niphilli

Hello all


I will be doing an LS7 'old man' / reliability build over the winter.

There are a lot of camshafts offered now in the 22X/24X range on 116LSA with a wide variety of lift (.61X-.67X).

Is there any evidence out there that the more aggressive ramp rates are providing a significant benefit in HP/TQ?

Take for example the Katech torquer on 116 vs the AHP 116 cam (which uses the less aggressive Cam motion lobes I believe)?

with the LS7s valve train geometry reputation I don’t care to stress the guides/valves/springs for a Just a few HP.

thoughts?

Floorman279

iTrader: (11)

new metal guides and a quality aftermarket roller rocker should basically eliminate all your worries. only problem is a good rocker isn't cheap. but neither is dropping a valve.

ddnspider

iTrader: (26)

In many instances, the opposite has been proven. Softer ramp rates reduce harmonics and led to a more stable valvetrain that made more power.

99 Black Bird T/A

iTrader: (4)

If the valve train, lifters etc are fully optimized to deal with the aggressive ramp rates I think its possible to see a small gain from aggressive ramps in some cases. Now as to the question of if its worth that's another story as springs, retainers will need to be checked and replaced more often.

Brian Tooley owner of BTR & founder of TEA did a lot of testing and in short found good smooth aggressive lobes make better power most of the time than super aggressive lobes that violently jerk valves open and slam them shut.

Probably the best bet is to contact a vendor like Cam Motion that can help you select the best lobe for you project. There are a lot of fast smooth lobe designs now that make excellent power and aren't too hard on the valve train.

.My .02 of actual experience testing lobes back in 2002..

Twin_Turbo

iTrader: (9)

Since youre not squeezing every last bit and want reliability I think you have made your decision.