Cosworth A2 Cam Profile

I think you'll find that the A2 profile is a fairly mild grind, perhaps only slightly warmer than a GT profile.

Ford Cosworth A2 cam spec,
40/76 76/40
Lift 0.350 in/ex
tappet gap 0.020 in, 0.022 ex.

The A2 gives a lumpy idle with a 2ltr carby.


1300GT/ 1500GT till Oct '70( 1600GT)
27/65 65/27
lift 0.344 in, 0.335 ex
Tappet gap 0.012 in, 0.022 ex

Thanks for the specs Marty. I'm looking forward to the day when he does beat me, looking to stock up on cheap used gearboxes for the time being. He has two younger brothers [:u][:u][:u] I made sure I got a auto tunnel shell. I think I'll be changing a few boxes and clutches.

Didn't think about the thermo fan as well as the normal. I considered an oil cooler but thought that was overkill, perhaps not.

I've got my first MK this weekend, done loads of rallies and autocrosses but never a motorkhana. At least I've got until April when my eldest turns 12 to give me a head start[:x)], If the go karts are anything to go by (after about 20 minutes of karting he was giving me a hard time) it won't be long before I'm having to chase him.

Did you run a quickrack ? I considered it, but on balance thought it might make it a bit hard for the kids to wrestle with the steering.

Hi This is a late reply to the post but hope it will help someone out in the future.
 
Unfortunately I was sold an A2 cosworth cam for my 1980 1600cc MK2 Escort and wasnt told it needed side draughts !!! 
 
 I had asked for a cam that didnt idle like a tractor and that gave a bit of mid range extra power - well it did idle roughly and the car wouldnt even start properly, it ran really rich and fumed, stuttered when driving - what a shambles !!!  I spent almost $1000 NZ at the local garage where the older experienced owner spent hours pulling his hair out trying to work out why it wouldnt run properly. 
 
Wasnt until I spoke to  a very knowledgeable guy at webber specialities in Auckland that he worked out from the specified setting that it needed side draughts !!!    I was never told this ....grrrrrrr
 
We altered the valve settings and at least got the thing to run. It still fumed and smelt really rich 
 
 
It wasnt sucking in enough air to pull the fuel through the system properly. The plugs were fouling up and I  suspect this is why suddenly I had a catastrophic engine failure - the pistons got loose in the block (probably because fuel was actually getting drawn down there! )
 
Roll on the total rebuild at 170,000km !!!
 
Ive since got a cam that is one stage up from a GT cam called a 150-A cam in NZ
 
It is fantastic - certainly much better mid range power (I'd guess 20% ?) , idles well (but slightly rougher but not much)
 
Certainly pays to get the correct advice, do your homework and check things out properly and deal with reputable suppliers. May cost you more but works out far cheaper than having to repair all the stuff ups as I learnt the hard way !!!
 
 
Good luck out htere 
 

I used one in a MK2 Escort years back. We spent a bit of time jetting the 32/36 and had a re-curve done on the dizzy,  after that it ran like clock work. Didn't have much low end torque but when it got spinning it was a missile.
Cheers Drew