Tuned my F15 50i - BM3

[pennsiveguy]

Originally Posted by pits200

I've had no misfires and no knock detection on the pulls. From that perspective it's light years better.

I still can't believe how many engines the prior tune most likely blew. Go onto the bm3 Facebook site, plenty of n63tu failures with people running ots bm3 tune.

That's great news, thanks for the update. Who knows...maybe my plugged up cats stifled my performance enough to save my rods.

How does the new tune pull, as far as you can tell?

[Sophisticated Redneck]

Originally Posted by pits200

I stated this a bunch of times, octane booster is unnecessary. It's cheaper and better for your car to just add 2 gallons of e85 to the tank, the wideband sensors can adjust for the difference.

As for bm3, they finally published a new tune. If anyone is running the old one, I highly recommend you get off it, there is no doubt in my mind that the tune has caused many engine failures across the n63tu platform.

Also, I don't think halim from bm3 doesn't actually knows shit about tuning. His logic for why he backed off torque and boost because it snaps rods is stupid. The majority of thr issues aren't from too much torque, it's from poor tuning causing detonation.

If they can't create a proper tune to go with their product, they shouldn't even offer the tune with the bm3 package.

I disagree, here in AZ when it's busting 118 out and all we can get us crap 91, 2 gallons of e85 is barely going to bump you to 93 and that's assuming it's actually 80+ percent, not lower. In AZ legal low limit is 55 percent.(Fine for a stage 1 but not stage 3 most are running). Anyone running a tune for 93 should be running two points over minimum for some safety margin. As you mentioned, the amount of bent rods out there on these tunes is way to high. To each their own of they want to use octane booster or not but should be 93 minimum in the tank for a 91 tune and 95 in the tank for a 93 tune.

[pits200]

Originally Posted by Sophisticated Redneck

I disagree, here in AZ when it's busting 118 out and all we can get us crap 91, 2 gallons of e85 is barely going to bump you to 93 and that's assuming it's actually 80+ percent, not lower. In AZ legal low limit is 55 percent.(Fine for a stage 1 but not stage 3 most are running). Anyone running a tune for 93 should be running two points over minimum for some safety margin. As you mentioned, the amount of bent rods out there on these tunes is way to high. To each their own of they want to use octane booster or not but should be 93 minimum in the tank for a 91 tune and 95 in the tank for a 93 tune.

There is a reason the tune is called what it is based on octane. If you can't run a "93 tune" on 93 octane and everything else on your car is I'm good order, then it's not a 93 tune. Same goes with 91.

Just because bm3 is a bunch of idiots that on't know octane limits and how to properly build a tune based on that octane is the reason for all this. If you are forced to run octane booster after filling up with 93 on what is suppose to be a 93 tune, simply put the tune is too aggressive. Not sure why there is questions on this, they should call it a 95 tune.

The morons on the last tune were pushing so much boost in the upper rpm range that it was well outside the compressor efficiency range. He then told me they did a flat boost curve to save the rods. Honestly, they are idiots, I'm shocked they would be so cavalier with the tune but they know they have zero liability and all they car about is getting as many platforms to be compatible with their product.

[skoold2003]

Originally Posted by pits200

I've had no misfires and no knock detection on the pulls. From that perspective it's light years better.

I still can't believe how many engines the prior tune most likely blew. Go onto the bm3 Facebook site, plenty of n63tu failures with people running ots bm3 tune.

You're still running bm3??

[pennsiveguy]

Originally Posted by Sophisticated Redneck

I disagree, here in AZ when it's busting 118 out and all we can get us crap 91, 2 gallons of e85 is barely going to bump you to 93 and that's assuming it's actually 80+ percent, not lower. In AZ legal low limit is 55 percent.(Fine for a stage 1 but not stage 3 most are running). Anyone running a tune for 93 should be running two points over minimum for some safety margin. As you mentioned, the amount of bent rods out there on these tunes is way to high. To each their own of they want to use octane booster or not but should be 93 minimum in the tank for a 91 tune and 95 in the tank for a 93 tune.

Where are the stories of bent rods? I'm not challenging you, just asking where you're reading/seeing them so that I can have a look for myself.

[Sophisticated Redneck]

Originally Posted by pits200

There is a reason the tune is called what it is based on octane. If you can't run a "93 tune" on 93 octane and everything else on your car is I'm good order, then it's not a 93 tune. Same goes with 91.

Just because bm3 is a bunch of idiots that on't know octane limits and how to properly build a tune based on that octane is the reason for all this. If you are forced to run octane booster after filling up with 93 on what is suppose to be a 93 tune, simply put the tune is too aggressive. Not sure why there is questions on this, they should call it a 95 tune.

The morons on the last tune were pushing so much boost in the upper rpm range that it was well outside the compressor efficiency range. He then told me they did a flat boost curve to save the rods. Honestly, they are idiots, I'm shocked they would be so cavalier with the tune but they know they have zero liability and all they car about is getting as many platforms to be compatible with their product.

I think it goes beyond just one tuner, BMW leaves quite a bit on the table for safety, its not as if these tuners know more then BMW, they are just trading that margin for the performance and IMHO ALL tunes are overrating what the lowest octane you can run.

All it takes is one stupid move like forgetting your in manual and leaving it stuck in 6th while you are creeping along and decide to open it up but you don't complete smash the throttle so you never have an override kickdown...the safety margin is now gone and chaos ensues

My whole point was, trust nobody and run at least a few points over, octane boosters, a mix of E85, racegas/91/93mix, unicorn jizz, whatever will boost the octane. All have their pros/cons, but never, ever run the minimum recommend for the tune.

[Sophisticated Redneck]

Originally Posted by pennsiveguy

Where are the stories of bent rods? I'm not challenging you, just asking where you're reading/seeing them so that I can have a look for myself.

Sure, your going to find most of the stories on the M5 boards, much higher amount of tuned rides compared to X5's. Same engine internals as the N63tu, Below are a few links. You will see it is not limited to any specific tuner. Even on my older E70, a tune allows the boost to go sky high unchecked at low rpm in high gear, I only noticed it as installed boost gauges, otherwise I would have assumed there would be a torque limit at low vehicle in the higher gears.

IMHO, I think the elephant in the room is with a tune you remove all safety margin and its real easy to bend a rod with one wrong move.


EDIT: Unfortunately it appears this board filters external links. You can find them easy enough with a google search for the blocked ones.

https://www.***********.com/showthre...ds-on-DME-tune

https://f10.m5post.com/forums/showthread.php?t=1395678

https://www.european**********/conte...-repair&page=2

https://f10.m5post.com/forums/showthread.php?t=1721993

https://f10.m5post.com/forums/showthread.php?t=1641598

https://www.m5board.com/threads/bimm...-heavy.581578/




Words of wisdom from a Member who runs 9's in his M5:



"Guys. Rods bend for a few reasons:

1. Just a lot of boost... this won’t happen until 900ft-lb torque at the wheels on this V8
2. The #1 season it’s gonna bend is due to tuning. Pre-ignition, detonation etc. can cause even forged rods to bend

So...

1. Don’t just go around flooring your 26psi map. Anything above 22psi you need to log first and ramp up
2. ALWAYS run 95 AKI or above. 100AKI for 25psi and 110AKI for 30psi
3. Maintain your plugs, oil and monitor general motor health like lealdown every 5K miles
4. Take an oil analysis every oil change (3K max if you are pushing 800-900hp)

My Frozen M5 lasted 20K+ miles at 800/800+"

Post taken from thread at: https://f10.m5post.com/forums/showthread.php?t=1511428

[pennsiveguy]

Originally Posted by Sophisticated Redneck

Sure, your going to find most of the stories on the M5 boards, much higher amount of tuned rides compared to X5's. Same engine internals as the N63tu, Below are a few links. You will see it is not limited to any specific tuner. Even on my older E70, a tune allows the boost to go sky high unchecked at low rpm in high gear, I only noticed it as installed boost gauges, otherwise I would have assumed there would be a torque limit at low vehicle in the higher gears.

IMHO, I think the elephant in the room is with a tune you remove all safety margin and its real easy to bend a rod with one wrong move.


EDIT: Unfortunately it appears this board filters external links. You can find them easy enough with a google search for the blocked ones.

https://www.***********.com/showthre...ds-on-DME-tune

https://f10.m5post.com/forums/showthread.php?t=1395678

https://www.european**********/conte...-repair&page=2

https://f10.m5post.com/forums/showthread.php?t=1721993

https://f10.m5post.com/forums/showthread.php?t=1641598

https://www.m5board.com/threads/bimm...-heavy.581578/




Words of wisdom from a Member who runs 9's in his M5:



"Guys. Rods bend for a few reasons:

1. Just a lot of boost... this won’t happen until 900ft-lb torque at the wheels on this V8
2. The #1 season it’s gonna bend is due to tuning. Pre-ignition, detonation etc. can cause even forged rods to bend

So...

1. Don’t just go around flooring your 26psi map. Anything above 22psi you need to log first and ramp up
2. ALWAYS run 95 AKI or above. 100AKI for 25psi and 110AKI for 30psi
3. Maintain your plugs, oil and monitor general motor health like lealdown every 5K miles
4. Take an oil analysis every oil change (3K max if you are pushing 800-900hp)

My Frozen M5 lasted 20K+ miles at 800/800+"

Post taken from thread at: https://f10.m5post.com/forums/showthread.php?t=1511428

Thank you. Really grateful. Some nice light reading. Whatever they've done, I want to make sure I'm not doing.

I've enjoyed having a faster version of the vehicle I bought. I have no problem with pay-to-play. But the F15 is my daily driver and road trip stallion. I don't like the newer G generation at all, and would like to keep driving my F15 for a bunch more years. I've taken meticulous care of it, flash tune notwithstanding. Anything that gets in the way of me driving it for several more years is a no-go.