Camshaft question here.

[Project69]

I was thinking about getting a .525/.546 lift, 241/249 duration @.050" hydraulic flat tappet cam. Its say though all these recommended things that need to be done to your car. Minimum compression 10.5:1, 4.11 gears, 3500 stall. Well could i run that cam with 10.7:1 compression, 3.08 gears, and 2800 stall? Are they reccommending all those parts so the engine runs at its best?



Oh and the camshaft RPM is 2500-6600...

Help please.

[68Formula]

Another big factor in camshaft selection is engine displacement.

Anyway, this camshaft will give you nearly no bottom end torque in your combination and will cause driveability issues especially with your gearing. In reality with your displacement you could run a smaller camshaft and make the same peak power while having more torque.

Contact the cam manufacturer's tech and give them your information:
Displacement
Compression
Torque Convertor
Gearing
NOS use
Cylinderheads
Intended use (road racing, strip, street/strip)

You'll get a much more accurate accessment of your cam needs.

[Project69]

Thanks for the info.

[HILROD]

You'll need more stall for sure. The gears should be changed too, but if you have low enough gears in the trans you might get by. If you can live with the sluggish power down low.

[Project69]

I can live with sluggish power down low. the only times i race this thing are against bikes really from 65+ and thats a blast. Beat a couple, and the 3.08s help ALOT haha.

[68Formula]

Again, it's possible this is so much cam that one with 10 or 20 degrees less duration is going to give you the same power at whatever your shift point is.

In other words let's say your redline is 6600rpm. That means you want peak power between 6100 to 6300rpm. If the larger camshaft does not exceed the smaller one in power until after 6600rpm then you cannot take advantage of the power gain. Furthermore, you have given up a large amount of torque for this lack of power gain making the car slower.

Larger cam does not always equal quicker car. You have to consider all the other factors as well.

I strongly urge you to call the cam manufacturer's tech line for advice.

Let us know what you decide and how it works out.

[Project69]

i will do that, thanks