Have to get my upgrade & tunes....NOW

BlackSTX · #1 Sat, May 30th, 2009, 08:01 AM

I didn't expect to need to send in my Edge for upgrade right away, but as advised, I started to notice a hint of pre-ignition, obviously running too lean. Even with timing backed off a bit, and 91 octane, I still detected a hint on level 2. So, for now, I'm back to stock setting, with no hint of ping.
Of course, this means back to sluggishness and missing the spunk I had. Now to get this unit boxed up and into the mail, on it's way to Power Hungry. At least I'll have something to look forward to when it comes back.

JWBFX4 · #2 Sat, May 30th, 2009, 09:45 AM

You will not regret it! You will definitely enjoy the custom tunes I believe.

BlackSTX · #3 Sat, May 30th, 2009, 10:04 AM

I don't doubt it. Since it ran so good on level 3, I can only imagine it will be better when it's getting the proper fuel, and all other parameters are corrected for the mods it has.

DarrenWS6 · #4 Wed, June 3rd, 2009, 09:16 PM

What do you mean by pre-ignition? Did your start up have a little hesitation during start ups? And did it seem to slug on acceleration betweeen 1800 and 2200rpm in first gear. It has since stopped and seems to start and run finely now, but I'm still anxiously awaiting for my 87 perf. tune, because filling 93 is getting harder to do.

***Jackpine*** · #5 Wed, June 3rd, 2009, 11:22 PM

Darren, I'm pretty sure he was hearing "ping" (probably under load), if you read the first post carefully. I don't think he had the other symptoms you mentioned.

- Jack

DarrenWS6 · #6 Wed, June 3rd, 2009, 11:25 PM

Quote:

Originally Posted by JackandJanet

Darren, I'm pretty sure he was hearing "ping" (probably under load), if you read the first post carefully. I don't think he had the other symptoms you mentioned.

- Jack

Ok thanks. I should probably study these things further. I never understood what 'ping' is, is that when WOT and the rev limiter is bouncing off?

***Jackpine*** · #7 Wed, June 3rd, 2009, 11:38 PM

Quote:

Originally Posted by DarrenWS6

Ok thanks. I should probably study these things further. I never understood what 'ping' is, is that when WOT and the rev limiter is bouncing off?

No, "ping" is preignition. The fuel/air mixture is igniting just a tad too soon (before top dead center) and the expansion is happening too fast as the the piston is reaching the top of it's stroke. Basically, the gas is trying to expand just as the piston is doing its best to compress everything. The result is a sound that's like rattling marbles in a can. Once you hear it, you'll never NOT know what it is again.

Since the gas is expanding as the piston is trying to compress the mixture, there are severe stresses on the rods and the cylinder walls (mostly the rods, I think). It also heats things up quite a bit. A lean mixture can bring on ping, even when the timing is exactly according to specs. A "little" bit of ping now and then is no problem. But, heavy ping can destroy your engine. It of course also robs you of power, since the expanding gasses work against the desired movement of the pistons.

- Jack

DarrenWS6 · #8 Wed, June 3rd, 2009, 11:41 PM

Quote:

Originally Posted by JackandJanet

No, "ping" is preignition. The fuel/air mixture is igniting just a tad too soon (before top dead center) and the expansion is happening too fast as the the piston is reaching the top of it's stroke. Basically, the gas is trying to expand just as the piston is doing its best to compress everything. The result is a sound that's like rattling marbles in a can. Once you hear it, you'll never NOT know what it is again.

Since the gas is expanding as the piston is trying to compress the mixture, there are severe stresses on the rods and the cylinder walls (mostly the rods, I think). It also heats things up quite a bit. A lean mixture can bring on ping, even when the timing is exactly according to specs. A "little" bit of ping now and then is no problem. But, heavy ping can destroy your engine. It of course also robs you of power, since the expanding gasses work against the desired movement of the pistons.

- Jack

Thank you for the explanation Jack. I have a better understanding of this now, and have not experienced it and hope things stay that way.

BlackSTX · #9 Thu, June 4th, 2009, 05:39 AM

Jack, you explained it well. I actually seemed to be doing fine on acceleration, it was at a steady speed I was actually noticing it, and for a brief moment when you let of the gas to reduce some speed. Either way, it's not a good thing as it indicates a lean condition.

***Jackpine*** · #10 Thu, June 4th, 2009, 09:05 AM

Quote:

Originally Posted by BlackSTX

Jack, you explained it well. I actually seemed to be doing fine on acceleration, it was at a steady speed I was actually noticing it, and for a brief moment when you let of the gas to reduce some speed. Either way, it's not a good thing as it indicates a lean condition.

Odd that you hear it when you let up on the gas, because, as Cody pointed out to me once, you are really closing down the air intake then (in a gasser). I'm surprised you don't hear it on acceleration. But, hearing it at steady speed is not good at all, especially if it didn't go away when you backed off the timing.

- Jack