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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > **627WHP@22.5psi** Vishnu/FFTEC Single Turbo System Dyno Session #3 (PROcede Tuned)



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      02-22-2012, 01:23 PM   #111
vasillalov
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There is a slight upward slope from 5500RPM and up. The efficiency of the engine is not geared toward high RPMs, so the breathing is not conducive to upward sloping torque curves. The boost level climbs to compensate, and it looks like there is indeed a slight increase in torque. This would be easier to accomplish with different cams, too.
I see. That makes sense! I think the next thing Shiv needs to do is try a ported head and also try to gain control over VANOS (If at all possible with piggies). VANOS can be adjusted from -72 degrees to +72 degrees on both intake and exhaust.
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      02-22-2012, 01:32 PM   #112
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I see. That makes sense! I think the next thing Shiv needs to do is try a ported head and also try to gain control over VANOS (If at all possible with piggies). VANOS can be adjusted from -72 degrees to +72 degrees on both intake and exhaust.
That's cool and thanks. But I think I'm good for now.
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      02-22-2012, 01:36 PM   #113
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      02-22-2012, 01:36 PM   #114
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Damn.... sooo dirty and nasty! I want a 600+ whp N54 too!! Congrats Vishnu!
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      02-22-2012, 01:37 PM   #115
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So far, fuel system is well within its limits. Fuel trims aren't even closed to being maxed out. I suspect we will limits right around 660-675whp. Which is nice since we still have one more upgrade to make which should support well over 800whp by my calculations. Still no misfire. Still no signs of knock retard. Everything is looking and sounding beautiful. AFR via external wideband AFR is still in the low 12s.
So all those people who thought I was talking out my a$$ about the N54 making it to 800hp...well....you can now kiss my

Good job Shiv....many of us here in South Florida are debating this, and to think about it, I was the first person to say it would make it to 800 hp and I will hold to this belief whereas many thought it was a ridiculous idea.
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      02-22-2012, 01:47 PM   #116
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Seriously though, do you think you can run 600whp as a daily driver and not risk the integrity of the engine? (long term speaking)

Also what do you think the limit on HP with stock internals?
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      02-22-2012, 01:52 PM   #117
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Shiv,

Do you mind sending an oil sample from your single turbo N54 to BlackStone Labs for some analysis? It'll be nice to see if the engine is really holding up to these levels of power output!
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      02-22-2012, 01:56 PM   #118
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That is insane guys. Keep up the good work!
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      02-22-2012, 01:59 PM   #119
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Quote:
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Seriously though, do you think you can run 600whp as a daily driver and not risk the integrity of the engine? (long term speaking)

Also what do you think the limit on HP with stock internals?
I learned long ago that your toy car shouldn't be your only car. $0.02
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      02-22-2012, 02:08 PM   #120
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impressive..
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      02-22-2012, 02:09 PM   #121
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I learned long ago that your toy car shouldn't be your only car. $0.02
I know that would be a great idea but I don't have another vehicle... Lol I'll just have to hope for the best.
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      02-22-2012, 02:11 PM   #122
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      02-22-2012, 02:14 PM   #123
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Whats the most powerful non-built bmw engine every?
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      02-22-2012, 02:25 PM   #124
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Quote:
Originally Posted by shiv@vishnu View Post
We don't need a smaller turbo to make a fatter power band. If we ran the same midrange boost as we did with our max tune ASR+FBO/Meth set up, torque peak would probably be around 550lbft tapering gradually to ~460lf-ft at redline. Which means that we would pick up around 50-60WHP all throughout the midrange. Car would be much quicker but also unnecessary aggressive at this somewhat premature point in time.

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      02-22-2012, 02:28 PM   #125
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Another thing we should start looking at is raising the rev limit. I just did the math and at 7,000rpm, our N54 piston speed is only at apx. 21m/s! That's by no means fast, and even raising up to 8000rpm (mps of 24) should not come close to breaking the hydrodynamic oil film.

Someone care to be the guinea pig? In theory, throwing in tougher valve springs might be the only insurance needed to raise the rev limit to 8000...
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      02-22-2012, 02:31 PM   #126
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Quote:
Originally Posted by venom3469 View Post
Seriously though, do you think you can run 600whp as a daily driver and not risk the integrity of the engine? (long term speaking)

Also what do you think the limit on HP with stock internals?
Just switch map or lower the boost. You dont need to be boosting @ 21+ PSI all the time...
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      02-22-2012, 02:34 PM   #127
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Whats the most powerful non-built bmw engine every?
If you're talking about production street legal cars, I would say the BMW motor in the McLaren F1. The M-developed S70 6.0L V12 naturally aspirated motor produced 618 hp stock.

Wow. Shiv's motor makes significantly more hp than the McLaren F1 engine!
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      02-22-2012, 02:35 PM   #128
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Another thing we should start looking at is raising the rev limit. I just did the math and at 7,000rpm, our N54 piston speed is only at apx. 21m/s! That's by no means fast, and even raising up to 8000rpm (mps of 24) should not come close to breaking the hydrodynamic oil film.

Someone care to be the guinea pig? In theory, throwing in tougher valve springs might be the only insurance needed to raise the rev limit to 8000...
We were toying with the idea of raising the rev limiter a bit. But generally speaking, running higher revs puts far more load on rods than running more boost. And we are already making a ton of power so it's probably not a good fit to raise rev limits at this time. Plus, raising rev limits can void your warranty (see sticky thread about FASTA data/tune detection)
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      02-22-2012, 02:37 PM   #129
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Quote:
Originally Posted by shiv@vishnu View Post
We were toying with the idea of raising the rev limiter a bit. But generally speaking, running higher revs puts far more load on rods than running more boost. And we are already making a ton of power so it's probably not a good fit to raise rev limits at this time. Plus, raising rev limits can void your warranty (see sticky thread about FASTA data/tune detection)
Yeah, not like the single turbo voids anything either
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      02-22-2012, 02:38 PM   #130
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Hey Shiv. Thanks for doing the 94 pump non-meth dyno. What do you think is the theoretical limit for 91 octane pump gas only? This would be the bottom line WHP the kit would make then.

Also, with the step down small turbo, what's the max range on that? 600whp?
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      02-22-2012, 02:40 PM   #131
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Hey Shiv. Thanks for doing the 94 pump non-meth dyno. What do you think is the theoretical limit for 91 octane pump gas only? This would be the bottom line WHP the kit would make then.

Also, with the step down small turbo, what's the max range on that? 600whp?
91oct fuel is nasty. Getting a single turbo system capable of supporting 600-700whp and NOT running pwm meth is criminal. Without meth, you will probably be limited to 460-480whp on 91oct. Just a guess though as all of my dyno testing has been on 94oct (with or without meth).

And yes, the smaller turbo should easily be able to make 600whp. We'll confirm that soon enough with CupertinoSteve's 6AT car.

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      02-22-2012, 02:43 PM   #132
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And this is just the beginning...

I'm still amazed that the internals/head/intake manifold have not been touched. 627whp with a Bolt-On kit, amazing!

And not even running race gas or the higher reading MAP sensor yet....
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