Put Down 177.3 RWKW+VID. Is This Good??

[holong]

I put down 194.2kw at the wheels with only an intake kit fitted, and I think it was 192kw with the stock airbox on. The intake made little to no difference but sure sounds nicer

Video here : http://www.youtube.com/watch?v=w4k0mtQmNZA

I guess to get a proper comparison you need someone else to run on the same dyno as you? I will scan/photograph the sheet if you would like to compare the curves.

[ParaBul]

How much do they charge for a dyno run? If it's not too much, I'll meet you there so we can do some back-to-back testing.

[slammedM3]

How much do they charge for a dyno run? If it's not too much, I'll meet you there so we can do some back-to-back testing.

you may want to see my other thread.
i went to KPM on Goowood road.
costs 90 dollars

[morerevsm3]

first dyno I had on my (then) stock S50B30 was at KPM, made 171.1 RWKW

[slammedM3]

hey slammedM3.

i have a few progressive dyno pulls on s50b32

as bought 164rwkw (cant find sheet)
new plugs, oil change, reflash, heat shileded pod intake 180rwkw.
x pipe replace the factory merge 188rwkw
straight through rear exhaust (loud) 194rwkw.


havent upgraded stuff power wise for a while, but i have recently put in a UUC RSC36 exhaust (see sig link) and my gearbox is out and a light weight flywheel #2will go in, and i have some schrick284 cams coming from USA and they will send them when they get them in from germany, so i hopethere is more power coming for me

yours seem to be down on power quite a bit.
the engine really responded to the service.
what do you think of the reflash. is really good for amount of money you pay?

I put down 194.2kw at the wheels with only an intake kit fitted, and I think it was 192kw with the stock airbox on. The intake made little to no difference but sure sounds nicer

Video here : http://www.youtube.com/watch?v=w4k0mtQmNZA

I guess to get a proper comparison you need someone else to run on the same dyno as you? I will scan/photograph the sheet if you would like to compare the curves.

thats a big jump from mine
what sorta of KW's are the Dave F ment to free up.
looks like you gained at least 12.
if you have a look at my graph you can see a flatspot around 2800.
is yours the same.

first dyno I had on my (then) stock S50B30 was at KPM, made 171.1 RWKW

did you use to live over here?
thats a big number in my opinion for a stock s50b30.

[GazM3]

dyno numbers themselves are not that useful in isolation where its more about the improvements.

on the reflash it was benificial but a lot of funds for a small gain i guess. the s50b32 is all about small incremental improvements rather than a magic power adder (in na form) giving a massive result. It will be interesting to see how car responds to the schrick284 cams

[digger]

thats a big number in my opinion for a stock s50b30.

seems pretty normal IMO 171rwkw/210kw is about 20% losses , your B32 makes good torque (more than B30) and lots from as low as 2500rpm peaking where the factory claims it does (3250rpm) but perhaps power falls off slightly early than it should at 6300rpm so you might be short 10-15rwkw.

[morerevsm3]

did you use to live over here?
thats a big number in my opinion for a stock s50b30.

yes, I used to live over there, but I stil spend every second or third week over there with work, and both my kids live in the hills.
it was an ECCA dyno day that I went to KPM

[holong]

yours seem to be down on power quite a bit.
thats a big jump from mine
what sorta of KW's are the Dave F ment to free up.
looks like you gained at least 12.
if you have a look at my graph you can see a flatspot around 2800.
is yours the same.

My graph has speed not rpm so I can't tell for sure, but I definitely have a similar flatish spot in the curve down low. I will upload it later on for comparison.

We actually before/after dynoed the car with the DaveF and it was only worth something like 2kw at the wheels vs a new stock filter. A couple of people have said I may have a 'freak' engine from the factory.

At the dyno day I out powered a Z4 M coupe by a couple of kw. Another e36 m3 which was lightly modded made about the same as me (full exhaust, no cats etc), and another made something like 167kw - both 3.2's.

[digger]

My graph has speed not rpm so I can't tell for sure, but I definitely have a similar flatish spot in the curve down low. I will upload it later on for comparison.

We actually before/after dynoed the car with the DaveF and it was only worth something like 2kw at the wheels vs a new stock filter. A couple of people have said I may have a 'freak' engine from the factory.

At the dyno day I out powered a Z4 M coupe by a couple of kw. Another e36 m3 which was lightly modded made about the same as me (full exhaust, no cats etc), and another made something like 167kw - both 3.2's.

For those that may not have seen there are few EVO numbers from this day

http://forums.eurocca.net/showthread.php?t=24373

and there is another thread of a dyno day with just E36 M3 at mercury motorsport.

people think that their stock cars will make stock power but in reality most S50 have done over 100k so perhaps the stock ones making ~190rwkw are not freaks but normal while others are more tired. Certainly some felt alot better than others when we looked for my dads.

17.5% losses puts the power in the 190ish area for a B32

It could just be the dyno used is different and thats why before and after comparisons are much more useful and certainly dyno days are better than dyno runs in isolation and peak numbers don't mean much either.

its not hard to convert from RPM to km/h in 4th gear

[morerevsm3]

17.5% losses puts the power in the 190ish area for a B32

except it is almost universally accepted that a dyno dynamics dyno has ~ 25% drivetrain loss if in shootout mode...


dynojet claim 15%, but seem to read very close to flywheel figures

[digger]

except it is almost universally accepted that a dyno dynamics dyno has ~ 25% drivetrain loss if in shootout mode...


dynojet claim 15%, but seem to read very close to flywheel figures

dyno dynamics in "std" mode yes, but not in shootout mode it is no way 25% on most machines using shootout, there are obviously a range of numbers that you'll get if you go to many different machines but if we start using 25% we are kidding ourself.

Even dynodynamics themself are using an optimistic ~20% for their on machines for their "bhp" and other flywheel output values common in the UK i.e "S_Nm" "S_hp" and metric equivalents "S_kW" and "S_Nm" are flywheel equivalents (estimations) scaled from rear wheel values by what works out to be 20%. Refer to post 1 in this thread it is Rear Wheel kW but Flywheel torque ( as indicated by S_Nm)..... you can check the numbers

104rwkw @ 3300rpm = 220lb-ft (300rwNm)
300/0.8 = 375 Nm as per graph

I have seen dozens of dyno dynamics graphs quoting values at rear wheels and values at flywheel and the correction used is 20% so it is no more than this and likely closer to 17.5% if there is such a single universal value for front engine RWD.

There are plenty of examples showing that 25% is hugely optimistic.

[slammedM3]

thanks heaps everyone.
exactly the info i was after.
nothing got explained to me after the dyno thats all.
it was all u need this and that.

so my engine is down a bit on top end power.
an inspection 2 could see this up into the 180's.
def after seeing Gaz's M3 respond to it.

[holong]

Here is my dyno sheet, sorry for taking so long to upload it. Green line is with the DaveF kit and black is stock box. The car was run with the DaveF first and then the original box was quickly put back in without removing the car from the dyno - hence the wierd AFR with stock box (no time for the ecu to relearn according to the dyno man).



The car has 172,000kms on the clock but has done a lot of highway kilometres and has been well looked after.

It is also on its 3rd vanos unit from new.

[Dus_M3]

Just finished fitting a GruppeM replica carbon cai, sounds awsome at WOT.
Any recommendations for a dyno in the northern suburbs?