Messages

1

Decoding/Numbers / Re: RPO MA6

« on: July 02, 2011, 03:24:15 AM »

Read here http://www.yearone.com/enthusiast/restoarchives/summer96/sum96best-kept-secrets/camaro.htm

Production totals for MA6 in a Camaro was the big zero. Engine build records confirm it.

Engine suffix codes reserved for use with MA6 heavy-duty clutch (none known to have been produced)...

L48 - HP
L35 - JU
L34 - KA
L78 - KC
L89 - KE

Paul
 

2

Originality / Re: 1111480 Looking for Collaborative Facts.

« on: July 01, 2011, 02:14:11 PM »

Look at the top of the 480 advance plate where it is fused on to the points cam. The there should be 3 half moon notches equally spaced at 120 deg around the inner radius  of the plates stamped out hole. The plates from the 1111955 532"s just have a round hole, no notches.

I don't have a sun machine but was told the slot was intentionally manufactured wider because of the 3030 Camshaft needs this extra advance at idle to run smooth and allow a better transitional response from Vacuum to Mechanical advance which happens the micro-second the gas pedal is pressed and vacuum goes to zero your on mechanical advance.

Haven't found one to inspect but also heard the Corvettes with the 3030 cam and Delco Transistorized have the same sized slot.

Whats the stamped number on the bottom of the little cam (autocam) attached to the rotor shaft?

3

Restoration / Re: 69 Low Fuel Light

« on: June 30, 2011, 07:01:09 PM »

Resistor Values:
  0   ohms = MT tank.
45   ohms = Warning (general area of alarm with “GM original” Low Fuel Sensor).
90^ ohms = Full tank.

4

Originality / Re: Correct Belts (engine compartment)

« on: June 30, 2011, 02:15:32 PM »

Ribbed is correct. Ricks Camaro's or any NAPA auto parts.
Ribbed belts generate less friction and heat on the smaller diameter pulleys because of the notched area allowing flex compression.
Smooth belts compress on the inner radius of small pulleys and the narrow side actually bunches up to generate heat and eventual fatigue.
They are better suited for industrial applications but were used on much older cars too.

5

Originality / Re: 1111480 Looking for Collaborative Facts.

« on: June 29, 2011, 11:05:32 PM »

Hi L78 Steve,

I’m absolutely sure, I have several 532’s and an original 1111480. I’ve had the car since 1977 second owner.
I used body Bondo to cast and image of the Advance Plate Limit Stop Slot holes and colored them with a black marker and scanned them.
Not only is the 1111480 532 CCW slot longer and wider, but it is located in a different position in comparison to the 1111955 532CCW and many other Delco distributors.

6

Originality / 1111480 Looking for Collaborative Facts.

« on: June 29, 2011, 04:37:45 AM »

I'm looking for photos of an unadulterated non-eBay 1111480 distributors in particular the;

1. 532 advance camplates
2. The number stamped on the rotor autocam

I know there were are two 532 advance camplates for the 1969 period however the one used on the 1111480 is different in that the advance plate limit stop slot is much longer for the Z28 in comparison to the 532 used in the 11111955 distributor.