89 Octane Performance Tune?

[HappyWino]

I am in California so to all intents and purposes, we don't have access to 93 octane. Somewhere along the way I got it into my head that the Predator would give me the option of an 89 oct Perf tune and a 91, both with and without CAI. I got my unit and it appears I must have been sucking too many exhaust fumes as all I have is a 91 or a 93...

Was I really just imagining an 89 tune, did I mis-order something, or did I fail to read some instructions somewhere?

2009 Charger R/T, no Race and Track package, no other mods (yet).

Thanks

HW

[Mike_Levy]

There is no 89 tune. They require 89 stock, so theres no performance gain in an 89 octane tune.

[gdragich]

The U7136 for the V6 has 89,91,93. The U7135 for the 5.7+6.1 Hemi has 91 and 93 with or wo CAI tunes. Maybe just mixing up which is which.

[09SuperBee]

Yeah you don't want to run anything less than 91 in your Hemi... it should say that right next to the gas cap.

[Mike_Levy]

Yeah you don't want to run anything less than 91 in your Hemi... it should say that right next to the gas cap.

Thats only on the SRTs. We have higher compression that requires 91 or better. A stock 5.7 is designed to be run on 89. When tuned though, the timing is advanced, which is why it needs 91 or 93.