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when is locking out a dizzy required?
#1457016
06/23/13 09:00 AM
06/23/13 09:00 AM
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Joined: Oct 2003
Posts: 614 ont,canada
mopartuner
OP
mopar
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OP
mopar
Joined: Oct 2003
Posts: 614
ont,canada
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Just wanted to know when you need to do this?What conditions?
410 pump gas solis flat tappet cam 10.95 so far
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Re: when is locking out a dizzy required?
[Re: mopartuner]
#1457017
06/23/13 09:23 AM
06/23/13 09:23 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Just wanted to know when you need to do this?What conditions?
You dont need to if it doesnt give you any problems. some with big cams do it for the ease of tuning... if its a street/strip car I like to run advance... I have a locked out one in my Rampage just for the dyno.. now that I know where it likes max timing I can curve my advance one.... but its never required
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Re: when is locking out a dizzy required?
[Re: mopartuner]
#1457018
06/23/13 10:34 AM
06/23/13 10:34 AM
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Joined: Jul 2010
Posts: 1,491 Oologah, Oklahoma
Big Squeeze
pro stock
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pro stock
Joined: Jul 2010
Posts: 1,491
Oologah, Oklahoma
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Quote:
Just wanted to know when you need to do this?What conditions?
The answer is; Whenever the motor wants it....
Like mentioned, typically the bigger the cam and the lower the compression the more timing the motor will want....
The way to figure it out is to set the idle rpm at whatever it wants to idle good at, then add two degrees timing....if the idle rpm goes up up, your motor wants that extra timing...now lower the rpm back to where it was when you started....keep adding two degrees timing and resetting idle rpm until you don't see any good gains....then run it long enough to get fully warmed up, shut it off and see if it cranks and starts good...if so, that's what it wants for initial timing....if it does crank hard, back the timing up two degrees at a time until it starts good and that's what it wants for initial timing...
Some motors want 10* at idle, some want 30-35*....you just have to figure it out...
If you can't handle the truth, you're living a lie.......
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Re: when is locking out a dizzy required?
[Re: tubtar]
#1457020
06/23/13 11:56 AM
06/23/13 11:56 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
A loose enough converter that you would be launching at a point where the advance is all in anyway would be one.....same for a stick shift car. Advance helps starting and stop and go driveablity , so any time you can take either condition out of the equation I guess. I have done both not providing power to the ignition until the motor was spinning and a multi stage retard box for starting and both took care of the starting issue.
All my conv's are 5000 plus and I run advance on two of those engines... just have it come in at about 1200 - 1500 rpms and be full at 1800.. easier on the start up and killing the engine
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Re: when is locking out a dizzy required?
[Re: mopartuner]
#1457021
06/24/13 12:43 PM
06/24/13 12:43 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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When your mechanic doesn't understand what it does, otherwise not.
Boffin Emeritus
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