Air Conditioning and compatible camshafts

[70383ChargerSE]

Hi everyone, I need some advice, I am looking to change the camshaft in my 440 but don't know what would be too big for my application. I have a 70 charger with a 727 and 3.23's and factory converter, maybe 2200 to 2400.

I was thinking of the comp hydraulic roller xr274hr but wonder if this would be acceptable for my power brakes and air conditioning.

I would like to get as close as I can to 500hp. I currently have a 9.5:1 compression 440, flat top pistons, factory magnum cam, edelbrock performer rpm, holley 670cfm holley, 906 heads and tti 1 7/8 headers.

Any and all suggestions would be helpful. Thanks!

 

[lemondana]

Don't know about that cam. Don't go to big or your heater AC blend doors will work at will, they open and close when they want too. I would rather use a milder cam and have my AC and power brakes work as they should.

 

[Kern Dog]

Hi everyone, I need some advice, I am looking to change the camshaft in my 440 but don't know what would be too big for my application. I have a 70 charger with a 727 and 3.23's and factory converter, maybe 2200 to 2400.
I would like to get as close as I can to 500hp.

There have been dyno tests showing that a stock 440 Magnum actually made a net flywheel HP of between 350 to 360. To get 150 more HP from the engine, you will need more than a camshaft change.

 

[Demonic]

Lobe center of 110, you might be on the borderline. There’s add-on vacuum can reservoirs in the aftermarket.

 

[PRND21]

No expert here, but I’d look into a custom grind with 112-113 degrees of lobe separation.

 

[70383ChargerSE]

Thanks for the responses. I forgot to mention I have 440source heads. Yeah I think a custom ground hydraulic might be my only option if the xr274hr is borderline for power brakes and AC.

 

[oldkimmer]

Not that cam. Get a custom one ground. A bigger carb for starters. 750 or 800 Eddy. Kim

 

[440 Charger]

There have been dyno tests showing that a stock 440 Magnum actually made a net flywheel HP of between 350 to 360. To get 150 more HP from the engine, you will need more than a camshaft change.

Most of these are so amazing.