Gas Engine Tune Up Specs

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Dead Sled Discussion starter

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#2 · Jan 27, 2003 (Edited)

Year
1970-1971
Engine No. Cyl. Disp. CI (L)
8-472 (7.7)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R46N 0.035
Distributor Point Dwell (Deg.), Point Gap (in.)
30° 0.016"
Ignition Timing Deg. BTDC (Auto. Trans)
8B
Intake Valve Opens BTDC
18°
Fuel Pump Pressure
6 PSI
Idle Speed (Auto Trans)
600 RPM

__________


Year
1970-1971
Engine No. Cyl. Disp. CI (L)
8-500 (8.2)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R46N 0.035
Distributor Point Dwell (Deg.), Point Gap (in.)
30° 0.016"
Ignition Timing Deg. BTDC (Auto. Trans)
7.5B
Intake Valve Opens BTDC
18°
Fuel Pump Pressure
6 PSI
Idle Speed (Auto Trans)
600 RPM

 

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Dead Sled Discussion starter

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#3 · Jan 27, 2003

Year
1972-1973
Engine No. Cyl. Disp. CI (L)
8-472 (7.7)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R46N 0.035
Distributor Point Dwell (Deg.), Point Gap (in.)
30° 0.016"
Ignition Timing Deg. BTDC (Auto. Trans)
8B
Intake Valve Opens BTDC
34°
Fuel Pump Pressure
5.25-6.25 PSI
Idle Speed (Auto Trans)
600/400 RPM

__________


Year
1972-1973
Engine No. Cyl. Disp. CI (L)
8-500 (8.2)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R46N 0.035
Distributor Point Dwell (Deg.), Point Gap (in.)
30° 0.016"
Ignition Timing Deg. BTDC (Auto. Trans)
8B
Intake Valve Opens BTDC
34°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
600/400 RPM

 

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Dead Sled Discussion starter

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#4 · Jan 27, 2003 (Edited)

Year
1974
Engine No. Cyl. Disp. CI (L)
8-472 (7.7)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NS 0.035
Distributor Point Dwell (Deg.), Point Gap (in.)
30° 0.016"
Ignition Timing Deg. BTDC (Auto. Trans)
10B
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
5.25-6.25 PSI
Idle Speed (Auto Trans)
600/400 RPM

__________


Year
1974
Engine No. Cyl. Disp. CI (L)
8-500 (8.2)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NS 0.035
Distributor Point Dwell (Deg.), Point Gap (in.)
30° 0.016"
Ignition Timing Deg. BTDC (Auto. Trans)
10B
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
600/400 RPM

__________

Year
1974
Engine No. Cyl. Disp. CI (L)
8-500 (8.2)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NS 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
10B
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
600/400 RPM

 

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Dead Sled Discussion starter

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#5 · Jan 27, 2003

Year
1975
Engine No. Cyl. Disp. CI (L)
8-500 (8.2)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
6B
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
600/400 RPM

__________

Year
1975
Engine No. Cyl. Disp. CI (L)
8-500 (8.2)
Fuel Delivery
EFI
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
12B
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
39 PSI MIN.
Idle Speed (Auto Trans)
600 RPM

 

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Dead Sled Discussion starter

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#6 · Jan 27, 2003

Year
1976
Engine No. Cyl. Disp. CI (L)
8-350 (5.7)
Fuel Delivery
4V Carb.
Engine Manufacturer
Oldsmobile
Spark Plugs - Origional Type, Gap (in.)
R46SX 0.080
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
10B (6B)
Intake Valve Opens BTDC
22°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
600 RPM

__________

Year
1976
Engine No. Cyl. Disp. CI (L)
8-500 (8.2)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
6B
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
600 RPM

__________

Year
1976
Engine No. Cyl. Disp. CI (L)
8-500 (8.2)
Fuel Delivery
EFI
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
12B
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
39 PSI MIN.
Idle Speed (Auto Trans)
600 RPM

 

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Dead Sled Discussion starter

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#7 · Jan 27, 2003 (Edited)

Year
1977
Engine No. Cyl. Disp. CI (L)
8-350 (5.7)
Fuel Delivery
4V Carb.
Engine Manufacturer
Oldsmobile
Spark Plugs - Origional Type, Gap (in.)
R47SX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
10B (6B)
Intake Valve Opens BTDC
22°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
650 RPM

__________

Year
1977
Engine No. Cyl. Disp. CI (L)
8-425 (7.0)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
10B @ 1400 RPM
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
675 RPM

__________

Year
1977
Engine No. Cyl. Disp. CI (L)
8-425 (7.0)
Fuel Delivery
EFI
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
18 @ 1400 RPM
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
39 PSI MIN.
Idle Speed (Auto Trans)
675 RPM

 

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D

Dead Sled Discussion starter

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#8 · Jan 27, 2003 (Edited)

Year
1978
Engine No. Cyl. Disp. CI (L)
8-350 (5.7)
Fuel Delivery
EFI
Engine Manufacturer
Oldsmobile
Spark Plugs - Origional Type, Gap (in.)
R47SX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
10B (8B)
Intake Valve Opens BTDC
22°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
650 RPM

__________

Year
1978
Engine No. Cyl. Disp. CI (L)
8-425 (7.0)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
18B @ 1400 RPM
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
5.25-6.5 PSI
Idle Speed (Auto Trans)
650 RPM

__________

Year
1978
Engine No. Cyl. Disp. CI (L)
8-425 (7.0)
Fuel Delivery
EFI
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
18 @ 1400 RPM
Intake Valve Opens BTDC
21°
Fuel Pump Pressure
39 PSI MIN.
Idle Speed (Auto Trans)
675 RPM

 

L

lux hauler

1,258 posts · Joined 2003

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#9 · Jan 27, 2003

Dead Sled,
Lots of info there. Thanks for posting it.

 

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Dead Sled Discussion starter

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#10 · Jan 27, 2003

Year
1980
Engine No. Cyl. Disp. CI (L)
6-252 (4.1)
Fuel Delivery
4V Carb.
Engine Manufacturer
Buick
Spark Plugs - Origional Type, Gap (in.)
R45TSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
15B
Intake Valve Opens BTDC
16°
Fuel Pump Pressure
4.25-5.5 PSI
Idle Speed (Auto Trans)
550 RPM

__________

Year
1980
Engine No. Cyl. Disp. CI (L)
8-368 (6.0)
Fuel Delivery
4V Carb.
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
18B
Intake Valve Opens BTDC
11°
Fuel Pump Pressure
5.5-6.5 PSI
Idle Speed (Auto Trans)
575 RPM

__________

Year
1980
Engine No. Cyl. Disp. CI (L)
8-368 (6.0)
Fuel Delivery
DFI
Engine Manufacturer
Cadillac
Spark Plugs - Origional Type, Gap (in.)
R45NSX 0.060
Distributor Point Dwell (Deg.), Point Gap (in.)
Electronic (HEI)
Ignition Timing Deg. BTDC (Auto. Trans)
10B
Intake Valve Opens BTDC
11°
Fuel Pump Pressure
12-14 PSI
Idle Speed (Auto Trans)
575 RPM

 

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Dead Sled Discussion starter

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#11 · Jan 27, 2003

some where I have the 80-present specs I'll keep looking

 

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stupeds

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#12 · Oct 3, 2004

shouldnt the sparkplug gap on the 74 500 and 472 be .060 with the hei dist?

 

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Dead Sled Discussion starter

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#13 · Nov 5, 2004

stupeds said:

shouldnt the sparkplug gap on the 74 500 and 472 be .060 with the hei dist?

Click to expand...

if it has HEI yes if not those specs above are for piont type

 

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stupeds

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#14 · Nov 18, 2004

Dead Sled said:

if it has HEI yes if not those specs above are for piont type

Click to expand...

yeah thats what im trying to say. the 4th post and the 3 engine described is a 74 500 with hei, but you have the gap at .035 when it should be .060 just wanted to give you the heads up so people done set the gap wrong.

 

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Dead Sled Discussion starter

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#15 · Dec 24, 2004

stupeds said:

yeah thats what im trying to say. the 4th post and the 3 engine described is a 74 500 with hei, but you have the gap at .035 when it should be .060 just wanted to give you the heads up so people done set the gap wrong.

Click to expand...

ahh fixed it

 

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Devillian86

15 posts · Joined 2005

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#16 · Jun 8, 2005

Any chance of getting specs for a 79 deville?


thanks

 

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davesdeville

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#17 · Jun 8, 2005

79 specs should be the same as 78 as far as I know.

 

T

the APEMAN

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#18 · Sep 11, 2005

According to Chilton 1984 Parts and Labor Guide:

'79 425 W carb = 23 btdc checked at 1400 RPM. (not the same as 1978)
Fuel injected = 18 btdc which IS the same as 1978.

Some of these books AND the specs posted here are incorrect. They show figures of how many degrees before top dead center the intake valve opens on engines of different years. When you look up the internal engine items such as camshafts, timing gears, etc. they are all the same exact part numbers. Something is wrong.

 

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davesdeville

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#19 · Sep 12, 2005

I said what I said because there were no physical changes between 78 and 79 engines. Who has got a factory service manual, anyone?

 

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deville_in

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#20 · Oct 23, 2005

Since there is some interest and knowledge regarding "Old School" Caddy's - Can anyone direct me to any info on buying the right radial tires for a 1970 Coup Deville Convertible.

the ones one Bebe are (I think) the wrong size - my speedo is off by about 8 miles an hour and the exhaust (on a rare occasion) bottoms out.