Going for first dyno -does gas octane matter?

[GTzViper]

Hi guys!

I hope you can help me out. I have a '96 GTS with smooth tubes, K&Ns, Belanger exhuast and headers, and high flow cats. This is my first dyno and I would like to get the best results that I can. Any suggestions and does gas octane effect the hp? Thanks for your help.

 

[Doug Supercharged Vipers]

As long as you DON'T have a higher compression engine or a detonation problem, higher octane won't help you. As a matter of fact, it will hurt your performance.

Stick to 93 octane fuel.

Hope you do well!
Doug

 

[PhilC]

Good luck. Keep us posted on your results.

 

[phiebert]

I was going to ask a similar question today so if you don't mind I'll tag along on this one. I usually run 94 octane. Today my buddy gave me a ride in his Cessna and filled up with 100 Octane. He said if I wanted to try some in the Viper the airport would happily sell me a tank full. So what would that do for me if anything? I'd like to try it but can it do damage?

 

[Joseph Dell]

As long as the gas is unleaded, you shouldn't have a problem. But then again, it won't do you any good unless you bump up the timing or are running a boosted application.

With 93 octane right now, I have to take some timing out while under pressure (Supercharger) but with 100 octane, I don't need to take out timing... car runs like mad with no timing taken out [and it ain't too bad with some timing taken out either... ]

On the other hand, I don't have race fuel nearby, so I have started using VP Fuels octane booster... it is suppose to add 7 Octane pts to the gas in one concentrated shot. I picked it up a bottle at AutoZone for 9.99 when I was picking up oil + filter for this weekend's event [which I never got to]...

Anyone heard anything about that VP product?

Joseph