What is initial timing on a 454?
The timing on stock 396, 402, 427 and 454 engines is 32-34 degrees total advance at 3500 rpm. This is for an engine with stock camshaft, heads, stroke, and a compression ratio of 10:1.
Should timing be set at idle?
A slow advance can hinder performance while too much advance can cause pre-ignition resulting a loss of power or even engine damage. This is why it is important to check the timing at idle and at higher rpm so you know what the total advance is at.
What can cause retarded timing?
Reasons a Late Model Vehicle will Retard the Spark The computer will also retard the spark if the engine is running too hot. Excess heat, coupled with lower octane-rated fuel, will cause the engine to experience spark knock. The spark timing is automatically retarded when knock is detected.
When did the Toyota 22R E engine change?
In 1985, the 22R engine was redesigned, many parts from the newer 22R-E (such as cylinder head, block, pistons, the timing chain, and cover, water and oil pumps) are not compatible with those from the older pre-1985 engine.
How much horsepower does a Toyota 22R have?
The engine produced from 98 PS (72 kW; 97 HP) at 4,800 rpm to 110 PS (81 kW; 109 HP) at 5,000 rpm of maximum horsepower and from 174 N·m (17.7 kg·m, 128 ft·lb) at 2,800 rpm to 187 N·m (19.1 kg·m, 138 ft·lb) at 3,400 rpm of peak torque. The Toyota 22R has a cast-iron cylinder block with five bearing support system.
What kind of compression ratio does Toyota 22R have?
The engine was manufactured by Toyota Motor Corporation since 1981 to 1995. The 22R engine features a cast-iron block and aluminum cylinder head with the single overhead camshaft (SOHC) and two valves per cylinder (8 in total). Compression ratio rating is 9.0:1.
What kind of fuel injection does a Toyota 22R-E have?
The Toyota 22R-E engine has an electronic fuel injection (EFI) system and ignition system with a mechanical distributor. In 1985, the 22R engine was redesigned, many parts from the newer 22R-E (such as cylinder head, block, pistons, the timing chain, and cover, water and oil pumps) are not compatible with those from the older pre-1985 engine.