#Overkill supercharger mod

#1, Elite Engineering would be best to describe how and why its still needed. Will recommend consistent fuel cleaners used to ensure the cylinders and plugs stay clean.

However you can certainly request that it stay enabled and I'll oblige. I don't anticipate most seeing a loss in mileage. Only under coasting and the lightest of throttle applications could it stay active. Tuning hundreds of LS4s in particular, I get many tune customers for the simple procedure of disabling the AFM system, and it fixes the issues of excessive oil consumption by having it run in on all cylinders all the time.ĭuring testing, I struggled mightily to keep the engine in AFM. It's a simple inevitable in the majority of cases. Regarding #2, the up and down motion eventually creates a vacuum that will draw oil up from the crankcase as the engines start to wear.

but DOD, even with just losing 2 cylinders definitely makes a noticeable impact on mileage and it would be a shame to lose that option (i can switch mine on / off by switching between sport and touring due to my tune). So yea, most of the catch can systems out wont have that extra vacuum setup because it's not needed.Įdit: also, yes, super jelly i dont have a SC'd v6. It shouldn't be possible to build up positive pressure otherwise since it's supposed to vent to the intake (which is always low or at ambient air pressure). My only issue with #1 is that building up pressure in the PCV system is only possible when you're boosting the intake and the pcv is dumping into that boosted portion. There shouldn't be a vacuum or there would be no spring action and the system wouldn't work correctly. The way the DOD is supposed to work in the Lgx is it traps air in the chamber and the piston will use this to spring up and down as the crank rotates. My bottom line is I have no concerns about engine life on our supercharged setup, once the setup is fully tuned, running 91 octane or higher only, and if running synthetic oil and properly following maintenance intervals. Disabling DoD is a positive improvement in engine life, for a small negative in fuel mileage. Look on truck or LS4 discussion groups and you'll see mention of a puff of blue smoke on the highway when it reactivates, it gets that bad as the engines age. This vacuum will suck oil up above the pistons and then burn it when the cylinders reactivate. While I understand and appreciate the intention of DOD, what it does when active is close both the intake and exhaust valves, which combined with the constant up and down motion of the pistons creates a vacuum in the combustion chambers. This will help prevent the buildup of positive crankcase pressure which can blow oil past the control rings and into the combustion chambers, and catch and collect oil vapours.Ģ) For automatics, the Overkill tuning will disable the displacement on demand. The combination of intake manifold vacuum and supercharger inlet vacuum will continue to draw a vacuum for crankcase air, and is compensated for in the tuning. Unlike all current LGX catch can systems that I'm aware of, the Overkill supercharger system will reintroduce a vacuum sourced PCV system that was eliminated from factory. There are a few ways that this kit will improve engine life though over doing nothing at all:ġ) The catch can system. Mandating this requirement is good for engine life. Just about any synthetic is good if you change based on the factory oil life counter or sooner, I run Amsoil. If you're not running synthetic oil, you should be with a supercharged vehicle, you absolutely should. I don't anticipate any increased fragility from the LGX, nor would I suggest it will hold more horsepower, but I will suggest that it should be just as happy holding the power of our base supercharger kit without issues of piston failures or connecting rod failures etc. We know however on the LFX that it's very happy holding the horsepower numbers of 400-450 wheel horsepower, from the cars that have been supercharged for a couple of years with the old discontinued system.

#Overkill supercharger mod

Do you have any expectation for degradation of internals for a daily driver ? I understand you are putting more stress on the engine so please don't reply with mod at your own risk or whatever I am more looking for reliability of supercharging a daily and what to expect to break first if its going to kind of answer.Īny mod will decrease the overall life expectancy of an engine, must start with that simple fact.