Which of these two cams for my setup??

[allcarfan]

The setup:

331 stroker
TW heads that flow 290/212
1.6 RR
Vic Jr intake
650 speed demon carb
3/8" fuel line with a high flow mechanical pump
3.50 gears in a 9"
3300-3500 TCI stall in a built C4
Car weighs about 2700 lbs
Engine should be able to spin to 6500+ no problem (lightweight internals w/ girdle and ARP bolts/Studs)

Two cam choices:

Xe274HR
Specifications:
* Advertised duration: 274 intake/282 exhaust
* Duration at .050 in.: 224 intake/232 exhaust
* Gross valve lift: .555 in. intake/.565 in. exhaust
* Lobe separation: 112 degrees
* RPM range: 2,200-6,200
* Needs 2,500 stall, 3.55-3.73 gears, better heads, intake, and fuel system

-OR-

Xe282HR
Specifications:
* Advertised duration: 282 intake/290 exhaust
* Duration at .050 in.: 232 intake/240 exhaust
* Gross valve lift: .565 in. intake/.574 in. exhaust
* Lobe separation: 112 degrees
* RPM range: 2,600-6,500
* Street/strip, needs EEC IV upgrade, heads, intake and gears

Car is NOT a daily driver. It will see a little bit of cruising time and thats about it. MIGHT be raced a few times once the engine is broken in just to see what times it pulls, but thats it.

Let me know what you all think. Or should I post this in race tech?

Shane

 

[BillaMustang]

I say neither one of those cams..

I vote for either a AFM N-91 or a FTI cam or even a custom Comp.

I just called Comp for a cam and I'm building a 331 carbed, AFR 185's etc. And told them I wanted to shift in the 6500 range and they gave me this.

Advertised/ 294, 297
@.050/ 244, 248 with .579, .584 lift all on a 110.

Try to get a cam to work with that nasty Victor JR intake!!

 

[wildstang347]

my thoughts too, intake is designed for serious RPM's and those mild cams are gonna hurt power production, dec issue of popular hot rodding they had a intake shootout on a 347 and it showed by the dyno sheets listed the victor jr. was out of its element below 6000 rpm and the new air gap series carb intake produced more power than the fuel injected intakes even just sacraficeing a few ftlbs torque is all.
the victor performed badly with the mild cams below 230 dur. at .050 and comeing alive with more duration, above 240

 

[ashford]

id go with a step or two higer than what you asked about with a closer lobe seperation. you flow numbers are really high too small of a cam would kill the engine at higher rpm's and no low end torqe with those numbers. with your situation a cam too big would be better than a cam too small. also you may not have enough carb for above 6000 rpm. a 331 takes cams differently that a 302