6K/8K Tach

[69L72RS]

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.

[ZLP955]

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.

[69L72RS]

Thank you.
Is this a Z only tach, or would it have also been used in the L78/L72 cars?

[ZLP955]

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.......

[William]

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.

[Unreal]

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.

[William]

In stock form none of those engines would reach 8,000 rpm more than once. Chalk it up to marketing.

[jl8z28]

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

[William]

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.

[William]

Car was on ebay a few weeks ago.

http://www.yenko.net/ubbthreads/pics/usergals/2016/08/full-233-48046-late_z_tach.jpg

[jl8z28]

Here's the one in mine N 708 http://www.yenko.net/ubbthreads/pics/usergals/2016/08/full-1102-48047-imag0899.jpg

[ZLP955]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: William</div><div class="ubbcode-body">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. </div></div>
Thanks for the correction William. It's curious though that both the February 69 and October 70 P&amp;A Catalogs call up the same tach assembly number (6469383) for 'Sp. H/Per (302,396)' applications. So does this suggest that the same assembly number (6469383) was used for both the 6k/7k and 6k/8k tach heads, as there is no apparent change between the Feb 69 and Oct 70 catalog listings?

[William]

Service parts often don't exactly match production. Fit &amp; function, not appearance, is the over-riding criteria. No telling what they would have shipped if you ordered that part number. Maybe a 6/7, maybe a 6/8. I was a service parts analyst in the industry. Electronic components sometimes vary only in appearance. A supplier often dictates what you can do; they aren't going to maintain parts, production tooling &amp; fixturing indefinitely after a part is no longer used in production. So you pick one version and do a &quot;life of part&quot; buy to cover the anticipated service life of the vehicle.

There is pressure from management to limit obsolete stock at the end of a production run. A family member is the original owner of a very late production '69 Camaro SS L35/4-speed. Built with a 6000/7000 tach. Should have had a 5500/7000; probably ran out.

[Billohio]

I saw the ebay one in person. Best part on that car! Neat to see

[enio45]

my late 69 car - 10D had the 6500 red line

[Zman1969]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: William</div><div class="ubbcode-body">Car was on ebay a few weeks ago.

http://www.yenko.net/ubbthreads/pics/usergals/2016/08/full-233-48046-late_z_tach.jpg
</div></div>
I had heard about the 6,500 redline but this is the first I have seen both my Z's were Sept 69 builds and both 6/8 thanks for sharing

[69L72RS]

Thank you for all of the replies.
I have yet to find a question that could not be answered here. <<GRAEMLIN_URL>>/youguysrock.gif