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Old 05-05-2007, 10:08 PM
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Starting your blower motor? How do you?

I was just getting ready to send an IM to Royce and I figured i'd would throw this up to all of you blower motor guys.

I know, no 2 engines act the same, but what steps do you take to start your blown engine.
Last year I was chasing electrical problems (turned out to be my 2 year old Optima battery) So I never really got a "System" to starting my engine, I always ran out of battery and the voltage was dropping a lot while cranking.
Now that everything working the way it should be, heres what I do:

turn key on ( fuel pump comes on, gauge goes to 6#)

give the gas 4 full pumps

wait around 7 seconds and start cranking, after a few revolutions it sounds like it wants to start but it dont, it acts like if I gave it another pump while cranking it would start but I always heard you are not suppose to pump a blower motor while cranking incase of backfire?
Anyway I stop cranking and pump it 1 more time and then it usually starts.

Today I tried pumping it 6 times and it spun forever untill it fired, too much gas?

Oh well, im open to ideas.

Engine:
350 Chevy
Weiand 6-71
2 Holley 650 double pumpers
MSD dist & 6al box

Thanks Guys,
Duke
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Old 05-05-2007, 11:42 PM
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With the MSD your car should be firing on the first revlution. I pump mine twice then immediately hit the starter switch, it fires instantly, with a roar. It's a 383 SBC, 8-71 and two Demon 750's with a pretty healthy 4 corner pump shot, MSD 6 BTM. You're right about pumping while cranking it will sneeze the blower.

What kind of timing are you using? I'm at 20 initial and 36 to 38 total all in at 2500.
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Old 05-06-2007, 07:29 AM
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355, 6-71, 2 Edel 600s, MSD 6AL @ 22* initial, Holley elec pump at 6# - if the motor is cold, 2 pumps and crank immediately, usually fires within 2-3 revolutions - if it's warm, no pumps, crank and it fires within 1 rev.
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Old 05-07-2007, 05:25 AM
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starting your blower motor

355 chevy,4-71 blower,0ne 750 edelbrock carb. If it has been sitting overnight,one pump and it fires immediately.If it is warm just hit the key and it fires right off. if you are cranking and cranking on your blower motor you must have a tuning problem. I have been running blower motors on the street for many years,and have never had any starting problem. I do know that you dont want to start at part open throttle,qaurenteed a blower sneeze that way.
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Old 05-07-2007, 11:44 AM
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Im running 20 degrees initial timing.

Yesterday I tried just 2 pumps and it started a lot earlier, So I guess I was giving it too much gas.

Today I mocked up an old rodchester a/c solenoid , fits between the 2 carbs.
Once started I can flip a switch and hold the RPMs around 1800 untill it warms up, then flip the switch and back to normal idle.

Duke
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