Hello 

I have Škoda Octavia 2007 RS DPF TDI 170HP.

 

Till now is done:

- DPF filter and EGR (computer and physically removed) 

- Chip tuning 

Result: aprox. (mapping)

             - 205HP

             - 400Nm 

 

Next step I have changed intercooler from A3/S3, ALU inlet manifold and air filter from Ramair JSK-120.  

And now i took it to dynamometer(Company:Mustang) . But results were disappointing. (Torque is great aprox. 400Nm, and low 168PS) But i felt difference after chip tuning...

Car wasn t measured with original map(170PS).

 

Any ideas.

 

Best Regards Dejan

2 hours ago, crni said:

And now i took it to dynamometer(Company:Mustang) . But results were disappointing.

What's disappointing is that Mustang don't appear to have given you any explanation as to why the engine might be plateauing at ~3_100 rpm. All I can think from what you've said and posted is that your injectors are hitting 100% duty cycle and physically can't deliver more fuel.

 

It would tend to support this hypothesis (not diagnosis, insufficient data for that) if the rate the engine revs built at slowed down as you reached those revs.

Hello

 

We went to another tuning specialist. He measured  car again on dyno. First and second measuring with tuning map 179,43Hp and 179,82Hp. Then measuring with original map 170Hp. But computer showed only 161.71Hp. So they say that something is wrong with car in original condition. Now light for engine turns on and stays on. They will have car for next week and try to eliminate one thing after another to figure what is wrong. They cleaned sensor on air filter then took it off but car goes in safe mode. We will see what next week brings. If you have any suggestions/ideas please let me know.

 

Best regards, 

Dejan 

14 hours ago, crni said:

They will have car for next week and try to eliminate one thing after another to figure what is wrong.

That's just silly. There should be fault codes if the light is on, and reading those takes maybe an hour.

 

The problem was luftmesser - maf sensor. Now i have to go back on dyno for measuring. (HP, Nm)

 

 

 

 

 

 

 

 

The problem was luftmesser - maf sensor. Now i have to go back on dyno for measuring. (HP, Nm)

On 31/10/2021 at 11:34, KenONeill said:

That's just silly. There should be fault codes if the light is on, and reading those takes maybe an hour.

The problem was luftmesser - maf sensor. Now i have to go back on dyno for measuring. (HP, Nm)

 

I bought new Luftemesser. It is better but still not 200Hp. Now we have to search for new reasons.... Any new ideas what to check.

- siemens nozzle adjustment

- check vacuum tube on tandem pump

- check last pot that did not collapse inside...

 

Thanks

 

2 hours ago, crni said:

It is better but still not 200Hp. Now we have to search for new reasons.... Any new ideas what to check.

The dyno and weather. You could take a power map on the Jabbasport dyno in the morning, drive ~100miles to Emerald Systems, take another map and have gained or lost power (IIRC you'd lose power). The only factor to have changed noticeably is the dyno used.

I am from Slovenia. And as i wrote in past posts what was changed.

SBS tuning which tuned my car say that something is wrong with car in original state. Because this car should show 205 PS  and 410 Nm on dyno. I can fell better performance but they say also that it should go even better.

And now i look for cheaper cost to fix this. Torque cca. 400Nm and only 168 PS. Changed MAF senzor and then got 185 PS and now we are ...

Someone sad that my siemens are hitting top of working... They were fabric changed at 120.000km. Now i have 237.000km.

 

Thanks 

On 30/10/2021 at 21:08, crni said:

Hello

 

We went to another tuning specialist. He measured  car again on dyno. First and second measuring with tuning map 179,43Hp and 179,82Hp. Then measuring with original map 170Hp. But computer showed only 161.71Hp. So they say that something is wrong with car in original condition. Now light for engine turns on and stays on. They will have car for next week and try to eliminate one thing after another to figure what is wrong. They cleaned sensor on air filter then took it off but car goes in safe mode. We will see what next week brings. If you have any suggestions/ideas please let me know.

 

Best regards, 

Dejan 

On a 15yo engine losing 6.6 horsepower overall horsepower doesnt seem unusual it could be a combination of wear, gearbox oil, dirty injectors, turbo wear, carbon build up. If theres some dips unexpected dips in the power graph that would be where proper could guess the issue.

 

PS car is rated as 125kw a metric measurement as stated on fuel filler flap not horspower convert it to find your horsepower rating.

Hi. Might be worth dropping the guys at Darkside Developments an email. They seem to get some crazy power figures out of Diesels

 

https://www.darksidedevelopments.co.uk/

On 30/01/2022 at 23:35, craycrayfrog said:

PS car is rated as 125kw a metric measurement as stated on fuel filler flap not horspower convert it to find your horsepower rating.

 

746 Watts is 1 horsepower so 125kW divided by 0.746 is 167.56 horsepower or 169.9 PS [PS is the metric horsepower used by car manufacturers.] 

 

So 125kw on the fuel filler flap is the same as the 170 PS they quote in sales literature.

Need to stick to one set of units and not be confused by PS. It's horses for courses

1 hour ago, pikpilot said:

125kW is 169.9PS

 

125kW is 170.0PS correct to 4 significant figures.

 

Edited 3 February, 20224 yr by Carlston

7 hours ago, pikpilot said:

Need to stick to one set of units and not be confused by PS. It's horses for courses

europe is metric if you want imperial to be correct you have to convert yourself rather than figures intended for magazine reading.                             

UK is metric too. Horsepower is an old unit and I only quoted it as you used in the 1st line of the first post.

Metric unit of power is the kW.  Even my gas bill is now priced in kWh. 

PS is a non standard unit left over from the past. It is a German translation of horsepower (pferdestarke)  but 1.4% bigger than a horsepower.

 

I am pleased to see that VAG car handbooks quote engine power in kW, although they also show HP or PS as the general public only recognise traditional units for car engine power.

Edited 3 February, 20224 yr by pikpilot

On 31/01/2022 at 00:35, craycrayfrog said:

On a 15yo engine losing 6.6 horsepower overall horsepower doesnt seem unusual it could be a combination of wear, gearbox oil, dirty injectors, turbo wear, carbon build up. If theres some dips unexpected dips in the power graph that would be where proper could guess the issue.

 

PS car is rated as 125kw a metric measurement as stated on fuel filler flap not horspower convert it to find your horsepower rating.

Yes that could be normal. But on chiped / maped motor, it should show around 200 HP. That unusual.