Fuse pull AFTER tune?

[Captain McFunk]

Hey guys, this might be a silly question but I'm not sure. I have the SCT Jannetty tune on my car right now, 93 octane tune. Well I went on a road trip and the highest octane I could find when stopping for gas was 92. Could this cause the computer to go to a lower octane table? Could this cause issues with the engine since the tune is for 93? It's almost all gone one and I'm about to fill up with 93, so hopefully it'll be okay, just wanted to check with you guys!

Thanks
-Adam

[IndeedSS1]

A fuse pull won't change the tune at all. And running 92 octane shouldn't cause it to switch to the low octane table.

[aj2ssrs]

I believe the high octane tables are copied over to the low octane tables anyway so in essence they are the same. Running 92 octane gas won't be a problem. I doubt that every time you fill up with 93 octane, you're actually getting 93. Depends how long the gas is sitting in their tanks. Make sure you go to a station that has high traffic flow, this should lower the chance of getting poor gas. I definately wouldn't put 87 or 89 octane in the tank, but you're fine with 92. The knock sensors will kick in and compensate.

[JANNETTYRACING]

Originally Posted by Captain McFunk

Hey guys, this might be a silly question but I'm not sure. I have the SCT Jannetty tune on my car right now, 93 octane tune. Well I went on a road trip and the highest octane I could find when stopping for gas was 92. Could this cause the computer to go to a lower octane table? Could this cause issues with the engine since the tune is for 93? It's almost all gone one and I'm about to fill up with 93, so hopefully it'll be okay, just wanted to check with you guys!

Thanks
-Adam

The Knock sensor constantly protect the engine so you have nothing to worry about.

Although I would not recommend racing your car on Lower than 93 octane fuel Normal driving is Fine.

A fuse pull does nothing with a tune.

Ted.

[IndeedSS1]

Originally Posted by aj2ssrs

I believe the high octane tables are copied over to the low octane tables anyway so in essence they are the same. Running 92 octane gas won't be a problem. I doubt that every time you fill up with 93 octane, you're actually getting 93. Depends how long the gas is sitting in their tanks. Make sure you go to a station that has high traffic flow, this should lower the chance of getting poor gas. I definately wouldn't put 87 or 89 octane in the tank, but you're fine with 92. The knock sensors will kick in and compensate.

That doesn't seem like a good Best Practice.

[Captain McFunk]

Originally Posted by JANNETTYRACING

The Knock sensor constantly protect the engine so you have nothing to worry about.

Although I would not recommend racing your car on Lower than 93 octane fuel Normal driving is Fine.

A fuse pull does nothing with a tune.

Ted.

Thanks for the info!

[PQ]

Originally Posted by JANNETTYRACING

The Knock sensor constantly protect the engine so you have nothing to worry about.

Although I would not recommend racing your car on Lower than 93 octane fuel Normal driving is Fine.

A fuse pull does nothing with a tune.

Ted.

Never really got a tuners opinion on the fuse pull. Ted, is the LS3 and L99 the same as far as the fuses? Or does the LS3 need a battery cable disconnect too?

[JANNETTYRACING]

Originally Posted by PQ

Never really got a tuners opinion on the fuse pull. Ted, is the LS3 and L99 the same as far as the fuses? Or does the LS3 need a battery cable disconnect too?

Fuse pull works on Stock cars.

[PQ]

Originally Posted by JANNETTYRACING

Fuse pull works on Stock cars.

Cool. That's what I figured. I assumed most tuners take the low table off.

[Slowhawk]

Originally Posted by PQ

Cool. That's what I figured. I assumed most tuners take the low table off.

I hope not. Good way to wreck a motor.

[JANNETTYRACING]

Originally Posted by Slowhawk

I hope not. Good way to wreck a motor.

ONLY if you modify and or disable the Knock strategy, too many tuners do this and it is dangerous..

And or if you Forcefully run it on 87 octane when it is tuned for 93.

Ted.

[IndeedSS1]

Originally Posted by Slowhawk

I hope not. Good way to wreck a motor.

Agreed.

That's a safety net. What about the accidental bad gas, or someone unknowingly putting 87 in. On some platforms, MAF sensor failure will default to the low octane table. There's a reason GM doesn't rely on the knock sensors only. If one runs good 93 all of the time, there is no reason to ever worry about the low octane table anyway.

So making the low octance table the same as the high has what benefit under what circumstances?

[JANNETTYRACING]

Originally Posted by IndeedSS1

That's a safety net. What about the accidental bad gas, or someone unknowingly putting 87 in. On some platforms, MAF sensor failure will default to the low octane table. There's a reason GM doesn't rely on the knock sensors only. If one runs good 93 all of the time, there is no reason to ever worry about the low octane table anyway.

So making the low octance table the same as the high has what benefit under what circumstances?

Agreed.

[PQ]

Originally Posted by Slowhawk

I hope not. Good way to wreck a motor.

Originally Posted by IndeedSS1

Agreed.

That's a safety net. What about the accidental bad gas, or someone unknowingly putting 87 in. On some platforms, MAF sensor failure will default to the low octane table. There's a reason GM doesn't rely on the knock sensors only. If one runs good 93 all of the time, there is no reason to ever worry about the low octane table anyway.

So making the low octance table the same as the high has what benefit under what circumstances?

Ok, so terminology.

My point was a good tuner will set it up so as to not need to pull the fuses.