Originally posted by Ron Ciglar:
quote:
Originally posted by ActionRacingPhotos:
Motor definitely wasn't cold and had no issues down into the 40s at the same race. Really sucked having it show up in the final round.
Heating the fuel could be a possibility. Fuel tank is behind the seat and my fuel filter sits directly below the radiator.
I've had that happen a time or two and Al's right, it was after a nighttime temp drop with much cooler/denser air and in my case would create a leaner barrel valve mixture, my solution was to forget about the old "I hardly use any fuel when I set my barrel valve real lean" statement and make sure my BV was biased rich (or with a carb turning the idle mixture screws out a tad more) about 1 degree of increased engine temp with car in gear about every 30-45 seconds with fan off, raise the staged "on the enhancer" rpm to 2200 (I'd bump it on before staging and work the throttle to get in and mat it after I let go) and extend the TB/Enhancer release time to 1.1 second (which makes sure the converter reaches the same stall every time) instead of the programmed .8 (timer will say 11.11) that Digital Delay boxes come with.
