kahhak

I've done some searching, but haven't found anyone asking a similar question. I'm assuming, therefore, that this is a stupid question, but here goes... I would like to get the GM stage 2 upgrade, but since it recommends the use of 93 octane, which is widely not available in most places, I was wondering if it would be worthwhile to get a custom tune to run the upgrade on 91 octane. Would this make the gains pointless?

sujomatt

iTrader: (3)

What mods do u have now?

kahhak

So far just an intake and a catback that has been sitting on my living room floor.

Bluelightning

iTrader: (8)

You will be fine. The canned tune is very safe anyways. I would go with ZZP's stage 2 IMO.

bluebalt07

iTrader: (8)

^this. ZZP ftw

kahhak

Thank you all so far for your help. I've been doing some more reading and it seems to me that essentially what a tune would do to make 91 octane safe is adjust timing to reduce compression (and therefore power), which would make a smaller pulley and other stage 2 gadgetry pointless. It almost seems like tuning for what I have currently would give me more power for my money. Thoughts?

K-Train04RL

iTrader: (1)

No cause u need more fuel. Get a zzp kit and they can adjut for 91.

mrbelvedere

iTrader: (3)

reducing timing dosent reduce compression compression is mechanicaly fixed thru comp height of the pistons and combustion chamber size your car will run just fine on 91 and a gm stg2 kit next time post tuning questions in the tuning section