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08-05-2015, 12:32 PM | #1 |
Registered User
Join Date: Apr 2002
Location: Manitoba, Canada
Posts: 663
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Inline 6 Question: AIR vs. Non-Air Timing
Having a tough time setting the timing for my '69/L6/manual. The truck came from the factory with the AIR pollution control. I've removed the AIR system, mostly to install a different alternator.
Anyway, the timing sticker states that timing should be set at 0 degrees. If I look in the shop manual it says that trucks with the AIR pollution control should be set at 0 degrees and trucks without it should be set at 4 degrees BTDC. Having removed the AIR pump, should I stick with the 0 degrees recommendation or go with 4 BTDC?
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Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said. |
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