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Registered
Join Date: Nov 2019
Location: Central Connecticut
Posts: 545
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Distributor id question
I have a 76 row turbo the motor came with two distributors a much newer looking one in a box Bosch part # 0 237 301 001and one not so new one on the motor Bosch # 0 237 301 002... Can someone explain the difference between the two? I'm guessing one is a row and the other for the American bound cars....also is there any reason to use one over the other?
Thanks on advance Regards Ned Last edited by gorskined; 11-29-2023 at 02:40 PM.. Reason: Spelling |
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11-28-2023, 03:04 PM
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Registered
Join Date: Nov 2019
Location: Central Connecticut
Posts: 545
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On one other note as mentioned my car is a Row I believe I'm using the American distributor. I have never tried the one that was originally in the car but I did notice the high speed advance with the American distributor was just a few degrees short of the factors mark on the crank pulley.... Not sure if the American and row have the same advance....
Thanks Last edited by gorskined; 11-29-2023 at 02:42 PM.. |
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11-29-2023, 02:38 PM
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Registered
Join Date: Oct 2005
Location: sf bay
Posts: 55
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I have an American 76 930, made for California, and the distributor number is 0237301001. The idle timing is 4 degree after TDC and it has always hit the full advance mark on the pulley. After 325,000 miles I just had it rebuilt and it still hits the mark.
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11-29-2023, 03:47 PM
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Registered
Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 4,184
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Quote:
 On my '78 930/60, I had, at different times, both distributors fitted. And knock sensing. Not only was factory US timing spec lower by a few degrees, advance curve for the RoW distributor was obviously more aggressive - based on how it lit up knock detection earlier/longer in certain very specific conditions (climbing a hill, under 3500 RPM). Then one day the US distributor advanced plate stuck fully advanced, and only the Safeguard was preventing detonation: My J&S Safeguard paid for itself last week... Put the (original) RoW distributor back on. And later timed it more advanced, allowing the Safeguard to control knock (and also bleed off added timing as boost came up). Made a substantial difference to the way the car drove and responded out of boost - but to my surprise, it only ever detected knock climbing hills off-boost - and it did that with factory timing too, just less of it. Either distributor knocked with RoW timing; little pock marks in the carbon/shiny metal underneath in the combustion chamber telling the tale. None of those on subsequent disassembly after the Safeguard was fitted, even with advance set to 35 degrees @ 4000 RPM..
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'77 S with '78 930 power and a few other things. |
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12-01-2023, 10:49 AM
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Registered
Join Date: Nov 2019
Location: Central Connecticut
Posts: 545
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So i found some interesting info on the two distributors.
0 237 301 001 USA 5deg +-3 ATDC at 900-1000rpms........... 26+-3deg BTDC @4000rpms 0 237 301 002 ROW TDC+-4 at 900to 950 rpms .................29+-2 deg BTDC @4000rpms just wondering why the difference in the settings the motor is basically the same minus the emissions junk. i don't really understand the entire distributor curve thing, i have yet to try setting the USA distributor to TDB an an idle so im a little confused the Wayne Dempsey book I'm referencing shows a few cars at an idle being set to TDC +- and it also shows some cars being set to 0DEg +- isn't tdc and 0 deg the same thing ??? |
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12-05-2023, 08:58 AM
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