Engine rebuild: wich camshaft ?, 2.0 rebuild 125-130 hp expected Options

[pat4]

Hello,

I decided to rebuild my 2.0 engine. FI have been removed in a previous life, and the car is running (baddly) with two Weber 44 IDF. So we decided to rebuild all. As the cranckase will be open, it seems the right time to choose a new camshaft. But wich one ? Wich duration ? Wich lifting ?

I do not want to build a race engine, but a funny street car. 120 to 130 Hp are expected, with also a little job on heads (Comp. ratio upgraded from 8.0 to 8.5)

Any advice welcome.

[Jake Raby]

A camshaft cannot be a guesswork item!!

The main things that any experienced engine builder takes into account when selecting a cam are important.

Camshafts change the events that occur within the engine totally, and thus effect the engines "Dynamic compression ratio" This happens due to performance cams opening the valves at different crankshaft positions, and normally bleeding more compression from the cylinder, thus dropping the CR while the engine is running.

When I got heavy into these engines, the assembly was easy, the machining was easy, but the power was not there. The engines ran rich, were hard to tune and just ball-less. Thats before I became a configuration specialist!

Configuration is where it is ALL AT! Amisconfigured engine is a nightmare, idles rough, runs rich, runs hot, and makes no power at any RPM. The biggest problem I have to fix with other shops work is their combinations!

Many times the CR is not adequate for the cam, the valves are too large, and the bore is too big, or any combination of those.

The key is to have the cylinder heads designed and flowed BEFORE choosing the camshaft, and CR. I design my engines around my theory of running more static CR and bleeding it with a nice cam, which is most of the time set up with split duration.

I have 20 different custom camshafts made up by Web Cam. If you purchase a cam from me, I will take the time to set you up with what you need, based on experience.