Author Topic: 1970 Eldorado 500 timing  (Read 1515 times)

1970 Eldorado 500 timing
« on: April 20, 2009, 06:31:02 PM »
Can anyone tell me what the correct timing is on a 1970 Eldorado 500cu engine?

Thanks,

George
George D. Mukalian
CLC #10047

Offline Kevin Bielinski #13320

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  • Name: Kevin Bielinski
Re: 1970 Eldorado 500 timing
« Reply #1 on: April 21, 2009, 12:17:06 AM »
I think it's 7 1/2 degrees BTDC just liike the 472.

Offline The Tassie Devil(le)

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  • Name: Bruce Reynolds
Re: 1970 Eldorado 500 timing
« Reply #2 on: April 21, 2009, 03:12:18 AM »
With Vacuum to the Distributor off and plugged.

Bruce. >:D
'72 Eldorado Convertible (LHD)
'70 Ranchero Squire (RHD)
'74 Chris Craft Gull Wing (SH)
'02 VX Series II Holden Commodore SS Sedan
(Past President Modified Chapter)

Past Cars of significance - to me
1935 Ford 3 Window Coupe
1936 Ford 5 Window Coupe
1937 Chevrolet Sports Coupe
1955 Chevrolet Convertible
1959 Ford Fairlane Ranch Wagon
1960 Cadillac CDV
1972 Cadillac Eldorado Coupe

Offline Guidematic

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  • Name: M. Jones
Re: 1970 Eldorado 500 timing
« Reply #3 on: April 21, 2009, 10:03:47 AM »

 Correct.

 Here's a tip to get a bit more responsiveness and fuel economy from your car. In 1970, Cadillac used what they called Transmission Controlled Spark. This prevented any vacuum advance from getting to the distributor in any but top gear.If you by-pass this system, and run the vacuum line directly from the carb to the distributor you can realise better around town fuel economy and a bit more power.

 I went further on my '70 Fleetwood and plugged the vacuum advance into manifold vacuum instead of ported vacuum. This gives full vacuum advance in low engine speed situations which also greatly increases responsiveness and further helps economy. But, you may have to experiment with actual base timing settings. I have found that I can run mine at 10 Degrees with little or no pinging.

 Mike
1970 Fleetwood Brougham 68169
1985 Eldorado Coupe 6EL57
1988 Eldorado Biarritz 6EL57
1990 Brougham d'Elegance 6DW69
1994 Fleetwood Brougham 6DW69

Offline David #19063

  • Posts: 256
Re: 1970 Eldorado 500 timing
« Reply #4 on: April 26, 2009, 09:13:26 PM »
Mike,

The changes you made also helps your engine run much cooler at idle...and also boosts the rpms a bit at idle which will be a benefit for your AC system!
David #19063
1996 DeVille Concours

 

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