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My 97 v6 3.8 Cruises at 70 MPH 1500 RPM.
This seems low compared to my Honda 4cyl. which at same speed stays at 2500 RPM or a little lower. What are your readings? :cool:
 

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it's all about gearing and powerband. the honda high a much higher redline.
 

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Seems a little low. I would say 1800-1900 is about the norm at 70 mph. That's what I usually run with my 94 4.6 LX. My buddy runs around 1900 with his 93 3.8 XR7 (stock everything).
 

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for me, 70 mph = 2100 rpm (3.55 rear gears and 215/70R15 tires)
 

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5000 rpm at 71.7 mph (on my bike, with a 13750 redline). :D

I believe the Thunderbird is in the 2000 - 2200 rpm range at 70 mph (CA car, has the 3.27?? gearing). I could be wrong though... I never really pay it any mind.
 

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snap2 said:
Did a retest tonight and got 1999 at 70mph.
Are you sure it wasn't 2000rpms? haha. 1999 is a pretty accurate reading.
 

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Smaller engines don't produce much torque so they need to run at higher rpms to be able to get the hp's. Hondas are geared acordingly. The final drive of a typical Honda is 4.11 or above.

3.27 gears and an AOD.
My tach says 1550 rpm, but my calc says 1950 rpm. I wonder which is right.
 
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