This is the transistor trick i built.
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It Runs!
Joined: Aug 2003
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From: PA
This is the transistor trick i built.
Its just like what kent showed recently, and I just did it a tiny bit different. Cant wait to try it out some day! haha. I pretty much have supplies to make yet another one, and I bought all of it dirt cheap, as I work at Radioshack now. I cant wait till the boards for the auto-switching one are put out!
Joined: May 2002
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From: Ottawa, Soviet Canuckistan
Originally Posted by hornbm
wtf does it do?
Why would you want to do this?
Traditionally when mounting FC coils in our car we use our J109 (stock) ignitors to fire the FC coil. They aren't made for this purpose and don't give as powerful a resulting spark as the FC ignitor would if it were firing the FC coil
We can't trigger the FC ignitor directly from the dizzy like our J109 because it was designed to be fired by an ECU, so it expects a completely different signal.
So if the J109 isn't powerful enough, and the FC ignitor can't be fired from the dizzy, what's the solution? Condition the the J109's output to trigger the FC ignitor which fires the FC coil. Results in a more powerful spark without the need for installing an ECU or finding an ignitor as powerful as the FC that can be fired directly off the dizzy.
That's why.
Jon
Last edited by vipernicus42; Nov 25, 2005 at 04:33 AM.
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vrrmmmmm
Joined: Jul 2005
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From: BAY
Originally Posted by vipernicus42
Once he mounts it up and wires it up it will allow him to trigger a second gen ignitor from a J109.
Why would you want to do this?
Traditionally when mounting FC coils in our car we use our J109 (stock) ignitors to fire the FC coil. They aren't made for this purpose and don't give as powerful a resulting spark as the FC ignitor would if it were firing the FC coil
We can't trigger the FC ignitor directly from the dizzy like our J109 because it was designed to be fired by an ECU, so it expects a completely different signal.
So if the J109 isn't powerful enough, and the FC ignitor can't be fired from the dizzy, what's the solution? Condition the the J109's output to trigger the FC ignitor which fires the FC coil. Results in a more powerful spark without the need for installing an ECU or finding an ignitor as powerful as the FC that can be fired directly off the dizzy.
That's why.
Jon
Why would you want to do this?
Traditionally when mounting FC coils in our car we use our J109 (stock) ignitors to fire the FC coil. They aren't made for this purpose and don't give as powerful a resulting spark as the FC ignitor would if it were firing the FC coil
We can't trigger the FC ignitor directly from the dizzy like our J109 because it was designed to be fired by an ECU, so it expects a completely different signal.
So if the J109 isn't powerful enough, and the FC ignitor can't be fired from the dizzy, what's the solution? Condition the the J109's output to trigger the FC ignitor which fires the FC coil. Results in a more powerful spark without the need for installing an ECU or finding an ignitor as powerful as the FC that can be fired directly off the dizzy.
That's why.
Jon
Thread Starter
It Runs!
Joined: Aug 2003
Posts: 955
Likes: 2
From: PA
I did not design this, or come up with this idea, just so you know. You need to go here to find out more https://www.rx7club.com/1st-gen-archive-71/ignition-2gcdfis-w-tt-transistor-trick-write-up-simplified-design-484176/ . I only followed his directions on this. I just moved things a little is all.
Let us know what you think of it when you try it out. Good to see that you were able to follow the write-up.
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