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#1
08-23-2016, 01:42 AM
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6K/8K Tach
Is this the correct tach for a late production Z28/L78/L72 car?
When was the change date from the 6K/7K tachs? Thank you in advance for your replies. 
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#2
08-23-2016, 01:53 AM
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Re: 6K/8K Tach
6,000 - 8,000 is 'mid to late' (from http://www.camaros.org/interior.shtml#69Z28Tach).
Not sure when the change in upper rpm redline from 7,000 to 8,000 occurred, but I have Jan/Feb in mind.
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Tim in NSW, Australia 1969 Van Nuys 04A Z/28 from Clippinger Chevrolet. Cortez Silver with dark blue interior. Ran at Lions Dragstrip and Pomona Raceway, with paint by Bob Kovacs of Fresno.
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#4
08-23-2016, 12:44 PM
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Re: 6K/8K Tach
AFAIK, the 6k/8k tach was also used on the solid lifter BB engines as well as the Z/28. I looked up the number on the rear of your tach and the February 1969 P&A Catalog lists 6469780 under 9.750 Tachometer Assembly as:
'69 CAMARO w/console gauges, speed warning (302)' So, if I read that correctly, the tach you pictured is Z/28-specific, although I believe that the original assembly would have included the harness, filter etc, so the difference between it (6469780) and the non-speed warning Z/28 and L78 version (6469383) may lie there, the assembly, rather than in the tach head itself.......
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Tim in NSW, Australia 1969 Van Nuys 04A Z/28 from Clippinger Chevrolet. Cortez Silver with dark blue interior. Ran at Lions Dragstrip and Pomona Raceway, with paint by Bob Kovacs of Fresno.
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#5
08-23-2016, 03:01 PM
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Re: 6K/8K Tach
The 8000 rpm tach was Z/28 only and entered production early February 1969. It was phased in; at the time some cars were built with the 6000/7000 rpm tach. A very few later production Z/28s had an 8000 rpm tach with a 6500 rpm red line.
Mechanical lifter big blocks used the 6000/7000 rpm tach.
__________________
Learning more and more about less and less...
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#6
08-23-2016, 07:16 PM
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Re: 6K/8K Tach
For whatever reason, the L72/L78 Camaro used 6K/7K tach throughout the entire production year, including the "extended model year" I would love to know the reason; seems like extra inventory item to me.
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#7
08-23-2016, 09:16 PM
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Re: 6K/8K Tach
In stock form none of those engines would reach 8,000 rpm more than once. Chalk it up to marketing.
__________________
Learning more and more about less and less...
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#8
08-23-2016, 09:23 PM
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Re: 6K/8K Tach
My 05E Z has a 6 / 8 k red line and my 11 A of 69 has the same you don't get any later than this car so I would say they didn't have a 6500 to 8 k tack
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#9
08-23-2016, 09:51 PM
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Re: 6K/8K Tach
The 6500/8000 rpm indeed does exist; I have seen several. They are very rare and not all late builds have it. Earliest one in the CRG db is N709xxx.
__________________
Learning more and more about less and less...
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