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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-23-2008, 03:09 AM   #1
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Default I think this is good news.

I finally got around to spending 2 nights after 14 hr shifts to get this new tach installed. I would have never been able to do it if I hadnt snagged a FSM frm ebay. Whoo-hoo! This is what I am getting frm it.

This first pic is at idle in park.

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This one is at 60mph.

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Note the difference in the 2 tachs. I new the stock one wasn't correct, but I didn't realize how off it was. Both are getting signal frm the same wire. The shifts pts are approx. 1-2 @ 1000-1200 rpms, 2-3 @ 2000-2500 rpms, 3-4 @2500 rpms.

If this info is correct then I can move on to the cosmetic work on the old girl. Does anyone think this pics make sense?
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Old 04-23-2008, 03:17 AM   #2
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that is good news, the original tach is definitely off, lol.
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Old 04-23-2008, 09:55 AM   #3
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I would get a JY cluster and put it in. Your volts seem way low for 60 mph. Oil pressure is just where mine runs on the highway with the goofy sending unit.
I envy the full tank of gas.....Ha
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Old 04-23-2008, 02:15 PM   #4
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looking for cluster already, the alt is only a yr old, but I'll have the advance guys ck it out and the tank only gets filled up maybe twice a month but thanks.
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