Top Fuel Warmup - Brainerd, MN

i been to a lot of drag races and at 47 thats when they switch it over to just fuel then after that they switch it to nitro methane

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Thanks for clearing that up.

They used to have two fuel pumps/two controls. Usual set up now is one control/two pumps. Warming up and burning out they set fuel pressure to around 50 PSI. On the run it's around 600PSI. At 0:47 he's setting the pump valve full open, as for the launch and run. The idle RPM drops with full fuel pressure, as the fuel/air mix changes. Some people I know are now using 120 gallon pumps, measured at 8000 RPM. Some of that is always sent back to the tank, and the return flow is altered on the run.

Although I cannot say for sure exactly what happens at :47 I am certain that these cars do the burnout on one fuel pump,fuel cars have two, therefore I am cetrain that the fuel is not set to full all the time. My conclusion was based on the fact that you get a similar effect when the second fuel pump turns on after the burnout procedure just prior to lighting the second bulb at the start. Also you can see the Jon pull a lever where the fuel pump is located. Can anyone back me?

at 47 he is just setting the throttle to idle as you can hear the revs drop. the fuel pump is set at full at all times other wise there would b danger of over leaning the engine.

AHH ok, thanks that makes alot of sense now that you explained it. Very awesome video, really makes you respect these awesome machines! 5 stars.

at :47. Jon, I think it is, turns the fuel pump to full. I am not sure of the exact numbers, I've read that at full pumping they push between 50 and 70 gallons per minute. So much fuel that it blows out of the engine unburned at idle and muffles the sound. Very cool!

what does he do at like :47? he switches something over?

LOL!

AGREED

i thought there about to flip the as with the guy right by the headers lol it would blow his damn pants of lol it happen to

ahhhh the smell of nitromethane in the morning

The NHRA seem to think 90% will allow the motors to make parts last longer therefore making the sport cheaper for the teams. I reckon the teams will push the motors just as hard and go for bigger horsepower and lower ET's. Time will tell but get ready for some big oildowns and maybe even dust off those ear defenders.. Awesome warm-up video by the way!

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I WAS THERE!!