Originally Posted by spikestang

They dyno'd the c8, 440 rwhp,and 408 tq.

Originally Posted by HioSSilver

Lt2 will actually run 10s tune only

Originally Posted by spikestang

remember when coyotes did that in 2011?

Originally Posted by CamOnlyJabroni

An idiot put lawnmower gas in his Lingenfelter 800hp package ZO6. Just wanted to make it to the gas station. It blew up. Low octane table didn’t save him. Was told this story by an employee when dropping my engine off to get built.

Originally Posted by kinglt-1

If you read the owners manual it says to only use 91 or higher premium fuel. 87 octane can be used in the event where you can't find premium fuel to get from point A to B but you shouldn't race the car with 87. The low octane timing tables are not designed for running 87 octane. The ECU will default to the lower octane table depending on the amount of spark knock detected but that doesn't mean it's safe for track day. Mystery 87 could be bad enough that the low octane tables do not have enough timing pulled to keep from getting KR. The LT1 is 11:5.1 compression with very high DCR. That is why it gains 25-30whp on E85 because the engine can not even reach MBT on 93 pump.

Originally Posted by kinglt-1

Taken from a 2016 Camaro SS manual... page 236: https://justgivemethedamnmanual.com/...owners-manual/

"If the vehicle has a 6.2L V8 engine, use premium unleaded gasoline meeting ASTM specification D4814 with a posted octane rating of 91 or higher. Regular unleaded gasoline rated at 87 octane or higher can be used, but acceleration and fuel economy will be reduced, and an audible knocking noise may be heard. If this occurs, use a gasoline rated at 91 octane or higher as soon as possible. Otherwise, the engine could be damaged."

Originally Posted by kinglt-1

Taken from a 2016 Camaro SS manual... page 236: https://justgivemethedamnmanual.com/...owners-manual/

"If the vehicle has a 6.2L V8 engine, use premium unleaded gasoline meeting ASTM specification D4814 with a posted octane rating of 91 or higher. Regular unleaded gasoline rated at 87 octane or higher can be used, but acceleration and fuel economy will be reduced, and an audible knocking noise may be heard. If this occurs, use a gasoline rated at 91 octane or higher as soon as possible. Otherwise, the engine could be damaged."

Originally Posted by CamOnlyJabroni

Looks like the decision of spirited driving and 87 octane is pretty white and black to me.

Originally Posted by Prototype007

Neat.

Doesn’t change the fact that GM was ahead of the curve on this one and knew there would still be people filling up with 87 fuel, so they implemented counter measures in their tuning.

Originally Posted by CamOnlyJabroni

Yea enough measure to where engine damage can still occur. Looks like they are relying on the owner to read and have some competence with owning one of their performance vehicle.

Originally Posted by Prototype007

You have too high of expectations of the average consumer.

Originally Posted by HioSSilver

The lq4 in my 2500hd runs better on 89 or 93 vs 87. Especially if the tune is appropriate for the octane