Race Engine Forum UK

Hi Guy.

I have through a parts-swap deal acquiered a cam for an old type twincam engine. It was placed in a 124AC.000 type exhaust cambox when I recieved it. The only marking is "11C3". It has a lift of apx 10mm and the duration seems to be quite long. I was told that it originally came with an adjustable pulley, but I have not recieved the pulley yet so I don't know if there are any markings on it.

Does anyone know what kind of cam this is? Any information about it or even what kind of power/performance such a cam can help me achieve is apreciated. Also if anyone can give me a clue about a suitable cam to match this one, I will be very happy.

I'm currently collecting pieces for modifying a 124 sport coupe 1800 engine. The plan is a fast road-type engine, for road and occational track days. If anyone has views as to wether or not this cam will fit such an application, I will appreciate it.

At first glance the machining looks like Columbo & Bariani but I don't think they ever produced cams with the nose drilled, so it's more likely to be an Abarth or Breda cam, though I cannot tell you much more. If it'scast iron it's definitely not C&B.

C probably stands for Corsa (race/competition) as opposed to S for Stradale (road).

What you do with it depends on the rest of the spec. To get the best from the 1800 I would use this lower lift cam on the ex side and use something like a GC 3D in the inlet, 11.3mm nom lift, timing 108 deg ex 100 inlet, forged pistons (GC are on special offer - see sales), flowed head and header to GC dims, 44 IDF maybe.

GC

Thanks Guy!

I'll see if I can find anything about it on the internet. A friend of mine also thought C&B, and that the coding means 11,3mm lift and, as you said, c for corsa. He thought it to be too much of a race cam for my 1800, but I think I trust your opinions more. Engine build will be springtime because I'm working on the undercarriage and brakes right now, so unfortunately I won't be able to take advantage of your sales prices. (which means you'll make more money on me later ;-) )

I've ordered a "Whoa" brake kit from Midwest124, and polyurethane bushings for the rear trailing arms. Good handling first, then I can focus on power. :-) Plan is to enter an asphalt classic car race series in Norway called Corsa Italiana.

I'm currently collecting pictures to go with an introduction of my car under "Reader's Cars"

Atle.

Atle,

sure I was tempted to say that - but - you said that the lift was about 10mm.

You need to set it up between centres and measure it accurately. No point guessing.

You can put the cam in the cambox with a bucket and do the same thing by rotating the cam and measure the bucket lift with a vernier if you don't have a dti (dial type indicator).

C& running clearance could be anything form 0.4 to 0.5mm. Lets see what the nominal lift is first.

(sorry about the huge photos, I will edit them later)

G

Thank you Guy!

I'll place a bucket in the cambox and measure the exact lift.

Atle.