shimming the needle

[jinks]

I have some carb needle shim washers that I use every now and then on other projects. Question- can I slide 1 thin shim under the needle and get away with it and not cause any other problems ? I am running stock jets. Will it help on top-end pull, or is it just a bunch of trouble ?

 

[tugla]

If it needed based on your elevation then yes can be a fine tuning tool. You have to try it....get a plug read and see...

 

[DMAN999]

^ And it also depends on what exhaust you have on your Vmax.

 

[Traumahawk]

^ And it also depends on what exhaust you have on your Vmax.

+1....if its stock exhaust...or even slipons, its not a good idea.

 

[blaxmax]

I have some carb needle shim washers that I use every now and then on other projects. Question- can I slide 1 thin shim under the needle and get away with it and not cause any other problems ? I am running stock jets. Will it help on top-end pull, or is it just a bunch of trouble ?

Top end is going to be mostly main jet. The shim will be the needle setting at a higher that stock position therefor richer. I have a stock pipe on one of mine with a shim under the needle and larger than stock main jets but my altitude is below sea level.

 

[jinks]

thank you for all your in-put.