Phil99vette

iTrader: (11)

What octane gas are you guys running at the track and what is your compression ratio? I am running 11.75 in a 346 H & C motor, what gas should I use?
Phillip

Coach 02 A3 Z/28

iTrader: (10)

I have 11.1 compression and I run sunoco 104 unleaded racing fuel. <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" />

What kind of octane should you run? It depends on your compression ratio and timing. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Good luck to ya. <img border="0" alt="[angel]" title="" src="graemlins/gr_angel.gif" />

<small>[ November 22, 2002, 07:54 AM: Message edited by: Coach 02 M6 Z/28 ]</small>

Pro Stock John

iTrader: (34)

Also depends on your timing...

I am supposed to be around 12:1, with 26 degrees of timing and I run 100/93 mix.

Big Mike

iTrader: (4)

12.5:1

Sunoco GT Unleaded Plus 104 here.

<small>[ November 21, 2002, 07:26 PM: Message edited by: Big Mike ]</small>

Colonel

Once I was 11.5:1 and ran VP CSP (96.6 motor octane.)

Then I was 12.2:1 and ran VP Motorsport 103 (99 motor octane.)

Now I'm 16:1 and I'll be running VP C14+ (115 motor octane.)

<small>[ November 22, 2002, 11:59 AM: Message edited by: Colonel ]</small>

Phil99vette

iTrader: (11)

How much difference do your cars run on the street and 93 octane pump gas? How much do you change the timing for 93 octane gas?
Phillip

Phil99vette

iTrader: (11)

Can you run leaded and unleaded gas mixed? Will this kill the O2 sensors? On my last car I ran at least 100 passes with mixed gas and the O2s were fine.
Phillip

Colonel

When I was running on the street I didn't change the timing that much. I richened the mixture up from .850mv to .920 or so. Yes, that lowered the timing a little. Maybe from 31 degrees down to 28 or so.

SILVER BULLET

iTrader: (1)

In order to run leaded can I simply remove the cats and O2's or is their more to it than that?

What are the positives and negatives of running leaded fuel.