11:1 compression and 92 octane?
Thread Starter
Safety Car
Joined: Aug 2000
Posts: 4,537
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From: St. Joseph MO
Cruise-In III Veteran
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11:1 compression and 92 octane?
Thanks to western Missouri's wonderful fuel ratings, 92 octane is the highest pump gas I can get. Now if I'm running the Patriot Stage 2 LQ9 (ls6 style) heads, am I going to see any problems with 92 octane? Or should I just tune it and drive the hell out of it?
Thanks.
Thanks.
Burning Brakes
Joined: Feb 2002
Posts: 1,154
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From: Jasper GA
Re: 11:1 compression and 92 octane? (JoeyG)
A number of other variables influence detonation (weather, cam timing, etc.), but I'm running 11.1:1 without audible detonation on 93 octane. One little ole octane number shouldn't make much of a difference.
Premium Supporting Vendor
Joined: Oct 2003
Posts: 281
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From: Georgetown Texas
Re: 11:1 compression and 92 octane? (JoeyG)
As mentioned, there are a few factors that will influence detonation, but tuning will be a big factor. I ran 11.1:1 compression ratio with my heads/cam setup and 92 octane pump gas with no problems. When the heat of the summer rolls around, I will normally pull a few more degrees of timing out.
Let us know if you have any questions on the Patriot stage II LS6 cylinder heads. We've been selling them like crazy! :crazy:
Trevor
Texas Speed & Performance
806-866-0734
[Modified by Trevor @ Texas Speed, 3:24 PM 10/16/2003]
Let us know if you have any questions on the Patriot stage II LS6 cylinder heads. We've been selling them like crazy! :crazy:
Trevor
Texas Speed & Performance
806-866-0734
[Modified by Trevor @ Texas Speed, 3:24 PM 10/16/2003]
Tech Contributor
Joined: Mar 2003
Posts: 12,094
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From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Re: 11:1 compression and 92 octane? (JoeyG)
What cam are you running as LSA is one of the biggest variables. If you have a big cam with a 112 or lower LSA you could probably get away with big 11's with no issue. I run 11.6:1 on 93 with no issues and i know of some tuners having seen over 12:1 on 93. The compression ration is related to 2 variables, static and dynamic compression. One more thing, the ls1/6 pcm's adjust automatically for hot weather tuning.
Instructor
Joined: Aug 2003
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From: Albertville AL
Re: 11:1 compression and 92 octane? (JoeyG)
I'm running the patriot LS6 style heads with the 59cc chambers and I haven't had any trouble at all running 93 in it. I've autotapped the car and it isn't getting any KR.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
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From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Re: 11:1 compression and 92 octane? (JoeyG)
MTI C2 224/224 .581/.581 112
Yeah, I know baby cam :steering:
Yeah, I know baby cam :steering:
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Drifting
Joined: May 2002
Posts: 1,607
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From: San Francisco CA
Re: 11:1 compression and 92 octane? (JoeyG)
MTI C2 224/224 .581/.581 112
Yeah, I know baby cam :steering:
Yeah, I know baby cam :steering:
Thread Starter
Safety Car
Joined: Aug 2000
Posts: 4,537
Likes: 84
From: St. Joseph MO
Cruise-In III Veteran
Cruise-In IV Veteran
Re: 11:1 compression and 92 octane? (SFVetteman)
MTI C2 224/224 .581/.581 112
Yeah, I know baby cam :steering: If yours is a baby cam then my cam must be premature :D Here in California there are many C5's running around with a similar 224 cam and 11:1 compression on 91 octane with no problem.
Yeah, I know baby cam :steering: If yours is a baby cam then my cam must be premature :D Here in California there are many C5's running around with a similar 224 cam and 11:1 compression on 91 octane with no problem.
