Custom/DIY spark plug wire kits or sources? For wasted spark coilpacks.
#17
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Join Date: Sep 2005
Location: Fort Payne, AL
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I do not know anything about wasted spark installation. I do have my engine out of my car. Is there something that I would need to do to prepare for a WS setup before the engine is installed
#18
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Originally Posted by Glider
I do not know anything about wasted spark installation. I do have my engine out of my car. Is there something that I would need to do to prepare for a WS setup before the engine is installed
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Originally Posted by Charlie944
Hey Brian! I called Magnecor and had them whip a custom set of R-100 10mm race wires with GM DIS 90deg ends and the their Porsche 944 spark plug ends. I just had to give them my custom wire lengths. They were $125.99. Their KV-85 (8.5mm) will be less expensive and it is the same wire just has less silicone jacketing.
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Originally Posted by Chris White
Don't need a part number - call Magnacore and just ask for a set of 944 wires that will fit the tec3 coil pack. They know this set up well!!
With the tec3 ignition contol there is enough power that i have never worried about plug wires much. I think that it would work with pipe leaners strung together
Chris White
With the tec3 ignition contol there is enough power that i have never worried about plug wires much. I think that it would work with pipe leaners strung together
Chris White
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Originally Posted by theedge
Thanks for the info! Do you have any specs on the coilpacks themselves? Im trying to calculate the dwell for the MS.
#22
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Originally Posted by Chris White
Not sure what I can tell you – the Tec3 ignition system is a little (OK a lot) different than most. It calculates dwell based on rpm and load. I don’t know what the electronics are that are buried in the base of the tec3 coil pack. The coils them selves are GM style units.
Ill test again today and see.
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Originally Posted by Raceboy
3ms should be fine.
However, heres a pic that Chris might enjoy. I accidentally noticed they could do this, so I removed the test wires and ran it for a second like this to take a pic. True, spark length etc isnt a true measure of coil pack performance apparently, but its damn cool to see and it backs up the sticker on the coilpack
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Originally Posted by theedge
Nope, the drivers werent happy there either. Ive tried 1.5, 2, 2.5, and 3. All resulted in similar heating up of the coil drivers along with a fading spark as they heated up. Im going to post on the MS forums now and see what ideas they have. Ill also try to dig up a proper resistor so I can see whats going on using my scope.
However, heres a pic that Chris might enjoy. I accidentally noticed they could do this, so I removed the test wires and ran it for a second like this to take a pic. True, spark length etc isnt a true measure of coil pack performance apparently, but its damn cool to see and it backs up the sticker on the coilpack
However, heres a pic that Chris might enjoy. I accidentally noticed they could do this, so I removed the test wires and ran it for a second like this to take a pic. True, spark length etc isnt a true measure of coil pack performance apparently, but its damn cool to see and it backs up the sticker on the coilpack
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For the curious people, I think I found the (or a) issue. It seems my MegaSquirt is putting out 30ms+dwell long ignition pulses intermittently along with proper length pulses. This means is putting out several normal sparks, strong spark, several normal sparks over and over. That then puts the VB921s (the coil driver ICs, TT) into current limit mode for 30ms or more. Current limit kicks in at around 7 amps. They get real hot real fast when this is happening.
Im trying to figure out whats up with the 30ms long pulses.
Im trying to figure out whats up with the 30ms long pulses.
#28
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Originally Posted by Chris White
I use that as a coil pack test - you can see it from the drivers seat!!
#30
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I use a Tec coil pack with stock Beru wires and connectors, they work fine and you can solve the seal or looseness by placing an appropriately sized electrical grommet over the post (ie it sits between the post and the boot of the plug wire). It's a $2 solution that works well.