Pro Torquer

LC Engineering's EFI Pro Torquer Camshaft is an excellent upgrade to any mild engine application. This cam is compatible with a carbureted or factory fuel injection setup. This cam is also designed to work with the factory valve train components so you will not have to upgrade springs, retainers, etc... This cam has an offset duration between the intake and exhaust side to create a strong low-end torque curve while still providing good pulling power up to 5,000 RPM.

LC Engineering is constantly striving to improve both the quality and performance of our products. We test our camshafts on the street, race track, and off-road. The results are an improved line of camshafts that offer a broader selection of grinds, increased horsepower, and higher quality. All LC Engineering Camshafts are ground on new billets and double heat-treated for long life. Each has been designed for maximum torque and horsepower, specifically for the application. When comparing camshaft profiles, always reference the duration @ .050" valve lift.

20R/22R - Pro Torquer Camshaft

Relatively Smooth Idle, Torque Improvement (1200-5000 rpm range)
Throttle Body, Filter Charger, 1 1/2" Header

	Intake	Exhaust
Valve Lash	.008	.012
Valve Lift	.440	.445
Advertised Duration	237°	259°
Duration @.050"	208°	221°
Lobe Center	106°	114.5°
Lobe Separation	110°

Intake Opens -2° BTDC
Intake Closes 30° ABDC
Exhaust Opens 45° BBDC
Exhaust Closes -4° ATDC

NOTE: LC Engineering will not warranty any cam damage if you do not purchase new Toyota rocker arms from LC Engineering, or a complete rocker arm assembly from LC Engineering at the same time as purchasing our camshaft.

• Individual rocker arms, see Part #: 1023015.
• Complete rocker assembly, see Part #: 1023018.

Buyer beware on reground rockers in the market. Regrinding the pad on the rocker can remove the heat treated portion of the pad making for a soft rocker. Rocker arms that are reground will not have the factory geometry of a stock rocker. To regrind a rocker will take care of the face surface but will do nothing to address the rocker shaft bore, a loose rocker bore will make adjustment difficult and will never be correct which is why we cannot warranty a camshaft unless new rockers are purchased with a camshaft.

This product should not be used in a manner that violates Federal EPA Laws.

Contact our Tech Support Line for further information at 928-575-2174.

Note: Images are for illustration purposes only. Images may not represent the product listed. Please contact customer service with any questions or concerns: 1-928-505-2501.

1975-1980 20R 2.2L Engines

1981-1995 22R 2.4L Engines

1983-1995 22RE 2.4L Engines

1985-1988 22RET 2.4L Engines

To open a printable PDF version of this instruction CLICK HERE

This Camshaft must be installed with new rocker arms. LC Engineering will not warranty any camshaft that was not purchased together with Aluminum rocker arms. LC Engineering highly recommends using our Pro Camshaft Kit (Part# 1020000) or Double Spring & Retainer Kit (Part# 1023210) when running any cam with over .460" lift or in any application that requires a sustained RPM of 6,000 or higher.

The following figures taken @ .050 lift at valve with .000 valve lash.

Installation Notes:

• Always check valve to piston clearance and Valve to valve clearance with this Camshaft! Failure to install this cam with matched valve train components can cause engine damage.


• After installing a new camshaft, lash #1 intake valve to zero then screw intake valve in .080” (Valves not closing completely) with spark plugs removed turn engine over CAREFULLY BY HAND. Do intakes first, if OK then do exhaust. If engine cycles without binding, you are sure that you have minimum clearance (If binding occurs, piston clearance is required).

Camshaft Break-In Instructions

The first few minutes on camshaft and rockers are the most important wear period. In this period the cam and rockers become burnished together. When installing the camshaft, thoroughly coat the lobes with the special assembly lube provided. Cam should be installed per factory service manual procedures. Set valves at proper lash dimensions, and then readjust valves after break in period is completed. CHECK valve train for interference. CHECK valve to piston clearance, you must have .100" min. CHECK valve spring retainer to valve guide and seal for clearance. CHECK valve springs for coil binding, you must have .090" min. Of free travel before the springs become solid after the valve in fully open. 98% of all cam failure is excessive valve spring pressure.

Start engine quickly, excessive cranking of engine is not good for the camshaft. Bring rpm to 1500-1800 for 20-30 minutes (ABSOLUTELY NO IDLING & NO REVVING OVER 2000 RPM) during the break in period. Camshaft should now be burnished to the rockers. It is absolutely vital that once a cam lobe and rocker have been burnished together, they remain together. So if the camshaft and rockers are removed from the engine, be sure the rockers are numbered and reinstalled on the same lobe. Failure to do this is asking for disaster.

NOTE: Standard degreeing procedures should be followed for maximum performance. All cam specifications are checked at .050" lift.