![]() ![]() Your Z is likely the 390/300, good reliable cruiser, iron intake, 4100 autolite 1.12 4bbl, flat log exhaust. The P=390/330 Gonkulates to about 315-320hp depending on the year. Late 64 and 65 had flat iron exhaust as they ran out of the branch "shorty" iron during 64 and it didnt fit in 65 anyway. P=390/330, small solid cam, branch exhaust gasoline (petrol) engine with displacement: 6384 cm3 / 389.6 cui, advertised power: 223.5 kW / 300 hp / 304 PS ( SAE gross ), torque: 579 Nm / 427 lb-ft, more data: 1965 Ford Thunderbird Hardtop 390 Special V-8 Cruise-O-Matic (aut. 390 Compression Ratio 1O.5 to l Brake Horsepower 315 at 4600rpm 335 at 4800 rpm Maximum Torque (lbs. FORD MERCURY : 1965-69 Tune-up Specifications: 1970-75: Year: Engine Car Model: Spark Plug Type (A) - Gap: Point Gap. Z=390/401, 3x2v Holleys, most or all in the trunk & dealer install. GENERAL SPECIFICATIONS 8-cylinder, 90-V, overhead valve Bore and Stroke (inches) 4.05 x 3.78 Displacement (cubic inches). 1965-75 Ford & Mercury engine tune-up specifications including timing, dwell angle, and spark plug gap, and firing order. ![]() Engine Torque Values : Year: Engine: Spark Plug: Cylinder Head Bolts: Intake Manifold: Exhaust Manifold: Rocker Arm Shaft Bracket: Rocker Arm Cover: Connecting Rod Cap Bolts. Z=390/375, Holley600cfm, alum intake, solid cam, good heads, branch exhaust. 1959-75 Thunderbird engine torque value chart gives you the correct bolt tightening requirements to prevent damage. Mercury Cougar is a nameplate applied to a diverse series of automobiles sold by the Mercury division of Ford from 1967 until 1997 and from 1999 through 2002 model years. Gonkulator says about 290hp realġ961 my understanding was a bit special, Z-code was used for ratio: 10. A single 446cfm 4-barrel carburetor was mounted on the traditional cast-iron intake manifold. ENGINE CODE/DESCRIPTION Z Thunderbird 390 Special V-8 Bore & stroke: 4.05' x 3.78' Comp. Z=390/300 64-65 at 10.0cr (no dish) Gonkulator says about 285hp real 'The most popular 390 was the Thunderbird 390 Special, rated at 300 horsepower at 4600rpm, 427 lbs-ft of torque at 2800rpm and with 9.6:1 compression and a hydraulic camshaft. I was told it had 330 hp from the factory Is this true? Any other info on a Z code 390? Should it be a4 barrel?Z=390/300 61-63 at 9.6cr (slight dish) Gonkulator says about 280hp real ![]() Looking into purchasing a'61 Ford with a"Z" code 390. ![]()
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