M54 Madness, the remix

[mike25]

Giving up DISA and /or the new exhaust seems to have cost a lot of torque below 4000rpm?
Looking back at your earlier dynos this change definitely takes you over to the Dark Side! - Top end high revving power gained at the expense of torque below 4k rpm.

It would be interesting to see this dyno compared to a stock M50B25, not for absolute figures, but for how the power is delivered. I suspect you've gone a long way to achieving your objective of performance like the M50B25 with a rising crescendo as it comes on song over 4000rpm?

[nando]

if anything, a bit of mechanical retard is helping your top end power - assuming it's the intake cam.

[hoveringuy]

Here's the plot. I'll let everyone digest this and then post the old motor superimposed with this plot.

Keep in mind, intake cam static timing is off by 6 degrees (more retarded), VANOS seals are weak so the cams aren't tracking that great, ignition timing is probably Ok but not optimized. Fuel seems fine.

Of course, the 6000 rpm rev limit ghost in the software.

Still 232 at 6000 isn't a bad start...

[mike25]

Yes, sort of.

The short answer is 230hp at 6000rpm. I still have a rev limit that I can't get rid of. Somehow it got stuck at 6000 and wouldn't change to 7200.

My intake cam is also retarded 6 degrees in static timing and the VANOS seals are weak, torque wasn't that strong down low.

Once I get everything sorted still looking for at least 240.

........... The pull of the Dark Side ? .........

Top end power figures quoted: bottom end torque loss noted !

But I guess the real test for a daily drive is - How does it drive in regular daily traffic?

[Jaker]

Any plots that you can share? I'm very curious about what the torque curve looks like. As you may remember, I am planning a dual Vanos converison on my 3.0 single Vanos build. I want more area under the curve to the left of the graph.

[hoveringuy]

Yes, standard Dynojet whp. With Schrick cams and M50 intake it's configured to make power up to 7000 so if the rev limiter hadn't kicked in, who knows?...

As an aside, I tore down the old engine when the swap was all done. This was the engine that I essentially bought for scrap because it had overheated when it lost coolant. I had to Timecert the block and heat-straighten the head. It was in amazingly good shape. I expected to see upper ring damage or piston scuffing but none.

[2mAn]

Yes, sort of.

The short answer is 230hp at 6000rpm. I still have a rev limit that I can't get rid of. Somehow it got stuck at 6000 and wouldn't change to 7200.

My intake cam is also retarded 6 degrees in static timing and the VANOS seals are weak, torque wasn't that strong down low.

Once I get everything sorted still looking for at least 240.

Those are great numbers, are those at the wheels, because thats damn good!

I still will never forget you letting me drive your car. What an experience. Absolute torque monster, awesome for a daily driver. Love your updates, keep em coming

[hoveringuy]

Any Dyno news?

Yes, sort of.

The short answer is 230hp at 6000rpm. I still have a rev limit that I can't get rid of. Somehow it got stuck at 6000 and wouldn't change to 7200.

My intake cam is also retarded 6 degrees in static timing and the VANOS seals are weak, torque wasn't that strong down low.

Once I get everything sorted still looking for at least 240.

[Jaker]

Ya! What's up with the build?

[mike25]

Any Dyno news?

[digger]

Hi,

i want to use the M5430 with Ecumaster EMU ECU. Has anyone maybe an pinout from the original MS43 ECU?
I can't find a goog one.

email Rama at http://racehead.com.au/

[bmwmaster81]

Hi,

i want to use the M5430 with Ecumaster EMU ECU. Has anyone maybe an pinout from the original MS43 ECU?
I can't find a goog one.

[hoveringuy]

Any chance of posting your MSQs?

send me a PM with your email and I'll send one to you.

[Ahmedsinc]

Any chance of posting your MSQs?

[butters]

I made good power with mine and I don't remember them being that much louder than stock (on stock exhaust)

Stock exhaust might be the key there.