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Join Date: May 2004
Location: San Antonio, TX
Posts: 2,466
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Why does my 930 have an SC distributor?
My car is in the shop having a few issues dealt with. My mechanic calls me today and asks me if I knew my '79 930 had a SC distributor on it... I did not.
Anyone venture a guess why a previous owner would have done this modification? Should I switch back to a 930 disty? My mechanic is researching why this might have been done, but I thought I'd ping the board to see if anyone might know... Thanks, Skip
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1972 911T 1972 911E "RSR" |
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05-31-2005, 04:30 PM
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Location: Laguna Beach, CA
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Only thing that matters is the ignition curve. Many old cars may have the correct dist internals in the wrong case. The part number on the dist case means nothing.
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68 911L |
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05-31-2005, 05:09 PM
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BD- Good point. But, I think my mechanic believes the curve is wrong... that's how he noticed the distributor was from a 930. I think he said the timing doesn't retard while on boost. But, I am flaunting my ignorance now.
 Also, I should have stated that I've owned the car since it had 19K miles (currently 26K). I can't imagine needing to replace a distributor (with the correct/same internals) with so little wear. Or, am I missing something? Thanks, Skip
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1972 911T 1972 911E "RSR" |
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05-31-2005, 05:17 PM
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Location: a wretched hive of scum and villainy
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maybe the previous owner has some work done at Motormeister
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05-31-2005, 05:53 PM
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Location: Charleston, SC
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A '79 with 26,000, I do believe you should let me put some miles on the clock to make sure no other parts in question. Just an offer.
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Kevin '79 Coupe |
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05-31-2005, 06:00 PM
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Location: MA USA
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A stock 930 dist doesn't retard on boost. It retards on vacume. So I am guessing that you have the correct dist. You might need a new mechanic though.
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Dean 911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno, |
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05-31-2005, 06:22 PM
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Location: San Antonio, TX
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Quote:
Timing and ignition is a big fat freakin mystery to me. I understand conceptually how energy gets to the plugs, and how the energy is created and what the energy is used for (spark) - but past that...  Thanks for the clarification. - Skip
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1972 911T 1972 911E "RSR" |
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06-01-2005, 06:26 AM
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Quote:
I'm working on it... It's been moved to daily driver status...
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06-01-2005, 06:27 AM
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