Blown Engines (as in kaboom not forced induction)

[m5james]

Originally Posted by allmotor_2000

If it all works out, we can see 1000-1200whp

I'm sure it'll be safer on better built parts, but isn't that happening already?

[m5james]

Originally Posted by Mkai0

Interesting. I'm looking forward to an E85 setup.

I would as well since I've got an E85 station two exits north of me that I occasionally use to throw in 5 gallons when I'm feeling adventurous.

[boots]

Dayum 5 gallons. Are You running meth also? I've used 100 octane at the race course when I ran out of gas

[m5james]

No meth yet, just a stage 2 tune and then I watch AFR's via a tablet and the Torque app. I'm still trying to sell my Aquamist setup so I can buy the BMS JB4/BCM and meth setup so I can be assured of Terry's help.

[Lerxst M4]

Originally Posted by boots

Dayum 5 gallons. Are You running meth also? I've used 100 octane at the race course when I ran out of gas

I regularly put in about 4 gallons of E85 when I fill up in Houston. I have a station close by the office (Memorial City) and a Valero with Top Tier fuel (87, 91, 93, E85) near the house.

My car(s) love it!

[boots]

No e85 for me. Just 93

[DrKevM5]

Originally Posted by boots

I'm almost at 89k now. Knock on wood I've only had small issues since 11/2012. Same issues as any regular owner. Mines been tuned since they came out. Started w the Lil piggy. Then when the "tune" came out I was all in. I went from BR to a mild Br file that Eurocharged put in to a now a fantastic HCP tuned car. This one is a keeper. I can't invision this car wo a tune. I won't never go jb or meth because that's not my style. For others to push it further I think it's great because we are able to see how great this motor really is. I can't wait to see if anybody ever decides to fully stroke out this car and make it a badazz evil one.

You, Sir, are an ANIMAL

[John@BPC]

Hey guys,

We at BPC wanted to share with you that we've successfully completed our built short block and its back in the car, running, with our custom big turbo setup. We've began our tuning and are making large strides daily.

We will be offering these parts for sale for those of you who want to have the motors rebuilt locally, as well as a motor build program which includes machine work. This is a sleeved motor, custom pistons, custom rods.

Please feel free to reach out via PM or email
Thank you,
John

John@bimmerperformancecenter.com

[NightM]

Thats Alot of E85'u guys use. Lol. 5,4 way too much but it depends on how the car is running.

[allmotor_2000]

Ping me if anybody wants a long block assembly. I also have all the BMW gaskets,timing gear and coated bearings.

[M5Rlz]

So I guess if people are building short blocks its safe to assume around 750-900whp you are starting to get into the you might have problems if you tune it wrong category.

I really wish people would speak up, again its a forum lol, don't have to even mention your location just symptoms and what you did and go about your day. Pretty sure nobodies gonna try to track it down.

50+ engines I could see BMW starting to look at it closer lol but even that... I mean just using all of the new/ used 2012-2017 cars as a sample size off cars dot com... That puts failure rate at like 5ish-7ish%... And I'd bet half of the failures were attributed to incompetence/ laziness from shops/owners. Who because the platform is so under utilized didn't do it right.

[John@BPC]

Originally Posted by 335iRlz

So I guess if people are building short blocks its safe to assume around 750-900whp you are starting to get into the you might have problems if you tune it wrong category.

I really wish people would speak up, again its a forum lol, don't have to even mention your location just symptoms and what you did and go about your day. Pretty sure nobodies gonna try to track it down.

50+ engines I could see BMW starting to look at it closer lol but even that... I mean just using all of the new/ used 2012-2017 cars as a sample size off cars dot com... That puts failure rate at like 5ish-7ish%... And I'd bet half of the failures were attributed to incompetence/ laziness from shops/owners. Who because the platform is so under utilized didn't do it right.

We wanted to share these pictures of our customers M5 which was making so much torque that it bent a rod, causing it to score the cylinder walls, ruining the bore. This car was making 700whp SAE on DynoJet.

This lead us to a complete build on the motor to repair the damage. The Rod is definitely the weak point in this case.

[apexlocator]

So what was the torque reading?

[MrPowell]

From the Porsche world it is low end torque that kills the motors. My stock motor made 868rwhp/720rwtq SAE (on a Dynojet) on 25psi but towards the end I was running 27ish psi. When I decided to build the motor we had 4 of 6 rods that were bent that you could see when laying on a table; but the car was still running when motor came out. The motor a month and half before was still making 840-850rwhp in the middle of a Texas Summer.

The thing with keeping the motor happy was killing low end torque by having no timing in the mid range. I figure with these motors the exact samething can be done as long as the tune keeps that low end torque down. Basically not letting cylinder pressure spike early to save the rods.

[allmotor_2000]

Originally Posted by John@BPC

We wanted to share these pictures of our customers M5 which was making so much torque that it bent a rod, causing it to score the cylinder walls, ruining the bore. This car was making 700whp SAE on DynoJet.

This lead us to a complete build on the motor to repair the damage. The Rod is definitely the weak point in this case.

It has to be a multitude of factors, not just torque. I have 10K miles with > 800ft-lb torque at the wheels (closer to 900 past 5K miles) and I don't drive gently.

The effect of pre-ignition is MUCH worse on a rod than the torque produced by the motor.

If only ONE cylinder has a bent rod... its more likely pre-ignition than a systematic weakening due to too much torque.

[schnell1982]

Originally Posted by John@BPC

Hey guys,

We at BPC wanted to share with you that we've successfully completed our built short block and its back in the car, running, with our custom big turbo setup. We've began our tuning and are making large strides daily.

We will be offering these parts for sale for those of you who want to have the motors rebuilt locally, as well as a motor build program which includes machine work. This is a sleeved motor, custom pistons, custom rods.

Please feel free to reach out via PM or email
Thank you,
John

John@bimmerperformancecenter.com

Awesome !
Please share some pictures of some information on the parts you used.
It would be great to see some of these "built" motors get some recognition

[Msizzle]

Originally Posted by NightM

Thats Alot of E85'u guys use. Lol. 5,4 way too much but it depends on how the car is running.

i have been skeptical on running all that e85 with no tune for it so i tried it this weekend, based on my logs it didn't work well for me at all. the car was maxing fuel trims even at only 19psi, once i added meth and turned up the boost it got a little better but nothing like when i use 97+octane gas

[NightM]

Originally Posted by Msizzle

i have been skeptical on running all that e85 with no tune for it so i tried it this weekend, based on my logs it didn't work well for me at all. the car was maxing fuel trims even at only 19psi, once i added meth and turned up the boost it got a little better but nothing like when i use 97+octane gas

Lol. U race my teams vette. Lol. Of course that was a give. Best is run it with same car mods. But u still on the jb stuffs wont prolly do much vs flash tune

[M5Rlz]

Originally Posted by allmotor_2000

It has to be a multitude of factors, not just torque. I have 10K miles with > 800ft-lb torque at the wheels (closer to 900 past 5K miles) and I don't drive gently.

Not at all this is the same thing on the GTR.

Torque is the killer here. You have too much torque on stock rods and around 700-800whp/ 650+wtrq and you start to see this recurring symptom.


Also there isn't a large enough sample size to say whether or not you are an anomaly or standard.

Tuning, etc. all plays a factor, your guys might just have it more right than someone else, or you may very well just have a strong engine lol. Too many variables to say whats what, and especially on the M5 not a large enough sample size of power pushers to really start to develop a consensus. But its a great share by John to show high torque on these cars dialed in correctly will equally kill rods.

[allmotor_2000]

Not debating that torque kills - my motor could very well be a time bomb waiting to bust.

My point after seeing 10-15 blown motors, understanding what happened, people's setups etc, tuning seems to play a larger role at the 700wtq level.

High torque will break stock rods especially if the tune targets 30psi at 3K RPM. If the boost profile is more linear the motor seems to handle it better.

[John@BPC]

Originally Posted by 335iRlz

Not at all this is the same thing on the GTR.

Torque is the killer here. You have too much torque on stock rods and around 700-800whp/ 650+wtrq and you start to see this recurring symptom.


Also there isn't a large enough sample size to say whether or not you are an anomaly or standard.

Tuning, etc. all plays a factor, your guys might just have it more right than someone else, or you may very well just have a strong engine lol. Too many variables to say whats what, and especially on the M5 not a large enough sample size of power pushers to really start to develop a consensus. But its a great share by John to show high torque on these cars dialed in correctly will equally kill rods.

This is absolutely right, There are quite a few way to get around this problem with the various platforms of cars. Ramping boost and torque in is definitely key to motor and drivetrain longevity. It's hard to compare a 700hp motor to an 800hp motor, because the tune has almost all to do with the onset of power. Lets keep this discussion going and hopefully grow it, I find it fascinating to see what we can achieve with this awesome platform.

We can't let the Lambo and GTR guys have all of the fun The F10 M5 is an amazing car that does it all.

[TheHouseWon]

And the best way to control torque is to pull timing in lower rpm range? Or a combination of fuel, timing, and boost target?