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April 18, 2018, 08:30 AM
1320racer
quote:
Originally posted by jimmyc: I have tried shifting on time also still did it. Msd 7 AL3 and the shifter is electric.
Greatest box msd ever made(black), same in my car and many, many others competing every week at tracks all across the country without issue.This message has been edited. Last edited by: 1320racer,
April 18, 2018, 08:37 AM
markemark
quote:
Originally posted by jimmyc: I have tried shifting on time also still did it. Msd 7 AL3 and the shifter is electric.
Is the 7AL3 the older 7230 model or the newer black 7330 model? Have the Zero chips been replaced? If 7230 model, Have you tried grounding the RET 1 – 4 terminals if not using for retard?
April 18, 2018, 08:42 AM
markemark
quote:
Originally posted by 1320racer: Greatest box msd ever made(black), same in my car and many, many others competing every week at tracks all across the country without issue.
I agree that this is a very good analog ignition model. It was re-introduced in November of 2012. Grid was on the market before this.
April 18, 2018, 08:44 AM
1320racer
April 18, 2018, 08:56 AM
rusty
if this thing is not fixed ,just for grins reverse the trigger wires.i had a friends car do the same as yours and it fixed his
honesty is the best policy,insanity is a better deffense 1.036, 6.16@ 224
April 18, 2018, 09:11 AM
1320racer
he also has not swapped the distributor yet.
April 18, 2018, 09:20 AM
Curly1
If the distributor has a pick up unhook crank trigger and try the pick up in distributor.
https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge.
Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue.
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April 18, 2018, 09:36 AM
Lenny5160
quote:
Originally posted by rusty: if this thing is not fixed ,just for grins reverse the trigger wires.i had a friends car do the same as yours and it fixed his
Good call. Don't just swap the wires and make a pass. Check timing, swap pickup wires, check timing again.
You want to run the wires in whichever configuration gives you the lowest timing advance.
With a digital MSD box, you want the configuration that gives you the highest timing advance.
Tony Leonard
April 18, 2018, 09:59 AM
jimmyc
The box in it now is the black one I’ve got a red one also. Does it with either box in it. The zero chips are new in the black box and the terminals are grounded also.
April 18, 2018, 10:00 AM
jimmyc
No pick up in the distributor
April 18, 2018, 11:42 AM
Curly1
quote:
Originally posted by jimmyc: No pick up in the distributor
With no pick up in distributor then there is not much to worry about there except cap and rotor.
I did have a locking plate on one that was loose and that allowed timing to move a little. You may want to remove rotor and see if it has any play in there.
https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge.
Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue.
4X NE2 CHAMPION. 2020 TDRA NE2 Champion
April 18, 2018, 12:18 PM
SP310G
quote:
Originally posted by 1320racer:
Where do you put the converter in this picture?
April 18, 2018, 02:33 PM
rs72z
quote:
Originally posted by SP310G: [QUOTE]Originally posted by 1320racer:
Where do you put the converter in this picture?[/QUOTe
Its the round grey thing right??
April 18, 2018, 05:03 PM
Curly1
quote:
Originally posted by Strange Magic:
quote:
Msd 7 AL3
Worst box msd ever made. You couldn't pay me to even come near one of those disasters.
I run the 7AL-2 boxes and have had three failures on them through the years. I think they are pretty good but they are not perfect. Not sure what differences are between 7AL-2 and -3.
https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge.
Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue.
4X NE2 CHAMPION. 2020 TDRA NE2 Champion
April 18, 2018, 11:22 PM
rusty
quote:
posted April 18, 2018 09:36 AM Hide Post quote: Originally posted by rusty: if this thing is not fixed ,just for grins reverse the trigger wires.i had a friends car do the same as yours and it fixed his
Good call. Don't just swap the wires and make a pass. Check timing, swap pickup wires, check timing again.
You want to run the wires in whichever configuration gives you the lowest timing advance.
With a digital MSD box, you want the configuration that gives you the highest timing advance.
Tony Leonard
i agree 100 percent,but reset timing and run car no matter which way it is.when we swapped the wires on on my friends it was supposedly correct the way it was.after swapping the wires it was fixed.
honesty is the best policy,insanity is a better deffense 1.036, 6.16@ 224
April 19, 2018, 10:02 AM
markemark
quote:
Originally posted by Lenny5160:
quote:
Originally posted by rusty: if this thing is not fixed ,just for grins reverse the trigger wires.i had a friends car do the same as yours and it fixed his
Good call. Don't just swap the wires and make a pass. Check timing, swap pickup wires, check timing again.
You want to run the wires in whichever configuration gives you the lowest timing advance.
With a digital MSD box, you want the configuration that gives you the highest timing advance.
This is where I believe this polarity problem could occur the most. On analog ignitions like 7al2 , 7al3 or MSD8, these ignitions require you to land the trigger wires on the correct M- / M+ terminals. Sometimes mistakes are made.
On the rare occasion, it's possible the sensor could be wired incorrectly. With ignitions that have the mating plug pigtail this could possibly (rare) be wired incorrect. Same goes for the cable connecting the ignition to the trigger.
Here's a PATCH CABLE I made to switch polarity of the trigger sensor quickly .
April 19, 2018, 10:12 AM
"The Bender"
Mark, I don't have a problem, but figured I'd ask for future reference. I run an 8+ with the grid controller, is this considered analog or digital, or both?
272" Spitzer 540 Chevy The Blower Shop XR1 FTI XPM Series Converter FTI Level 6 Powerglide 3.69@199 .916 60'
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April 19, 2018, 10:19 AM
Bucky
quote:
Originally posted by markemark:
quote:
Originally posted by Lenny5160:
quote:
Originally posted by rusty: if this thing is not fixed ,just for grins reverse the trigger wires.i had a friends car do the same as yours and it fixed his
Good call. Don't just swap the wires and make a pass. Check timing, swap pickup wires, check timing again.
You want to run the wires in whichever configuration gives you the lowest timing advance.
With a digital MSD box, you want the configuration that gives you the highest timing advance.
This is where I believe this polarity problem could occur the most. On analog ignitions like 7al2 , 7al3 or MSD8, these ignitions require you to land the trigger wires on the correct M- / M+ terminals. Sometimes mistakes are made.
On the rare occasion, it's possible the sensor could be wired incorrectly. With ignitions that have the mating plug pigtail this could possibly (rare) be wired incorrect. Same goes for the cable connecting the ignition to the trigger.
Here's a PATCH CABLE I made to switch polarity of the trigger sensor quickly .
Don't VR sensors' leading and falling edges look considerably different? EFI systems need to know leading or falling edges.
