M135i Stock - Dyno run @ KAR

[Crash_Nemesis]

Howzit Crash, your stock E46 m3 made 224 wheel kw?? :-O

I'm not so sure she was 100% stock at the time. And I know the previous owner loved Octane Booster.

I have the graph here somewhere, he sent it to me before I bought the car to show engine power etc before and after his mods. I know the car actually lost kw after the engine build due to new chrome moly rings taking a long time to bed in correctly but she made a little more torque.

Shall seek out the graph and show thee.

 

[K33G4N]

Howzit Crash, your stock E46 m3 made 224 wheel kw?? :-O

I'm not so sure she was 100% stock at the time. And I know the previous owner loved Octane Booster.

I have the graph here somewhere, he sent it to me before I bought the car to show engine power etc before and after his mods. I know the car actually lost kw after the engine build due to new chrome moly rings taking a long time to bed in correctly but she made a little more torque.

Shall seek out the graph and show thee.

Kewl, Not doubting your numbers bro, just really impressed. Never seen a e46 m push more than 200 on the wheels stock. Not sure how much effect the octane booster would have. I dont really use it.

Thanks

 

[Crash_Nemesis]

Howzit Crash, your stock E46 m3 made 224 wheel kw?? :-O

I'm not so sure she was 100% stock at the time. And I know the previous owner loved Octane Booster.

I have the graph here somewhere, he sent it to me before I bought the car to show engine power etc before and after his mods. I know the car actually lost kw after the engine build due to new chrome moly rings taking a long time to bed in correctly but she made a little more torque.

Shall seek out the graph and show thee.

Kewl, Not doubting your numbers bro, just really impressed. Never seen a e46 m push more than 200 on the wheels stock. Not sure how much effect the octane booster would have. I dont really use it.

Thanks

K33gen. The dyno was in Cape Town. All e46 M3's in Cape Town push more than 200wkw. I apologize if I did not make that clear in the beginning. This was at the coast.

In JHB, it's more like 185wkw stock. And 190 - 195wkw with mods.

The e46 M3 makes great power at the coast. They are robbed of nearly 40kw up here in Jhb.

Here is a Dyno graph of MattQ's e46 M3. This was dyno'd in Cape Town. On the left of the graph you see it says Engine Power Corrected. This means it is flywheel Kw and not wheel kw.



246.3 flywheel kw is +- 210 wheel kw.

If an e46 M3 does not make more that 200wkw at the coast, that car is very sick.

 

[K33G4N]

cool, thanks for the info.

Thats Very strong at the coast. Also very Suprised as I once ran against a e46 m3 at the coast. Not sure what mods he had. But I was atleast 1.5 to 2 cars ahead of him. I had a Stock 135i at the time, My wheel power was 183kw when the car was sick and after sorting it out is was 197wkw.

 

[Crash_Nemesis]

Wow. Interesting indeed. I may very agree that you are a better driver than that e46 m3 driver. You may have simply out driven the poor man. Ha ha.

If you think the M3 driver really was doing his best, I believe it could also be Vanos seals or Vanos issues.

My car lost 40nm torque on the wheels due to a small oil leak on the Vanos which wouldn't allow the inlet cam to advance. That mean's acceleration was down. Any race will result in me playing catch up.

Another three members on this forum with e46 M3's Dyno'd with 160wkw on their e46 M3's up here in JHB. All related to Vanos issues. A1exander has since fixed one and brought his power back up to +-180wkw.

Unfortunately, these e46's are getting old, 14 years this year since the first models were released. I would race a few more and get an average to see how they stack up. But a stock M3 that hasn't had Vanos serviced is going to be down on power, I'll bet my bottom dollar.

A healthy stock e46 M3 will be over 200wkw at the coast. Hope this helps man.

 

[K33G4N]

Thanks.

Yeah small problems equal big power loss sometimes. I had faulty boost solenoids and boost pipe leaks when I purchased the car. But after sorted out the car was a beast. Sold it last year though .


Still craving a E46 M. Always prefer naturally aspirated power. Just very difficult to find a clean one at a reasonable Price.

 

[Crash_Nemesis]

Yeah man. If you need help when going to buy one, PM me and I can give you a checklist to make sure the one you getting is in good nick. A good sign though, is low mileage and that the car received its inspection II at BMW. Valve shims need to be adjusted frequently. If ignored, the tappet gets very noisy.

Vanos seals become hard and brittle and don't hold the required 90psi pressure required to activate the Vanos.

Anyway, enough hijacking of this thread. PM when you go check out a car and I'll do my best to advise you on getting a clean one.

Awesome. :thumbs:

 

[K33G4N]

Thanks will do

 

[Mteez]

Morning all im new to this forum. I need some advice and from wat ive read so far u guys have experience. I have a 135i n55 wen i bought the car i had them install the bmw exhaust and bmw software i really wana decat dp my car but im worried about the engine light coming on. Any advice guys thanks


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[Crash_Nemesis]

Mteez, I have Decat on my car. Being an e46, I cannot tell you for certain how it works on the N55 135i platform, but there are two ways of getting rid of the engine light.

1. Software that cancels the code.

2. Cat foolers are installed in your exhaust to fool the ECU.

Both methods work on the e46 M3. I would imagine these methods will still work on other models. I would suggest talking to Ralf on the forum here or some of the 135i members who have done serious exhaust mods.

 

[Quick///M]

Morning all im new to this forum. I need some advice and from wat ive read so far u guys have experience. I have a 135i n55 wen i bought the car i had them install the bmw exhaust and bmw software i really wana decat dp my car but im worried about the engine light coming on. Any advice guys thanks


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Please introduce your self in the new member section. There after post a separate topic on your question.

Guys will gladly help you out once we have a proper introduction

 

[Oldman]

To Answer wheel kilowatt to Crank 16 % drivetrain loss and 5 % loss for a turbo motor so 21% for a Naturally aspirated motor 14 % for joburg altitude so 30% correction is applied.


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[K33G4N]

To Answer wheel kilowatt to Crank 16 % drivetrain loss and 5 % loss for a turbo motor so 21% for a Naturally aspirated motor 14 % for joburg altitude so 30% correction is applied.


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A comma would help lol.
So youre saying 21% loss for turbo at altitude and
30% loss for NA Cars at altitude


If this is true am I correct in saying a na cars in jhb that have a dyno graph with ambient correction of 30% are actually displaying flywheel power since its reading the wheel kw then adjusting for altitude and drivetrain losses to get flywheel power?

Every Dyno that I did was always 0 ambient correction. Just curious how this all works. IMO it would be better to dyno ur car whether na or turbo and have 0% ambient correction no matter what altitude. Then atleast you know its not corrected figures....

 

[Crash_Nemesis]

No. OLDMAN has got it wrong. No idea where he got his 21% drivetrain loss for an NA engine, lol. but just to correct his mistake.

The 30% ambient correction is used because of barometric readings and altitude and temperature. It's a combination of all them. It does not factor drive train loss. THe readings are all wheel kilowatts unless is says ENGINE Power/ ambient Corrected.

Altitude loss for NA car here is 18%. Each 100meters above ground is 1% loss. JHB is about 1750m above sea leve. so call it 17.5%

KAR has been using 30% for a long time. I don't think they actually change it. A proper Dyno would adjust their ambient correction depending on weather. I guess it's easier for them to just keep it at 30% as a benchmark.

Dyno's at the coast use 0% ambient correction as they are at sea level. Sometimes they use -2% or +2% depending on temp.

 

[Oldman]

All engines are measured on a bench i.e no drivetrain loss of 16 %, the 5 % is what a turbo loses at altitude and the other 16% is for altitude. In reality that is how you arrive at true engine power. Just take your engine out next time and put it on a bench run Dyno. 17 % correction is the max most dynos run..


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[Crash_Nemesis]

AH.. I see what you mean now. Your previous statement had no commas and was not easy to follow. Yes, your theory is correct if the car was dyno'd for wheel kw/hp in JHB. You would then add the 15-16% drivetrain loss and add the 17-18% altitude loss to your figure to get engine power at the coast.

So, 182wkw at altitude would be 257kw on the engine at the coast.

And I agree about the 17% correction that most dyno's should run. I've always had an issue with Kar's 30% figure.

Anyway, use this calculator to help get figures

http://khetan.gajjar.co.za/cars/calcs/PowerConversionCalculator.htm