General RPM at 60mph

[multipete]

Hi,bought a 07 Grande Punto dynamic 1.2,8v. When driving at 60 mph,revs are at 3000,70mph is at 3500 rpm,is this normal in 5th,tyre size is 175/65/15. Sounds like it is over reving,but might just be me.

 

[Ben D]

Sounds about right to me.

 

[gandhimate]

Hi,

I have a 1.2 2006 Active and your rpm's are identical to mine, from what I've read, this seems perfectly normal.

Thanks

 

[multipete]

Thanks,got a 2b active sport and that revs about 2750 at 60mph, so this just seams abit high,but if it's normal,it's not an issue.Cheers.

 

[Bernievarian]

Generaly speaking a small engine needs to run faster than a larger one to produce the same output: it breathes less air / turn so is able to burn less fuel =>less power.
The 1.2 is rather small so your figure seems correct...

BRs, Bernie

 

[dtimmins1985]

Get some new headers, free flowing exhaust and a nice shiney inlet with better plenumb chamber... will burn more air / fuel, more power - less rpms (if done right and mapped correctly, if the system isnt a self learner / adjuster)

 

[Bernievarian]

Exactly, that's called engine tuning ;-) ...

The various sensors should detect this extra air amount and the ECU would adapt the fuel quantity accordingly, resulting in a little gain in power.
All other things (gear and differential ratio and tyres) kept as original, the car will feel more responsive.

BRs, Bernie

 

[aurick86]

Get some new headers, free flowing exhaust and a nice shiney inlet with better plenumb chamber... will burn more air / fuel, more power - less rpms (if done right and mapped correctly, if the system isnt a self learner / adjuster)

That is not how gearboxes work at least the non-CVT ones.
Even auto gearboxes have a stall speed where the engine speed is locked to the wheel speed through the torque converter.

The rpm'a are fine. it's a petrol engine.. and the 5th gear is usually about the same ratio for all normal small passenger cars.

 

[Bernievarian]

Hi Aurick,

I think he meant more power, @ less revs...

Of course you're right, revs would NOT decrease if other things are kept unchanged !

BRs, Bernie