McCoy 450 camshaft

[fasterbyelan]

I am trying to find data on the McCoy 450 camshaft as I am in the process of deciding on what I want to do with my Twincam now that its rebuild has commenced. I know Rohan speaks highly of the cam. A power and torque graph would be idea as I can compare directly with those I have from QED (Q360 and Q420).

And where are the cams available from, the web has very little info?

Thanks,

[pharriso]

I would assume that it's from:

John McCoy
OmniTech Engineering
3313 McAlpine Rd
Bellingham, WA 98225

Tel (360) 671 1472
e-maIl: [email protected]
Website: http://omnitech-engineering.com/

[rgh0]

Yes i think the McCoy 450 is a good cam for track work / racing or tuned road cars as it produces good torque and power up to 6500 rpm in a road engine but can also run to 8000 rpm usefully in a race engine. QED make a similar QED 450 cam as well as their 420 cam.

Details on McCoy 450 cam that I have measured

Lift of cam lobe 0.440 inches ( John called it a 450 cam as his cam grinder already had another 440 cam profile)
nominal clearance 0.10 inch
nominal timing MOP 110 degrees ATDC / BTDC
Duration
at 0.010 inch valve checking height - 284 degree
at 0.050 inch valve checking height - 252 degree
at 0.20 inch valve checking height - 190 degrees

Power and torque depend a lot on the rest of the engine details - carbs, exhaust, compression ratio, porting, valve sizes and how many rpm you want to use and your bottom end will take

In a 1600 racing twin cam with top quality porting and big valves and 12.5:1 compression ratio and 36 mm choke Weber 45s and good big bore exhaust in an Elan it produces around

Max power 170 to 175 HP at 7000 to 8000 rpm
Max torque 145 Ft-lbs at 5000 rpm

With a road road engine 10.5:1 compression ratio and conventional bottom end but the same good breathing you should make around 155 to 160 HP at 6500 rpm, though I have never dynoed this combination.

John may be able to give you some more data on the specific build you are proposing.

cheers
Rohan

[fasterbyelan]

Thank you for your replies and the data Rohan. I have emailed McCoy asking for relevant data if available. Will post here if any is received.