Dynoed My Cts And Detected Less Power

[hedzx]

Hi there, I have made a dyno to my cts 2zzge stock engine and it detected only 177,8 hp

It was a 2wd dyno with the rear wheels stopped, also It was a hot day.

Maybe I have any problem like carbon deposits or lift bolt problem? (i bought it used 2002 cts with 70k km)

Could the 2wd only dyno had affect on the vsc or something?

Should I try it on a 4wd dyno?

I would like to know your opinion, thanks

[Fizz]

Dont mak eany difference whether its a 2wd/4wd dyno to be honest mate.

You said it was a hot day, that and along with the fact its done over 70k would mean its lost some poines over the years as every car does.

[hedzx]

Dont mak eany difference whether its a 2wd/4wd dyno to be honest mate.

You said it was a hot day, that and along with the fact its done over 70k would mean its lost some poines over the years as every car does.

just asking because I had a friend that says one new clio rs (200hp) detected 170 hp on 2wd (ESP confused?), and 200 on 4wd

[petermarston]

was the power measured the power at the engine or the wheels as there is always some power loss through the gearbox.etc

[Fizz]

Dont mak eany difference whether its a 2wd/4wd dyno to be honest mate.

You said it was a hot day, that and along with the fact its done over 70k would mean its lost some poines over the years as every car does.

just asking because I had a friend that says one new clio rs (200hp) detected 170 hp on 2wd (ESP confused?), and 200 on 4wd

The problem with that is that no 2 dyno's read the same... ;)

[hedzx]

was the power measured the power at the engine or the wheels as there is always some power loss through the gearbox.etc

178 is the engine value, wheels were less, when I have the time I will test the car at another dyno.

On the road the top speed I get was something like 238 km/h,but haven't measure the time to get there

[rolley]

was the power measured the power at the engine or the wheels as there is always some power loss through the gearbox.etc

178 is the engine value, wheels were less, when I have the time I will test the car at another dyno.

On the road the top speed I get was something like 238 km/h,but haven't measure the time to get there

I think its the fact that being a hot day the CTS suffers badly. I've noticed mine is like a rocket on cold days but in the summer its not on the ball.

As for mileage its km to 70k km is like 45k miles so thats not a problem.

Plus as everyone says, every dyno is different, so take it somewhere else preferably morning and get it run then. I say morning because its likely to be colder than mid day!

[hedzx]

I've seen some dynos of other t-sport's.

Some detect more than 190 hp and 202 hp with the kn filter...

After another dyno test, if my cts still have less power, what parts could I change to get the 190 performace back again?

exhaust? Fuel Injectors cleaning?

...

new engine?

[dawesy]

putting it on a 4WD dyno will make no difference as you still only have a 2WD car!

hot weather can have a big impact and add to that that not all cars leave the factory with the same power.

the other important factor is the dyno cell itself. it would need to have a good air supply and big fans to even get close to true driving conditions.

something else to think of is tyre pressures. you could 'gain' upto 8bhp on the old golf GTi's by pumping the tyres right up for a RR session!

you are not missing a lot of power so dont worry. also K&N filters if not given a closed off cold air feed will make less power than stock, FACT!

[Fizz]

thanks for that Lee.. ;)

[hedzx]

putting it on a 4WD dyno will make no difference as you still only have a 2WD car!

hot weather can have a big impact and add to that that not all cars leave the factory with the same power.

the other important factor is the dyno cell itself. it would need to have a good air supply and big fans to even get close to true driving conditions.

something else to think of is tyre pressures. you could 'gain' upto 8bhp on the old golf GTi's by pumping the tyres right up for a RR session!

you are not missing a lot of power so dont worry. also K&N filters if not given a closed off cold air feed will make less power than stock, FACT!

No diference on 2WD/4WD even with VSC? because I can't turn it off in this car maybe its the same, I don't know how it works.

Thanks for the information

[dawesy]

if the vsc was affecting power you would hardly run as the rear wheels are locked and the fronts are moving so the VSC system would kill all power as it thinks your way outa control

[banana man]

is there not a good chnace they have incorrectly calculated you final drive ratio, are they not meant to dyno it on the fourth which is closest to direct drive.

Just a thought <_<

[Fizz]

im confused.. what has the final drive ratio got to do with the engine power output?

Also.. Dyno runs are normally done in 3rd or 4th gear depending where you go.

[hedzx]

is there not a good chnace they have incorrectly calculated you final drive ratio, are they not meant to dyno it on the fourth which is closest to direct drive.

Just a thought <_<

This one was done on 5th gear or 4th, but i'm not really sure

[banana man]

I thought they used forth as it has a 1:1 ratio, possibly different on the 6 speeder, so this will be direct drive almost give or take a few rpm but i am sure they have to know the gear ratios, so they can choose the correct gear in which to perform the power run.

just a thought though

[dawesy]

the gearbox acts as a torque multiplier.

most dynos work this out tho on the run down clutch dipped the wheels are allowed to slow down this calculates the transmission losses.

as said most are done in 3rd or fourth

[Jock Fran]

I don't understand why they use 3rd or 4th 'cause the T Sport has nowhere near a 1:1 ratio from engine to wheels. For that it would need to be doing about 800rpm at 60mph!

[Jock Fran]

What was the power measurement at the wheels?

[hedzx]

What was the power measurement at the wheels?

148hp at the wheels, maybe is due to the fact of too much driving in town lately, and needs some more 6000+ rpm driving

[doctor_moose]

I have just bought a 52 T-sport and i was wondering if anyone new what the bhp would be. Also, i dont know much about engines and would like someone to explain exaxtly what the 'lift' is and how it works. Thanks

[UK86_MarK]

Hi mate and wecome!!

Correct me if im wrong guys but the 52 CTS is 187bhp whereas the 04 is 189bhp, the "lift" (again correct me if im wrong) occurs when you hit 6200rpm and the valves lift, you fully understand what the L in VVTLi means, it's as close to a turbocharger as any conventionally aspirated engine is going to get. Basically you get a HUGE power surge, like you've just been kicked in the butt by the jolly green giant :)

and now for the technical anwser :)

VVTL-i = Variable Valve Timing and Lift- intelligent

Toyota's Variable Valve Timing and Lift-intelligent engine goes one step further than VVT-i engines: It automatically adjusts the amount of "lift" on the cylinder's intake and exhaust valves. In fact, VVTL-i technology has a lot in common with the human body: Athletes train to increase the air volume entering and leaving their lungs.

At high engine speeds Toyota's Electronic Control Unit (ECU) "lifts" the four valves located over each cylinder to increase the fresh air entering and exhaust leaving the cylinder. Increased air intake at high engine speeds (above 6200 rpm) means more power, better combustion and fewer harmful emissions.

Cheers

Mark

[doctor_moose]

Well thats about a good an answer as i could of wanted. Thanks for your help

[UK86_MarK]

your welcome mate!!

Enjoy the CTS dude :)

Mark

[T128]

Hi mate and wecome!!

Correct me if im wrong guys but the 52 CTS is 187bhp whereas the 04 is 189bhp, the "lift" (again correct me if im wrong) occurs when you hit 6200rpm and the valves lift, you fully understand what the L in VVTLi means, it's as close to a turbocharger as any conventionally aspirated engine is going to get. Basically you get a HUGE power surge, like you've just been kicked in the butt by the jolly green giant :)

ok you are wrong all cts with 2zz-ge vvtl-i are 189bhp no different if is late 2002 model or the last ever cts roll out of the factory they should all be 189bhp standard.