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Is it only my car that accelerates slow until 3000rpm then flies to 5500rpm and then can't reach 6000rpm or just mine. And what's the fastest you've gone in each gear? Mine's stock and I go:
1st:50mph @ 5500rpm
2nd:70mph @ 5500rpm
3rd:[email protected] 5500rpm
4th:[email protected] 4500rpm(never tried to go faster)
 

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> Is it only my car that accelerates slow
> until 3000rpm then flies to 5500rpm and then
> can't reach 6000rpm or just mine. And what's
> the fastest you've gone in each gear? Mine's
> stock and I go:
> 1st:50mph @ 5500rpm
> 2nd:70mph @ 5500rpm
> 3rd:[email protected] 5500rpm
> 4th:[email protected] 4500rpm(never tried to go
> faster)
I had same problem 4 years ago it was alocked up fan clutch . IF it is tight simply take it apart and put some thin oil in it You might run 5 degrees warmer on a hot day but your motor will pull great and will make more power.
 

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> Is it only my car that accelerates slow
> until 3000rpm then flies to 5500rpm and then
> can't reach 6000rpm or just mine.

240's have a definite power band from ~3800 to redline, but they are fairly docile at lower revs. No worse than a the average family station wagon though.

Not reaching 6000rpm is a definite problem. Unloaded, my 240Z motor will spin over 7500rpm (not intentional - my aftermarket carpet jammed the pedal during an upshift). One of my past cars, an Australian 120Y (US = 210), was fitted with an L16 SSS motor from a 1600 (US = 510). The L16 is basically a 4 cylinder L24 (4 x 400cc = 1.6L & 6 x 400cc = 2.4L). These engines share the same bore, stroke, pistons etc, and that car would pull 7500rpm in gear (1st or 2nd) on a worn stock motor! The small stroke L-series motors will rev!

A likely cause of a limited rev range and poor power would be the ignition timing. You may have a seized vacuum or mechanical advance meaning optimal timing is being limited to a small rev range? Check the timing at idle to start with and then investigate further if it's already correct.

Lastly, if your car is modified it may have a really inappropriate camshaft, ignition or head change.
 
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