ghost cam

[mbray01]

Is anybody tuning to produce a ghost cam on gen III's. I see a bunch of guys doing it on gen IV's but nothing on III's I tried with the settings they used for IV's but tables are quite a bit different, so I basically guessed. I could not get it to work. Does it have to do with the sensitivity of the computer or am I just doing it wrong?

thanks in advance

[Joshtuning]

What do you mean by ghost cam ?

[RonSSnova]

I'd have to guess setting the idle timing, over under etc to make it "sound like" it has a cam......

[THE CHAD]

Mate to get the 'CHOPPY " cam sound you need to put a bigger overlap stick in it...plus if you modify the stock overspeed/underspeed tables you are inducing a unstable idle ....just my opinion mate but that is what you need to do, it is what it is.....cheers Bret ULTIMATE LSX TUNING

[mbray01]

that's what I am trying to do with the overspeed/underspeed tables. This weekend I successfully did it on a gen IV, even a gen V sierra, with success. Was just wondering if anybody has done it to gen III's. Was just wondering if sensitivity was higher on the later pcms.

[mbray01]

oh, and by ghost cam I am referring to producing a choppy idle within the settings, and still utilizing a stock cam. Basically just producing an aggressive cam sound without having to actually do it. I have been having quite a few customers ask if it was possible to get the sound without a cam swap, as they dont need the extra power, and dont want to loose fuel mileage and the drive-ability that comes with a cam swap. Aparently there are a few videos on youtube about this

[mbray01]

got it figured out, just needed to get way more aggressive with idle spark tables. for stock cam, sounds really aggressive

[Joshtuning]

Vids ?

[mbray01]

will get one uploaded

[mbray01]

stock 5.3 virtual camshaft. done within idle overspeed underspeed controls

https://www.youtube.com/watch?v=r8V0UfwGK5g


https://www.youtube.com/watch?v=kx8hL-Fn_wQ

[SSilver2K]

^ that sounds like poo

[mbray01]

well recording on iphone isn't best deff. sounds better in person. Now for a customer with a bone stock motor but just wants that cam feel, without everything that goes with a cam, it's hard to turn someones money down with small change on a stock tune

[Joshtuning]

That's true sounds awesome for customers that don't have the cash for a cam & they just want the noise

[johnm545]

It doesn't sound quite like the real thing but would probably fool a lot of people. Did you just crank up the idle spark over/underspeed? I might play with this on my car for a laugh.

[02statesman]

I don't hear any cam sound at all in that vid. All I hear is what sounds like a bad tune.

[mbray01]

most changes were in over/underspeed, cranking timing changes way out between +/- 40 to 50*gets real choppy, shakes the truck just like a cam. you have to turn off misfire recognition at idle speeds. also raise idle to about 700-800 for most chop. I agree does not sound just like a cam, but most of my customers coming in asking for it understand it wont replace a cam. Just sitting at a red light, it would fool most people.

[mbray01]

and as far as a bad tune. if its exactly what the customer asks for and affects nothing more than idle alone, driveability remains the same, is it really a bad tune? sheesh tough crowd

[SultanHassanMasTuning]

we always have to think outside of the box, nice work!

[RonSSnova]

Funny.
It's certainly not the tuners job to account for the taste of the customer!

[02statesman]

and as far as a bad tune. if its exactly what the customer asks for and affects nothing more than idle alone, driveability remains the same, is it really a bad tune? sheesh tough crowd

I never said that it was a bad tune, just that it sounds like a bad tune. Hey, if someone is silly enough to pay you to give them that kind of idle then give them what they want. I was just commenting that it didn't have a cam sound to me.