1966 Impala

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My 1966 Chevy info:

UPDATES!!
Current Specs
History
Pictures
Engine build pics
Build chart
1st motor (bad)

Tech / Misc:
Tech section
Links
Contact Info

Under contruction:

Desktop dyno 2000 RV stage 2 cam file: Download

Engine building tips: Very usefull performance engine building tips here.
Carbon Fiber: Tips on how to make carbon fiber panels.
Painting FAQ: Great source of painting information for a beginning painter.

Articles:

200+ MPH and Street Legal?: Good tips for people who like speed and want to race at high speed legally.
Differential Oil cooler installation: Keep that expensive rearend cool to extend the life of the gears/limited slip.

Gear Ratios:

• Turbomatic 350: 1st gear 2.52, 2nd gear 1.51, 3rd gear 1.00


• Turbomatic 400: 1st gear 2.48, 2nd gear 1.48, 3rd gear 1.00

• A-Body: GM midsize cars, Buick Skylark, Chevrolet Chevelle, Oldsmobile F-85 and Cutlass, and Pontiac LeMans. Chrysler A-body included Plymouth Valiant and Dodge Dart, and 1st & 2nd gen Barracuda line of cars.


• B-Body: Chrysler designation for midsize cars such as Dodge Coronet and Charger, and Plymouth Satellite and Road Runner cars.


• F-Body: GM designation for Chevrolet Camero and Pontiac Firebird which for the first 2 generations resembled closely to X-Body.


• X-Body: GM Designation for Chevrolet Nova and Pontiac Ventura compact cars.

RPO Numbers for engine cam ID:

RPO = Regular Production Option

1963 -
L75: 300 hp w/AFB - L76: 340 hp w/AFB and Hi-Lift Cam - L84: 360 hp w/FI and Hi-Lift Cam

1964
L75: 300 hp w/AFB - L76: 365 hp w/Holley and Hi-Lift Cam - L84: 375 hp w/FI and Hi-Lift Cam

1965
L75: 300 hp / 327 - L76: 365 hp / 327 and Hi-Lift Cam - L78: 425 hp / 396
L79: 350 hp / 327 with AFB and hyd/Hi-Lift Cam - L84: 375 hp w/FI and Hi-Lift Cam

1966
L36: 390 hp / 427 - L72: 425 hp / 427 - L79: 350 hp / 327

1967
L36: 390 hp / 427 - L68: 400 hp / 427 - L71: 435 hp / 427 - L79: 350 hp / 327
L88: 430 hp / 427 - L89: 435 hp w/ Aluminum Heads

1968
L36: 390 hp / 427 - L68: 400 hp / 427 - L71: 435 hp / 427 - L79: 350 hp / 327
L88: 430 hp / 427 - L89: 435 hp w/ Aluminum Heads

1969
L36: 390 hp / 427 - L46: 350 hp / 350 - L68: 400 hp / 427 - L71: 435 hp / 427
L88: 430 hp / 427 - L89: 435 hp w/ Aluminum Heads

1970
L46: 350 hp / 350 - LS5: 390 hp / 454 - LT1: 370 hp / 350

1971
LS5: 390 hp / 454 - LS6: 425 hp / 454 - LT1: 370 hp / 350

1972
LS5: 270 hp / 454 - LT1: 255 hp / 350

1973
LS4: 275 hp / 454 - L82: 250 hp / 350

1974
LS4: 270 hp / 454 - L82: 250 hp / 350

1975
L48: 165 hp /350 - L82: 205 hp / 350

1976
L48: 180 hp / 350 - L82: 210 hp / 350

1977
L48: 185 hp / 350 - L82: 210 hp / 350

1978
L48: 185 hp / 350 - L82: 220 hp / 350

1979
L48: 195 hp / 350 - L82: 225 hp / 350

1980
L48: 190 hp / 350 LG4:180 hp / 305 (California Legal) - L82: 230 hp / 350

1981
L81: 190 hp / 350 Legal for 50 States. No optional engines offered.

1982
L83: 200 hp / 350 Legal for 50 States. No optional engines offered.

Hydrulic lifter spring preload setting.

Ok hopefully all of you know how to remove the valve covers for this so I will skip to the good stuff. The following is for hydraulic lifter camshafts: Turn the engine in the normal direction of rotation until the exhaust pushrod starts to move up, then adjust the intake valve to zero lash with no preload (zero clearance between the rocker and the top of the valve stem), then between 1/2 to 1 turn more. Turn the engine over again until the intake pushrod goes all the way up, and then comes almost all the way back down. Then set the exhaust valve to zero lash then between 1/2 to 1 turn more. Do this for each cylinder until all valves are adjusted. This should be the correct preload for any hydraulic lifter cam. Your rockers should not need to be adjusted again.

Quadrajet idle mixture screw setting.

Basics: To start from scratch turn your screws all the way in untill they gently seat then back out 2 and 1/2 turns. This should be enough to get the engine to Idle. Once the engine has started, with the vacuum lines pluged, if necessary turn one mixture screw at a time untill the engine starts to run rough then back out 1/2 turn, or (if you have a vacuume gauge) untill the highest vacuum is reached or highest idling RPM. There you have it, adjusted mixture screws.