[pjr710]

serious question ... has there ever been a dyno or spec sheet of the n54 motor with no FI on it?

[HawkeyeGeoff]

Why? Is this just a hypothetical question? Everything we say is just a guess....but i'd lean towards it being very similar to the N52.

[feuer]

Originally Posted by HawkeyeGeoff

Why? Is this just a hypothetical question? Everything we say is just a guess....but i'd lean towards it being very similar to the N52.

No N52. More HP than that. It would be an N53 without turnos and depending on the DME from 200hp to 270hp. Look it up.

[hassmaschine]

Originally Posted by feuer

No N52. More HP than that. It would be an N53 without turnos and depending on the DME from 200hp to 270hp. Look it up.

yeah, no it wouldn't. The N54 has smaller valves (by 3mm on the intake!), less lift, and the ports are waaaay smaller and rough-cast, while the N53/N52 have CNC'd ports. It also has lower compression - it would make a lot less power than an engine built to be N/A.

But it is a fairly pointless question, the N54 was meant to be boosted.

[pjr710]

It’s just a curiosity question. I’ve driven mine enough when the turbos were off. I always used to think it was just an “n52 with turbos” but i know it’s not. I was leaning towards it actually having less power than the n52 without FI tbh

[hassmaschine]

Originally Posted by pjr710

It’s just a curiosity question. I’ve driven mine enough when the turbos were off. I always used to think it was just an “n52 with turbos” but i know it’s not. I was leaning towards it actually having less power than the n52 without FI tbh

yeah, it really isn't - they have a lot of similarities, but they really aren't the same at all when you get down to it (even if they share many parts).

[blown07]

I would be surprised if it was 200 flywheel hp from my experience.

[pjr710]

Originally Posted by blown07

I would be surprised if it was 200 flywheel hp from my experience.

Yea i agree. I’d also like to know bc it can give you a good idea of how much HP you gain for each PSI of boost.

[Antetokounmpo]

You can sort of judge it based on how much boost it makes.

270whp on 22.7psi (absolute) peak boost.

270*(14.7/22.7) = 175whp

[pjr710]

Originally Posted by Antetokounmpo

You can sort of judge it based on how much boost it makes.

270whp on 22.7psi (absolute) peak boost.

270*(14.7/22.7) = 175whp

I’m for sure not fantastic at math. But how could you actually do that calculation. You would need to know the baseline HP. Otherwise you know it makes 270 WHP but you don’t know how much of that is coming from boost without that baseline. No?

[Antetokounmpo]

Originally Posted by pjr710

I'm for sure not fantastic at math. But how could you actually do that calculation. You would need to know the baseline HP. Otherwise you know it makes 270 WHP but you don't know how much of that is coming from boost without that baseline. No?

That's the point of this calculation.

You know baseline whp, 270 plus or minus 5 typically.

You know how much air it's adding past atmosphere, 8psi.

It's certainly not exact like I said but it gets you close. It will certainly be less than an n52 since compression is lower and timing is much less aggressive due to the turbos.

[pjr710]

Originally Posted by Antetokounmpo

That's the point of this calculation.

You know baseline whp, 270 plus or minus 5 typically.

You know how much air it's adding past atmosphere, 8psi.

It's certainly not exact like I said but it gets you close. It will certainly be less than an n52 since compression is lower and timing is much less aggressive due to the turbos.

WORD i see what you did .. 14.7 is atmosphere ... ur smart lol

[hassmaschine]

Originally Posted by Antetokounmpo

That's the point of this calculation.

You know baseline whp, 270 plus or minus 5 typically.

You know how much air it's adding past atmosphere, 8psi.

It's certainly not exact like I said but it gets you close. It will certainly be less than an n52 since compression is lower and timing is much less aggressive due to the turbos.

It's probably within 10-15% - depending on the efficiency of the turbos. Obviously it's not perfect but it's a good estimate. If you take an NA engine and double the atmosphere (14.5psi), you'll be somewhere near double the power (turbo efficiency and tuning need to be right, of course).

[N54_ABQ]

I was troubleshooting boost issues, disconnected vacuum lines to WG actuators and went for a drive... It was the slowest thing I've ever driven!

It felt slower than my 4cyl/auto S-10. And that thing maybe puts 80HP to the wheel.

[pjr710]

Originally Posted by N54_ABQ

I was troubleshooting boost issues, disconnected vacuum lines to WG actuators and went for a drive... It was the slowest thing I've ever driven!

It felt slower than my 4cyl/auto S-10. And that thing maybe puts 80HP to the wheel.

yep it blows .. when my car would go into limp mode from a boost leak i used to think "this is what a 328 feels like"

but after learning more about both cars i was thinking there's no way the 328 feels that slow.

[rjahl]

Originally Posted by Antetokounmpo

That's the point of this calculation.

You know baseline whp, 270 plus or minus 5 typically.

You know how much air it's adding past atmosphere, 8psi.

It's certainly not exact like I said but it gets you close. It will certainly be less than an n52 since compression is lower and timing is much less aggressive due to the turbos.

Timing is based on relative filling VE, without boost the N54 timing maps are not that much different. When you match timing at comparative VE they are a little slower than the N52 maps but I've attributed that to the direct injection .

[Riceball777]

the n54 was meant and built to be boosted. But seriously if you took the turbos off and built a header for it the car would probably make less than 200whp. i would guess somewhere in the 160-200whp range.

[zomski101]

When I got my car from the shop that installed my MMP stage 3 turbos, one of the vacuum lines was not connected to the boost solenoid, therefore very little boost. Boy was it slow, my rav4 was faster. Did a data log and according to Virtual Dyno on mustang setting, it said it made 215 whp, felt like 120 tho.

[V8bait]

They will put out nearly 200 wheel without boost. Someone ran one years back, I think it was Terry. Feels like 90whp though.

[JM98]

less than a 328i

[Jeff@TopGearSolutions]

If I had to guess it feels like 200HP at best, AKA slow.

It sounds like a real BMW though - Inline 6 N/A.

[Torgus]

Less power NA because of design even less of you are forcing it to push the turbos which are just dumping boost even if the wastes gates were open...It would be an inferior NA engine as stated above.

I have owned both, limp mode on an n54 is nothing like a well running n52 stock.