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Author Topic: Switch to Mag?  (Read 19770 times)

Offline FEDNV

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Switch to Mag?
« on: July 06, 2014, 08:18:39 AM »
So after converting to alcohol injection on my car it still is running the MSD system (2 step, 6al box coil and billet distributor).  There is a Mallory SuperMag III for sale local with a coil for $350.  I have never run a Mag before so would I need to buy anything else and what performance gains or other reasons to switch to a mag?
thanks
Scott
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Offline Totally T

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Re: Switch to Mag?
« Reply #1 on: July 06, 2014, 11:44:14 AM »
If you are using a two step/transbrake you will have to buy a throttle controller for launching.
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Troy Wilson
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dreracecar

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Re: Switch to Mag?
« Reply #2 on: July 06, 2014, 11:58:14 AM »
All you need is a buzz box and a mag specific timing light (adj conventional ie snap-on are not recomended) and make sure you use solid core wires. The spark  from the mag is better for the fuel but no real big power advantage, anything you do get is from not having to carry all that extra battery weight to run the msd.
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Offline George

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Re: Switch to Mag?
« Reply #3 on: July 06, 2014, 12:18:35 PM »
I didn't see any performance difference between an MSD Digital 8+ and MSD 12lt mag. Two area engine builders tell me I would make more power with the digital system because of the wider plug gap. Maybe on a dyno?

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Offline FEDNV

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Re: Switch to Mag?
« Reply #4 on: July 06, 2014, 01:18:45 PM »
Thanks for the responses guys.  Everything seems to be working good on my car now but I see a lot of Magneto's on injected cars so I was seeing if it would be worth the money to switch over and if there were any real benefits to it.
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Offline JrFuel Hayden

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Re: Switch to Mag?
« Reply #5 on: July 06, 2014, 02:36:10 PM »
George, what compression ratio are you running and what fuel flow ?
 I find with the more combustion pressure you run the more ign you need.
If you are running 13 to 1 compression, and under 2 gpm fuel flow you may not need a mag.
As far as the weight of an on-board battery to power your dist ign, you could go with lighter battery, I sell a 12 volt, 550 amp battery that weights under 5 lbs. And MSD said a 7al only needs a 12-15 amp battery, which I can get that weighs 1 lb.
I'm sure Spud can fill-in some details, on mag vs dist ign systems.

Jon, Hayden Wheels, 800-624-3803
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Jon C. Hansen

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Offline Supercat

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Re: Switch to Mag?
« Reply #6 on: July 06, 2014, 05:09:08 PM »
We took or FED out today with the new Mag(Mallory Super mag redone by Cirillo) and external coil. We only got one pass and had a fuel shutoff valve close about 300' out.
We had been running an MSD with the large pro cap and their coil. We seemed to chase different ignition issues all the time. The engine is a 462" healthy 13.8 to 1, Hilborn 4port( used as a throttle body) with Enderle nozzles and jets at the valve.  Our tune up uses about 4-4.5 gallons a pass with burnout.

Today you could hear the difference in the engine tone. Enough so the announcer comment we must be running a healthy dose of Nitro ;D.
I'll post a video in the FED today section when we upload it.
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Offline George

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Re: Switch to Mag?
« Reply #7 on: July 06, 2014, 05:15:03 PM »
Quote from: JrFuel Hayden on July 06, 2014, 02:36:10 PM
George, what compression ratio are you running and what fuel flow ?
 I find with the more combustion pressure you run the more ign you need.
If you are running 13 to 1 compression, and under 2 gpm fuel flow you may not need a mag.
As far as the weight of an on-board battery to power your dist ign, you could go with lighter battery, I sell a 12 volt, 550 amp battery that weights under 5 lbs. And MSD said a 7al only needs a 12-15 amp battery, which I can get that weighs 1 lb.
I'm sure Spud can fill-in some details, on mag vs dist ign systems.

Jon, Hayden Wheels, 800-624-3803


Jon, I have shelved the injected setup. It was 13.4:1 and I ran a waterman 400 ran only a main bypass. I usually ran a .075 pill. A 355 CID SBC 640hp.

George
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dreracecar

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Re: Switch to Mag?
« Reply #8 on: July 07, 2014, 08:27:50 AM »
One of the sponsors sells these  --  GET ONE!!!!
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Offline masracingtd1167

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Re: Switch to Mag?
« Reply #9 on: July 07, 2014, 12:05:29 PM »
I have been very happy with my 7al3 box It has some nice features like a starting line chip ,a shift chip , high side and a retard . I have had zero problems with mine even spraying with a 250 shot of nitrous . Just my 2 cents . Bill
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dreracecar

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Re: Switch to Mag?
« Reply #10 on: July 07, 2014, 12:59:43 PM »
Some classes do not allow driver aids
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Offline masracingtd1167

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Re: Switch to Mag?
« Reply #11 on: July 07, 2014, 01:54:20 PM »
Quote from: dreracecar on July 07, 2014, 12:59:43 PM
Some classes do not allow driver aids
I need all the help I can get !
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Offline George

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Re: Switch to Mag?
« Reply #12 on: July 07, 2014, 06:28:08 PM »
I spoke with the fellow who does Tim Wilkerson's mags and such on my deal recently. He told me I would be better off with the MSD 7AL3 box than my MSD 12LT mag. So far so good but I do wish it was a 20 amp.
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Offline ricardo1967

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Re: Switch to Mag?
« Reply #13 on: July 07, 2014, 06:36:29 PM »
Quote from: dreracecar on July 07, 2014, 08:27:50 AM
One of the sponsors sells these  --  GET ONE!!!!

Bruce, I didn't get it... what's your point here?
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dreracecar

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Re: Switch to Mag?
« Reply #14 on: July 07, 2014, 10:22:25 PM »
Supercat stated that his fuel shutoff closed by itself @300', This overcenter spring will keep the valve from closing and still allow one to pull the cable and close the valve. I machined the first ones 18 years ago and never had the valve close on me.
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