Heres a thought on passing emission test

[Longshot270]

Hehe, I was wondering where my last post was going to make this thread end up. Now I'm glad I did go out on a limb with a very basic question. I think we got some useful information for what would have been a deadly question on many of the other forums. I like having the "best case scenario" play out here, even when I had already suspected the answer.

Haha shotgun, I know what its like. If I clicked "submit" to every reply I almost made, I would probably have a thousand posts.

[88Racing]

Originally Posted by longshot270

Hehe, I was wondering where my last post was going to make this thread end up. Now I'm glad I did go out on a limb with a very basic question. I think we got some useful information for what would have been a deadly question on many of the other forums. I like having the "best case scenario" play out here, even when I had already suspected the answer.

Haha shotgun, I know what its like. If I clicked "submit" to every reply I almost made, I would probably have a thousand posts.

That definately would have been a "Fresh Meat" post in some of the other forums.
But in some of the other forums and their mile long threads it's hard to learn and utilize anything due to the thread crappers and other BS antics that goes on in them.
Good thing we are NICE around here!

[Longshot270]

Originally Posted by 88Racing

That definately would have been a "Fresh Meat" post in some of the other forums.
But in some of the other forums and their mile long threads it's hard to learn and utilize anything due to the thread crappers and other BS antics that goes on in them.
Good thing we are NICE around here!

...and intelligent, thats the biggie!
Hehe, yeah I figured that a "Fresh Meat" post would lure the Mintaur out while we all get to feast on some juicy information.

^....hey, sounds lame now but I guarantee it seemed pretty good when I typed it the first time.

Any other secrets about the tunes in reguards to drive cycles and emission?
(...or like which button combination to push to make jet engines come up and light for some extra passing power?)

[88Racing]

Originally Posted by longshot270

...and intelligent, thats the biggie!
Hehe, yeah I figured that a "Fresh Meat" post would lure the Mintaur out while we all get to feast on some juicy information.

^....hey, sounds lame now but I guarantee it seemed pretty good when I typed it the first time.

Any other secrets about the tunes in reguards to drive cycles and emission?
(...or like which button combination to push to make jet engines come up and light for some extra passing power?)

Looks like your truck!

http://m.youtube.com/index?desktop_u...ient=mv-google

you asked and you shall receive!

[Jackpine]

Back to another question for the Mad Doc, (if he sees this).

Since timing can be "corrected" (I won't use the term "controlled", because that's not how I see things working) by the knock sensors, what is the danger in overadvancing the timing? I get the feeling it's not a "cure-all" for sloppy timing adjustment. But, why not?

- Jack

[Power Hungry]

The reason it's best to use the knock sensor as an "emergency relief valve", so to speak, is that when the knock sensors detects detonation the PCM pulls out a HUGE amount of timing in one shot to protect the engine. This will have a significant impact on performance and economy. It is much better to go with a slightly less aggressive curve that doesn't cause detonation than it is to push the limits.

One other thing to consider is that some of the earlier engines DON'T have a knock sensor to compensate for sloppy timing curves. Obviously, things can go wrong quite quickly in this type of situation.

[Jackpine]

Thank you sir! Makes perfect sense.

I asked, because again, some people on f150online have suggested it's "no big deal" if the timing is overadvanced, since the PCM will just pull timing if knock is detected. Didn't seem like a good approach to me, but I couldn't say why.

- Jack

[88Racing]

I'll just throw this in for you guys to chew on also.
With the Harley tuning software you can turn off the knock sensors. You can also turn off the heat management system.
Some bike tuners will often use these in the off position when tuning a bike on a dyno for more "true" readings.
But when done they turn them back on. Sometimes they forget.

[Power Hungry]

You want to know something funny? I've seen gas tunes from prominent tuning companies that have the knock sensor offsets set to 0 degrees adjustment. Yes, that's right... ZERO! Even worse? This was on SUPERCHARGED vehicles. I guess there isn't any need to have the knock sensors functioning on a supercharged application. What do I know.