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post #1 of (permalink) Old 02-11-2004, 03:17 PM Thread Starter
 
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TBI Ignition upgrade

Recently purchased TFI upgrade. Coil,wires cap base rotor,
Have not installed yet.Confused with this duraspark 1 and 2? What is the best way to do this without frying control box? Where is this control box. I don't mean to sound stupid but I am! Can i get a duraspark 2 box? Should I trash the whole notion and go GM HEI? [img]images/graemlins/thud.gif[/img]
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post #2 of (permalink) Old 02-11-2004, 05:59 PM
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Re: TFI Ignition upgrade

If you do a search, there are about 1000 posts on this topic. The problem you will run into is the duraspark 1 module will not last long without a resistor wire. The coil is expecting to see 12 volts, but it can't due to the resistor wire required by the module. While it is still an upgrade, it is not as good as it could be.

You can use a HEI module with your distributor. The module to get is for a 78 Camaro w/350. There is a decent write-up available for this located Here . I just finished doing this to my Jeep and the difference is night and day. However, I can't testify as to longevity of it, since I am still building on my Jeep and have not run it a significant amount of time.
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post #3 of (permalink) Old 02-11-2004, 06:28 PM
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Re: TFI Ignition upgrade

Great article. Very simple but with enough detail. HEI made cheap. I like it, passes the KISS principle.

[img]images/graemlins/RockOn.gif[/img]
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post #4 of (permalink) Old 02-11-2004, 06:55 PM
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Re: TFI Ignition upgrade

Here are some pics of the brackets I made for the module and the coil. They are both made of aluminum to help dissipate the heat.

HEI Module

TFI Coil

The HEI module is susceptible to heat, so to test my mounting bracket, I turned the key to run and just left it sit for 20 minutes without the engine running. It did not get hot, so I guess it is working.
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post #5 of (permalink) Old 02-11-2004, 08:28 PM Thread Starter
 
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Re: TFI Ignition upgrade

So all I need to do is add this hei module. I don't eliminate the resistor wire? [img]images/graemlins/confused.gif[/img]
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post #6 of (permalink) Old 02-11-2004, 08:44 PM
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Re: TFI Ignition upgrade

Since mine was a 75, I didn't have a resistor wire. You probably have one and you would need to remove it on your set up to get the full effect of an ignition upgrade.
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