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Location of idle air bypass holes
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Author:  SGDCXCVI [ Tue Nov 27, 2012 2:26 am ]
Post subject:  Re: Location of idle air bypass holes

Thanks Ken,
I drilled as Scott posted up. I drilled a small hole to start. This weekend I should get a chance to see the result.
Where I like the idle to be when I race S/G, I just figured I was a bit to far into the transfer slot.
I guess if I have screwed it up, at worst I will need to find a new set off blades.
Cheers Colin.

Author:  Beretta [ Tue Nov 27, 2012 6:50 am ]
Post subject:  Re: Location of idle air bypass holes

Colin, On my 1250 E-85 carb I only have a 1/2 turn on the speed screws as it has T-slot showing with the blades completely closed. So I just have the speed screws set open just so it don't stick.
I had one hole drilled in the plates but now have 2 holes in each plate and that works a lot better as far as Idle is concerned. Also with a smaller hole I was able to go down on the size of the T-slot and also size of the discharge nozzle..Just keep drilling till you get the idle rpm you want...
Image

Author:  SGDCXCVI [ Tue Nov 27, 2012 4:48 pm ]
Post subject:  Re: Location of idle air bypass holes

Barry,
l only drilled .062" to start. Where did you end up with your t/slot?
I'm at .052" at the moment.
Cheers Colin

Author:  Beretta [ Tue Nov 27, 2012 8:15 pm ]
Post subject:  Re: Location of idle air bypass holes

Colin, I am at .081 but running E-85 in a 540...I started out with a .085 and droped it down and also filed some of the cam on the acc pump and also dropped the nozzle from .045 to .042 and I am going to drop the nozzle down again may be .040 or smaller...
When you get the T-slot and pump shot right it will pick up your short times =;

Author:  Beretta [ Tue Nov 27, 2012 8:17 pm ]
Post subject:  Re: Location of idle air bypass holes

You may have seen this but here is what I did with the acc pump cam..
You will find out when you get it correct you won't need all that pump shot.
Image

Author:  74 firebird461 [ Wed Nov 28, 2012 10:29 pm ]
Post subject:  Re: Location of idle air bypass holes

Beretta wrote:
You may have seen this but here is what I did with the acc pump cam..
You will find out when you get it correct you won't need all that pump shot.
Image


Wow, you took alot off that cam barry. i run those same cam's with a .035 shooter .. think maybe i may try that too.

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