2-3* of KR at WOT 5k+ RPM

[zr0s]

Hello all,

I've got a 2000 Trans Am M6, with intake, long tubes, and full 3" exhaust. I installed the performance tune, and have been modifying it to get my fuel trims locked. At WOT, they lock in at 0, and at a steady 60mph cruise, they're at -1.86 to -.76. I'm not sure what they're supossed to be at idle, but mine usually hover at around -8 to -10. I live in CO, where the altitude is ~6500 feet, and the highest ocane gas available is 91. Anyway, at WOT, everything is fine (no KR) until about 5000 rpms and on. I've seen blips of 2-3 degrees. I also hear "pinging" then too. I've retarded timing 15% and I still get the same 2-3*. Could this be false knock? Should I try some octane booster and see if it goes away? I've also heard I need a custom tune for LT headers...

Thanks in advance!

[06MonteSS]

doesn't matter about at idle... sounds like you have them dialed in right where they should be... 0 to -2 range...

if you can hear it - it is most definitely not false knock. and yes, you should get a custom tune made up for the long tube's... Mike here at diablo should be able to getcha hooked up with that tomorrow or the next day... contact him...

what brand of 91 octane gas are you using?? you want to use mobil, exxon, sunoco, amoco or bp... and most definitely NOT shell...

[zr0s]

Cool, what's his email address?

Reason I asked if it could be false was because there is a small dent on my headers, so it must be hitting the car. Didn't know if that's what I was hearing under fulll throttle (kind of metal on metal tapping). I use Exxon 91 BTW.

What exactly makes up the custom tune? Is it settings that I don't have a available on my Predator or something?

Thanks

[boola1341]

I wanted to know the same thing about the custom tune. I also have longtubes with the ory. Do i just email mike and tell him what mods i have and he'll email me a tune. Or do i need a plug-in to hook the predator up to my computer??

[06MonteSS]

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