david.clement@verizon.net wrote:
: Aaron,
: You have to remember the speedo's up near the top of the scale have huge errors
: and they are optomistic so you were not going any where near the indicated
: speeds. Plus, just to go from 115 to 130 with your 2.5 would require almost
: doubling the horsepower.
Yep, for us "non professionals", using a GPS is probably the best/cheapest
way of getting an accurate speed reading.
: I am assuming it's a typo when you said 5.13's in the Fury. Assuming a 26-to
: 28" tall tire that is going to put the rpm in the 7500 to 8100 rpm range. No
: 318 2bl will spin those kinds of rpm.
Maybe not - it strikes me that if the gears were swapped to 5.13s and
the speedometer gear in the transmission wasn't corrected, the speedometer
would read high. If the car were originally equipped with 3.55s and 5.13s
were swapped in, 118mph indicated would be closer to 80mph. If it originally
came with 3.91s, then 118mph indicated would be about 90mph. For 4.10s,
just under 95mph. I don't recall where that 318 would tach out, but assuming
6,000rpm with 5.13s and a 28" tire, the speed would be 97mph.
So... This may be completely wrong, but my guess is something
along the lines of 5.13 gears were installed and maybe the 4.10
speedometer gear was the max correction the person who did it could
find, which would mean that 118mph indicated was more like 95mph,
assuming the 318 2bbl could get to 6,000rpm in third gear?
--
-Jon-
.-- Jon Steiger --- jon@dakota-truck.net or jon@jonsteiger.com --.
| '70 Barracuda, '90 Dakota Convertible, '92 Ram 4x4, '96 Dakota |
| '96 Intruder, '96 Kolb FireFly, '99 Cherokee, '01 Ram 3500 |
`----------------------------------- http://www.jonsteiger.com --'
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