M54. Let the foolishness begin.

[Wanganstyle]

I still need to purchase an S54, but the M54 would be sold.
(within reason).

Let me know when you are moving towards S54 and I would be glad to help in any way I can :)

*** i have a full set of s54 sensors here

[reelizmpro]

Thanks for the comparison. Good to see how the M54 compares to the S50. I'd like to see the torque curve of the S52 compared to these as well.

[hoveringuy]

As a reminder, here's about the best I got. The M54 just doesn't flow that well and a bigger bump on the cam won't help that.

Does fantastic on the bottom but doesn't carry as well as an S50.

This is with ZHP cams compared to normal cams. I got a few more hp.



Here's my M54 vs an S50. Same dyno back to back.

[digger]

250rwtq is about 295lb-ft @ crank. That would be about 98lb-ft/Litre which is just not possible in reality regardless of whether there is a printout that says it. The BMEP is too high. It would have to be the best NA engine every built to make those numbers.

Do the maths and physics, read off the graph the power is approx 193rwhp@5000rpm (by eye)

Power = Torque x rpm / 5252

Therefore Torque = 5252 * 193rwhp / 5000rpm = 202rwtq

The numbers don’t add up.

The power figures look normal maybe the rpm pickup is faulty or the curve is not rwtq but some other value.

Some times with dyno dynamics they convert rwtq to tq by correcting for coastdown losses (about 20% is a ballpark number) but there is usually a ‘S’ near the units to indicate this.

In any case the car doesn’t put down 250rwtq.

[Leo_328i]

S50 has less bottom end. My car has more torque at the bottom end accelerates quicker off the line until around 5000 rpm, when the S50 feels stronger.

I've always felt that the M54 was a better street motor and the S50 is a better track motor.

S50 has a better head that breathes easier, but M54 DISA/VANOS make more torques.



I still need to purchase an S54, but the M54 would be sold.

If anyone ever wants to meet up you're welcome to take my car for a drive (within reason).

Even with the ZHP cams?

[kariotahi]

that is because 250rwtq is not happening, do the maths on a 3L with those numbers and the specific torque output would have to be one the highest of all time

[Dozyproductions]

If anyone ever wants to meet up you're welcome to take my car for a drive (within reason).

So live in SOCAL THEN!

[hoveringuy]

So what are the big differences between this and an S50? Have you driven multiple swapped cars to compare?

S50 has less bottom end. My car has more torque at the bottom end accelerates quicker off the line until around 5000 rpm, when the S50 feels stronger.

I've always felt that the M54 was a better street motor and the S50 is a better track motor.

S50 has a better head that breathes easier, but M54 DISA/VANOS make more torques.

So what are you doing with the engine harness/ecu setup for the M54 is you go S54? :D

I still need to purchase an S54, but the M54 would be sold.

If anyone ever wants to meet up you're welcome to take my car for a drive (within reason).

[digger]

You're power curve looks much different without VANOS and DISA, but 250 torque... holly sh!t.

Great job!

that is because 250rwtq is not happening, do the maths on a 3L with those numbers and the specific torque output would have to be one the highest of all time

[Elysian]

So what are you doing with the engine harness/ecu setup for the M54 is you go S54? :D

[justice101]

So what are the big differences between this and an S50? Have you driven multiple swapped cars to compare?

[hoveringuy]

ZHP cam gains

I never did post the ZHP cam dyno...

First I will say the car feels quicker. The exhaust note has more bark to it and even my nephew said the car sounds different.

I was expecting slightly more out of the dyno, but it has the exact same tune as before and there's probably new gains to be found with tuning.

Also, I clearly have something going on at 6200 rpm. Most likely in the ECU since I have both cams pegged against the stops at that point.

This is on the same dyno, stock cams vs ZHP cams. I had a few runs with more power or more torque, but this was the best comparison.



Just for fun, I took the rear muffler off (dynomax turbo) leaving just the Borla center muffler:

[328ijunkie]

Very interesting!

[Leo_328i]

Nice work mate. This is truly an inspiring build.

Can't wait to see you do an S54 or N52, I reckon the latter would be a more interesting swap as in the near future, these motors will be unbelievably common as they have been chucked into almost every single BMW series made from 2006 onwards.

Really interesting to see the effects of the variable inlet and exhaust cams, DISA, larger throttle body, etc.

Good on ya mate! :)

[Leo_328i]

Nice work mate. This is truly an inspiring build.

Can't wait to see you do an S54 or N52, I reckon the latter would be a more interesting swap as in the near future, these motors will be unbelievably common as they have been chucked into almost every single BMW series made from 2006 onwards.

Really interesting to see the effects of the variable inlet and exhaust cams, DISA, larger throttle body, etc.

Good on ya mate! :)