E36 M3 321BHP????

[dannylt]

Andrew D said:

dannylt said:

The rolling road correct for power at the wheels to give power at crank which is what generally is always quoted. So in your case you've scaled it up twice. 87% is doing very well for a RWD car - seem unlikely to be that good.

?

Couldn't really decipher what your post meant.

I meant, even though the rolling road directly measures power at the wheels, almost always the number quoted has been corrected to be the crank number. So you cannot apply your 1/87% scaling again - it's already been done! Every rolling road I've been to does this - because everybody seems to quote crank numbers. Of course, the corrections are probably done differently, but then the rolling road calibrations vary too.

[swansea v6]

So it seems some of the M power cars vary quite a lot with their power outputs, how do the non M power cars compare? i.e E36 325i and E36 328???????

Edited by swansea v6 on Tuesday 19th September 12:15

[vixpy1]

swansea v6 said:

So it seems some of the M power cars vary quite a lot with their power outputs, how do the non M power cars compare? i.e E36 355i and E36 328???????

Non m-power cars are generally really good on the power..

[gaz1234]

[quote=craigAMV8]Just sold an 04 plate m3 smg. Had DMS do some work on it and it then produced 373bhp, took it on the rabbit run for the last 3 years (check out their site www.rabbit-run.co.uk its an amazing event)and it did a true gps'd 176mph. I have just bought a V8 Vantage wich is lovely, but not a quick as the M3, I miss it a bit actually.



Pricy!

[craigAMV8]

gaz it was pricy, but in some ways (not all) its worth it

[Dave 321]

BRoCceRs said:

Dave 321 said:

Thats good power from std car! Not many ever make that..What torque figure??

From the bottom of the bog reading magazine basket Ive found issue 66 of Total BMW.

261.5 @ 5582.

Mine was 288lbft at 5891rpm.. Strange! Mine had Gruppe M, otherwise STD.

[andygtt]

whats stranger still is that 288lbft at 5891rpm = 323bhp!

[Dave 321]

andygtt said:

whats stranger still is that 288lbft at 5891rpm = 323bhp!

Howd you work that out?

[pentoman]

Power = (torque x rpm) / 5252

[andygtt]

Basically BHP is simply a calculation of what torque the engine produces x rpm.

[hongkongfooi]

ChrisE said:

Ive heard these power claim rumours myself, which along with the vanos problems with the evo's is the reason I opted for the 3.0ltr non evo E36. Out of interest does anyone know if the 286bhp power claims on this engine were optimistic?

The 3.0 M3 power output is nearer to the claimed figure than the evo's.

[swansea v6]

How can manufacturers get away with not givingaccurate power outputs for their cars? having looked into getting a cerbera I am amazed that their 4.5 V8 is well known for being down on its quoted output of 420BHP, how come??

[BRoCceRs]

vixpy1 said:

I don't get Total BMW but would be interested to see the results and comment.

bhp/rpm lb.ft/rpm

Superbow 1998 S50 47000 CF induction 327 7312 262.9 5597
broccers 1999 S50 30000 Stock 322 7242 261.5 5582
jon_XL 1999 S50 53500 Supersprint exhaust 321.4 7450 264.8 5468
j1muv 2002 S54 21000 Induction, Exhaust 318.7 6913 280.5 5048
Jno S50 315.8 7351 256.1 5511
Col 1999 S50 65000 ‘slightly modded’ airbox 310.5 7267 255.4 5426
Jules78 1999 S50 58000 314.5 7438 253.1 5566
sgwilt999 1999 S50 7000 313.9 7361 254 5565
blackZm 2002 S54 47000 305.5 7034 269.4 4834
‘MC’ MarkC 1998 S50 58000 CF intakeRe-mapACS exhaust 305.5 7448 250 4761
Khooni 2000 S50 10000 K&N panel+Exdos 303.9 7204 246.7 5734
Cyclone TVRCerbera 406 7150 357 5285

[vixpy1]

Broccers, where were they done, and did you get any wheel figs?

[BRoCceRs]

Nobles @ Chesterfield - Cyclone (Jules)is a member here, you may want a word with him to see how spot on the figures were.

[vixpy1]

Interesting, I know Jules, nobles rollers usually tie in with ours.



Cheers for that

[vixpy1]

Whats more interesting is that the S54 results are exaclty what we got with them, but some of the S50 are a little higher (10bhp) or so.

Guess its just a different spread of cars