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Spitfire
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Up to 1977
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Catalytic Converter Specification
only
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Idle Speed
|
700-900 r.p.m.
|
700-900 r.p.m.
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Fast Idle Speed (US)
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1700-1900 r.p.m.
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1700-1900 r.p.m.
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Fast Idle Speed (non-US)
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1100-1300 r.p.m.
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-
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Rocker (valve) Clearance (Cold)
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0.010" (0.25 mm)
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0.010" (0.25 mm)
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Dwell
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1962-74 see Timing data below, 1975-77
fixed
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Fixed (Electronic)
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Carburetter Type
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150 CDSE 1970-?
150 CD4 (? to 1977)
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150 CD4T (1977 on)
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Needle
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A.N. (1147cc w/twin SU)
B5AV (US Mk3 & MkIV w/Stromberg)
B5CH (1973-74)
BIDL (1975-76)
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BIDL (1977-78),
45P (1978-79)
45N (1980)
45L (1978-79 California),
45N (1979-80 California)
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CO Reading at Idle
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Min. 1%, Max 3.5% (1970 US spec.)
Min. 2.5%, Max 4.5% (pre-1500)
1.5% Nominal, Min. 0.5%, Max 2.5% (US
1500)
3% Nominal, Min. 0.5%, Max 6.5%
(non-US)
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3% Nominal, Min. 0.5%, Max 6%
(1977)
5% Nominal, Min. 3%, Max 7% (1978-79)
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Procedure for Setting
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Disconnect and plug the air injection
system, (downstream of the diverter valve
vent pump to atmosphere) and adjust the
mixture strength with the external
adjuster. To give larger adjustments move
the metering needle using a special
tool.
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Firing Order
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1-3-4-2 (#1 is at front of car)(turning
counter clockwise)
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1-3-4-2
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Points Gap
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0.015" Mk1-2 (factory manual says
0.020, but service bulletin revises to
.015 in 6/63)
0.015" Mk3
0.016" Mk4
0.015" 1500
|
0.015" (0.38 mm.)
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Plug Gap
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0.025" (0.64 mm.)
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0.025" (0.64 mm.)
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Plug Type
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Champion N9Y (62-70), UN-12Y (70),
N-12Y (71-80)
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N-12Y
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Plug Torque
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25 ft/lbs
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GT6
|
North America spec GT6 Mk1
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GT6 Mk2
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North America spec GT6+
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Mk 3
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Idle Speed
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600-750 r.p.m.
|
700-900 r.p.m.
|
700-900 r.p.m.
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700-850 r.p.m.
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Fast Idle Speed
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1700-1900 r.p.m.
|
1700-1900 r.p.m.
|
1700-1900 r.p.m.
|
|
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Rocker (valve) Clearance (cold)
|
0.010" (0.254 mm.)
|
0.010" (0.254 mm.)
|
0.010" (0.254 mm.)
|
0.010" (0.254 mm.)
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Carburetter Type
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150 CD
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150 CDSE (150 CD non-US)
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150 CDSE
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150 CDSE
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Needle
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6J
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6 AL (6 AC non-US)
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B5 AJ
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B5BT (B5CF)*
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CO Reading at Idle
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-
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Max 2.0%
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Max 2.0%
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Firing Order
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1-5-3-6-2-4 counter-clockwise (from top
of distrib.)
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1-5-3-6-2-4
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1-5-3-6-2-4
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1-5-3-6-2-4
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Points Gap
|
0.015" (0.38 mm.)
|
0.015" (0.38 mm.)
|
0.015" (0.38 mm.)
|
0.015" (0.38 mm.)
|
|
Plug Gap
|
0.025" (0.64 mm.)
|
0.025" (0.64 mm.)
|
0.025" (0.64 mm.)
|
0.025" (0.64 mm.)
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Plug Type
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Champion N-9Y
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Champion N-9Y
AC Delco 42XLS
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Champion UN12Y
AC Delco 44XLS
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Champion N-9Y & N12Y
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TIMING
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static (engine not running)
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Strobescopic (at idle with distrib
vacuum advance disconnected and
plugged)
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Stroboscopic (other)
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Dwell
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GT6
|
|
GT6 Mk1
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13° BTDC (100 octane fuel)
7° BTDC (97 octane fuel)
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-
|
-
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40°-42°
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GT6 Mk2
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10° BTDC
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4° ATDC
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-
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40°-42°
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GT6 +
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6° BTDC
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4° ATDC
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-
|
?
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GT6 Mk3
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10° BTDC
6° BTDC*
(12° BTDC according to 1973 Emissions service bulletin)
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4° ATDC
|
-
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40°-42°
(*38°-40°)
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Spitfire
|
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Spitfire Mk1
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13° BTDC***
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-
|
-
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36°
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Spitfire Mk2
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13° BTDC***
Haynes says 17°
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-
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-
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36°
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Spitfire Mk3
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6° BTDC
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6° ATDC
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-
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40°-42°
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Spitfire Mk3 w/emissions
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6° BTDC
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2° ATDC (800-850 rpm)
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-
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?
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Spitfire Mk4 (non-US)
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6° BTDC (up to FM25000)
8° BTDC (after FM25000)
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?
|
-
|
?
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Spitfire Mk4
|
6° BTDC
|
2° ATDC (800-850 rpm)
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-
|
?
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Spitfire 1500 (non-US)
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10° BTDC
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10° BTDC (650-850 rpm)
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-
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46°-56°
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Spitfire 1500 up to 1976
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10° BTDC**
|
2° ATDC
|
14° (plus or minus 2°) BTDC
at 1100 rpm
|
38 to 40 deg.
fixed for electronic ignition
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|
Spitfire 1500 1977-79
|
10° BTDC**
|
10° BTDC
|
14° (plus or minus 2°) BTDC
at 1100 rpm
|
fixed
|
|
California Spitfire 1500 up to 1976
|
2° ATDC**
|
2° ATDC
|
-
|
fixed
|
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California Spitfire 1500 1977-79
|
10° BTDC**
|
2° ATDC
|
-
|
fixed
|
* after KC or KF 10000
** Electronic Ignition. A few manuals I found
recommend against using static timing on cars with
electronic ignition.
BTDC= Before Top Dead Center
ATDC= After Top Dead Center
***The recommended timing for a Mk1 or Mk2
Spit. Adjust as follows:
1. Rotate the Vernier adjuster knob
counterclockwise until it won't turn anymore.
2. Position the crankshaft so that the front
cylinder is at TDC and ready to fire. (The pointer
on the timing chain cover will be lined up with the
timing mark on the pulley)
3. Rotate the distributor body clockwise until the
points just begin to open (make sure the rotor is
pointing to the #1 piston) A test lamp is helpful
for this operation.
4. Tighten the distributor clamp to lock the
distributor in place.
5. Rotate the vernier adjuster knob until you
achieve 13 degrees of advance (each click of the
adjustment knob is equal to 1 degree of
advance)
Visit this
link to see timing marks.
This timing chart is under construction as I
have found MANY inconsistancies between
sources.
Please
me any revisions, corrections, additions.
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|
