Is 165 mph possible ?
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Burning Brakes
Joined: Oct 2004
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From: Pearland Texas
Is 165 mph possible ?
My 1990 Coupe with a L98 is strictly stock. Its only got about 35K miles and it's been well taken care of. Before I got it I was told by my bro in law he reached 165 on a Kansas flat highway, does any body know what my actual top speed should be ? Is he full of B.S. ? I've never pushed it over 115.
Pro
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From: Fuquay Varina North Carolina
Originally Posted by Dads90
My 1990 Coupe with a L98 is strictly stock. Its only got about 35K miles and it's been well taken care of. Before I got it I was told by my bro in law he reached 165 on a Kansas flat highway, does any body know what my actual top speed should be ? Is he full of B.S. ? I've never pushed it over 115.
Thread Starter
Burning Brakes
Joined: Oct 2004
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From: Pearland Texas
Is 165 mph possible ?
My 1990 Coupe with a L98 is strictly stock. Its only got about 35K miles and it's been well taken care of. Before I got it I was told by my bro in law he reached 165 on a Kansas flat highway, does any body know what my actual top speed should be ? Is he full of B.S. ? I've never pushed it over 115.
Safety Car
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From: Poop land
When my intake was stock, my top speed was 155 mph. When I put the SuperRam on + my custom pcmforless.com chip tune, the fastest I have taken it was 167 mph. That is with 3.07 gears and my motor was turning 4700 rpms. I've got to find the video on my computer. It was on putfile for awhile. When I find the link, I'll post it here.
Burning Brakes
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From: Millbury MA
Originally Posted by kopbet89c4
When my intake was stock, my top speed was 155 mph. When I put the SuperRam on + my custom pcmforless.com chip tune, the fastest I have taken it was 167 mph. That is with 3.07 gears and my motor was turning 4700 rpms. I've got to find the video on my computer. It was on putfile for awhile. When I find the link, I'll post it here.
on the stock figure. I was going to say 155 at the most.
Waka, Waka, Waka!
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From: Richmond Virginia
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St. Jude Contributor
Originally Posted by Dads90
...
Is he full of B.S. ?
...
Is he full of B.S. ?
...
HOWEVER, Since a 15 year old speedometer could possible be 10% high: If he made it to 150, the speedo would be reading 165.
So no, he might not be full of BS, but I wouldn't bet any money that your stock C4 can really hit 165
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a 90 L98 automatic can top out at around 155 stock.6spds a few mph more.maybe with a few mods one can hit 165
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Originally Posted by Dads90
My 1990 Coupe with a L98 is strictly stock. Its only got about 35K miles and it's been well taken care of. Before I got it I was told by my bro in law he reached 165 on a Kansas flat highway, does any body know what my actual top speed should be ? Is he full of B.S. ? I've never pushed it over 115.
my answer is it doesnt have enough power to push the car to 165.
when mine was stock it did around 154MPH, and after exhaust it did around 157MPH. my grandma was driving.
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From: SE NY
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Assuming your '90 is bone stock with an A4, 2.59 gears and relatively new stock tires you would have to spin that L98 to 5,900rpm in 3rd gear to hit 165mph.
If he had the shifter in 3rd and held the accelerator down long enough it's possible that it would pull that high but it would be a long time going from 140mph to 165mph.
If he had the shifter in 3rd and held the accelerator down long enough it's possible that it would pull that high but it would be a long time going from 140mph to 165mph.
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From: Poop land
The stock intake is truly a restrictive one. I noticed power loss after about 4000 rpms. Once a SuperRam is installed, it felt like the motor was breathing better up top with no noticeable loss of torque on the bottom. Took it to 160 mph many times. Further porting and polishing the inside of the plenum and runners, larger TB and a chip tune yielded a 167 mph top speed, hopefully with no hills involved! It was videotaped and the last thing I said on it was, "Man we are f***ing flying!!
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From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
Originally Posted by kopbet89c4
The stock intake is truly a restrictive one. I noticed power loss after about 4000 rpms. Once a SuperRam is installed, it felt like the motor was breathing better up top with no noticeable loss of torque on the bottom. Took it to 160 mph many times. Further porting and polishing the inside of the plenum and runners, larger TB and a chip tune yielded a 167 mph top speed, hopefully with no hills involved! It was videotaped and the last thing I said on it was, "Man we are f***ing flying!!
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Originally Posted by 65Z01
Assuming your '90 is bone stock with an A4, 2.59 gears and relatively new stock tires you would have to spin that L98 to 5,900rpm in 3rd gear to hit 165mph.
If he had the shifter in 3rd and held the accelerator down long enough it's possible that it would pull that high but it would be a long time going from 140mph to 165mph.
If he had the shifter in 3rd and held the accelerator down long enough it's possible that it would pull that high but it would be a long time going from 140mph to 165mph.
but it wont spin to 5,900 rpm being bone stock.
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From: Poop land
Originally Posted by kwik_silver
You are a braver man than I Charlie Brown
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From: I was a young troubadour when I rode in on a song, and I'll be an old troubadour when I'm gone.
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I've done more high speed runs down flat Kansas highways that I care to admit. :bb
165 is definitely possible.
I do have a 383 SuperRam, not a stock intake by any means.
165 is definitely possible.
I do have a 383 SuperRam, not a stock intake by any means.
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From: Bergen County, NJ
Originally Posted by cuisinartvette
I'm willing to bet that most of the stock wornout L98's here might go 140 on a good day, mine included. Wish there was somewhere around I could find out 
I think they are good till 140-145, with the right road conditions.
