Performance Cams

[Kadett-o-Maniac]

Originally Posted by Manta72 For a more radical approach, yo can try the Steinmetz ST17 or Irmscher 555.1 camshafts. These are much "wilder" cams and will need further modifications such as a twin carburator set-up, bigger valves, ported heads, and a good exhaust system.

Yes, this is true, i can approve this!

Here in Germany is the old Steinmetz ST 17 or the Mantzel M 17 H one of the best profile in cams, which you can get to use it on the street or in semi race!

She has 320° duration 11,8mm lift complete and 5,5mm in top dead center and 104° valve overlap, but you must use a single port for every intake, at best with Weber carbs in 45 or 48mm and the other goodies aforesaid!

I use also an old profil from Irmscher, the IRM10 with 312° 12,3mm 4,25mm 107° with a street ported 2,0 head with original valves in 42/37mm on a original 2,4 block, 45mm double webers and a 63,5mm exhaust system and the engine has 175 hp at 5800 rpm and 227 nm torque at 4800 rpm!

There were a lot of power from 2000-6000 rpm and no hole in acceleration, but i use a ZF 5 gear transmission with short gear ratio, that helps a little bit in acceleration!

In my next engine, i will also use the ST 17 cam, then i will tell about the power envolvement...

Best regards Ronny