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Need Advise on MSD6AL2 install

Well it is almost time to install the MSD. But before I do, I have a few questions for others here who have already gone through this on their 930's. Mine is an 87 bone stock and I wish to keep it close to stock or easily revert to stock. I will adapt the msd wiring harness to plug into the original harness. My question has to do with the MAP sensor where is the best place to pick up manifold pressure?
any advice based on your experiences would be greatly appreciated.

TIA
Mike
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87 930 turbo coupe 3.3L , 4Spd 930 Trans w/LSD , mostly stock for now
Old 04-26-2014, 10:45 AM
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I T'd mine off the same line as the boost recirc valve.
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Old 04-26-2014, 08:14 PM
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Same here. Tee from the Boost recirc valve. You want it to see boost and vacuum
Old 04-28-2014, 07:24 AM
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how about any suggestions on spark plug gap?

I've read that most suggest to open 'em up a bit when going to MSD

my MSD's 1/2 in & my plugs are all out and ready to go - so the timing of this thread is perfect... thanks... now know where to T in for my MAP sensor 8-)

Bueller?
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Paul... CT | '87 930 | '08 M3 6gang vert |
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| '07 S6 | '98 M3 vert | '01 M5 | '96 993 C2 cab | '05 S600 Sport - biturbo V12@Just Not Right 495rwhp / 612rwtq |
| '58 TR3A | '01 S8 | '95 S6 6gang | '88 M5 | '87 190E 2.3-16 |
Old 04-28-2014, 08:40 AM
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Quote:
Originally Posted by krasuskyp View Post
how about any suggestions on spark plug gap?

I've read that most suggest to open 'em up a bit when going to MSD

my MSD's 1/2 in & my plugs are all out and ready to go - so the timing of this thread is perfect... thanks... now know where to T in for my MAP sensor 8-)

Bueller?
I ran with a .040 gap and NGK "race" plugs. Ran fine all the way up through full tilt boogie...though I do remember hearing of some people having problems with that large a gap. Probably some trial and error involved.
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Old 04-28-2014, 09:00 AM
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I could not get 0.040 to run at high boost.

I was getting flame out until I dropped the gap to 0.028". I did it progressively through the 0.030's but kept having trouble above 0.7bar until I ran the gap down to under 0.030".

Let us know what you wind up with.

Fred
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Old 04-28-2014, 09:18 AM
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when you wire the MSd to the dist, the violet wire goes to the braid and the green wire goes to the center conductor.
i too wanted to keep mine original or so it could be put back to original, if nto, then i wanted it to look factory.

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88 BMW 325is 200K+ SOLD
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Old 04-28-2014, 09:20 AM
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I never changed my plug gap and run great.
Old 04-28-2014, 09:40 AM
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Excellent all of the advice is perfectly timed for my install thanks for the tips on plugs & gaps and wiring to the dizzy. on the sparkplugs I take it the stock plugs cannot be used?

believe it or not I do search the forum and have found many threads that discuss this install, but for all the advise other questions arise out of difficulties during and after install. I wanted to used the MSD as a straight replacement for the stock cdi box.
I did not want to alter my dizzy as it is new. I want to see how it runs first before attempting to lockout a second dizzy I have on hand to experiment with mapping the timing.

Thanks I will post pics when I am doing the install My new dizzy should be here in a week.

Mike
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Last edited by mdripley; 04-29-2014 at 04:57 PM..
Old 04-28-2014, 10:11 AM
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PS this forum is the greatest place to go for advise. I wish to thank all of you for the help given on this forum you guys are the greatest Bar None

Mike
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Old 04-28-2014, 10:39 AM
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thanks Fred / T77911S - those are helpful replies!

Mike... I too am initially only swapping just the boxes and deferring dizzy lock until I get the car running, etc. (my motor's out from cam & turbo swap).

Can't add toooo many variables to the mix...
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| '07 S6 | '98 M3 vert | '01 M5 | '96 993 C2 cab | '05 S600 Sport - biturbo V12@Just Not Right 495rwhp / 612rwtq |
| '58 TR3A | '01 S8 | '95 S6 6gang | '88 M5 | '87 190E 2.3-16 |
Old 04-28-2014, 11:21 AM
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Exactly what I was thinking keep it simple go slow until she's running.

Mike
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Old 04-29-2014, 04:59 AM
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mine is not locked. when it comes to timing/advance, unless you have a dyno to set it up, its better to just use the stock dist timing.

you can see the connector i used to connect to the original harness. i am not thrilled with that connector. it is very hard to line up the pins to connect it up.

bosch CS plugs W4 are good, i have the NGK coppers in now. BP8. i think iwould try a 9. i need to recheck after gettting some air leaks fixed.
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86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [__] RUNNING: [__] NOT RUNNING:
90 B2200[__] RUNNING:[] NOT RUNNING:__2000 MER E320 WAGON [] WRECKED:[]RUNNING:
Old 04-29-2014, 09:14 AM
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I am going to make an adapter plate to mount the msd in the location of the original CDI box. One of the guys on the forum posted a template of an adapter plate he made with all of the dimensional info for fabbing one up. I got a lot of aviation metal working tools available to fab one up. My understanding Is, and feel free to correct me if I am wrong is to not program the MSD or zero out the program to have it function as a replacement to the original CDI box with a working unmodified stock distributor.

Regards
Mike
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Last edited by mdripley; 04-30-2014 at 06:27 PM..
Old 04-30-2014, 06:24 PM
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You can lock out the distributor with a locking plate, that way you can always go back to stock.

MSD 6AL-2 Digital Programable Install and Distributor Lockout
Old 04-30-2014, 11:35 PM
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Quote:
Originally Posted by mdripley View Post
I am going to make an adapter plate to mount the msd in the location of the original CDI box. One of the guys on the forum posted a template of an adapter plate he made with all of the dimensional info for fabbing one up. I got a lot of aviation metal working tools available to fab one up. My understanding Is, and feel free to correct me if I am wrong is to not program the MSD or zero out the program to have it function as a replacement to the original CDI box with a working unmodified stock distributor.

Regards
Mike
Right, you still have to set the program for 6 cylinders, but I believe in the default configuration that the program is set to not pull any timing out.
Old 04-30-2014, 11:40 PM
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Thank you Shane for the info and the link you provided

Mike
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Old 05-01-2014, 07:13 PM
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