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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 > PTF UPDATE: 553WHP 631WTQ - N54 TwinTurbo World Record



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      11-14-2012, 12:38 PM   #111
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Originally Posted by RobBeck View Post
It is too preliminary to judge, but the head mods as we may later learn really cause the N54 as a whole to BEG for a large single. I have always felt that there will be major gains from a very high quality head mod for those guys with the ST.

Rob
I'm just saying that if the octane is there and the tuning is solid then the higher the compression the better the car will perform.
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      11-14-2012, 01:23 PM   #112
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I'm just saying that if the octane is there and the tuning is solid then the higher the compression the better the car will perform.
That could be the case with race gas + meth, but not necessarily in this case with pump+meth.
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      11-14-2012, 02:01 PM   #113
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I'm not afraid to say "congrats"!

While I have already picked my turbo upgrade choice already, that doesn't mean I cannot appreciate people pushing for progress.

I believe those with comments on either extremes (OMG, ITS AWESOME ... OMG, ITS THE SUXORS) are fun to read, but does not really contribute meaningfully.

Those who put the time and $$$ into "figuring" out and posting for other to see the data are contributing. So thank you very much for showing us the state of your investigation, looking forward to seeing more in the future.

Free speech is good, but its good to practice some discernment in what you say and how you read the comments.
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      11-14-2012, 02:04 PM   #114
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Quote:
Originally Posted by cupertinosteve View Post
I'm not afraid to say "congrats"!

While I have already picked my turbo upgrade choice already, that doesn't mean I cannot appreciate people pushing for progress.

I believe those with comments on either extremes (OMG, ITS AWESOME ... OMG, ITS THE SUXORS) are fun to read, but does not really contribute meaningfully.

Those who put the time and $$$ into "figuring" out and posting for other to see the data are contributing. So thank you very much for showing us the state of your investigation, looking forward to seeing more in the future.

Free speech is good, but its good to practice some discernment in what you say and how you read the comments.
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      11-14-2012, 02:21 PM   #115
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great #'s what clutch is he running now?
He is running the HPF Stage 2 Feramic Clutch
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      11-14-2012, 05:03 PM   #116
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Quote:
Originally Posted by cupertinosteve View Post
I'm not afraid to say "congrats"!

While I have already picked my turbo upgrade choice already, that doesn't mean I cannot appreciate people pushing for progress.

I believe those with comments on either extremes (OMG, ITS AWESOME ... OMG, ITS THE SUXORS) are fun to read, but does not really contribute meaningfully.

Those who put the time and $$$ into "figuring" out and posting for other to see the data are contributing. So thank you very much for showing us the state of your investigation, looking forward to seeing more in the future.

Free speech is good, but its good to practice some discernment in what you say and how you read the comments.
Good post. Its called maturity.
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      11-14-2012, 05:18 PM   #117
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Good post. Its called maturity.
Works both ways regarding both turbo result threads.
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      11-14-2012, 08:31 PM   #118
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Excellent results! All the people bitching about it "falling on it's face past 5k RPMs" are delusional. Do you know what 500whp at 6k RPMs feels like? That is a mountain of power vaulting you into triple digits before you can blink.
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      11-14-2012, 11:31 PM   #119
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Rough overlay of the RB n54 vs. SC s65.
Tough call.
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      11-15-2012, 12:00 AM   #120
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Rough overlay of the RB n54 vs. SC s65.
Tough call.
Different strokes for different folks?

I choose area under the curve since I don't DD on a road course.
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      11-15-2012, 07:34 AM   #121
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That RB car would eat that M3 alive
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      11-15-2012, 10:58 AM   #122
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That RB car would eat that M3 alive
Exactly, the N54 is OVER 500whp from ~4200rpm to ~6000rpms. The s65 hits 500whp right at redline. That means that throughout the whole pull the N54 is in the sweet spot and when you shift you're not losing an ounce of power. The s65 will barely crack 500 and then you'll have to shift and whenever the s65 shifts it's going to lose +/-50whp.

You guys need to be more concerned with what the graphs are telling you, not just looking at the shape of that mountain of torque and thinking that it falls on it's face.
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      11-15-2012, 12:17 PM   #123
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wow, that is indeed some crazy power!
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      11-15-2012, 01:07 PM   #124
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Congrats on getting the car back up, and the big numbers.

So we are talking RB upgrade, Ported Head, and upgraded intake piping. That's about a $10,000 plus price tag not to mention all the FBO mods needed. I wish the labor were less on pulling and swapping the head, book time is 38 hours.
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      11-15-2012, 01:17 PM   #125
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Stock intake piping for those runs, I beleive.
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      11-15-2012, 01:42 PM   #126
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Quote:
Originally Posted by SIKH335 View Post
Congrats on getting the car back up, and the big numbers.

So we are talking RB upgrade, Ported Head, and upgraded intake piping. That's about a $10,000 plus price tag not to mention all the FBO mods needed. I wish the labor were less on pulling and swapping the head, book time is 38 hours.
Stock intake piping and FAR less than $10k. If you pay 38hrs of labor to swap heads you have bigger issues to worry about than how much power your car will make. Please keep personal issues out of this thread. Thank you.
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      11-15-2012, 03:12 PM   #127
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They upgraded exhaust valves, but porting the head without upgrading valves flows almost the same and doing it at the same time with upgrading turbos saves a lot of hours. Porting shouldn't take too long.
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      11-15-2012, 03:24 PM   #128
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Quote:
Originally Posted by jazze90 View Post
That RB car would eat that M3 alive
Not to pick on you specifically, but general statements like that are what get people in a tissy. I would say that Stage 2 Drew would have something different to say about that.


In my opinion a dyno plot is NOT what happens in a airstrip run, you are typically starting at a certain RPM, usually designed to be in your sweet spot and then you go from there.

I would take into consideration the amount of time spent in a particular gear. Most dyno plots are done in 4th gear which has a particular performance characteristics and there a different profiles in 2nd, 3rd and 5th.

Lastly, I consider the usable RPM range spent in each gear. Keep the same speed and notice the amount of RPM change as you upshift or downshift from there. Its different, so then you would be a different state on the power curve.

For a more specific example, at the airstrip run with my car+mods ... 5000 RPM in 2nd gear is a challenging start since the torque spike causes me to lose traction which is sub-optimal and would spend a very short time in gear and then have to shift again. The better place for me to be would be around 4000 RPM in 3rd gear.

For a stock turbo FBO+meth car, 5000 RPM in 2nd may be the right place for it.

The key is to understand where your car fits in terms of power, gearing, traction ...
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      11-15-2012, 03:32 PM   #129
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Originally Posted by cupertinosteve View Post
Not to pick on you specifically, but general statements like that are what get people in a tissy. I would say that Stage 2 Drew would have something different to say about that.


In my opinion a dyno plot is NOT what happens in a airstrip run, you are typically starting at a certain RPM, usually designed to be in your sweet spot and then you go from there.

I would take into consideration the amount of time spent in a particular gear. Most dyno plots are done in 4th gear which has a particular performance characteristics and there a different profiles in 2nd, 3rd and 5th.

Lastly, I consider the usable RPM range spent in each gear. Keep the same speed and notice the amount of RPM change as you upshift or downshift from there. Its different, so then you would be a different state on the power curve.

For a more specific example, at the airstrip run with my car+mods ... 5000 RPM in 2nd gear is a challenging start since the torque spike causes me to lose traction which is sub-optimal and would spend a very short time in gear and then have to shift again. The better place for me to be would be around 4000 RPM in 3rd gear.

For a stock turbo FBO+meth car, 5000 RPM in 2nd may be the right place for it.

The key is to understand where your car fits in terms of power, gearing, traction ...
He said those specific cars and I believe assuming both of them having traction. You are correct but if you do the math and take gearing etc into consideration you will agreewith him that the RB dyno graph posted wins the M3 dyno graph posted.
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      11-15-2012, 03:36 PM   #130
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Congrats on getting the car back up, and the big numbers.

So we are talking RB upgrade, Ported Head, and upgraded intake piping. That's about a $10,000 plus price tag not to mention all the FBO mods needed. I wish the labor were less on pulling and swapping the head, book time is 38 hours.
Its not so bad...someone did it alteady
Actually someone getting a big single should do similar head porting perhaps even upgrading all the valves. It could be worth 100whp for a ST.
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      11-15-2012, 03:46 PM   #131
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I destroy a stock M3 from 60-120. Its by buddy's and I usually win by 8 to 10 lenghts depending on the weather. We have roughly the same HP & Weight and he is a DCT.....so you cant tell me that our TQ is unusable because that is the only major difference between our cars. Those RB's are amazing and I will take that TQ down low over a SC' M3 peak power any day!
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      11-15-2012, 03:55 PM   #132
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I destroy a stock M3 from 60-120. Its by buddy's and I usually win by 8 to 10 lenghts depending on the weather. We have roughly the same HP & Weight and he is a DCT.....so you cant tell me that our TQ is unusable because that is the only major difference between our cars. Those RB's are amazing and I will take that TQ down low over a SC' M3 peak power any day!
Im sure you mean his FLYWHEEL HP is the same as your WHEEL Horsepower, right?
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