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Pat i had my sc distributor converted to 12 plug and have a boost retard MSD but dont use the retard
function at all. I had my timing set at 26 at 4500 and all has been fine. I still think the simplest thing for you to do is sell off the BAE stuff and SS box, install a 930 intake and some boost tolerant pistons and cylinders run .8 bar and be happy, happy , happy.....
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Old 11-12-2008, 05:48 AM
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Chappy,
At the moment, I am looking at cost avoidance. Otherwise, I agree with what you suggest. I would probably be pretty happy with a 3.0 with PMO's and Mod-S cams, and great throttle response acroos the rev range, but I'm trying to be low budget. I'm going to go with the JE pistons, maybe a bit less than the 8.5:1, and run what I have.

Did you get your distributor recurved when you converted to a dozen spark plugs? I'm pretty sure I was running around 27 degrees total, which all came in around 3000 RPM, so it was pretty much stock SC timing. The SC likes the advance up to 3k.

Pat
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Old 11-12-2008, 07:32 AM
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problem with adding a distributor that rotates the opposite way is. While the gear can be changed to the engine you have, it will rotate in the wrong direction causing the timing to automatically retard the full amount the dizzy is designed to advance. The only way it would work is if the crank drive gear was changed out also so it would turn in the right direction.
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Old 11-12-2008, 07:35 AM
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Yep. I forgot about that.

Quote:
problem with adding a distributor that rotates the opposite way is. While the gear can be changed to the engine you have, it will rotate in the wrong direction causing the timing to automatically retard the full amount the dizzy is designed to advance. The only way it would work is if the crank drive gear was changed out also so it would turn in the right direction.
Old 11-12-2008, 12:29 PM
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Yup, crank gear needs to be changed to a 930 gear. Don't know if it's worth the trouble with all of the electronic boost retard devices available. But, it's easy enought to do now while it's apart.
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Old 11-12-2008, 02:26 PM
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Quote:
Originally Posted by GJF View Post
problem with adding a distributor that rotates the opposite way is.
Agreed. But am I missing something? I thought the SC and the 930 both rotated the same way - e.g. CCW - and it was the 3.2 that rotated CW?
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Old 11-16-2008, 02:38 PM
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Spuggy:
I may be the one who is missing something. I'm pretty sure my distributor rotates CCW looking down at it. Which way does the 930 rotate?
Anyway, I think I can just put the advance retard mechanism on my distributor and replace the strictly vacuum unit. I'll go out in the garage in a while and take a look at it.
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Old 11-16-2008, 02:59 PM
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Quote:
Originally Posted by patkeefe View Post
Spuggy:
I may be the one who is missing something. I'm pretty sure my distributor rotates CCW looking down at it. Which way does the 930 rotate?
Anyway, I think I can just put the advance retard mechanism on my distributor and replace the strictly vacuum unit. I'll go out in the garage in a while and take a look at it.
I think 81 turbo and up rotate the same as the sc it could even be as far back as 78 but I know that 76-77 are the oposite.
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Old 11-16-2008, 03:09 PM
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I think 81 turbo and up rotate the same as the sc it could even be as far back as 78 but I know that 76-77 are the oposite.
Interesting! Another wrinkle, never realized the 3.0 930's were different...

I have an '86 distributor in my '78 right now. I thought all the 3.3's were the same.
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Old 11-16-2008, 04:27 PM
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911 (1965-1977) turn CW
911 SC's (1978-1983) turn CCW
911 turbo's (1978-1989) turn CCW
911 (1984-1989) turn CW
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Twin Garrett's, Big Valve, Xtreme Cylinder Heads, JB Racing cylinders and machine work, custom JE pistons, GT2 EVO cams, GT3 oil pump, modified 3.2L intake, 80mm TB, custom Intercooler, equal length headers, DFI, KEP Stage 2 custom twin disc, G50 custom gear set, LSD, Tilton trans pump, Fluidyne cooler
Old 11-20-2008, 08:10 AM
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Add to your list:
911 turbo's (1991-1994) turn CW.

Thanks,
Mark
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Old 11-20-2008, 09:25 AM
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Thanks! At least I don't have to change the gear.
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RIP, Early_S_Man & RoninLB
Old 11-20-2008, 01:20 PM
  Pelican Parts Technical Article Directory    Reply With Quote #52 (permalink)
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