tunnel ram / cam combo lowdeck opinions

moparwedge said

I have a tunnel ram with 2 holley 670 cfm vac secondary carbs. I have narrowed down to 2 hydraulic cams.

Xtreme energy 230/236 @ .050 - lift 488/491, 1800-6000 rpm, 2200 stall recommended, 110 lobe sep

Thumpr 227/241 @ .050- lift 486/473, 2000-5800 rpm, 2000 stall recommended, 107 lobe sep.

this is a street car 400 cube in Duster.

Click to expand...

Out of your 2 choices, the first one.

IMO Neither cam will run 5800-6000 in a low deck. I also completely disagree with the recomended stall speeds. Way too low. My pickup truck flashes to 1700...

2 440's both built witht he same 242/528/112 cam made peak power at 5600 and 5800 respectively. Same RPM heads, the only difference was the size of the carb.

If you MUST run that tunnel ram pick a cam that works in it's RPM range and has a wide LSA (110 or higher) In regards to lift. There is no reason to open the valve further than where the heads will flow.