Drag Racing Discussions > Front Engine Dragsters
Correct starting & shut off procedure of a blower motor
dreracecar:
Just before starting, should put a long ratchet in the top pulley a back the motor down to clear the cylinders just in case. Brings up another point, if you are using a block starter and not a blower starter, you should at least have the blower starter mount and drive dog installed. When the block starter fails, there is a chance to borrow the remote blower starter and fire the motor
arush:
Appreciate your response Crider.
Bruce....Good point on the backing the motor down and installing the drive dog.
Draw 3D:
I disagree with some of the posts, I don't fire my motor without oil pressure buildup and I don't turn on the mag if the motor isn't spinning, good way to backfire the motor and hurt the blower.
rooman:
--- Quote from: Draw 3D on February 27, 2017, 11:33:25 AM ---I disagree with some of the posts, I don't fire my motor without oil pressure buildup and I don't turn on the mag if the motor isn't spinning, good way to backfire the motor and hurt the blower.
--- End quote ---
??????? As far as I can see everyone suggested just that--spin it with the mag off to get pressure and then spin it and flip the switch.
Personally, I never bother with the mag switch on shut down, just shut the fuel off and once it stops, ground the mag. In the NT/F car the motor usually quit on its own when I got off the right pedal and cut the air supply off. Once the chutes were out I would shut the fuel off and quite often I did not ground the mag until I made the turnout.
Roo
Draw 3D:
--- Quote from: rooman on February 27, 2017, 02:38:22 PM ---
--- Quote from: Draw 3D on February 27, 2017, 11:33:25 AM ---I disagree with some of the posts, I don't fire my motor without oil pressure buildup and I don't turn on the mag if the motor isn't spinning, good way to backfire the motor and hurt the blower.
--- End quote ---
??? ??? ? As far as I can see everyone suggested just that--spin it with the mag off to get pressure and then spin it and flip the switch.
--- End quote ---
Here:
--- Quote from: coupemerc on February 26, 2017, 12:16:29 PM ---I recommend doing things differently than you listed. Check for oil pressure in the pits with the spark plugs out of it. Leave the mag off and the fuel shut off and crank the motor. That way you will not kill your batteries.
--- End quote ---
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