Messages

61

1969 - Orphans / '69 DZ engine: V0725DZ - 19N688280 (last 2 numbers are ??)

« on: December 28, 2018, 07:26:31 PM »

This fresh engine is in our '69 X33D80 VIN#124379N658489. Heads are 186's dated Dec 1 '68 and Dec 2 '68.

Will consider swap out of block and heads for late May - early June (prior to 6/16 assembly) block and heads in similar condition.

62

Maintenance / Voltage at the coil

« on: December 28, 2018, 06:33:55 PM »

Bear with me for a second:

I just replaced an off-brand distributor with an MSD 8360 Pro Billet (their ready-to-run version which does not require the box). In checking for voltage at the coil I found 12v at positive side of the coil with the ignition switch in RUN... and 9 volts at start...just the reverse of what should be in place for a points-style original distributor. The MSD needs 12v at RUN.

I haven't pulled the harness nor separated the wiring (yellow and wrapped white?) yet and am wondering how the previous owner could have wired this thing backwards.

As I intend to install an original 480 distributor in the very near future resolving this issue is important.

paul

63

Maintenance / Re: Power Valve on the 4053 Secondaries

« on: December 21, 2018, 07:58:22 PM »

I am at a loss as to why the PO of this car ran 3/8" inlets...but he did. Am still trying to figure out which application has a 3/8" Yblock.



paul

64

Maintenance / Re: Power Valve on the 4053 Secondaries

« on: December 14, 2018, 05:58:33 PM »

To be "correct" I guess I should step down the lines from the Y block....Nah, I'll keep the 3/8".

paul

65

Maintenance / Re: Power Valve on the 4053 Secondaries

« on: December 13, 2018, 03:28:41 PM »

Our Holley 4053 repro carb showed up yesterday: jetted 68 primary; 76 secondary; 6.5PV primary; 8.5PV secondary. I haven't opened up the secondary vacuum can to check the spring. I did find that the inlets are for 5/16" lines and fittings. I switched out the 3/8" inlets from the current Street Avenger. Were the original fuel lines 5/16"?

Thanks

paul

66

Maintenance / Re: Power Valve on the 4053 Secondaries

« on: December 12, 2018, 09:03:23 PM »

I'm at sea level. Current Street Avenger Holley has a 6.5PV on primary with 70's; 78's on secondaries. Plugs clean and milk chocolate.

What would you suggest be the starting points with the 4053?

Stock Z intake; stock exhaust manifolds; chambered exhaust; cold lash at .026; 16* initial 36*total at 2200; 19*vacuum; RJ127C's at .040. Stock 11-1 and std. bore (to my knowledge).

paul

67

Maintenance / Power Valve on the 4053 Secondaries

« on: December 12, 2018, 02:57:30 PM »

Is that PV absolutely necessary or have others plugged it?

68

General Discussion / Re: Anybody heard of Bill Thomas built cars? I love the bench seat deluxe interior

« on: November 30, 2018, 08:59:31 PM »

Wasn't Bill Thomas one of the early vendors who supplied the Z28's headers to GM?

69

Trans-Am Camaros / Re: Unusual valve covers and intake ??

« on: November 28, 2018, 06:24:08 PM »

It appears that the valve covers have been swapped from side to side....to clear the intake it would seem.

They resemble slightly the GMPP covers on my old '56:



paul