Depends on the gas too... the EMC guys have trouble with high 8's to 9.0 DCR on 91 Shell pump gas.

Bret

 

The gas down here is nothing special. It's not oxygenated either.
When ya are in a CONTEST to extract the last bit of HP&Torque I can see 91 being a problem.
What they should do is let um build them like they want and put a KR on every engine. Then when it rattles it pulls timing and by by HP.

 

LR: What's a KR?
-b

 

I imagine he is talking about "knock retard".....and knock sensors.

 

Some places it's much worse than others.... it's the mix of the RON and MON that makes the diff, and each state has their own standards.

Bret

 

how's the standard's here in texas? anyone know?
-b

 

let's just say, i've probably got more experience than 95% of the people here. when most kids were running around terrorizing the neighborhood, i was in the garage. been wrenching 16 of my 25 years, so i think i've got a pretty decent idea whats going on.

 

With over 55,300 people registered, 5% is about 2765 folks.

 

Any monkey can turn a wrench for 16 years....not flaming you...just once you start contributing with informative and helpless posts who here knows of you...don't be so quick to bang on your chest and call yourself the Lord of the Jungle.

 

I am running 8.7 on the dot. My pistons rattle tons, but actuall knock? nope haven't seen any.

Listen to mindgame, upwards of 9.0 shouldn't be too big of a problem. Good tune and good gas.