924Board.org

Mike9311 · Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish

My hats off to you...

It seems crazy to race every weekend all the while while maintaining that race effort. Then there is your turbo and your job! Maybe I am jealous of your management skills

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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car

924RACR · Posted: Tue Aug 11, 2020 12:09 am Post subject:

LOL - I don't have kids. Problem solved.

PS - we don't usually race back-to-back weekends, and that's with two different racecars, so that spreads the load...
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

kondzi · Joined: 02 Jul 2018 Posts: 485 Location: Poland/EU

Short on ignition. I've been using Ford EDIS for many years and many projects. In my 931 I have EDIS4 and Ford Fiesta MK7 Coil Pack (installed on a custom mount where factory distributor was) and Fiesta MK7 Spark Wires. Although it's possible to do direct coil fire without using the Ford EDIS Controller, I kept that. Mainly because I left CIS, and did not convert to EFI (even though I've built the Ignition Management on MegaSquirt MS2 - Standalone, capable of almost anything). Ford's EDIS is bulletproof and if something goes wrong, with just a sensor and a 36-1 trigger wheel it will go into "service mode" with fixed 10 deg BTDC. It's doing signal conditioning very nicely, so the exetrnal ignition control (MS2 for me) gets a nice square signal - no issues with signal noise at all. I'm breaking a bit to change AAV with IAV that can be PWM controlled by MS2, bought all the parts already, but just don't have time. This brings me much closer to the EFI altogether. The thing is I invested heavily into my CIS (new injectors, rebuilt distributor, WUR) and just don't want to put it on the shelf.
For the newer projects running EFI I'm switching from MegaSquirt to Ecumaster more and more - much more user friendly and lot's of things built in (2 knock sensors, WB controller...). Well it supposed to be short xD Happy to exchange my experience in that area if needed.
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Konrad
'89 951 US
'88 Mustang 5.0 LX Convertible (factory specs)
'84 911 Carrera 3.2 RoW (factory specs)
'81 931 RoW (TBD)
'81 Ford Capri 2.8i (factory specs)
'79 Ford Capri 2.9 (heavily modded)

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

What all sorts of trigger wheel teeth configurations does MS like using?

I’m thinking about... I have the double v belt pully for AC with one unused pulley on it..
Thinking about drilling holes all around the unused pulley and making it into a trigger wheel.. But what would be the best amount of teeth and gaps?

I think I could put the pulley on a ratchet or even a saw blade with the correct amount of teeth to then use as a jig/cogwheel to evenly space my holes out with on my drill press..

I could also set up a surface grinder type setup with my angle grinder in the XY vice and the pulley on the chuck with the cogwheel for spacing, and cut slots around the outside of the pulley by lowering the chuck into the grinder instead of drilling holes..

And it would be a fun job.. Good excuse to run some machines

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80 Turbo - Slightly Modified

kondzi · Joined: 02 Jul 2018 Posts: 485 Location: Poland/EU

I think for pulley-ish trigger wheels most common are 36-1. That's mainly because of a small diameter of the pulley (hard to fit so much teeth and have reliable reading). Flywheel rings can have more. 964 has 60-2. Earlier Carrera 3.2 had, if I remember correctly, 129-2 (maybe) on flywheel ring. I like the idea of drilling holes in the pulley to make it trigger wheel. Usually laser/water jet mine.
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Konrad
'89 951 US
'88 Mustang 5.0 LX Convertible (factory specs)
'84 911 Carrera 3.2 RoW (factory specs)
'81 931 RoW (TBD)
'81 Ford Capri 2.8i (factory specs)
'79 Ford Capri 2.9 (heavily modded)

924RACR · Posted: Thu Aug 13, 2020 7:23 am Post subject:

Agreed, am running mine with 36-1, which was the trigger wheel Beckett had made up.

I too like the idea of trying machining the existing pulley, excellent idea!
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

Cool, maybe ill do that..

36 teeth with one missing as if their was a total of 36 before removing one?

Would it matter if it was like 25, 30, 32, 38?
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80 Turbo - Slightly Modified

924RACR · Posted: Fri Aug 14, 2020 4:34 am Post subject:

Exactly - one every 10 degrees except skip one.
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

kondzi · Joined: 02 Jul 2018 Posts: 485 Location: Poland/EU

Read somewhere, that it might be smart to use 36-2 trigger wheel, as when cranking the rev speed may vary, and the ECU may pick up false signal.
That’s more like an anecdote, not a guideline honestly. Has been using 36-1 for years, most of older Ford cars use that trigger wheel pattern as well.
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Konrad
'89 951 US
'88 Mustang 5.0 LX Convertible (factory specs)
'84 911 Carrera 3.2 RoW (factory specs)
'81 931 RoW (TBD)
'81 Ford Capri 2.8i (factory specs)
'79 Ford Capri 2.9 (heavily modded)

924RACR · Posted: Fri Aug 14, 2020 8:18 am Post subject:

Huh... well my observation of the cranking speed is that's it's slow enough to not really matter... LOL

Still seems to normally fire within 2-3s.
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

Should the spaces and teeth be about the same width? Like 1/4” spaces and 1/4” teeth?
Just make them even, whatever it’ll fit for size?

And what kind of sensor exactly?
Just any old crank/cam sensor that picks up teeth?
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80 Turbo - Slightly Modified

Fifty50Plus · Posted: Sun Aug 16, 2020 4:00 am Post subject:

I did this on my Benz race car some years ago. I had a machinist drill and tap the harmonic balancer every 10 degrees for an M6 bolt. He put in stainless bolts and my magnetic pickup couldn't "read" them. Once we figured out the problem we replaced them with steel bolts and problem solved.
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1979 924 NA race car
1982 924 NA race car - Sold
1982 924 Turbo almost a PoS
1981 924 Turbo a real PoS, new engine
1982 924 Turbo nice body, blown engine
1972 911 E race car - going to Vintage
Various 944s to become IT-S race car

kondzi · Joined: 02 Jul 2018 Posts: 485 Location: Poland/EU

924RACR · Posted: Mon Aug 31, 2020 9:05 pm Post subject: Modern fully electronic ignition

Finally got some time yesterday to spend on the Turbo, taking a short break from all these needy racecars. Installed the new Bosch 4-tower coil, part # 032 905 106F from 2011-2014 VW Golf/Jetta, along with an inexpensive set of pretty blue plug wires from Amazon.

Objective with this was to finally completely cure my misfire and inexpensively convert from running the stock distributor, coil, and ignition amplifier to modern direct-coil design.

Fitment of the wires on the plugs coulda been better; no doubt a higher-quality sourced part would address that. But they work - whaddya want for $20!

Coil was super-easy to wire in, just spliced in the pre-loaded pigtail bought from Amazon (part # 1J0 973 724, $13 on Amazon with pigtail). The two ignition leads from the Microsquirt, power and ground. Mounted it in place of the distributor, on one of Dan Beckett's pretty distributor delete mounts - designed for the Ford EDIS module, but I made a new top plate to fit the VW coil and offset towards the cam cover to improve clearance to the firewall.

Flashed in the new engine cal (just had to switch coil type to Wasted Spark) and fired right up.

Haven't driven much yet, but already the spark trace looks much cleaner, without the jagged spikes from the old coil. Much happier.

Car is really starting to be nice - gonna have to start driving it soon, the excuses are going away! Also replaced a flaky voltage regulator, which I was seeing in my logs wasn't always charging the battery. No wonder I was fighting starting issues...
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype