a few upgrades for the 968.... - Page 37 - Rennlist - Porsche Discussion Forums

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a few upgrades for the 968....

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Old 12-06-2017, 09:42 PM
  #541
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Old 12-17-2017, 02:46 PM
  #542
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Old 12-17-2017, 03:47 PM
  #543
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In the time after swapping to the high output pump, the problem of too much switched current, re; the ignition switching on the combined [computer + fuel pump circuit] eventually stressed the electrical box to the point of internal arcing and subsequent relay failure.... the result, (a common problem with early Chevy efi systems), produces a result quite similar to our DME relay issues.... I went about searching the internet and found where to check for a burnt relay... opened the computer hatch and found the suspect relay was clearly 'burnt'.... The events that brought this discovery proved yet again, that a good amateur mechanic like Doug Bray can keep this beast running indefinitely.... i didn't want to go near it, but Doug went straight to work......

By re-routing the fuel pump circuit and simply running a pigtail off the ignition wire into a new, dedicated relay box, and by changing the oem 14 (or 16) gauge wire to #10 wire, the high amps/high heat running on 1 circuit is now distributed to 2 low amps/low heat circuits.... Now my computer is running cool, and with plenty of juice.... With about 4 hous of work, Doug ascended to legend status... because not only do i have a perfectly running engine with just the single turn of the key, but this relatively easy upgrade can be done for the 944/968's running the oem engines. .... re; no more DME relay issues.....

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Old 12-22-2017, 04:14 PM
  #544
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"i need a car, Bob.... i need a car......."

https://youtu.be/vayVEcfv3nM?t=680


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