Catcams 4900321 Profile Cam....anyone Use It?

[Chris H 10]

Just wondered if anyone has used a Catcams 4900321 cam as i've been offered a brand new one cheap and it looks like it could be ideal for a budget engine i'm planning to build.

 

The cam specs off cat cams website are

 

4900321

INTAKE EXHAUST

 

 

clearance [cl] 0.25mm 0.30mm

duration [0.1mm+cl] 291° 285°

duration [1.0mm+cl] 243° 242°

valve lift [cl=0] 11.35mm 11.40mm REQUIRED PARTS

cam lift - -

peak angle 110° 110° followers: O.E.M.

timing [1.0mm+cl] 10/53° 50/12° retainers: O.E.M.

lift at TDC [cl=0] 2.30mm 2.45mm springs: O.E.M.

 

I am planning to fit this to a 1900 with a mint std head with GPA valves and double springs. Lightened and balanced bottom end, weber 45mm Throttle bodies and ecu. Tubular manifold and competition system.

 

I'm wondering if i went for this cam, would it be worth fitting 1.6 pistons to raise the compression up....i guess it would make the most of the cam.....but i'd have to strip apart the engine for no other reason.

 

I've got pretty much everything above all built up....just the engine has a std cam (not the PTS cam it was supposed to have) so i'm sure a cam would give me a good increase in engine performance.

 

If anyone has other suggestions for cams or modifications to suit the rest of the engine spec above, feel free to recommend.

[welshpug 1,661]

As its on ITB's it will work on standard compression reasonably well, just not as well as if it had decent compression.

 

I had a Piper-pugsport gravel/max torque cam in a stock 1.9, didn't really like part throttle under 2k once past that it went well but it didn't stay in that spec for long as I got annoyed with its poor manners at low revs (was on standard inlet, but no AFM as I have Motronic with MAP sensor)

[Chris H 10]

I've been thinking of a PTS Max Torque cam as another option. On paper the figures don't seem too wild but the overall profile certainly seems to work from what i've seen.

[petert 588]

The large duration at 0.1mm tells you it has a very late closing inlet, and thus will be a poor choice on standard compression. You need 10.5:1 minimum for that cam. It's a typical 35/75 profile.

Edited January 11, 2011 by petert