Hwy driving
#1
Hwy driving
Anyone like me hate driving on the hwy with your vette I find on my 74 4 spd if you are going 70 80 miles an hour the rpms are just so high for a v8 and car is Loud cause of the high rpms and mufflers that its just uncomfortable plus gas mileage is down the drain with those rpms so high
#3
Instructor
Member Since: Mar 2012
Location: MISSISSAUGA ONTARIO
Posts: 177
Received 0 Likes
on
0 Posts
Girlfriend hates it,I love it loud no talking mine is automatic but still screams pretty good on the highway.I used to have a 75 close ratio 4spd with a 3.70 rear end true duels and headers....now that was loud on the highway
#5
11.8 MPG HWY isnt too good either...
Miles
#8
Racer
Member Since: Apr 2007
Location: Minot North Dakota :(
Posts: 379
Received 0 Likes
on
0 Posts
I just got my 81 last week. It has a few small mods, but i wasn't feeling all comfortable about being over 3k on the highway. i also calculated gas mileage for the first time yesterday, and when i saw an average of 12.. i wasn't pleased because i figured something was wrong. After seeing this thread.. i guess things are pretty much normal, ha! I havent been at that high of rpm since i had my 5 speed cobra with 4:10's at 80mph.
I guess after getting out of my z that gets 26 on the highway, it was just a shock. Is there anything in particular that could slightly boost mileage on my L81? Its got headers and cat-less exhaust.
-Dave
I guess after getting out of my z that gets 26 on the highway, it was just a shock. Is there anything in particular that could slightly boost mileage on my L81? Its got headers and cat-less exhaust.
-Dave
#9
Team Owner
Member Since: Jun 2000
Location: Southbound
Posts: 38,928
Likes: 0
Received 1,468 Likes
on
1,247 Posts
Cruise-In II Veteran
#10
I just got my 81 last week. It has a few small mods, but i wasn't feeling all comfortable about being over 3k on the highway. i also calculated gas mileage for the first time yesterday, and when i saw an average of 12.. i wasn't pleased because i figured something was wrong. After seeing this thread.. i guess things are pretty much normal, ha! I havent been at that high of rpm since i had my 5 speed cobra with 4:10's at 80mph.
I guess after getting out of my z that gets 26 on the highway, it was just a shock. Is there anything in particular that could slightly boost mileage on my L81? Its got headers and cat-less exhaust.
-Dave
I guess after getting out of my z that gets 26 on the highway, it was just a shock. Is there anything in particular that could slightly boost mileage on my L81? Its got headers and cat-less exhaust.
-Dave
Miles
#11
Racer
Member Since: Apr 2007
Location: Minot North Dakota :(
Posts: 379
Received 0 Likes
on
0 Posts
#12
Racer
Member Since: Jan 2013
Location: Mountains of Maine
Posts: 322
Likes: 0
Received 0 Likes
on
0 Posts
Picked up my first Vette (automatic tranny) a couple of weeks ago, and got to drive it on the highway for maybe 30 miles. It was an adjustment seeing the RPM's up where they were. I am really accustomed to everything having an over drive and multiple gears which allow the engine to lope along at highway speeds. I loved driving it and although mine will rarely see the Interstate, if I ever change the tranny I will look into swapping a 200R4 or maybe 700R4.......
#13
Team Owner
Member Since: Jun 2000
Location: Southbound
Posts: 38,928
Likes: 0
Received 1,468 Likes
on
1,247 Posts
Cruise-In II Veteran
#14
Le Mans Master
Anyone like me hate driving on the hwy with your vette I find on my 74 4 spd if you are going 70 80 miles an hour the rpms are just so high for a v8 and car is Loud cause of the high rpms and mufflers that its just uncomfortable plus gas mileage is down the drain with those rpms so high
Probably closer to 30.
The reason I say that is your entire life has been mainly in cars with overdrive transmissions and are used to the extremely low revving engines of OD transmissions.
Remember, until 1975, highways were typically 65, 70, 75, and even 80 mph depending on the location. Some areas had NO speed limit (reasonable & proper).
You aren't hurting it.
#15
Le Mans Master
I love driving on the freeway or highway with my 74' 4 spd. Keep it at 65 to 70 and just immerse myself in the experience, since I didn't have a stereo installed yet. With the headers, it's sort of loud, but that's just my L-48 talking to me and telling me how happy it is to get out!
PS: a complete JBL system is getting installed soon! 550 watts RMS!
PS: a complete JBL system is getting installed soon! 550 watts RMS!
#16
Race Director
Anyone like me hate driving on the hwy with your vette I find on my 74 4 spd if you are going 70 80 miles an hour the rpms are just so high for a v8 and car is Loud cause of the high rpms and mufflers that its just uncomfortable plus gas mileage is down the drain with those rpms so high
Actually I love it, but then I might be a bit of a masochist. At a steady 3,000-3,300 RPM, the 62 really does make a sweet sound though.
I just got my 81 last week. It has a few small mods, but i wasn't feeling all comfortable about being over 3k on the highway. i also calculated gas mileage for the first time yesterday, and when i saw an average of 12.. i wasn't pleased because i figured something was wrong. After seeing this thread.. i guess things are pretty much normal, ha! I havent been at that high of rpm since i had my 5 speed cobra with 4:10's at 80mph.
The EPA combined mileage for the 81 Corvette was 14 for the 4 speed and 15 for the auto. The highway rating was 22 for the 4 speed and 21 for the auto. In normal driving, I use to get around 14-15 with my 81 automatic, and though it's been a long time since I took it for an extended run down a highway, I'm pretty sure it use to get me between 19 and 20 at a 70 MPH cruise.
I can see where 12 MPG could be possible under really hard driving, or in stop and go traffic, but it seems a little low for normal driving conditions. If that 12 MPG was on the highway, I'd have to say that something is way out of whack!
#17
Burning Brakes
Member Since: Mar 2010
Location: Surrey British Columbia
Posts: 987
Likes: 0
Received 6 Likes
on
6 Posts
I just got my 81 last week. It has a few small mods, but i wasn't feeling all comfortable about being over 3k on the highway. i also calculated gas mileage for the first time yesterday, and when i saw an average of 12.. i wasn't pleased because i figured something was wrong. After seeing this thread.. i guess things are pretty much normal, ha! I havent been at that high of rpm since i had my 5 speed cobra with 4:10's at 80mph.
I guess after getting out of my z that gets 26 on the highway, it was just a shock. Is there anything in particular that could slightly boost mileage on my L81? Its got headers and cat-less exhaust.
-Dave
I guess after getting out of my z that gets 26 on the highway, it was just a shock. Is there anything in particular that could slightly boost mileage on my L81? Its got headers and cat-less exhaust.
-Dave
#18
Racer
For comparison sake, the 72 I just acquired got 15mpg on the drive home (250 miles) at an average of 65 to 70mph...and it's definitely not tuned in properly, as it can't stay running for the first 5 to 10 minutes unless you're giving it a little gas, and when you stop it smells pretty fumey. I did not do any flooring it or anything, I was afraid I would kill it and not be able to get it started again.
#19
#20
My '81 L81 with 4-speed manual transmission is at about 22-2300rpm at 60-65mph...my gas mileage in town is 13-15 and on the highway has been as much as 17-18...car is stock...good luck!....