SC- 1st Gen (1992-2000)

RPM at 80mph??

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Old 10-01-14, 12:25 PM
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King700se
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Default RPM at 80mph??

May be a dumb question...but how many rpms should i be running at 80mph?

Trying to pin point a possible issue
Old 10-01-14, 12:32 PM
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turbodremz
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Depends on the car and the gear ratio, also what trans?
Old 10-01-14, 12:34 PM
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King700se
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Originally Posted by turbodremz
Depends on the car and the gear ratio, also what trans?


bone stock 93 sc400 - 103k miles

Resonaters and mufflers off
Old 10-01-14, 12:47 PM
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OG Dada
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My SC400 used to be around 2500-2600 rpm when cruising at 80 mph with the cruise control on.
Old 10-01-14, 01:03 PM
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King700se
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Originally Posted by KingPhilip
My SC400 used to be around 2500-2600 rpm when cruising at 80 mph with the cruise control on.


Im closer to 3k...
Old 10-01-14, 03:03 PM
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mikef
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I think im at 1.5k rpm
Old 10-01-14, 04:05 PM
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3L4jzz31
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In my sc3 5spd at 65 I'm around 2700 so I'm kinda amazed how king philip is around there at 80 in his old 400 o.O, TBH I'd say 3k sounds about right tbh at 80 w/ 3.916:1 gearing
Old 10-01-14, 05:07 PM
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Bankswood
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I'm bone stock 93 SC 400 with 157k and at about 2500rpms. You sure your OD is engaged?
Old 10-01-14, 05:36 PM
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myLEXsc400
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in my mostly stock 96 sc400 im at 2000 at 50mph, so i'm sure at 80 im closer to 3000.
in my 97 5spd sc300 im at 3500 at just under 80mph
Old 10-01-14, 06:12 PM
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OG Dada
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Originally Posted by 3L4jzz31
In my sc3 5spd at 65 I'm around 2700 so I'm kinda amazed how king philip is around there at 80 in his old 400 o.O, TBH I'd say 3k sounds about right tbh at 80 w/ 3.916:1 gearing
Sir I have a 5 speed SC300 now, and I can tell you it's world apart from the SC400.
Old 10-01-14, 09:38 PM
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eknine9
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Originally Posted by KingPhilip
Sir I have a 5 speed SC300 now, and I can tell you it's world apart from the SC400.
Yep, SC300 revs high at highway speeds. It might sound dumb, but I'd love to go r154, NA-T, and LSD just for lower highway RPM's. The extra power would be nice too lol.
Old 10-02-14, 08:32 AM
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King700se
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Originally Posted by Bankswood
I'm bone stock 93 SC 400 with 157k and at about 2500rpms. You sure your OD is engaged?
Positive. It just seems a little high, like it should be shifting into another gear with lower rpms.

The only current sign i'm having at the moment right now, that is directing me to the ECU, is the hard starting issue that this car is known for. It has never not started, but some mornings it acts like the battery is almost dead. But it starts every time.
Old 10-02-14, 07:12 PM
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CatManD3W
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2jzgte with w58....on highway at 3000 rpm is right around 70mph for me with stock rear end
Old 10-03-14, 05:11 AM
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Auto SC400 (99) 3.26 gearing is about 2700-2900. Maybe a bit lower
Old 10-03-14, 03:20 PM
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18 inch rims, 92 SC400 stock at 2600 @ 80 MPH


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