Motor will be a 4.25 stroke 0.030 Source kit. CNC Source heads cut 76cc , around 11:1 comp,stock port size . Victor or M1 single plane (have both)with Prosystems HP1000 . Do have a dual quad Modman and 1050 dom i could run with adaptor . 5000 stall , 4.1 gears , 28" radial slick . 68 Satellite 3660lbs with me .
Narrowed to 3 choices :
Comp cam #23-634-5 , 305/320 advertised 279/287@050 , 650/630 lift , 110 lobe seperation
Howards #720.21208 , 302/308 , 274/280 , 643/659 lift , 108 lobe seperation
Lunati #30230918 , 308/316 , 279/283 , 617/632 lift , 106 lobe seperation
Car is bracket raced , plus is my daily driver .
Anyone run these ? . Or are they too somilar to worry ? Is nitriding the cam a good idea ? I will use Howards edm lifters .
Any imput appreciated .

Tex

Top one`s too big for that comp and the others MAY be cos I`m at 276-281 @ .050 at 12.1.1.............

That Comp is in my brother's Edelbrock Rpm headed 493, 11.4 to 1. Replaced a 300/.639 Howards, and solved some of the detonation issues he was having while driving on the street with 91 octane in the tank. He really likes it on the street.

Aside from bleeding off pressure, how was the torque down low and mid........?

About the same as the Howards. We hurt the launch with a tighter converter, but the mph was the same, it's far from sorted out, Weiand tunnel ram with 750's. 11.04-121, 3850lbs, and less aero than a 4X8 sheet of plywood.

NORMALLY you`d think the relatively low comp wouldn`t favor that much duration and my car falls in that same category, but again, more "myths" debugged...........I know they can run strong this way but I also know efficiency CAN become less than desireable unless you make up for it w/converter and gears and in some case rpm.

Dom ,
don't you run 470ci and a roller ? sorry if I am wrong .
my understanding is to go 2-3 sizes bigger over your 440ci choice when going stroker . I have 293adv,258@050 cam in current motor .
Billy ,
I did see your input in the other threads . Yes I also run 98 pump gas . I am in the 120/122mph range now . but a little inconsistent et wise .
I am hoping for around 615/625 flywheel HP
I should hope to not shift above 6500 , I shift at 6000 now

Tex

Dwayne Porter nitrided my solid flat tappet for me and I would say its a good idea. I also run the EDM lifters. My solid flat tappet is 264 and 270 @ .050 with .585 and .592 lift and a 110 LSA. And my eng is 10.6 comp as it runs fine on 92 pump. Ron

I agree w/Ron regarding nitrating. I also went that route and used the Comp Cams EDM lifters. Just good insurance.

Not enough head for those cams.Saying it in a nice way not to hurt anyone feelings.

Scrap...the problem is not enough head for the cubic inches, hence the need for that much duration. Can't wait to try that Comp grind with some nitrous...

Yes sir .680-.660 and I do like to step up the dur. but I have 12.1.1 and will go to 13.1.1 next time to better utilize whats there.......

I had heads that flowed 375 @700 511 cid 3100lb car on alky .714 lift 272 278 @50 run 8.70.maybe AndyF will chime in.He's up on all that stuff

If those are the only choices I would run the Howards cam and install it at 102 to 105 intake lobe center With that weight and pump gas the motor needs to make all the power it can in the first hundred feet to get it to E.T. like you want

Run the Lunati if you have to pick from one of those three. The tight LSA and big duration will hurt the low end, but you have a 5000 converter and 505 ci. It will also come on like a freight train in the mid range and fall off early because you have a limited cylinder head and 505 ci. And finally, it doesn't matter if it falls off early because you have 4.10 gears and 505 ci. You also want to drive it daily, so you might as well make better mid range peak power where you can use it, than better average power where you can't.

You know i love your car Ron . I will try to call Dwayne next week for his recommendation .
Thanks for all input , a lot to consider .
To clarify , these are flat tappet not roller cams. Sorry if this wasnt clear .

Tex

I tend to agree with thisview, especially if the heads are stock. Anything above .600 lift will not be the best choice.

Ragnar

I agree to a point about peak head flow being the limit that`s why I go bigger in lift and duration that way I pass the peak on opening and closing and believe P-body does the same thing iirc.......

Thanks for the kind words. And I love your car and how good it runs now. I am sure its gonna run real strong with your new combo. Dwayne is a good guy and will treat you right. Ron

If this combo goes 10.50 I will be impressed. Good luck to you.
Doug