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Messages - ZLP955

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1
Originality / Re: 1969 Small Block Smog Pump Cradle
« on: May 25, 2018, 09:12:22 PM »
Interesting - maybe different suppliers?
Great pictures thanks Bentley!

2
Originality / Re: 1969 Small Block Smog Pump Cradle
« on: May 25, 2018, 10:43:27 AM »
Thanks Bentley, that'd be a great reference - right timeframe too, my car is early April!

3
Originality / Re: 1969 Small Block Smog Pump Cradle
« on: May 24, 2018, 08:41:02 PM »
Thanks Austin

4
Originality / 1969 Small Block Smog Pump Cradle
« on: May 24, 2018, 12:31:50 PM »
I've been looking for an assembly-line correct smog pump cradle (the lower bracket) for a '69 small block.
Several I've looked at have either one or two small holes in the main flat part of the bracket, directly under where the long bolt passes through the pump casing - similar to the attached reference picture. One bracket I looked at had no holes, but the captive nut was hex rather than square, so I suspected it was a reproduction or service replacement.
I have been told that the correct-for '69 brackets were unique to that year, and only had one hole, but can't find any confirmation of that.
Can anyone confirm if an assembly-line correct bracket should have any additional holes as described,  and if so, one or two? or if there are any other markings or features to look out for? Thanks!

5
Originality / Re: Smog Pump Spacer Usage
« on: May 22, 2018, 07:18:30 AM »
Thanks for the pictures - the bolts I bought are exactly like the loose one next to the spacer in Steve's photo - longer and with an unthreaded section of shank. Good to see the correct short ones, so at least I know what I need now.

6
General Discussion / Re: Tachometers
« on: May 21, 2018, 08:48:53 PM »
Thanks William - any data on the OP's timeframe of late August through to November though? Wonder how the suppliers and Chevrolet handled documenting the change if another tach was used.....

7
Originality / Re: Smog Pump Spacer Usage
« on: May 21, 2018, 08:44:49 PM »
Thanks!

8
General Discussion / Re: Tachometers
« on: May 21, 2018, 06:26:20 AM »
Does the database capture the tachometer details (if fitted), and if so, how many late production cars have a non-normative unit?

9
Originality / Re: Smog Pump Spacer Usage
« on: May 21, 2018, 06:16:19 AM »
Thanks Kurt, I read that report many times but didn't see any reference to spacers.
The bolts I bought to mount the pulley are too long and I wondered if a spacer was required. Looks like I need shorter bolts then.

10
General Discussion / Re: Tachometers
« on: May 20, 2018, 07:54:14 AM »
August 29 of 1968 would be very early production, although I recall reading 9N500003 is in the DB and is a Z/28.

11
General Discussion / Re: Tachometers
« on: May 20, 2018, 04:27:25 AM »
Unless there was an intermittent shortage of the correct redline tach from AC, which is improbable from late August to November 1969, then both tachs have likely been replaced.

12
Originality / Re: Original Born with Battery Trays LOS NOR
« on: May 19, 2018, 10:29:19 PM »
Looks great Lloyd, as always. Are you enjoying this project as a full restoration, rather than detailing and preserving a survivor?

13
Originality / Smog Pump Spacer Usage
« on: May 19, 2018, 07:23:49 AM »
Did any '69 models use a spacer between the smog pump pulley and the white fan, or did all pulleys bolt right up to the fan? I've seen the spacers used on Corvette and others, but so far, not on a first-gen. Thanks!

14
Originality / Re: A Brace of Z10's on eBay
« on: May 17, 2018, 10:31:06 AM »
What's that thing mounted on the subframe (last picture in the auction)?
It has a removable safety pin & clip, so presumably something can attach there..... maybe for a jack, or winch/tow point? Never seen one before.

15
Maintenance / Re: Ignition Coil Bench Test
« on: May 12, 2018, 11:22:50 PM »
No expert but would think that'd be fine, from my research the resistance of the secondary winding is more important to getting a consistent good spark at the high-tension post. Another thing to watch is some digital multimeters have a base resistance (either internally or on the test leads) that needs to be deducted from the readout when on the coil terminals - if you touch the red and black probes together and get anything over 0.0 on the display, subtract that from the readings at the coil terminals. Also make sure there is good contact to the coil terminals, any traces of oil or even light corrosion can affect the accuracy of the readings.

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