[84Reasons]

So have had the 3 stage inlet manifold installed for a while now. Got the evolve tune a couple months back to produce 330 power. Thought everything was okay, power felt.better and I decided to book a rolling road session.

Finally got a rolling road session done on the weekend and it came up as 214hp, basically showing I'm producing stock power as if without a map?

Had it back to the tuners (evolve) and they have said the map is all in place no issues. Car is running absolutely fine and again no issues, passed MOT , service recently , no warning lights

Literally have no idea why it has gained no power at all. Any ideas people?

[neilvan]

rwd or awd? Average rwd drivetrain loss is 15% and awd is 20% (manual transmission). Automatic will be more.

N53 330i makes 268hp. so manual rwd will be ~227whp and manual x-drive should be 214whp. Lower those for auto.

Plus the 330i will have a larger/free-er flowing exhaust from the resonator back so if you havent changed that i'd expect less. Have you also tested both Disas to make sure they are working and operating quickly?

[84Reasons]

Originally Posted by neilvan

rwd or awd? Average rwd drivetrain loss is 15% and awd is 20% (manual transmission). Automatic will be more.

N53 330i makes 268hp. so manual rwd will be ~227whp and manual x-drive should be 214whp. Lower those for auto.

Plus the 330i will have a larger/free-er flowing exhaust from the resonator back so if you havent changed that i'd expect less. Have you also tested both Disas to make sure they are working and operating quickly?

It's RWD. I'm pretty sure the 214bhp is at the engine not wheel horsepower.
I have exhaust changed at the end but only the silencer at the end.
I haven't tested the DISAs not sure how to. Can you let me know?

[neilvan]

You might want to check the dyno sheet. Usually they are read in WHP which makes a lot more sense. Sometimes they do have corrected numbers but that would be the first thing id check.

The exhaust diameter is still smaller (2.75 vs 2.5") so you may not get full 330i hp.

ISTA has Disa activations. If you have a K+D can cable and the software then you can

[84Reasons]

Originally Posted by neilvan

You might want to check the dyno sheet. Usually they are read in WHP which makes a lot more sense. Sometimes they do have corrected numbers but that would be the first thing id check.

The exhaust diameter is still smaller (2.75 vs 2.5") so you may not get full 330i hp.

ISTA has Disa activations. If you have a K+D can cable and the software then you can

Cable isn't hard to buy but how much is the software?

It isn't clear from the sheet if it's whp or bhp. Attached it. I have also asked the company.

[neilvan]

By seeing that; 98% that is 214whp. By the picture your car is auto, Id add 3-5% more drivetrain loss to the numbers I posted earlier. Is your tune just a stock N53 330i tune or an aftermarket (upgrade) tune?

Cable is cheap, software can be found online for free. Just takes a bit of work

[bsmoov]

Disa activations are done on INPA. INPA is free and any decent cable should should work with INPA.

All you do is go to engine, click on your dme, I believe it's like component triggering or something, then disa. You can activate the big and small on command.

I think your 214hp is 214whp which is not too far off from being correct. Especially if your car is running good and you stated you can feel the difference from prior to the manifold and tune.

[84Reasons]

Originally Posted by neilvan

By seeing that; 98% that is 214whp. By the picture your car is auto, Id add 3-5% more drivetrain loss to the numbers I posted earlier. Is your tune just a stock N53 330i tune or an aftermarket (upgrade) tune?

Cable is cheap, software can be found online for free. Just takes a bit of work

It would make sense if it was WHP however the Dyno guy seemed surprised as if he was expecting 272 as well, surely he wouldn't expect 272 from WHP - he is familiar with the cars!

It's an aftermarket tune from a company called evolve. And okay maybe I will look into it if he does say it's power at the engine! Cheers for the all the help.

[84Reasons]

Originally Posted by bsmoov

Disa activations are done on INPA. INPA is free and any decent cable should should work with INPA.

All you do is go to engine, click on your dme, I believe it's like component triggering or something, then disa. You can activate the big and small on command.

I think your 214hp is 214whp which is not too far off from being correct. Especially if your car is running good and you stated you can feel the difference from prior to the manifold and tune.

Okay I will get a cable , does the laptop need to be windows? Only have a Chromebook haha.

Yeah that's true - however these cars stock produce 218hp stock so very close to that as well .... I did feel a difference but it's made me doubt myself and potentially think it was a placebo or something

[bsmoov]

Just because the car produces 218hp stock doesn't mean it equates to 218whp.

In reality your 218hp is more like 175whp.

[nsjames]

it's a chassis dyno, how does it read flywheel horsepower without removing the engine from the car?
if they're telling you that's flywheel numbers then you have to realize that those are complete and utter bullshit, as they are just guesses trying to take into account drivetrain losses.

your photo doesn't show RPM, but I'll assume those bumps in the torque curve correspond with DISA activation, so it probably is working properly.

what you should have done was have a baseline done before you modified the car, and then gone back on a similar weather day after you changed things and have it done again so you can compare the too.

dynos are not anything more than a tool to compare before and afters on the same car. Comparing dyno sheets from one car to the other and from different days/weather/dynos is useless.

[84Reasons]

Originally Posted by bsmoov

Just because the car produces 218hp stock doesn't mean it equates to 218whp.

In reality your 218hp is more like 175whp.

Yes I didn't mean that stock is 218whp I meant stock is 218 BHP meaning that it could be considered that the readings were bhp

[84Reasons]

Originally Posted by nsjames

it's a chassis dyno, how does it read flywheel horsepower without removing the engine from the car?
if they're telling you that's flywheel numbers then you have to realize that those are complete and utter bullshit, as they are just guesses trying to take into account drivetrain losses.

your photo doesn't show RPM, but I'll assume those bumps in the torque curve correspond with DISA activation, so it probably is working properly.

what you should have done was have a baseline done before you modified the car, and then gone back on a similar weather day after you changed things and have it done again so you can compare the too.

dynos are not anything more than a tool to compare before and afters on the same car. Comparing dyno sheets from one car to the other and from different days/weather/dynos is useless.

That makes sense but last Dyno had estimated it at the engine so I just assumed that's my bad maybe.

I have attached the original Dyno I got a year ago, ignore the after readings the map was removed this is a new map I have I've only attached this to show the before.

[84Reasons]

Originally Posted by 84Reasons

That makes sense but last Dyno had estimated it at the engine so I just assumed that's my bad maybe.

I have attached the original Dyno I got a year ago, ignore the after readings the map was removed this is a new map I have I've only attached this to show the before.Attachment 2484277

So basically if we are using this I've gone from 180whp to 214whp

[neilvan]

Originally Posted by 84Reasons

So basically if we are using this I've gone from 180whp to 214whp

If you are 218hp stock. Then for auto/rwd is use roughly 17 % drivetrain loss. 218hp = 180whp. Now being at 214whp and the same drivetrain loss that is ~ 258hp.

Around 10hp down from the estimated 268hp. dynos arn't an exact science but I'd check your disas and see. Lack of 330i exhaust might only be 2-3hp difference at max

[84Reasons]

Originally Posted by neilvan

If you are 218hp stock. Then for auto/rwd is use roughly 17 % drivetrain loss. 218hp = 180whp. Now being at 214whp and the same drivetrain loss that is ~ 258hp.

Around 10hp down from the estimated 268hp. dynos arn't an exact science but I'd check your disas and see. Lack of 330i exhaust might only be 2-3hp difference at max

Okay will check the DISA valves. Could it be just age causing more lost horses? It's a 2007 e93

[neilvan]

Originally Posted by 84Reasons

Okay will check the DISA valves. Could it be just age causing more lost horses? It's a 2007 e93

Age, mileage, maintenance all of that will have some effect for sure. Its also a dyno so different days/air temps all of that. Its used for rough measurements. Exact whp to hp is isnt possible

[84Reasons]

Originally Posted by neilvan

Age, mileage, maintenance all of that will have some effect for sure. Its also a dyno so different days/air temps all of that. Its used for rough measurements. Exact whp to hp is isnt possible

Ages is 13 milage is only 42k. Could there be enough evidence that 10hp is lost purely based on these factors?

[neilvan]

there's tons of factors for drivetrain loss. How clean are your filters, sensors, how fresh are your fluids, bearing condition, grippier tires, spark plug and coils etc.

Then there is the fact that bmw has their facilities and a dyno is just a measure of what the car makes at that time at the wheels.

You can check disas and make sure your car is up to date on maintenance/fluids; beyond that Id say your car is doing what it should.

[84Reasons]

Originally Posted by neilvan

there's tons of factors for drivetrain loss. How clean are your filters, sensors, how fresh are your fluids, bearing condition, grippier tires, spark plug and coils etc.

Then there is the fact that bmw has their facilities and a dyno is just a measure of what the car makes at that time at the wheels.

You can check disas and make sure your car is up to date on maintenance/fluids; beyond that Id say your car is doing what it should.

Okay mate I appreciate the help, thank you

[bsmoov]

there could be 84 reasons that 10hp is lost. Pun intended.

[84Reasons]

Originally Posted by neilvan

there's tons of factors for drivetrain loss. How clean are your filters, sensors, how fresh are your fluids, bearing condition, grippier tires, spark plug and coils etc.

Then there is the fact that bmw has their facilities and a dyno is just a measure of what the car makes at that time at the wheels.

You can check disas and make sure your car is up to date on maintenance/fluids; beyond that Id say your car is doing what it should.

That narrows it down!!

Originally Posted by bsmoov

there could be 84 reasons that 10hp is lost. Pun intended.