help with a cam

[billssuperbird]

i have a 440 4speed with 3.23 gears. is a comp cam part number cl21-222-4 ok to use.

[76charger]

Is there a factory cam in it right now? If so yea that cam will be very good for you.

[billssuperbird]

the guy i got the motor from said it has a mopar purple cam with 509/292

[Cooter]

If it is, That .509 Cam is a BIG cam...loads of overlap...Sounds good, but needs some other High Perf. mods to run well...

[firefighter3931]

the guy i got the motor from said it has a mopar purple cam with 509/292

You won't be happy with that cam using 3.23 gears ! 

I'd look at something a little bigger than the 262 Comp unless the engine has very low compression. 

The Lunati VooDoo 303 grind or the Crower HDP282 would be my choice. 

What intake manifold/carb are you using ? Power brakes ? Headers or manifolds ?



Ron

[billssuperbird]

stock 1969 intake / 750 el brock / no power brakes / stock hp manifolds / comporission 10 in half to one.

[firefighter3931]

stock 1969 intake / 750 el brock / no power brakes / stock hp manifolds / comporission 10 in half to one.

Bill, has that compression ratio been measured or is that what the seller told you it was ? Lots of piston manufacturers state 10.5:1 but that is usually incorrect. It would need to have a domed piston to achieve that C/R or the heads would need to be milled significantly if using a flat top piston. 



Ron

[billssuperbird]

it has flat top piston. the heads are 4406pack. i was told to use comp cam kit 21-223-4 and 355 gears.

[firefighter3931]

Bill, do you have a part number for those pistons ? There are several different flat tops available and the critical dimension is the compression height. The further the piston is down the bore....the lower the static compression. 

If you do in fact have 10.5:1 that cam will be too small to allow the engine to run on pump gas....assuming that is your intention. 



Ron