Does anyone know how to measure the lobes of ITR cams and what the measurements should be? Wanting to use a micrometer to confirm the authenticity or lack there of in a set of cams. Please help, JFoster

 

Any help?

 

find someone or a shop that has a cam doctor

 

What is a cam doctor? There are not many import shops here in MO. Thanks for the reply.

 

Basically it is a support to hold the cam, a dial indicator to measure lift on the cam lobe, and a degree wheel to determin the duration of lift. About all you can measure with calipers is the overall lift and base circle with no info on duration.

 

Cam Doctor is a computerized machine used to check cams, I doubt any "import" shop has one, but a good domestic engine builder might have one. I know Philadelphia Racing Engines has one. I'm thinking there has to be some kind of marking on the cam- part number or something on the end that could tell you

 

try doing a search?

i found info on identifying itr cams. im actually trying to find out how to identify the ctr intake cam visually myself before i take a mic to it.

 

The ring are usually the ID but the guy claiming they're fake says that even though the ring are present they are fake.He says that because the cardboard box they came in has one flap instead of two, that makes them fake.

I was hoping to show unargueable proof that they are ITR cams by showing that they have the correct lift and duration.

 

dont know if this helps you, but here:
As per helms:

Lobe height:
b18c1:IN: pri: 33.411
mid: 36.377
sec: 34.547
EX: pri: 33.111
mid: 35.720
sec: 34.381

b17a1: IN: pri: 33.088
mid: 36.431
sec: 34.978
EX: pri: 32.785
mid: 35.720
sec: 34.691

B16a: IN: pri: 33.088
mid: 36.267
sec: 34.987
EX: pri: 32.785
mid: 35.720
sec: 34.691

Sorry, dont have the type arrrrr one
Just my 02