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Old August 15th 06, 10:09 PM posted to rec.autos.makers.jeep+willys
Mike Romain
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Posts: 3,758
Default Jeep 4.0L with Rubicon tires (30.6") and 4.56 ok?

If I wind my CJ7's 258 up to 3000 rpm in 4th gear, I am doing about 80
mph. At 65 mph I turn 2300 rpm in 4th and 1700 in 5th. I prefer the
2300 rpm and get a lot better mileage there than lugging along at 1700
rpm.

But I have on 33's turned by 3.31 gears.... ;-)

The red line on mine is only 4500 rpm, but at least it will pull to 4400
now, then it hits the wall. Stock with the emissions computer in the
loop, it seemed to be governed to 3500 or so.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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Jeff Strickland wrote:
>
> How often to you get to go 60? I only hit sixty on my way to 70+, then I hit
> it again on my way back down.
>
> As a point of comparison, I have a '95 Bronco with a 5.8L (351 ci) motor,
> and I'm turning closer to 1500 at 60.
>
> My Jeep with the 258 won't even go much faster than 3500 rpm, and that seems
> like a strain. I gotta think that you'll be hating life at 2650 rpm doing
> 60, and you'll hate 3000 rpm doing 70 even more.
>
> "kion" > wrote in message
> oups.com...
> >
> > Jeff Strickland ha escrito:
> >
> >> 4.56s with 30" tires will be pretty low. The engine will be runing very
> >> fast
> >> at freeway speeds.

> >
> > According to my calculations going at
> > 60 MPH i will be at 2650 RPM
> > That does not sound unliveable But I really do not want to take a wrong
> > desicion.
> >

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