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Old 12-02-2016, 12:32 PM   #1
2002tiiguy
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WAY better wasted spark option

Bosch coil 0221503002
Fits 95 Saab 900 2.5 V6
95 Saab 9000 3.0 V6
95 Ferrari F50 4.7L V12

Get this http://www.efiexpress.com/catalog/pr...products_id=61

and get your megasquirt option connector

Dwell times are in the included PDF along with the wiring diagram.

Reuse original Plug wires.

I plan on mounting my coil to the firewall and flipping the wires in the loom.

Firing order is 1-5-3-6-2-4
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File Type: jpg resize coil.jpg (80.7 KB, 145 views)
File Type: pdf 0221503002.PDF (1.13 MB, 234 views)

Last edited by 2002tiiguy; 12-03-2016 at 07:47 AM. Reason: oops wrong firing order
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Old 12-29-2016, 02:41 AM   #2
mr2peak
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This is cool. Commented to save.
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Old 12-29-2016, 02:46 AM   #3
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The other common option, for comparison

http://www.mye28.com/viewtopic.php?t=68448
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Old 12-31-2016, 08:43 PM   #4
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Good choice.
Slightly more Mj then the IGN6 but, it's like $50 more expensive. :0
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Old 01-01-2017, 10:56 PM   #5
2002tiiguy
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yeah i know, its not perfect, but being able to use bosch connectors, re-use the stock wires, and you can order this coil from an auto parts store.
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Old 08-02-2017, 10:51 PM   #6
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Bumping because I just used this on my M30 build and it works great so far. Cut the end off the back of the plug wire guide and flipped the wires around and it makes the plug wires perfect lengths to mount on the battery tray.

More people need to know!
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Old 08-02-2017, 11:54 PM   #7
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Do I still need extra igniter modules to use this?
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Old 08-03-2017, 12:09 AM   #8
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Yep, you'll need a total of three BIP373's.

I have the DIYPNP so it was a breeze to modify. Had the board modified and coil wired up for a test start in about an hour.
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Old 08-03-2017, 01:05 PM   #9
2002tiiguy
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lucky non ix people without washer bottles in the battery tray lol
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Old 08-03-2017, 01:16 PM   #10
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lol, I had to move the battery which was a little more work than a washer bottle!

Especially on an early model where there's no battery-sized compartment in the trunk

Meant to post a couple photos, but forgot.

Re-arranged plug wires:


Final product before being I screwed it down:


I would like to make a bracket instead of just self tapping screws into the battery tray, but that'll be later some time. Everything mostly fits in the plug wire guide but it kept popping open in the rear. It's shallower than the front because they didn't intend for all 6 wires to be in that location.
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Old 08-03-2017, 03:54 PM   #11
downforce22
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i still dont get the point of wasted spark
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Old 08-03-2017, 04:29 PM   #12
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Theoretically, less loss in spark energy due to no longer using a distributor... Also there's no cap/rotor to wear out or break.

In my case, I did it to clear room for down pipe and/or wastegate and because I like working on electronics. Plus this Bosch coil was 1/4 the cost of a distributor cap.
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Old 08-03-2017, 05:22 PM   #13
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Even if you don't really GET it get that you can use powerful coils and get to run a shit ton more duration.
unstoppable spark plus total and complete burn time is where it comes down to.

also, ya. So you ever look at ur chewed up cap/rotor and wonder if it's time to replace it?
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Old 08-03-2017, 05:26 PM   #14
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Quote:
Originally Posted by downforce22 View Post
i still dont get the point of wasted spark
I've been shocked many a times by both, and that alone will tell you the difference, ha! The stock single coil is what, 40,000v having to fire 3x per engine revolution, vs having three 40,000 firing once per rev. The fact that it's wasted spark is just an easy way to package, use less ignition components, plus you get the benefit of capturing any power potential of un-burnt fuel.
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Old 08-04-2017, 03:44 AM   #15
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if you dont have any actual ignition issues then all these fancy coils, ignition boxes, blah, blah etc will do next to nothing tangible unless you are really pushing the envelope with high rpm or high cylinder pressure.

from a NA perspective the only positive thing ive seen with wasted spark is it allows you to easily add a cam sensor in its place for fully sequential injection , yet to see much in the way of benefit of sequential injection except nicer idle but will probably getting a better ECU soon to properly explore injector timing.

one negative is it looks ugly as hell if you have a huge coil sitting on the valve cover so if you do it mount it somewhere else
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