Lost 20 BHP on a low mileage engine

[Smartbear]

No, my zed has an n20. I said I believed they could add 10 to 12bhp to the n52.
Maybe the op got confused as to what the guy said as in an earlier thread he was insisting that n52’s have shims...
Rob

The N20 is not naturally aspirated though, so it's entirely different

They can certainly crisp up throttle response and remove flat spots, but I don't believe they can add 10bhp to the N52, as previously stated. They can make you believe you have 10 more bhp with fake dyno graphs

I don’t for one second believe they need to fake Dyno graphs, I also know my car isn’t na and mentioned it as proof of a real power hike (with no fake graph)
Evolve have a good reputation and don’t overstate any gains they can get.
I’d be more suspicious of someone that insisted n52’s have shims
Rob

[Ducklakeview]

the technician at Evolve suggested that cars have to be driven hard to maintain their power, and if garaged for long periods can be susceptible to carbon build up.

Ding ding, I call bullshit.

Likewise, an engine that isn't being run CAN'T build up carbon..

FFS, that's a new one on me, and I've heard a lot of so called "good" advice over the years

Mike

[Z4M-2006]

I wouldnt sweat it in the least..

Dyno runs and subsequent graphs can even be altered by how the car is strapped down.....

The internet is awash with tales of cars not meeting their BHP on tuners rolling roads.

[R60BBA]

Here’s a link of the footage:

https://instagram.com/p/BevT5eildRk/

Car was pulled in 4th gear.

[MACK]

I'd be more concerned by the low fuel economy than one rolling road session. However the two together would imply an issue. That said is your fuel economy actually that bad. You say you've only had the car since September. It's obviously cold out there this time of year and if you're only doing short journeys the car will take longer to warm up hurting fuel economy over what the same car might achieve in the summer. Might be worth having it scanned to see if there's any soft codes in it that aren't flagging a warning light. That said plenty of parts can still be partially up the wall without a code actually being created but if they're miss reading power and emissions could be affected.

[R60BBA]

I'd be more concerned by the low fuel economy than one rolling road session. However the two together would imply an issue. That said is your fuel economy actually that bad. You say you've only had the car since September. It's obviously cold out there this time of year and if you're only doing short journeys the car will take longer to warm up hurting fuel economy over what the same car might achieve in the summer. Might be worth having it scanned to see if there's any soft codes in it that aren't flagging a warning light. That said plenty of parts can still be partially up the wall without a code actually being created but if they're miss reading power and emissions could be affected.

Only time will tell in regards to fuel economy and the weather.

Apart from fuel economy, the only ‘thing’ I’ve noticed with this car is that when I lift the clutch to the bite it makes a rattling/chattering sound after I’ve driven it hard. It doesn’t do this when the car is cold, or if it’s warm but hasn’t been ragged.

But the clutch is still strong so I don’t know whether it’s an issue or not.

[MACK]

I'd be more concerned by the low fuel economy than one rolling road session. However the two together would imply an issue. That said is your fuel economy actually that bad. You say you've only had the car since September. It's obviously cold out there this time of year and if you're only doing short journeys the car will take longer to warm up hurting fuel economy over what the same car might achieve in the summer. Might be worth having it scanned to see if there's any soft codes in it that aren't flagging a warning light. That said plenty of parts can still be partially up the wall without a code actually being created but if they're miss reading power and emissions could be affected.

Only time will tell in regards to fuel economy and the weather.

Apart from fuel economy, the only ‘thing’ I’ve noticed with this car is that when I lift the clutch to the bite it makes a rattling/chattering sound after I’ve driven it hard. It doesn’t do this when the car is cold, or if it’s warm but hasn’t been ragged.

But the clutch is still strong so I don’t know whether it’s an issue or not.

Now that sounds like the dual mass flywheel and I wouldn't worry about that too much. Many manual cars suffer this and can carry on for many 10s of thousands of miles without it causing any issues. Usually you can just leave it till the clutch needs replacing. It wont be causing your lack of power etc.

I take it that as you havent mentioned it that the car runs smoothly and revs cleanly etc.

[R60BBA]

I'd be more concerned by the low fuel economy than one rolling road session. However the two together would imply an issue. That said is your fuel economy actually that bad. You say you've only had the car since September. It's obviously cold out there this time of year and if you're only doing short journeys the car will take longer to warm up hurting fuel economy over what the same car might achieve in the summer. Might be worth having it scanned to see if there's any soft codes in it that aren't flagging a warning light. That said plenty of parts can still be partially up the wall without a code actually being created but if they're miss reading power and emissions could be affected.

Only time will tell in regards to fuel economy and the weather.

Apart from fuel economy, the only ‘thing’ I’ve noticed with this car is that when I lift the clutch to the bite it makes a rattling/chattering sound after I’ve driven it hard. It doesn’t do this when the car is cold, or if it’s warm but hasn’t been ragged.

But the clutch is still strong so I don’t know whether it’s an issue or not.

Now that sounds like the dual mass flywheel and I wouldn't worry about that too much. Many manual cars suffer this and can carry on for many 10s of thousands of miles without it causing any issues. Usually you can just leave it till the clutch needs replacing. It wont be causing your lack of power etc.

I take it that as you havent mentioned it that the car runs smoothly and revs cleanly etc.

I too think it’s the flywheel.

Hopefully won’t keep the car long enough to fork out for a new clutch

The car is uber smooth, whether pushed hard or simply cruising. My cousin drives an A45 and says it delivers the power quite a bit smoother than his. I’ll probably take that with a pinch of salt but it’s still testimony to the engine’s overall smoothness.

Last week I managed to beat an E92 M3 off the lights in damp conditions, so I know it is capable (albeit at the next set of lights the driver admitted he couldn’t get full power down due to lack of traction and he was carrying a passenger.)

[MACK]

Only time will tell in regards to fuel economy and the weather.

Apart from fuel economy, the only ‘thing’ I’ve noticed with this car is that when I lift the clutch to the bite it makes a rattling/chattering sound after I’ve driven it hard. It doesn’t do this when the car is cold, or if it’s warm but hasn’t been ragged.

But the clutch is still strong so I don’t know whether it’s an issue or not.

Now that sounds like the dual mass flywheel and I wouldn't worry about that too much. Many manual cars suffer this and can carry on for many 10s of thousands of miles without it causing any issues. Usually you can just leave it till the clutch needs replacing. It wont be causing your lack of power etc.

I take it that as you havent mentioned it that the car runs smoothly and revs cleanly etc.

I too think it’s the flywheel.

Hopefully won’t keep the car long enough to fork out for a new clutch

The car is uber smooth, whether pushed hard or simply cruising. My cousin drives an A45 and says it delivers the power quite a bit smoother than his. I’ll probably take that with a pinch of salt but it’s still testimony to the engine’s overall smoothness.

Last week I managed to beat an E92 M3 off the lights in damp conditions, so I know it is capable (albeit at the next set of lights the driver admitted he couldn’t get full power down due to lack of traction and he was carrying a passenger.)

Now you said that it explains the fuel economy. It's the way your be driving it!
Seriously though if it's running smooth/well to the point someone thinks it's smoother than their 4 pot turbo, you've probably not got too much to worry about.

[markalp]

Now that sounds like the dual mass flywheel and I wouldn't worry about that too much. Many manual cars suffer this and can carry on for many 10s of thousands of miles without it causing any issues. Usually you can just leave it till the clutch needs replacing. It wont be causing your lack of power etc.

I take it that as you havent mentioned it that the car runs smoothly and revs cleanly etc.

I too think it’s the flywheel.

Hopefully won’t keep the car long enough to fork out for a new clutch

The car is uber smooth, whether pushed hard or simply cruising. My cousin drives an A45 and says it delivers the power quite a bit smoother than his. I’ll probably take that with a pinch of salt but it’s still testimony to the engine’s overall smoothness.

Last week I managed to beat an E92 M3 off the lights in damp conditions, so I know it is capable (albeit at the next set of lights the driver admitted he couldn’t get full power down due to lack of traction and he was carrying a passenger.)

Now you said that it explains the fuel economy. It's the way your be driving it!
Seriously though if it's running smooth/well to the point someone thinks it's smoother than their 4 pot turbo, you've probably not got too much to worry about.

I think he is getting excellent fuel economy, i'm ashamed to say what i'm getting *coff* 10-14mpg around town *coff*

However that is because of the way I drive, and, I know and accept it lol

[BMWZ4MC]

Last week I managed to beat an E92 M3 off the lights in damp conditions, so I know it is capable (albeit at the next set of lights the driver admitted he couldn’t get full power down due to lack of traction and he was carrying a passenger.)

He should have put his passenger in the boot

[R60BBA]

Last week I managed to beat an E92 M3 off the lights in damp conditions, so I know it is capable (albeit at the next set of lights the driver admitted he couldn’t get full power down due to lack of traction and he was carrying a passenger.)

He should have put his passenger in the boot

Haha wouldn’t have made a difference. Dragging in the wet is mainly down to the driver’s right foot!

[BMWZ4MC]

Last week I managed to beat an E92 M3 off the lights in damp conditions, so I know it is capable (albeit at the next set of lights the driver admitted he couldn’t get full power down due to lack of traction and he was carrying a passenger.)

He should have put his passenger in the boot

Haha wouldn’t have made a difference. Dragging in the wet is mainly down to the driver’s right foot!

It sounds like he should have put himself in the boot and let someone else drive

[R60BBA]

Does anyone know what sort of times these run at Santa Pod?