How? Why? Lol

[gimmie11s]

The cool thing is that what now happens at 700 rwhp used to happen at 350 rwhp (25 years ago).

Exactly!

I think a gen 2/3 would live almost forever at 650 or so.

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[engineermike]

I’ve been considering dropping to the 4.25” pulley for that reason. I figure it’ll still make around 600-630 at 7-8 psi, be more reliable, not lose as much in summer heat, and perhaps have some semblance of traction.

 

[Beano]

Detonation. There's melter aluminum. All over in that picture. It cracked the top of the Piston.

In full agreement. You can see the effects both sides of that defect.

The fact that you mention that the engine has been smoking on start-up sometimes....well, if it was blowing oil past the rings under power, that will drop the octane rating a fair bit, causing that cylinder to detonate itself to bits...

 

[robmustang201528]

Will running 100 octane keep you save? Its expensive as hell but I'm able to put my hands on it. I was mixing 110 with 93 but 110 is leaded and even though I'm mixing it with 93 I dont want it to fuck up my 02 sensors. So I'm thinking about running 100 stright. Maybe 3 or 4 gallons

 

[SolarFlare]

Simple. I don’t race the car or beat on it on straight 93. I don’t trust it. When on 93 and I’m feeling froggy I put 1 can of octanium for 10 gallons or so of 93. Call me paranoid, I know it’s tuned properly on 93 but I don’t trust the fuel.

 

[Woopaloop]

Will running 100 octane keep you save? Its expensive as hell but I able to put my hands on it. I was mixing 110 with 93 but 110 is leaded and even though I'm mixing it with 93 I dont want it to fuck up my 02 sensors. So I'm thinking about running 100 stright. Maybe 3 or 4 gallons

I run VP 101, luckily I have pump nearby for 7 or so a gallon. I'm going to tune for it once I get a chance to get a dyno.

 

[schmeky]

I’ve been considering dropping to the 4.25” pulley for that reason. I figure it’ll still make around 600-630 at 7-8 psi, be more reliable, not lose as much in summer heat, and perhaps have some semblance of traction.

Exactly. That's why after reading situations like this many times, a pulley up on a Whipple Stage 1 makes perfect sense. 600-630 rwhp is plenty, especially considering the God awful roads in my State. It's difficult enough to find anywhere to let my 2018 GT "run" as N/A and not be dangerous anyway.

 

[robmustang201528]

I run VP 101, luckily I have pump nearby for 7 or so a gallon. I'm going to tune for it once I get a chance to get a dyno.

VP 101? 101 octane?

 

[Woopaloop]

VP 101? 101 octane?

Yea.

 

[Nuked]

I’ve been considering dropping to the 4.25” pulley for that reason. I figure it’ll still make around 600-630 at 7-8 psi, be more reliable, not lose as much in summer heat, and perhaps have some semblance of traction.

Exactly. That's why after reading situations like this many times, a pulley up on a Whipple Stage 1 makes perfect sense. 600-630 rwhp is plenty, especially considering the God awful roads in my State. It's difficult enough to find anywhere to let my 2018 GT "run" as N/A and not be dangerous anyway.

I agree with this 100%. You are still almost doubling the factory power rating especially on pump gas.

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