Whats highest octane we can use on a Viper?

[BACKNBLACK]

Just curious.I have a place to get CAM2 106 octane. How safe is it, do we need to mix with lower octane?? If used straight up, can you damage valves??

 

[Snake Bitten]

Leaded fuel, used straight up, will foul your O2 sensors, clog your cats...And would be a total waste of money, unless you have power adders that would require additional octane ratings to prevent detonation...can't see any damage to your valves...

I have found 93 Octane to be about perfect for a relatively stock viper...

 

[SUN RA KAT]

I have VEC2 cards for 91, 93, 94, & 100 octane unleaded gas. I found the 94 octane gas with the 94 octane VEC2 card to be a noticable improvement over 93 octane with the 93 octane card. I go to Sunoco for 94 octane.

Viper Days at Mid Ohio Sports Car Course will have unleaded 105 octane...

 

[Snake Bitten]

I'd say Kenny has a "power adder"....

 

[Warren S]

I agree with Gerald. If it's leaded, don't run it in your Viper! It will do more harm than good. Then there comes a point where too much octane w/o the necessary higher compression ratio will lose, not gain hp. However, that CAM2 106 should be perfect for vintage muscle cars, say, your '70 440-6 Cuda.

93 octane or 94 Sunoco should do fine. We only have the crappy 91 here in the left coast.

 

[joe117]

I'd say don't use leaded gas such as Cam2. I don't think it's worth the possible damage to the O2 sensor and the cats.
However, I wonder what the limit is as far as leaded gas. Will 6 gallons put in for the drags, one weekend a month, do any damage? I don't know. I'd steer clear untill I found out.

 

[jimandela]

i only run Sunoco 94 on a stock 2001 motor no problems and runs great!
but the car is yellow

 

[GaryA]

I run 93 octane on a 843 rwhp supercharged Viper and it runs GREAT!!

 

[pauls]

Over octane is a waste of money. Your computer can only advance the timing so far.(Even with a VEC 2) I've tried VP unleaded 103 and I think it slowed the car down. It's a black art, how octane and gas is formulated. Cylinder pressure, speed of flame travel and many other variables all play a role. The majority of Vipers (NA) run very mild compression. I don't think race gas has any effect.