how much nitro is needed to make the fire in the pipes?

[dave]

RE: Nitro flames at idle. Its the reverse of what you think. I can get two foot flames at idle when I lean the barrel valve. We run our car on 90% and it won't show flames until about 200' due to being rich at idle and at the hit of the throttle. Having a cackle car set up for flames and running that car in competition are two different animals.
Dave Hough