Clockwork Racing modded B5. Powerful, smooth, and the best mileage and power under the sun, out of any engine I've owned or raced against...my last tank went over 16 minutes ( I'm a little rusty and did manage to crash alot, the track was dry and dusty, and I spun out alot, but drove it hard to see how runtimes would be) I consistently get 15 minutes tanks with this mill and CRE Fuel, when my tune is spot-on.

It'll idle all day long, and usually starts with a quick blip, and is a happy tuner.