406 sbc. Mallory Unilite, what ignition coil?? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-25-2012, 09:30 AM
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406 sbc. Mallory Unilite, what ignition coil??

Hi, I just bult a 406 sbc and Im almost finished. What I'm looking for is; I have a mallory unilite distributor (that I all ready have laying around) and I'm not looking to spend anymore money then I have to, but what I'm wondering is, what the best ignition coil to use with my unilite? I'm thinking something like Mallory 6852M - Mallory Hyfire 6-Series. But I don't know...

So far I have...
400 sbc 2 bolt 817 block bored .030 over = 406
Stock crank turned- .010/.010
Melling High Volume oil pump
Eagle SIR I-beam 5.7 rods
floting .030 over speed pro flat top 4 valve relief hypertonic pistons
11:1 CR
Clevite bearings
Balenced rotating assembly
190 cc ported aluminum heads 64cc chamber (I know i could have gone bigger but i got a good deal on them)
1.5 roller rockers (Got a good deal on them too!)
Voodoo 60105 Cam and lifters
Lift int/exh .525/.546
Duration @.050 241/249
Weiand Team G intake
850 holley 1 inch spacer
3500 stall
th 350 tranny
and a 4.10 rear end.

Im going to get 28" Slicks and cal tracs eventually. Im just wondering what would be the best ignition coil to use. For some reason ignition has never been my strong suit. Again I'm thinking something like Mallory 6852M - Mallory Hyfire 6-Series. But I don't know...

Thanks for the input by eveyone!

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Old 11-25-2012, 10:05 AM
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406 sbc. Mallory Unilite, what ignition coil??

Mallory recommends the Promaster Coil 29440 55000 volt or Promaster Coil 29625 67000 volt. Summit Racing list price is $87.95 for either one. They also recommend a ballast resistor too.
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Old 11-25-2012, 10:20 AM
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Like I said, ignition is not my strong suit. I have the promaster coil for my unilite... but if that's all you need?? Why would you need an ignition control box like Mallory 6852M - Mallory Hyfire 6-Series?? Sorry I forgot to put that in my first post..
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Old 11-25-2012, 12:05 PM
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I would get a rev limiter box,or maybe that hydraulic cam is enough to limit the RPM
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Old 11-25-2012, 03:24 PM
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I would get a rev limiter box,or maybe that hydraulic cam is enough to limit the RPM
What's the point of the "rev limiter" box??
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Old 11-25-2012, 03:37 PM
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example using your car:
a few races into the season you shift at full throttle at red line from second to high and thats when that T350 decides to let go.instead of 3rd you get neutral and w/e RPM that engine can climb to in neutral.
with a rev limiter the ignition wont allow the engine past the RPM level you set as max.
Ive had 2 T350s let go going into 3rd gear.Your hydraulic flat tappet cam will likely not allowthe engine to over rev too much,,,,,,,but it might?
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Old 11-26-2012, 02:17 PM
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So do you think it would be best to run the car a few times and then deside which ignition control box to get? And also how much of an advantage do you think an ignition control box will give me?

Thanks
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Old 11-26-2012, 04:49 PM
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just think of the rev limiter as an insurance policy that takes effect immediately. Power wise,there are many choices to consider,,,, depends on each exact application and RPMs that made need limiting
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Old 11-27-2012, 02:28 PM
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Quote:
Originally Posted by vinniekq2 View Post
example using your car:
a few races into the season you shift at full throttle at red line from second to high and thats when that T350 decides to let go.instead of 3rd you get neutral and w/e RPM that engine can climb to in neutral.
with a rev limiter the ignition wont allow the engine past the RPM level you set as max.
Ive had 2 T350s let go going into 3rd gear.Your hydraulic flat tappet cam will likely not allowthe engine to over rev too much,,,,,,,but it might?
So what causes the t350 to fall into neutral, instead of going into high; besides apparently having too high RPM's?? And if you set the RPM's to only go so high, wont you run out of top end at the end of the track??

Thanks!
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Old 11-27-2012, 07:39 PM
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what Im saying is" if something breaks,very likely the T350,then the engine has no load and will over rev" Ive had 2 T350s break shifting into 3rd gear, Ive had spider gears break several times, dropped a driveshaft a couple times,even sheared a pinion gear with my 283 powered 65 acadian 4 speed car. Ive had quite a few Muncies break,with each break the engine was trying its hardest to accellerate the car. just get the insurance to save the engine
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