningRe: pat splat pat splat 04/24/22 12:17PM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/24/22 12:49PM
  Re: QT50 and SHA slide tuningRe: Jay Rivett Jay Rivett 04/25/22 10:31AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 11:02AM
  Re: QT50 and SHA slide tuningRe: Jay Rivett Jay Rivett 04/26/22 10:36AM
  Re: QT50 and SHA slide tuningRe: Jay Rivett Jay Rivett 04/26/22 10:40AM
  Re: QT50 and SHA slide tuningRe: Tom Boyd Tom Boyd 04/26/22 04:27PM
  Re: QT50 and SHA slide tuningRe: Jay Rivett Jay Rivett 04/27/22 10:14AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/27/22 11:23AM
  Re: QT50 and SHA slide tuningRe: Jay Rivett Jay Rivett 04/28/22 10:08AM
  Re: QT50 and SHA slide tuningRe: Graham Motzing Graham Motzing 04/25/22 11:17AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 12:48PM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 01:22PM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 03:27PM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 04:24PM
  Re: QT50 and SHA slide tuningRe: Tom Boyd Tom Boyd 04/25/22 05:23PM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/25/22 06:01PM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/27/22 11:38AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/27/22 11:23PM
  Re: QT50 and SHA slide tuningRe: LSLB RXb LSLB RXb 04/27/22 11:31PM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/28/22 12:06AM
  Re: QT50 and SHA slide tuningRe: LSLB RXb LSLB RXb 04/28/22 07:08AM
  Re: QT50 and SHA slide tuningRe: Real first name Real last name Real first name Real last name 04/30/22 10:27AM
  Re: QT50 and SHA slide tuningRe: Jay Rivett Jay Rivett 04/30/22 12:24PM

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