Hooking up my ignition ...

[Brooks James]

Here's the plan

Mopar HyFire 7500 rpm box, with accompanying new harness

Accel Super Coil using ballast resistor supplied

On an MP bronze shaft distributor

 

[rumblefish360]

What does the bronze shaft have to do with ignition?

 

[Brooks James]

What does the bronze shaft have to do with ignition?

There was argument a while back that a true mp dizzy had a bronze shaft, others said that was hog wash.
I mentioned that as I believe the bronze shaft will wear less, thus keeping timing more accurate, longer

 

[RustyRatRod]

There was argument a while back that a true mp dizzy had a bronze shaft, others said that was hog wash.
I mentioned that as I believe the bronze shaft will wear less, thus keeping timing more accurate, longer

Unless you are running a billet solid roller camshaft, the bronze gear will wear out in short order.

 

[Brooks James]

Unless you are running a billet solid roller camshaft, the bronze gear will wear out in short order.

I'm not so sure the gear is bronze,
I'll be pulling it next week

 

[RustyRatRod]

I'm not so sure the gear is bronze,
I'll be pulling it next week

No one makes a bronze intermediate SHAFT. When talking about bronze, it's the GEAR that's made, not the shaft.

 

[halifaxhops]

Some of the early Mallory style dist had a plating on them that was a gold color. Has to be steel or it will twist eventually and sheer. Bronze is soft thats why they use it on the oil pump/dist shaft gears.

 

[Brooks James]

Ok, great info
I was going to run an MSD6AL, but I'm not going to spend the money for a new one
I decided if I had a problem on the road, the good ole electronic dizzy was best overall, for getting parts and dependability

 

[MadScientistMat]

I have seen a four cylinder Porsche 944 lose 5 hp on a chassis dyno when swapping a 30 year old Bosch coil for an Accel Super Stock unit. I'd consider the Bosch coil - they used the same part for late '80s Porsche 944 and BMW 325 applications - for a build that needs a can type coil. The downsides are that it needs a different coil wire and I'm not sure how to run it with a ballast resistor. You could sidestep the ballast resistor question with an HEI module or other ignition with active dwell control.

Note that this was the can type coil; I'm not sure how the square top one performs. But I have also dealt with customer problems brought about by Accel's stock replacement OE replacement coils as well.

 

[CFD244]

No one makes a bronze intermediate SHAFT. When talking about bronze, it's the GEAR that's made, not the shaft.

I think he means the distributor shaft, not the intermediate shaft. I think the bronze shaft means that it is a Mallory or Accel ??????manufactured piece.

 

[Brooks James]

I think he means the distributor shaft, not the intermediate shaft. I think the bronze shaft means that it is a Mallory or Accel ??????manufactured piece.

Yes, shaft

 

[Brooks James]

I've decided to keep the MSD6AL as a spare in the trunk with pigtails for quick installation, when we go cross country, or go to the track

 

[RustyRatRod]

I think he means the distributor shaft, not the intermediate shaft. I think the bronze shaft means that it is a Mallory or Accel ??????manufactured piece.

The shaft in the distributor housing? None of them are made of bronze either.

 

[CFD244]

The shaft in the distributor housing? None of them are made of bronze either.

I'm not sure if it is actually solid bronze or some sort of an alloy. I have one, and that is how it is identified. (file pic)

 

[RustyRatRod]

I'm not sure if it is actually solid bronze or some sort of an alloy. I have one, and that is how it is identified. (file pic)

View attachment 1716231215

Trust me. It ain't bronze. Put a magnet on it.

 

[CFD244]

Trust me. It ain't bronze. Put a magnet on it.

Ok.....Bronze colour

 

[RustyRatRod]

Ok.....Bronze colour

Now you're talkin. It might even be bronze plated.....for whatever reason, but it ain't bronze.

 

[Bewy]

The only thing Super about the Accel super coil is the price. You were paying extra for a pretty ordinary coil dressed up to look impressive.
The Hyfire is a CD ign system. To get the best out of it, you should use an E core coil & better still, an E core coil designed for CD such as the MSD 8252.

 

[Newbomb Turk]

The only thing Super about the Accel super coil is the price. You were paying extra for a pretty ordinary coil dressed up to look impressive.
The Hyfire is a CD ign system. To get the best out of it, you should use an E core coil & better still, an E core coil designed for CD such as the MSD 8252.

He doesn’t have a HyFire that I can see.

 

[Carnut68]

I think he's talking about the Hi-Rev 7500 ignition box.

 

[Bewy]

Ooops, my bad.

 

[Brooks James]

I think he's talking about the Hi-Rev 7500 ignition box.

Yes, correct

 

[CFD244]

The only thing Super about the Accel super coil is the price. You were paying extra for a pretty ordinary coil dressed up to look impressive.
The Hyfire is a CD ign system. To get the best out of it, you should use an E core coil & better still, an E core coil designed for CD such as the MSD 8252.

I had the same conversation with a fellow I know that builds engines........He said it's all window dressing.