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Old 05-15-2016, 09:55 AM   #1
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Thinking about our ignition system

Been giving some thought about how to upgrade the spark. Our ignition is made up of spark plugs, coils, in some cases high tension wires, wiring harness, pcm grounding triggers and 12v. If I missed something let me know. This is just a bench racing session so inputs are more than welcomed.
The spark plugs are selected for heat range and durability.
Coils, there are several options, oem 03-05 and the 06+ dual coils, MSD and SoS. Coils being transformers are nothing more than a primary coil and a secondary coil. These internal coil windings ratio's can be changed by the manufacture to increase spark voltage limited by size, heat and current capacity. The 03-05 high tension wire can be upgraded in size and insulation quality. The wiring harness on the power supply side (12v ASD relay) is wrapped with the injector's wiring as both injectors and coils have the same supply source and only splits on top of the front of the engine. These harnesses can be separated and simplified to power the injectors and coils in a straight forward manner as current draw is different between the injectors and coils. The trigger side (PCM) of the harness is also wrapped together. So the two harnesses can be separated and simplified. This leaves the 12v supply and probably the one thing that can make a significant difference in performance by raising it. And food for thought racing batteries are 16v.
A hot ignition is critical in my book especially when SuperCharged.

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Old 05-15-2016, 01:44 PM   #2
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I would think a multi spark upgrade would be desirable in this instance too.
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My other truck is an R/T

2005 Hemi Ram Sport RC 2wd Yellow. 340RWHP, 350RWTQ
Comp 268 cam, P.I.E. Milled & Ported Heads with 2.02/1.65 Manley backcut valves, Compression bumped to 10.5:1, 6.1 Springs & Pushrods, Pacesetter Longtubes, 87MM Moe's TB, VaraRam Hemi Under Glass Ram Air Intake, PATC flexplate, 46RH Conversion By Martin Saine w/Full manual VB & 3500 stall convertor, Diablo Tuned by Jay Greene, Dual 3" Exhaust w/ SpinTech 5000 series dual in & out muffler (dumped)., Taylor Shorties, Spindle & Flip 5/7 drop, Energy Suspension Urethane bushings F & R, SRT 20s, Cal-Tracs, Street Scene Grill Inserts, Hurst 1/4 Stick floor shifter, SRT-4 Seats, Belltech Street Perfomance Shocks......this all started as an exhaust replacement/upgrade & new tires project. WTF !?
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Old 05-15-2016, 05:14 PM   #3
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Originally Posted by Hugh Jassole View Post
I would think a multi spark upgrade would be desirable in this instance too.
What would that consists of? Explain what you have in mind.
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Old 05-15-2016, 07:28 PM   #4
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That's just it, I'm not sure on these. On my R/T I have an MSD 6AL. Is there such an animal for a hemi ?
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My other truck is an R/T

2005 Hemi Ram Sport RC 2wd Yellow. 340RWHP, 350RWTQ
Comp 268 cam, P.I.E. Milled & Ported Heads with 2.02/1.65 Manley backcut valves, Compression bumped to 10.5:1, 6.1 Springs & Pushrods, Pacesetter Longtubes, 87MM Moe's TB, VaraRam Hemi Under Glass Ram Air Intake, PATC flexplate, 46RH Conversion By Martin Saine w/Full manual VB & 3500 stall convertor, Diablo Tuned by Jay Greene, Dual 3" Exhaust w/ SpinTech 5000 series dual in & out muffler (dumped)., Taylor Shorties, Spindle & Flip 5/7 drop, Energy Suspension Urethane bushings F & R, SRT 20s, Cal-Tracs, Street Scene Grill Inserts, Hurst 1/4 Stick floor shifter, SRT-4 Seats, Belltech Street Perfomance Shocks......this all started as an exhaust replacement/upgrade & new tires project. WTF !?
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Old 05-15-2016, 07:44 PM   #5
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Quote:
Originally Posted by Hugh Jassole View Post
That's just it, I'm not sure on these. On my R/T I have an MSD 6AL. Is there such an animal for a hemi ?
No, the hemi doesn't have a distributor. There are MSD replacement coils.
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Old 05-15-2016, 07:53 PM   #6
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I bet you could use a spark booster in some way that raises the coils voltage to 16v only down side is I don't know if the computer can handle it. I don't really see a need for it for the most part I am yet to have an issue at all just make sure the gap is good and your all set
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Old 05-15-2016, 08:21 PM   #7
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This just a little bench Racing looking at what if's....
Back in the day of cars using 6vdc batteries, which really sucked. You could use a 8vdc or 12v DC battery to turn the starter and then everything else used a reduce voltage around 6-8vdc from a load resistor, some had taps for different voltages. Looking at our trucks, which charge around 13.8-14.2vdc. What about using alternator voltage to power the coils?
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1956 Jeep Pickup Hemi powered "Street Rod project"

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

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Old 05-16-2016, 11:58 AM   #8
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ok, thought so. You know, I'm pretty sure these coils have 12v going to them all the times and that they get told to fire by completing the ground circuit. At least that's the way they do it on the J-Tec systems in the old 5.9s and 4.7s in the Dakotas. It seems like it might not be that hard to install a higher voltage extra battery, and feed the coils voltage from it. Or, is this too much of a gypsy rig for your taste ?
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My other truck is an R/T

2005 Hemi Ram Sport RC 2wd Yellow. 340RWHP, 350RWTQ
Comp 268 cam, P.I.E. Milled & Ported Heads with 2.02/1.65 Manley backcut valves, Compression bumped to 10.5:1, 6.1 Springs & Pushrods, Pacesetter Longtubes, 87MM Moe's TB, VaraRam Hemi Under Glass Ram Air Intake, PATC flexplate, 46RH Conversion By Martin Saine w/Full manual VB & 3500 stall convertor, Diablo Tuned by Jay Greene, Dual 3" Exhaust w/ SpinTech 5000 series dual in & out muffler (dumped)., Taylor Shorties, Spindle & Flip 5/7 drop, Energy Suspension Urethane bushings F & R, SRT 20s, Cal-Tracs, Street Scene Grill Inserts, Hurst 1/4 Stick floor shifter, SRT-4 Seats, Belltech Street Perfomance Shocks......this all started as an exhaust replacement/upgrade & new tires project. WTF !?
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Old 05-16-2016, 12:20 PM   #9
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The only issue is the injectors and the asd relay are all tied into the same power circuit. The comp does monitor the coil voltage by taking samples of it momentarily as the truck runs too. It may work for short term use but it's not needed and why hassle with it. If it's not broke don't fix it. There's a few people that need to follow that moto!
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Old 05-16-2016, 12:21 PM   #10
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Quote:
Originally Posted by charged392 View Post
The only issue is the injectors and the asd relay are all tied into the same power circuit. The comp does monitor the coil voltage by taking samples of it momentarily as the truck runs too. It may work for short term use but it's not needed and why hassle with it. If it's not broke don't fix it. There's a few people that need to follow that moto!
In this case, I'd agree. Not worth being on the bleeding edge
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My other truck is an R/T

2005 Hemi Ram Sport RC 2wd Yellow. 340RWHP, 350RWTQ
Comp 268 cam, P.I.E. Milled & Ported Heads with 2.02/1.65 Manley backcut valves, Compression bumped to 10.5:1, 6.1 Springs & Pushrods, Pacesetter Longtubes, 87MM Moe's TB, VaraRam Hemi Under Glass Ram Air Intake, PATC flexplate, 46RH Conversion By Martin Saine w/Full manual VB & 3500 stall convertor, Diablo Tuned by Jay Greene, Dual 3" Exhaust w/ SpinTech 5000 series dual in & out muffler (dumped)., Taylor Shorties, Spindle & Flip 5/7 drop, Energy Suspension Urethane bushings F & R, SRT 20s, Cal-Tracs, Street Scene Grill Inserts, Hurst 1/4 Stick floor shifter, SRT-4 Seats, Belltech Street Perfomance Shocks......this all started as an exhaust replacement/upgrade & new tires project. WTF !?
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