Diyvehiclerepair
Take your digital caliper and measure the smallest diameter on the cam. This is called the base circle. This cam measured at 1.10 inches and 87 thousandths. The next value you will need is the largest diameter on the cam, the lobe part, which is called the base circle and lobe lift.
- How do I know what size my cam is?
- How do I identify a camshaft Comp cam?
- What do the numbers on my camshaft mean?
- What is considered a mild camshaft?
- How do you know if you have a worn cam lobe?
- How do you know if you have a flat cam lobe?
- What does +4 mean on a cam?
- What is a 280 cam?
How do I know what size my cam is?
Locate the ID number on the camshaft. It is typically located in the center of the cam between the lobes. The ID number will consist of either eight or nine digits; the last four numbers identify the cam and its specific application.
How do I identify a camshaft Comp cam?
COMP Cams uses two-number designations for all its engine families. The LS engine is designated 54 and this number is generally the first two numbers that define the actual cam part number. Other examples include small block Chevys -12, big block Chevys -11, and 5.0L small block Fords -35.
What do the numbers on my camshaft mean?
The first two numbers are the degrees of opening being 210 for the intake and 218 degrees for the exhaust given normally at .050 inch of lift. The next two numbers are the valve lift of intake and exhaust in thousands of an inch. The final number is the degrees of overlap.
What is considered a mild camshaft?
An RV or towing camshaft, which is considered a mild performance or an economy cam, will often have a narrower LSA, between 112 and 114 degrees. Hot street camshafts usually have 110- to 112-degree LSA, while high performance and racing camshafts will often run between 105 and 108 degrees.
How do you know if you have a worn cam lobe?
To help you prevent all of this, here are common camshaft wear symptoms to look out for: Active check engine light. Loud ticking or tapping sounds. Metal debris in the engine oil.
How do you know if you have a flat cam lobe?
A flattened cam lobe will often manifest first at low rpm, especially for engines with hydraulic lifters. At idle and low rpm, the valve is barely open even when the cam is brand new; when the lobe flattens out, the valve may not open at all until the lifter pumps up at higher rpm.
What does +4 mean on a cam?
+4 or what ever amount you buy is the intake center line of the intake lobe degree. If you buy a cam with 112 + 0 then the intake center line is also 112. If you buy a cam with 112 + 4 then the intake center line is 108. Rule of thumb is advancing the cam gives more bottom end and retarding the camgives more top end.
What is a 280 cam?
The biggest and baddest offering from Comp Cams, the 280+, offers 100 additional horsepower over the factory camshafts. ... The Comp 280+ camshaft set delivers a strong powerband above 4,500 RPM at the expense of a lopey idle. Valve spring upgrades are required with these camshafts.
