Do you want DOD/AFM to come on the Camaro?
:lol:I dont see how it could lose 20 hp or any for that matter. That guy must be thinking parasitic mechanical loss from more components, which still isnt warranted with modern DOD/AFM. From my understanding the DOD/AFM is mostly electronic not mechanical.
The first DOD technology, to deactivate a cylinder, the exhaust valve is kept from opening after the power stroke and the exhaust gas charge is held in the cylinder and compressed during the exhaust stroke. After the exhaust stroke, the intake valve is kept from opening. The exhaust gas in the cylinder is expanded and compressed over and over again and acts like a gas spring or shock. As multiple cylinders are shut off at a time (cyl. 1, 4, 6 and 7 for a V8), the power required for compression of the exhaust gas in one cylinder is matched by the decompression of imprisoned exhaust gas in another cylinder. When someone needed to kick ass on the green light, the exhaust valve is reactivated and the old exhaust gas released during the exhaust stroke. The intake valve is also reactivated and traditional engine operation begin. GM was the first to use existing production engines with this system with the introduction of the Cadillac L62 V8-6-4 in 1981. With that system I can see parasitic mechanical loss.
The electronics side was improved with Electronic Throttle Control, electronically controlled trannys, transient engine and transmission controls, engine emissions controls, and vastly increased computing power. A solenoid control valve assembly in the engine valley cover contains valves that provide a pressurized oil signal to specially designed hydraulic roller lifters provided by Eaton Corp. and Delphi. These lifters disable and enable exhaust and intake valve operation to deactivate and reactivate engine cylinders. Unlike the original system, only half of the cylinders can be shut off. This system uses engine oil to hydraulically control engine valve function. GM used this second system (now called Active Fuel Management) to be available on 2005 Envoy XL, Envoy XUV and TrailBlazer EXT using optional Vortec 5300 V8. GM also used AFM on the LZ8 V6 in the Impala and Monte Carlo.
Im in favor DOD/AFM if it can be retained after a tune after mods. I dont see it being a issue though, as long as tuners/shops dont get lazy and delete the function or refuse to work around it.
There really shouldn't be any HP loss from the new system.this is pretty new to me. so someone thinks the new g8 is robbed of 20hp due to a computer restriction??? explain this, never heard of this except that the caddy's can shut 4 cylinders off and the camaro may be able to do the same. thats all i heard.
With the new system made in the recent decade shouldnt have any power loss. I think it more like lower compression (vs.LS2), lower octane tune, and prolly a milder cam spec, to contribute to a lower Hp vs LS2.this is pretty new to me. so someone thinks the new g8 is robbed of 20hp due to a computer restriction??? explain this, never heard of this except that the caddy's can shut 4 cylinders off and the camaro may be able to do the same. thats all i heard.