Ivan Tighe Engineering

[Ghostrider]

To ALL Queenslanders and others that have dealt with this cam maker.

I have a small problem.

Firstly, as Ivan Tighe Engineering through the motorsport world, has a reputation of being THE BEST cam builder in Australia.

WHAT ARE THE CHANCES OF THEM GETTING IT ALL WRONG?

I have an L series 6 cylinder cam, made by Tighe Cams, it's profile number is 312, it's advertised specs are as follows:

Ex Op BBDC at 60, Ex Cl ATDC at 18, In Op BTDC at 22, In Cl ABDC at 58

Advertised duration is 258 degrees

Gross Valve Lift is .472 in with Rocker Ratio of 1.5

Today I picked up the cam from CAMTECH after having the cam read by their cam doctor, and they claim the following:

Ex Op BBDC at 72, Ex Cl ATDC at 44, In Op BTDC at 39, In Cl ABDC at 72

Advertised duration 291 in, 296 ex

Gross Valve Lift .468 in intake & .4695 in exhaust.

Can someone please tell me if and or how this is possible, that reputedly the best in Australia can get it all this very wrong.

I'm not trying to stick it to Tighe Cams, I'm checking the authenticity of this given cam doctor, when they want to sell me a new cam for $330.00

Cheers,

Dennis