Comment on cam selection
 

Duration: 296 degrees I
277 degrees E

Lift: .470I
.440E

Lobe separation: 102 degrees

Carb'd motor, 3.2SS

What are the other parts in the engine?

3.2 heads
46 PMO
10.5:1
Twin plug
Headers (still figuring out)

Toddu,

Cam numbers are advertised? Or @1mm or @.050"? Makes a big difference.

It appears to be a S type of cam. Should be a nice fit for the 3.2

Also pretty close to a Webcamshafts 120/104. Have that in a carbed 3.2SS and carbed 3.3SS and works well.

Was a little worried because the specs vary a bit from what's listed on Elgins site for mod-s. Just don't want to get something that isn't exactly right.

Toddu,

Not sure you will ever find the exactly correct cam. So what RPM range do you want to run the motor in? What is the aplication? I am guessing a track car not street but you never know.

Toddu, I'm building a 3.0 with the Elgin modified S cams and I agree they are very near what you are using. Piston are Ross 10.5 and will use webers.
I'm puting the engine behind a 901 gearbox. It is my understanding these cams will give improved driveablity over the std S cams. Elgin calls for a 4.5mm lift at overlap, what is recommened for the cams you have.

The web 120/104 is a popular grind, most peeps I spoke with love it, a nice compromise between a street and race cam. It's not a very high lift but it is long duration.
I'll be running it as well.
Web does a nice job, at first I thought they must have used new billets, till I barely noticed a weld line on one of the lobes.

And what would be the effect of slightly higher lift and duration on exhaust? The above numbers are slightly different on the exhaust side than what Elgin posts for mod-s cams.

Todd

No two custom grind cams numbers will be the same, that would be just blatant copying. I doubt if a hair more lift or duration will make a huge difference by the "seat of the pants" dyno.

You have to be 100% honest with yourself on the primary use of the engine/car.
Street? Street with the odd AX? Full race?
Even with street... is it city street or country street? Big difference.
No such thing as a perfect cam, you will have to make a compromise. You lose HP for driveability...you lose driveability ( and idle) for HP.

If you are not 100% honest with yourself about how you will drive your car, then most likely you will be disappointed with your cam choice.

My twin plug 3.0 used JE 10.5:1 pistons in stock cylinders, '78 SC heads, headers, 46 mm Webers and GE 60 cams. Made 237 RWHP (279 crank)and a ton of torque. Drove like a stocker until 3700 rpm then pulled to 6800 like a jet. Perfect in my opinion.

The GE 60, DC60, Mod S, 120/104 are all a very similar spec cam. Pick your flavour.
SmileWavy

Had a web Cam 120/104 in my 2.6 SS, was happy with it but flattened out a bit too early for me. Changed it out to a DC-62 and it pulls hard to 7800, go's flat to 8K and then dives off. The extra 600 RPM climb picked me up some HP hitting 266 RWHP.

In my opinion, if you have a short stroke, go for the most RPMs you can/are able.

Good Luck,

Jimmy