COP 4 cylinder - 924s/944 & other content - Very Long Po

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Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

Now some photos f the reinforcement I put on my second iteration of the sensor mount. If this works I will remove it and spend some quality time with it and my dremmal cleaning it up and then a good sandblasting and paint.
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2008-11-29 EDIS 007.jpg
2008-11-29 EDIS 007.jpg (117.36 KiB) Viewed 12771 times
2008-11-29 EDIS 006.jpg
2008-11-29 EDIS 006.jpg (114.97 KiB) Viewed 12772 times
2008-11-29 EDIS 002.jpg
2008-11-29 EDIS 002.jpg (62.2 KiB) Viewed 12772 times
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

More
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2008-11-29 EDIS 008.jpg
2008-11-29 EDIS 008.jpg (110.72 KiB) Viewed 12768 times
2008-11-29 EDIS 009.jpg
2008-11-29 EDIS 009.jpg (104.49 KiB) Viewed 12768 times
2008-11-29 EDIS 010.jpg
2008-11-29 EDIS 010.jpg (83.05 KiB) Viewed 12768 times
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

More

Note that I trimmed the mounting bracket that holds the magnet so it has more clearance from the wheel. This makes things much easier. It may only be 3-4 mill but in this case it matters

It also lets you see the curved slot I cut to allow it to be adjusted. It makes setting it up easier.
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2008-11-29 EDIS 011.jpg
2008-11-29 EDIS 011.jpg (74.63 KiB) Viewed 12765 times
2008-11-29 EDIS 012.jpg
2008-11-29 EDIS 012.jpg (83.02 KiB) Viewed 12765 times
2008-11-29 EDIS 014.jpg
2008-11-29 EDIS 014.jpg (76.4 KiB) Viewed 12765 times
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

Ok a better photo of the trimming I did
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2008-11-29 EDIS 005mod.jpg
2008-11-29 EDIS 005mod.jpg (111.35 KiB) Viewed 12764 times
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

Now the other set up.

I hacked the you know what out of it. Again of this works I clean it up (trim off the excess metal of the bracket) and neaten up the hole by bringing it out to the perimeter ridge. I will then sand blast it and paint it . . . Wait if I do this than I will have to clean up the rest of my motor. :shock:
Attachments
2008-11-29 EDIS 021.jpg
2008-11-29 EDIS 021.jpg (104.43 KiB) Viewed 12762 times
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

And the test removal. Tight fit but it slips off and on with just a little wiggling.
Attachments
2008-11-29 EDIS 020.jpg
2008-11-29 EDIS 020.jpg (158.4 KiB) Viewed 12760 times
2008-11-29 EDIS 019.jpg
2008-11-29 EDIS 019.jpg (130.31 KiB) Viewed 12760 times
2008-11-29 EDIS 018.jpg
2008-11-29 EDIS 018.jpg (116.91 KiB) Viewed 12760 times
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

So now I am all done with that I just have to determine what one I am going to use. For that matter I can use one while I am cleaning up the other one.

Note to self: The torque spec for the cam gear bolt is 45nm = about 35ftlbs.

For reinstallation and I am going to use loctite blue. Same goes for all the screws and bolts etc. I use lock washers as well but they just don't seem to hold. Thread locker is a great bit of insurance. I like the blue as it will dissolve in temps over 300deg. I think it is referred to as being semi permanent. The red is what they call permanent. It is like putting epoxy on them. It just does not come off!!!!

The bolt on the cam is a sob to get off. The thread locker they put on it is extremely hard to remove. You MUST have a cheese head bolt tool.

What else.

I now have to find places to mount everything. The motor compartment is quire tight in my car. I was actually thinking of mounting everything to the strut tower brace with hose clamps to the factory mounting brackets. The only other place I can think of would be in upper rad support but I am afraid that it would see a bit of water there as there is actually air ducted through this area as part of the cooling. I am going to be putting in inter cooler up in the nose along with the center panel from a 931. Since I am not sure as to how the plumbing for this is going to go I am inclined to not do this. The relatively open area on the passenger side of the motor is not a good place as the exhaust headers are there and it gets quite hot. I could fabricate heat shields but again not fun. Maybe I will put everything under the dash and just mount the coil pack and run all the wires. This may be a good option as it puts all the electronics in a single location.

I think I am going to bench test the EDIS before installation. This should be fun. This way I can make sure I am getting spark etc. This should make the in-car install much easier. Getting the polarity of the sensors correct etc on the bench is much better than mucking with it in the car out in the cold.

I know I am jumping the gun here but I have to seriously start thinking about the AUX port and using it with the WBO2.
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

I am thinking again. And just to make dr.occa head hurt more how about this. :D

I was thinking that with the 72-2 wheel you could actually have two complete ignition systems in place by mounting two sensors 180deg out rom one another. That would allow for two plugs per cylinder. You could then have two MJ units and actually put a slightly different advance between the two plugs. Wouldn't that be fun!!!! I think there are some Porsche's out there that have two plugs so maybe this is not as crazy as it seems. The question would be sinking them but once you got that figured out.. . . Ohh the fun you could have.

OK I will stop now.
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Dean

DannyP
Posts: 417
Joined: Sun Apr 09, 2006 3:48 pm

Post by DannyP »

Dean, I am building a twin plug 2.7 RS spec 911. I had thought of that also, and in your case it probably has merit. It all depends on piston and combustion chamber shape. I have been told by a VERY knowledgeable engine guy that staggering the timing on MY engine is unnecessary. So I will be using one Megajolt to control two EDIS units, fed by one VR sensor.

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

Now on to maps and things.

I have been looking for a good base map fr my 924s For those that do not know it is really a 944 so that is where I have been looking. I have not been able to find a NA map but I have found several from turbo cars. I even found one form what was said to be from wilkes. What I did was to take the non boost portion of the map and extrapolate it over the MJ map. I then brought the over all timing down by about 5 deg across the board. I did this for several reasons.

1. From what I can find the stock timing at idle (800 rpm) is 4.7 deg. I rounded this to 5
2. I am sure that the wilks map was designed for premium gas
3. The 951 (944 turbo) has lower compression pistons giving them lower static compression allows for more timing


What shocked me was that after making the map it looks to be very similar to the baseline map supplied with the unit. How was the baseline map developed?

Has anyone done a sort of statistical analysis of maps versus motor size, static compression?

Anyway here is my map and where I got the info for it.

I hope top be testing it later today.
Attachments
951-frwilks-map.jpg
951-frwilks-map.jpg (209.1 KiB) Viewed 12715 times
924s-5deg-3d.jpg
924s-5deg-3d.jpg (85.06 KiB) Viewed 12715 times
924s-5deg-2d.jpg
924s-5deg-2d.jpg (100.87 KiB) Viewed 12715 times
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

If anyone wants to fool with it I have attached it. I am having second thoughts on the WOT at low rpm (upper left corner of map). I think that I should probably take a little timing out of this area/corner. This tends to correlate with both the base line here and other maps I have seen for the 951.
Attachments
924s02-5DEG-BASE.mjlj
(799 Bytes) Downloaded 523 times
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

IT IS ALIVE!!!!!

Post by Dean924s »

It still needs a lot of work but IT RUNS!!!!!!

It Did not start the first try. I swapped the sensor wires and it purred like a kitten.

I have to clean up the wires and finalise the wiring and install the MJ unit.

Here is a YouTube video of it running and me commenting.

http://www.youtube.com/watch?v=ufkbAqUPiAQ
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

Pix

The first two were taken with the flash so you can not ell it is running the third as you can see it is running
Attachments
2008-12-01 EDIS 001.jpg
2008-12-01 EDIS 001.jpg (99.39 KiB) Viewed 12682 times
2008-12-01 EDIS 002.jpg
2008-12-01 EDIS 002.jpg (105.18 KiB) Viewed 12682 times
2008-12-01 EDIS 003.jpg
2008-12-01 EDIS 003.jpg (105.36 KiB) Viewed 12682 times
Last edited by Dean924s on Mon Dec 01, 2008 8:45 pm, edited 1 time in total.
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Dean

Dean924s
Posts: 228
Joined: Fri Nov 07, 2008 2:57 am
Location: USA - MA

Post by Dean924s »

More Pix
Attachments
2008-12-01 EDIS 004.jpg
2008-12-01 EDIS 004.jpg (133.48 KiB) Viewed 12680 times
2008-12-01 EDIS 005.jpg
2008-12-01 EDIS 005.jpg (124.8 KiB) Viewed 12680 times
2008-12-01 EDIS 006.jpg
2008-12-01 EDIS 006.jpg (140.43 KiB) Viewed 12681 times
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Dean

alexander
Posts: 246
Joined: Sat Jan 19, 2008 4:33 am
Location: sydney, australia.

Post by alexander »

hi dean, good to see another one running!, and your updates have been most entertaining.

i would, however, like to urge in the strongest way, that you make a cover for the trigger wheel.
having a gear wheel spinning around like that at the top of the motor is a serious injury risk,
both from touching it, or getting stray wires caught in it eg timing light test leads, for example.

as you have those two mounting bolts sticking out a bit, it would be dead simple to make a
cover to slip over them, with a couple of spacers to hold it close to, but just away from the wheel.

someone's fingers, likely your own, will thank you for it someday by remaining attached to their hand.

regards
alexander.

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