Timing help needed
Not to get off track but does everyone agree that if you are under 1.5 turns on the idle mix screws to go with .010 bigger bleeds and if you are over 2 to go .010 smaller?
It's not off track. Someone smarter than me once posted about the time it takes for the fuel to clean up is time lost in establishing good combustion. Point was that getting the idle and off idle cleaned up is definately relavant to the runs.
To add to what Mderoy said.
Important thing is that the idle mix screws noticible change the idle characteristics when turned.
The t-slot under the throttle is restricted but at least as important is the slot above the throttle acts as another bleed.
My experience has been that a test for too large of idle bleeds is very gentle low speed loads. Go up a small hill at 30 mph. If it can't do that, it probably needs smaller IABs.
If you can't do that test (track only car) then prob have to just be very systematic with experimentation.
First do a very slow increase in rpm from idle in neutral. The idea is minimize any pump shot. If there is any hesitation, then it certainly won't like it under load.
Try a slight increase in IFR if you can. If thats not within easy possibility, try smaller primary IABs. Or wires in the IABs to reduce the effective area.
Of course its best to test one change at a time but adjust the idle mix screws if need be for stronger idle.
Always remember idle in neutral will be happy when leaner than it should be for handling even a small load.
