Idle air screws

Qft 1250, where r u guys setting your level in the sight glass? And with .003 on the main bearing and 21/2 on the rod, what weight oil and what kind? I got access to some Brad Penn for 6 bucks a qt.
Thanks
Th

Qft 1250, where r u guys setting your level in the sight glass? And with .003 on the main bearing and 21/2 on the rod, what weight oil and what kind? I got access to some Brad Penn for 6 bucks a qt.
Thanks
Th

Never use sight glass. Use brass plugs. At idle set the float so that the fuel will trickle down the side of the carb if you bump the car. Otherwise no trickle...

tconnection wrote:Qft 1250, where r u guys setting your level in the sight glass?
Thanks
Th

Experiment with setting it a bit higher and lower, (as long as the is no sign of booster dripping), until the vehicle runs the best.
Then mark it and set THAT combination there, all the time.

Randy's advice is best.. I typically didn't have the luxury of days of testing. It was carb rebuild and bolt on... So the quickest way to establish a "decent" tune was to use a preset fuel level, and then tune around it. The fuel level in the bowl is the "fuel pressure" for the various circuits for the carb. It is another "tune-able" option. One size does not fit all. Instead of pulling jets and playing with air bleeds, the simple twist of the float setting can net gains or losses.

Ensure you don't have fuel siphon at idle through the booster. Ensure your not creating a huge fuel slosh issue up vent tubes... but the beauty and simplicity of the carb, is the detriment that you have to play with it ALOT to get everything "perfect". And then perfect is only really perfect for that combination, AND atmospheric condition.......

I lowered my floats down. The fuel is only showing about an 1/8 or so above the bottom of the sight glass. So far when I rev on it it's alot more clear. I gonna see about getting a video running it down the road tom and post it in my build section.
Thanks

tconnection wrote:I lowered my floats down. The fuel is only showing about an 1/8 or so above the bottom of the sight glass. So far when I rev on it it's alot more clear. I gonna see about getting a video running it down the road tom and post it in my build section.
Thanks

We need videos of it on the back wheels @ about 45*

tconnection wrote:I lowered my floats down. The fuel is only showing about an 1/8 or so above the bottom of the sight glass. So far when I rev on it it's alot more clear. I gonna see about getting a video running it down the road tom and post it in my build section.
Thanks

Free reving it will tell you little ... driving it and racing it will make a difference.