[vtl]

I am pleased to announce that we are partnering up with Jin Zhou @ Eastern BM to host a dyno day together! This is an awesome opportunity to get some affordable dyno time, and catch up with enthusiasts.

Location: Eastern BM Bayswater 1/11 Michellan Ct, Bayswater VIC 3153
Time: 31st of August, 2019 - 9am to 3pm

Format: 20 cars (with 5 reserves for backup), 3 runs each, $80 per car

Your spot will be confirmed only after payment and all the required information is received.

First come first serve basis, once we reach 20 cars, we will use the reserves to fill any people who pull out. Please come at least 15-20 minutes before your allocated timeslot. Additionally please make sure your car is warmed up, as the runs are done immediately after its strapped on

Please read the entry information carefully, and please check the current list of taken spots first

Contact me and provide me with the following:
- Your name
- Desired time slot preferences (give at least 3 in case your preference is already taken)
- Rego plate
- Car make/model/year
- Transmission type (Auto/DCT/Manual)

Payment method will be bank transfer, please put your rego plate plus first name for transaction description e.g. "John AFQ 133". There will be lots of other transactions to sort through so make sure you follow this!

Number | Time | Name | Car
01 | 09:00 - Cecilia Anastasia, 2015 BMW F20 M135i Auto
02 | 09:15 - Phil Rybinski, 2007 BMW E92 335i Manual
03 | 09:30 - Vincent Lim, 2008 BMW E82 135i Manual
04 | 09:45 - Peter Youssef, 2007 BMW E92 335i Manual
05 | 10:00 - Anthony Venuto, 2008 BMW E82 135i Manual
06 | 10:15 - Peter Agas, 2012 BMW E82 135i Manual
07 | 10:30 - Zaid Ali, 2012 Mk6 Golf R DSG
08 | 10:45 - Bobby Mircevski, 2008 BMW E90 335i Auto
09 | 11:00 - Dominic Papalia, 2013 BMW F13 M6 DCT
10 | 11:15 - Joe Zhou, 2009 BMW E82 135i Manual
11 | 11:30 - Tian Ou-Young 2010 BMW E92 335i DCT
12 | 11:45 - Edmund Lee 2011 BMW E82 135i DCT
00 | 12:00 - Lunch
13 | 13:00 - Bill Lee, 2008 BMW E92 M3 Manual
14 | 13:15 - Sidney Loke, 2012 BMW E92 M3 DCT
15 | 13:30 - Calvin Chau, 2009 BMW E82 135i Auto
16 | 13:45 - Jan del Rosario 2008 BMW E82 135i Auto
17 | 14:00 - Sukhpreet Singh, 2018 BMW F20 M140i Auto
18 | 14:15 - John Porsovigan, 2008 BMW E82 135i Manual
19 | 14:30 - Dominic Papalia, 2009 E89 BMW Z4 35i DCT
20 | 14:45 - Richard Hope, 2008 BMW E92 335i Manual

Reserve 1 - Ian S 2016 BMW F87 M2 DCT
Reserve 2 - Ian S 2016 BMW E93 M3 DCT
Reserve 3 - Ricky Zanazanian, 2009 BMW E82 135i
Reserve 4
Reserve 5

[vtl]

10 spots taken! 10 to go...

[Socket]

Looking forward to this 👍👍

[naenae]

ill come to watch in my pandem e92

[vtl]

3 spots left...

[vtl]

1 spot left!

[Hoper]

Originally Posted by vtl

1 spot left!

I'm in as long as I'm not too late

will be good to meet a few of the Vic crowd

[vtl]

All spots gone! Any more people will be added to the reserve list

[Hoper]

Originally Posted by Hoper

I'm in as long as I'm not too late

will be good to meet a few of the Vic crowd

So I'm not going to share details yet as it's a bit raw, but I've made a big mistake while working on the car this weekend and my engine is making a noise that would indicate it's broken, metal on metal sounds are never a good sign

I'm guessing bent rod (well that was Tim's suggestion) bent valve or some bearing noise

posting here because I won't make the dyno day, so there's now a spare spot

[Brule]

Opportunity to chuck an s55 in it.

[Hoper]

Originally Posted by Brule

Opportunity to chuck an s55 in it.

LOL thanks Brule, money tree is broken as well though :

Tried to contact you when I was in Darwin about 3 weeks back, did you change your mobile number?

[Brule]

Nah same number.

Money trees are always broken with these cars.

[Socket]

This tomorrow 👍

[Brule]

30 pounds rippin socket

[Socket]

Originally Posted by Brule

30 pounds rippin socket

I’ll be happy if I beat my last run of 308 but that said Jins dyno is said to be a heart breaker

[Brule]

Hope you all have fun.

[Pete.J]

The data has arrived!! Dyno's are a tuning tool, so it's all about data and comparing with your previous runs on the same dyno, or pre and post getting tuned, or comparing to other cars with similar output from factory / similar tune, running same fuel, or just setting a baseline for yourself to compare with in the future... etc.

Some data is missing from the table, I am not going to chase people to complete the table, so I filled up everything I know, and put a red "?" for the unknowns. Members are welcome to pm me info for their cars, and I'll fill in the missing data.

Plenty of people has expressed that this particular dyno reads low, I don't think it really matters, as long as all cars are showing consistent figures to one another.

I do think that this dyno reads a little lower than I expected, giving the drivetrain losses that BMW quotes in their tech docus, BMW says the drivetrain efficiency is 89% for a manual E9x platform, that means there should be only 11% drivetrain losses. But we've all seen slightly higher drivetrain losses than what can be calculated theoretically (specially on the E92 M3's).

The only car that put down numbers today, that match the standard drivetrain losses calculations is the Cayman GT4. It's quoted by Porsche to make 283kW at the flywheel, and it made 246rwkW, which accounts for 14% loss. On the other hand, the two tuned E92 M3's made 238 and 244rwkW, and from factory they're quoted at 309kW, that accounts for 22% drivetrain loss, and supposedly those two E92 M3's are also tuned. Bone stock M3's make even less than the 238rwkW that those cars made today, which works out to be closer to 30% drivetrain losses.

If I used the Cayman's percentage loss on my car, then my car makes 300kW at the flywheel, if I followed the E92 M3's, then it's closer to 330-340kW which is definitely too high to believe. Quang's stock M2 Competition made 269.4rwkW on the same dyno, on a different day, and they're rated at 302kW at the flywheel, works out to be 11.8% exactly, which is very close to the 11% drivetrain loss percentage BMW quotes. It's safe to say losses are somewhere between 11-15%, and in my opinion, the S65 in the E92 M3 is more of a 280-290kW motor instead of the 309kW BMW quotes, as there's no other explanation to why they were seeing huge drivetrain losses compared to other cars.

Either Way, it doesn't make too much of difference as long as all cars put down consistent numbers to one another on the same dyno in the same conditions.

Screenshot of the data table and some videos of the day:

[BM3Rrrr]

Curious to see two cars running the MHD E30 map with similar mods making 30rwkw difference in power. One being an N54 and the other N55, could that would be the contributing factor?

[Pete.J]

Originally Posted by BM3Rrrr

Curious to see two cars running the MHD E30 map with similar mods making 30rwkw difference in power. One being an N54 and the other N55, could that would be the contributing factor?

That is certainly the contributing factor, N55 cars have a much smaller stock turbo, it can't flow as much air as the N54 twins at the limit. So N55 cars will often fall flat on their face earlier in the rpm range, instead of the graph continuing to climb higher for a little longer to hit 280rwkW like N54 does.

It's all about how much air can you shove through these motors, but the volumetric efficiency is roughly the same for the 3.0L capacity.

Honestly, if I had a N55, I wouldn't be happy at all with the stock turbo size. I'd have certainly upgraded to TTE550 (or Pure Stage 2, but I'd rather avoid Pure, they screwed Socket over when his N54 hybrid turbos failed). TTE is German based, more popular than Pure in Europe, and they're significantly better to deal with overall.

If it's a late N55 car (can't remember the month/year cut off date on top of my head), you'll also need a XDI upgraded HPFP for fueling, the later N55 cars got a crap pump from factory. That'll set you another $2.8k AUD delivered for the pump.

[Socket]

Great day... Big thanks to Jin for hosting and Vince for organising

[Hoper]

Spewing, spent the day pulling bits off the car and putting them back on again in a vein attempt to prove that my engine isn't actually broken

Would've loved to have been there, will def make one of these Melbourne events soon

[BM335M]

Here's my log of the first E30 MHD Stage 2+ pull on the dyno.. for 280.6kw
Bit of timing corrections up top from 5000rpm but very surprised what E85 does to these cars.. With E50 and fuel pump it will go over 300kw atw which is very impressive for this platform on unopened engine, stock turbos and basic bolt-ons.


https://datazap.me/u/mircebob/dyno-p...-9-10-14-15-21