I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

mollwollfumble said:

I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

Yes.

Peak Warming Man said:

mollwollfumble said:

I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

Yes.

In fact there are laws against giving false or misleading information in any commercial transaction.

mollwollfumble said:

I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

Car is supposed to have a compression ratio of 11:1 which is a compression of 160 rather than 135 to 140. Could that be part of the problem? Or is that normal.

mollwollfumble said:

mollwollfumble said:

I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

Car is supposed to have a compression ratio of 11:1 which is a compression of 160 rather than 135 to 140. Could that be part of the problem? Or is that normal.

Most definitely.

mollwollfumble said:

I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

It may well be, but your car is probably quite normal as the engine power from the manual is from the engine, from a dyno it’s from the wheels and it’s quite normal for a good 25% of the power to disappear between the engine and the road.

mollwollfumble said:

Car is supposed to have a compression ratio of 11:1 which is a compression of 160 rather than 135 to 140. Could that be part of the problem? Or is that normal.

Nope, there’s not a great deal of correlation with CR & cranking psi.
For example the engine in my racing car (a Suzuki G13 1.3 litre engine) has about 10.5:1 compression and because of some of the tricks I know I get at least 230 psi when tested.

Michael V said:

mollwollfumble said:

mollwollfumble said:

I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

Car is supposed to have a compression ratio of 11:1 which is a compression of 160 rather than 135 to 140. Could that be part of the problem? Or is that normal.

Most definitely.

That’s about 9.2:1 compression ratio, indicating considerable leak-down.

Michael V said:

Michael V said:

mollwollfumble said:

Car is supposed to have a compression ratio of 11:1 which is a compression of 160 rather than 135 to 140. Could that be part of the problem? Or is that normal.

Most definitely.

That’s about 9.2:1 compression ratio, indicating considerable leak-down.

Sounds like it needs an Italian tune-up.

Spiny Norman said:

Michael V said:

Michael V said:

Most definitely.

That’s about 9.2:1 compression ratio, indicating considerable leak-down.

Sounds like it needs an Italian tune-up.

Hell yes.

:)

mollwollfumble said:

I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

did they take it up to the max RPM same as for test in specificififications

Spiny Norman said:

mollwollfumble said:

I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

It may well be, but your car is probably quite normal as the engine power from the manual is from the engine, from a dyno it’s from the wheels and it’s quite normal for a good 25% of the power to disappear between the engine and the road.

25%.

Ta, that’s the number I was looking for.

A lot more than I expected.

mollwollfumble said:

Spiny Norman said:

mollwollfumble said:

I finally got around to having my car engine Dyno tuned.
1.6 litres, 4 cylinder, petrol.
Compression 135 135 140 135

Before tuning
Power 56.7, Torque 98.3
After tuning
Power 66.8, Torque 114.8

So far so good, but my car has felt underpowered from when I bought it new.
And original specs in the user manual say (all measurements in metric)
Power 93, Torque 160

The car hasn’t lost much power since I bought it.

So is there a law against giving totally wrong performance figures when you sell a new car?

It may well be, but your car is probably quite normal as the engine power from the manual is from the engine, from a dyno it’s from the wheels and it’s quite normal for a good 25% of the power to disappear between the engine and the road.

25%.

Ta, that’s the number I was looking for.

A lot more than I expected.

It’s just one of the many inefficient systems that regular cars have compared to EV’s.

Does anyone else have a problem with the labeling of the thread as non science?

sarahs mum said:

Does anyone else have a problem with the labeling of the thread as non science?

I don’t think it is necessary on this forum to denote threads as non-sci. Any new thread should just be on a topic of interest.

consider all that’s wasted in heating (i’ll ignore the engine itself for a moment) your clutch , transmission, and differential, makes walking seem efficient

some goes to wearing the rubber off your tyres too

what a waste

transition said:

consider all that’s wasted in heating (i’ll ignore the engine itself for a moment) your clutch , transmission, and differential, makes walking seem efficient

some goes to wearing the rubber off your tyres too

what a waste

bring on the fifteen minute city, ya could walks derrr crosseyes

get rid of your fridge and pantry storage space etc completely even, no need to go shopping not-very-often, you could go every day on foot, short walks helps ya spend more often, even twice a day if you want, spend all day there spending