Octane Requirements
Thread Starter
Burning Brakes
Joined: Oct 2006
Posts: 1,089
Likes: 43
From: Native Californian CALIFORNIA
Army
Octane Requirements
It is my understanding that starting 1971 engine compression levels were reduced to accept less octane to perform.
Question 1969 327ci can it run prpoerly on unlead 92?
Question 1969 427ci can it run propoerly on unlead 92?
Question 1971 327ci can it run properly on unlead 92?
Thanks
Question 1969 327ci can it run prpoerly on unlead 92?
Question 1969 427ci can it run propoerly on unlead 92?
Question 1971 327ci can it run properly on unlead 92?
Thanks
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Originally Posted by SoCalErv
It is my understanding that starting 1971 engine compression levels were reduced to accept less octane to perform.
Question 1969 327ci can it run prpoerly on unlead 92?
Question 1969 427ci can it run propoerly on unlead 92?
Question 1971 327ci can it run properly on unlead 92?
Thanks
Question 1969 327ci can it run prpoerly on unlead 92?
Question 1969 427ci can it run propoerly on unlead 92?
Question 1971 327ci can it run properly on unlead 92?
Thanks
Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Originally Posted by jyounane
Mike Ward's post should read....
No such thing
Yes
No such thing
No such thing
Yes
No such thing
Hmmm.....
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Le Mans Master
Joined: Mar 2004
Posts: 7,493
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From: Little Rock AR
Originally Posted by Mike Ward
Yes, you're right! The last year for 327's was '68 and not '69.
69 Camaro had a 327 as the base V8 for the first few months of production untill they were discontinued - switched over to the 307's.
-Mark.
Pro
Joined: May 2002
Posts: 518
Likes: 17
Hardened valve seats didn't appear until 70 - 71 did they?
That means that for normal street driving the unhardened valve seats will have a mostly respectable life, but if driven hard for extended periods they'll fail pretty quick.
Doug
That means that for normal street driving the unhardened valve seats will have a mostly respectable life, but if driven hard for extended periods they'll fail pretty quick.
Doug
Originally Posted by SoCalErv
It is my understanding that starting 1971 engine compression levels were reduced to accept less octane to perform.
Question 1969 327ci can it run properly on unlead 92?
Question 1969 427ci can it run properly on unlead 92?
Question 1971 327ci can it run properly on unlead 92?
Thanks
Question 1969 327ci can it run properly on unlead 92?
Question 1969 427ci can it run properly on unlead 92?
Question 1971 327ci can it run properly on unlead 92?
Thanks
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Originally Posted by doug_dayson
Hardened valve seats didn't appear until 70 - 71 did they?
That means that for normal street driving the unhardened valve seats will have a mostly respectable life, but if driven hard for extended periods they'll fail pretty quick.
Doug
That means that for normal street driving the unhardened valve seats will have a mostly respectable life, but if driven hard for extended periods they'll fail pretty quick.
Doug
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Originally Posted by doug_dayson
Hardened valve seats didn't appear until 70 - 71 did they?
That means that for normal street driving the unhardened valve seats will have a mostly respectable life, but if driven hard for extended periods they'll fail pretty quick.
Doug
That means that for normal street driving the unhardened valve seats will have a mostly respectable life, but if driven hard for extended periods they'll fail pretty quick.
Doug
More internet legends.................
