It has taken me way too long but I finally have the new 540 (4.500 x 4.250) running in my KOS Demon. The car had a KB/B1 499 (4.530 x 3.850) that had huge ports and a pretty big cam with 15-1 CR. The 540 has 440-1 heads CNC'd and a R2 cam with 1.6 rockers and 14-1 CR. I have the same Dominator carb on the 540 that was on the 499 and for now using the same C-16 fuel.
Why won't the engine idle with the carb set the same as it was on the 499? Is it possibly the stronger vacuum pull from the larger disp requiring more air? I have had to open the idle stop quite a bit to get it close to idling. Timing? Right now I have it at 34* fixed from the crank trigger. The way it starts it does not seem to be too far advanced.
Haven't gotten it to the muffler shop yet and with open 3 1/2" collectors it sounds like a beast.
Why won't the engine idle with the carb set the same as it was on the 499? Is it possibly the stronger vacuum pull from the larger disp requiring more air? I have had to open the idle stop quite a bit to get it close to idling. Timing? Right now I have it at 34* fixed from the crank trigger. The way it starts it does not seem to be too far advanced.
Haven't gotten it to the muffler shop yet and with open 3 1/2" collectors it sounds like a beast.
