1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Should I convert to Direct Fire Ignition?

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Old 04-03-14, 09:44 AM
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Originally Posted by luiml73
Is the only reason for using the HEI over the J109's is price and availability? My buddy says he has around 50 of those109's in his shed.
Ah, it wasn't just a whim. The HEI can handle higher energies. The stock J105/J109
only handle up to about 4 amps and the HEI typically can handle 6 amps. Then if you
get some HIPO ones from, say Summit, they can handle higher energies or faster
cycles. If you use your buddies J109s, make sure to test them first to get good ones
and then grab some extras for when they fail.
Old 04-03-14, 09:54 AM
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Oh, I do plan on using brand new HEI's. I just wanted to know how much better they worked over the 109's. And now I know

Thanks
Old 04-03-14, 11:00 AM
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Is the a part number I can use to pick up 2 Hei's at Autozone?
Old 04-03-14, 11:29 AM
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Found it. Duralast Dr100
Old 04-03-14, 12:12 PM
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Originally Posted by luiml73
Found it. Duralast Dr100

Yep, thats the one.
Old 04-03-14, 12:23 PM
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Originally Posted by t_g_farrell
Yep, thats the one.
Any difference between these and the Accel 35361?
Old 04-03-14, 03:05 PM
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Originally Posted by luiml73
Any difference between these and the Accel 35361?
Same but supposedly higher performance. I don't know the specs on them but for
almost 2x the cost of the duralast they should be better.

Looks like they have a settable rev range and rpm range. I'm thinking set it to 4 cylinder
and 8000 rpm and your good to go.
Old 04-03-14, 04:10 PM
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I ended up buying 2 of these. http://m.ebay.com/itm/200710680452?nav=SEARCH

Should i also get a pair a heat sinks to mount them?
Old 04-03-14, 05:12 PM
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Should have gotten the ones from autozone. I paid 24.95 each and they are lifetime. So if I burn em up then they get replaced for free.
Old 04-04-14, 09:11 AM
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Originally Posted by Cookboy
The hei ignitors replace the msd boxes.
See the thread mentioned above.
I did this and it was what led to the MSD box. One of the ignitors went bad and I had a hell of a time diagnosing it.
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