93 octane in Denver? - F-Body Road Racing and Autocross Forums

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trackbird View Member Profile	Dec 13 2005, 06:16 PM Post #2
FRRAX Owner/Admin Group: Admin Posts: 15,432 Joined: 13-February 04 From: Ohio Member No.: 196	Thinner air reduces the filling of the cylinders, therefore if the cylinder only contains 50% of the air molecules that it would see at sea level (for example, it's not truly that low) and you compress it 10:1, it's only a true 5:1. So, the altitude lowers cylinder pressure and reduces detonation problems. In a nutshell......

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35th_Anniversary_AS_Camaro_SS 93 octane in Denver? Dec 13 2005, 04:07 AM

Rob Hood I didn't think they had that high of octane at... Dec 13 2005, 06:00 AM

Sam Strano Lat time I was there 91 was it because of the alti... Dec 13 2005, 06:02 PM

trackbird Thinner air reduces the filling of the cylinders, ... Dec 13 2005, 06:16 PM

35th_Anniversary_AS_Camaro_SS Yeah, but with a "mass" airflow sensor d... Dec 13 2005, 10:59 PM

trackbird QUOTE (35th_Anniversary_AS_Camaro_SS @ Dec 13... Dec 13 2005, 11:22 PM

35th_Anniversary_AS_Camaro_SS the lower compression ratio is really a misnomer. ... Dec 14 2005, 01:42 AM

trackbird Right. We are actually discussing dynamic compress... Dec 14 2005, 03:22 AM

00 SS I've never gone through all the thermochemistr... Dec 14 2005, 04:26 PM

trackbird QUOTE (00 SS @ Dec 14 2005, 11:26)Maybe you g... Dec 14 2005, 05:41 PM

00 SS Interesting. I thought the vapor pressure determi... Dec 14 2005, 06:11 PM

trackbird QUOTE (00 SS @ Dec 14 2005, 13:11)Interesting... Dec 14 2005, 06:54 PM

00 SS QUOTE (Rob Hood @ Dec 13 2005, 00:00)I didn... Dec 14 2005, 08:29 PM

trackbird QUOTE (00 SS @ Dec 14 2005, 15:29)The bottom ... Dec 14 2005, 08:59 PM

35th_Anniversary_AS_Camaro_SS I'll run whatever Danny Popp says is okay.... ... Dec 14 2005, 10:31 PM

00 SS QUOTE (35th_Anniversary_AS_Camaro_SS @ Dec 14... Dec 14 2005, 10:39 PM

Spectator I thought higher octane fuel actually had slightly... Dec 14 2005, 11:09 PM

pknowles QUOTE How often you you ever get knocking in moder... Dec 14 2005, 11:13 PM

pknowles QUOTE I thought higher octane fuel actually had sl... Dec 14 2005, 11:17 PM

Spectator I understand that. I'm talking about the actua... Dec 14 2005, 11:23 PM

35th_Anniversary_AS_Camaro_SS QUOTE (00 SS @ Dec 14 2005, 16:39)Correct, bu... Dec 14 2005, 11:39 PM

CMC#5 hehe so then why is the max octane in Ca 91 not 93... Dec 16 2005, 04:57 AM

trackbird QUOTE (CMC#5 @ Dec 15 2005, 23:57)hehe so the... Dec 16 2005, 05:31 AM

35th_Anniversary_AS_Camaro_SS I was thinking it could be something about emissio... Dec 16 2005, 06:09 AM

trackbird QUOTE (35th_Anniversary_AS_Camaro_SS @ Dec 16... Dec 16 2005, 01:21 PM

CMC#5 So you think the CARB (Cal Air Resource Board) is ... Dec 16 2005, 10:10 PM

trackbird QUOTE (CMC#5 @ Dec 16 2005, 17:10)So you thin... Dec 16 2005, 11:12 PM

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35th_Anniversary... 35th_Anniversary_AS_Camaro_SS View Member Profile	Dec 13 2005, 04:07 AM Post #1
Chapter 11 Racing Group: Advanced Members Posts: 1,166 Joined: 15-February 04 From: Houston, Republic of Texas Member No.: 207	seems like stupid question, but Topeka sure as heck didn't have any 93.