71 240z cam Questions

[AndyG]

Hey hows it going. I have a 240z manufactured in 10/71. It has the stock l24 block with an n42 head. Its mostly stock except for dual high flow air filters and no smog equipment. Im planning on installing a centerforce 1 clutch and pressure plate, electronic ignition distributor, msa 6 into 1 header, msa 2.5 inch exhaust and an msa cam. I was considering their stage 3 cam. They say it has a rougher idle and pulls hard from 3000 to 6500. the numbers on it are Grind: 17034. Lift(In/Ex): .460/.460. Duration(In/Ex): 270/280. This seems like a good cam for my situation. Im also planning on running some smaller mods, like a euro single groove crank dampener, since ive removed my power steering... an electric fuel pump and other small power scavengers like that. Any advice or experiences with cams would be appreciated. Thanks... andy

[2ManyZs]

I think you meant to say the air pump and not the power steering pump.....

You seem to have a good plan, but in my opinion, you ought to think seriously about using another cam. The Stage 2 cam would be a much better choice, especially if the car is going to see mostly street driving. You'd be much better off with a cam with a power band spread across a wider range of RPM's. I think with the cam you picked out, you would be giving up a lot on the bottom end, and the L-24 doesn't have enough that it can afford to lose any. The next step down in cam choices from MSA gives you a power band from 2-6K and will work with either stock SU's or even the smaller of the triple carbs (40MM), which still gives you a choice later on induction.

The one you picked would probably be better suited to either a bored L-24 or an L-28 with increased compression, and would be best left to people that will use their car on the track a lot at high RPM's.

[Brett240]

i had a stage 3 in an L26 once... waste of time.

for the money stuff the cam and pick up an L28 block and put your head and bits and pieces on that. heaps better.

unless of course you want to keep the L24. with a stage 3 cam youll need 10.5:1 compression and upwards it to feel good.