67 tach question

[Mark U.]

my tach has a red line of 6300 rpm-my car came with a 427-390hp engine and powerglide trans.I thought the redline was different for this car?

[Robert G.]

Re: 67 tach question

Yellow line should start at 5700 rpm, red should start at 6000 and end at 6200- at least for manual trans. This 427/390 automatic says it was top flighted, so I'm guessing it's the same for auto. I've never heard of a 6300 redline.

http://cgi.ebay.com/ebaymotors/1967-CHEVROLET-CORVETTE-427-390-A-C-NCRS-TOP-FLIGHTED-/330542249715?pt=US_Cars_Trucks&hash=item4cf5da76f3

[Mark U.]

Re: 67 tach question

my tach starts at 6300 yellow and red lines starts at 6500 ends 7000
this car also has a 80lb oil pressure gauge
checked the tank sticker and its a l 36 and m35 trans
Any ideas?

axle posi track
775x15 4 ply tires

[John H.]

Re: 67 tach question

my tach starts at 6300 yellow and red lines starts at 6500 ends 7000
this car also has a 80lb oil pressure gauge
checked the tank sticker and its a l 36 and m35 trans
Any ideas?

Mark -

Tach has been changed; the one you describe was only used on L-71's, L-89's, and L-88's.

[Richard M.]

Re: 67 tach question

Hmmm, with the 80 lb oil pressure gauge, it may be that the entire instrument cluster was changed.....?

There is a white label with red letters on the backside of the cluster, about 3"W x 1-1/2"H with a 2 letter designation in large font then smaller font description. The cluster pictured from a L71 435HP has the 6500 RPM tach and 80 lb oil gauge.

"LB" is for L71 and other solid lifter engines which use the 6500 tach & 80 lb oil gauge. I'm told "LA" is for standard tach and 60lb gauge. I am told "LC" is another code but I am unsure of it's application. Maybe speed warning buzzer option?

The rear speedo/tach cover also has a date code. It may tell you if there is a major delta between car build and cluster build.

Rich

[Stephen L.]

Re: 67 tach question

This is a cluster sticker "LC" for a 427/390 NO speed warning option. Red lettering. Its for an April 10 build date coupe. 60# oil pressure.
LA = base engine
LB = L71 L88
LC = L36 L79 L68

I don't know the designations for "Speed Warning Option" I believe the tag will be green lettering.

[Ray G.]

Re: 67 tach question

From an early licorvette catalog.

RED LA 5300 60 300 #6457982
RED LC 6000 60 350 #6457985
RED LC 6000 60 390 #6457985
RED LC 6000 60 400 #6457985
RED LB 6500 80 430 #6455364
RED LB 6500 80 435 #6455364
GREEN LG 5500 60 300 SPEED WARNING #6458840
GREEN ?? 6000 60 350 SPEED WARNING #6459496
GREEN ?? 6000 60 390 SPEED WARNING #6459496
GREEN ?? 6000 60 400 SPEED WARNING #6459496
GREEN ?? 6500 80 430 SPEED WARNING #6459495
GREEN ?? 6500 80 435 SPEED WARNING #6459495

[Richard M.]

Re: 67 tach question

Stephen, Coincidentally that cluster was dated 44 years ago yesterday.

Ray, Too bad the latest catalog doesn't have that info, at least not apparent when I looked.

Rich
p.s. Good info in this thread. I remember searching for this reference material 5 months ago and couldn't find it in the archives.

[Stephen L.]

Re: 67 tach question

Anybody out there that has a 67 speed warning option cluster that would post the cluster sticker data along with engine type???

[Michael H.]

Re: 67 tach question

my tach starts at 6300 yellow and red lines starts at 6500 ends 7000
this car also has a 80lb oil pressure gauge
checked the tank sticker and its a l 36 and m35 trans
Any ideas?

axle posi track
775x15 4 ply tires

Mark,

If you have a 66, the 80lb oil pressure gauge would be correct with a 390 HP. For 67 with 390 HP, the gauge would be a 60lb.

As mentioned, your tachometer is incorrect for a 390 HP though.