Shark Injector??? How do I Tell???

[kayger12]

PM headed your way, Bruce.

Droid X. Tapatalk. Use it.

[zhpnsnv]

So what do we know about the Shark? What exactly does it do to timing/fuel mixture/etc... in order to increase power? Also, does it increase power, or does it increase throttle response (or both)?

[Marcus-SanDiego]

Marc, I think this was an informative threads on the Shark. http://www.zhpmafia.com/forums/showt...ctor-Installed

[zhpnsnv]

Read the thread and any FAQs I could find. Still a mystery as to how the power is found. Maybe I'm the minority, but I'm interested in the "how" as much as the "what" of these gains.

[Hornung418]

Simplest terms: the AFR is lowered and the VANOS timing is adjusted. Typically, a production car is let off the line with an AFR of about 14.7:1. The Shark Injector leans that ratio out so more air is in the chamber at the time of combustion. It is adaptable to mods and if you add a CAI or something to that nature, it will run even leaner for a bit till it finds the balance of the new setting. I'm not sure what that ratio is, however. The VANOS is a whole other mystery. VANOS is variable to +/- 6 degrees of advancement or retardation of the Camshafts; JC's Shark Injector somehow alters the stock setting so that with the 500/200 rpm increase, the engine can make the most of what it's got. With the DBW throttle, I'm sure there is a slight increase of response to that as well.

Hope I was of help

[zhpnsnv]

So let's say I like to drive on the track - is leaning out the mixture a safe thing to do?

[kayger12]

From some digging I was doing:

It has been dyno-tested to provide a safe increase in power by altering fuel enrichment, cam timing and ignition timing specifically for use with premium gasoline. Not only is part-throttle fuel and spark re-mapped, other areas of chips other tuners don't touch are re-mapped - such as acceleration enrichment, transition fueling, how the car responds to rapid change in pedal, and VANOS control as needed to optimize the vehicle for operation on premium fuel

[spencers]

Start with headers and a Euro2 DME flash. Shark will still be present after the Tune, I believe.

No, it'll overwrite the shark.

[Hornung418]

No, it'll overwrite the shark.

Unfortunate for Keith

Spencer, are you aware if the same is true for the opposite?

RootedDROIDXstatus. Come at me, bro.

[Crickett]

So let's say I like to drive on the track - is leaning out the mixture a safe thing to do?

I wouldn't see why not; as long as you're running high enough octane (92+), leaning shouldn't hurt.