Avg highway mph
Nov 26, 2006, 02:22 PM
#16
Originally Posted by hotrod2448
Operating within a very small rpm range could develop an issue where engine generates a certain frequency (harmonic) that actually changes the structure of the metal (I've heard it referred to as crystallizing not sure if that is the proper term) of internal components and cause them to fail.
http://www.tciauto.com/Products/Tech...ler_tech.asp#1
http://www.tciauto.com/Products/Tech...ler_tech.asp#1
Nov 26, 2006, 07:06 PM
#17
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I know we have had issues in some of our race engines at tracks like Fontana and Texas where you are at a sustained high RPM for long periods of time but, we are talking small block chevys rarely going under 7500 RPM and up to almost 10,000RPM for 4 hours straight. Definitely not the type of stuff your typical street car is ever going to see.
Nov 29, 2006, 11:41 PM
#20
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No, stick with 93. Octane does not improve gas mileage.
My Thanksgiving road trip I averaged 26.5 mpg and I drove 75-85 with at least 50 miles of it through mountains. Oh and BTW, I have a 50 trim, 272 cams and 780cc injectors.
My Thanksgiving road trip I averaged 26.5 mpg and I drove 75-85 with at least 50 miles of it through mountains. Oh and BTW, I have a 50 trim, 272 cams and 780cc injectors.
Nov 29, 2006, 11:47 PM
#21
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Originally Posted by Cirrusly Evolvd
No, stick with 93. Octane does not improve gas mileage.
My Thanksgiving road trip I averaged 26.5 mpg and I drove 75-85 with at least 50 miles of it through mountains. Oh and BTW, I have a 50 trim, 272 cams and 780cc injectors.
My Thanksgiving road trip I averaged 26.5 mpg and I drove 75-85 with at least 50 miles of it through mountains. Oh and BTW, I have a 50 trim, 272 cams and 780cc injectors.
Dec 1, 2006, 04:51 PM
#24
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Originally Posted by 3000ways
Um I don't know, but everybody in SoCal drives 80mph and up, I just try and keep pace. I guess that is why Californians go through cars like candy.
I've got this thing with school and playground zones, though. No speeding. Period. Its an absolute with me. I almost saw the death of an elementary school child on roller blades in a marked and active cross walk that I stopped for, but 3 other "drivers" couldn't wait and sped past me almost causing disaster in Dallas, Texas.
Now, not to say that the car just doesn't natually want to do like 80 or 90 or 100MPH because it just feels so right...
Dec 1, 2006, 04:55 PM
#25
i average 80-90 and have never had a problem with any car of owned... i previous car i put about 15k in long trip highway miles going 75-95 the whole trip and traded it with 55k.. the car drove 110% since day 1...
maintnence is whats keeps the car fresh!
maintnence is whats keeps the car fresh!
Dec 2, 2006, 01:12 AM
#28
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Originally Posted by hotrod2448
It's more a consistent RPM for long periods of time that will hurt an engine and that can happen at any speed as long as it's a constant RPM maintained for a long duration. That's part of the reason these cars don't have cruise control. Just vary your speed a little and it should not be an issue at all.
I know we have had issues in some of our race engines at tracks like Fontana and Texas where you are at a sustained high RPM for long periods of time but, we are talking small block chevys rarely going under 7500 RPM and up to almost 10,000RPM for 4 hours straight. Definitely not the type of stuff your typical street car is ever going to see.
I know we have had issues in some of our race engines at tracks like Fontana and Texas where you are at a sustained high RPM for long periods of time but, we are talking small block chevys rarely going under 7500 RPM and up to almost 10,000RPM for 4 hours straight. Definitely not the type of stuff your typical street car is ever going to see.
The stress exerted to maintain a moving motor (consistent highways RPM) would be less than the ones required to accelerate repeatedly (variable RPM).
Last edited by binarysleep; Dec 2, 2006 at 01:14 AM.
