Any long term dangers to BOOTMOD3 stage 1 on stock car?

[goto35]

GOt my f83 2 weeks ago. few people telling me to get the BOOTMOD3. seems unreal. adds 50-100 hp and 100ft lb torque.

Any long term effects or issues with engine doing the mod? Planning on keeping the car a while.

[aliiin]

If you get BM3, you should do a crankhub upgrade to be safe.

[RElias21]

Originally Posted by aliiin

If you get BM3, you need to do a crankhub upgrade to be safe.

Matter of opinion, which is perfectly fine. Def not fact though.

[l00semarble]

I have just Bootmod3 on stock M3. Just spun my crank hub. Not saying it caused it but this is a weak link and more power can reveal a weak spot. Teh problem is you need to spend $3K+ just to bulletproof the crank hub with no change/gain.

[NickyC]

Danger to manifold for sure.

[goto35]

Ok I'm so glad I posted this. Def not gonna do it now. Lol

[RElias21]

So subjective. Depends on driving style for sure, among other things for sure.

[goto35]

anyone without issues on a stock car?

[Driver407]

There are going to be vastly more people without issues than with, in regard to hub.
The percent chance it will happen is fairly small.

If you plan to track, drag, abuse the car - probably worth looking into
If you are running stage 2 or e85 - probably worth looking into
Pretty much any other use case - Your mileage may very. May not be worth it.

I had my hub done only because I track my car often and plan to keep it for several years. Just my 2 cents.
Ive had stage 1 and CS map on the car for 30k miles and not one issue. At 68k miles.

[Ropes]

Been tuned for the past 65k miles on a stock hub with a bulk of the miles on an E30 stage 2 map. The past 10k miles have been on a GTS map due to not wanting to push it too aggressive on 91 shit gas. The new work schedule has made the minor inconvenience of getting ethanol not worth it because of the increase in hours away from family. My experience with not having an issue with the crank hub is not the rule. I took the approach of if it happens then it happens. I am not going to do the fix until it does spin.

[TR930]

I'm wondering if BM3 tunes run better on non ( E10) blended gasolines?

[AlmondJayRoM3]

Got my 2016 with 20k miles and tuned it with BM3 not long after. Being a daily driver I’m at 55k miles now which includes a few track days a year. I’m of the mindset of not messing with it unless it spins and have money set aside for it or other expensive maintenance that might come along.

[maddmatth]

Get the crank bolt capture plate and then you're good.

Or just enjoy it stock, plenty of fun and less to worry about

[goto35]

Originally Posted by maddmatth

Get the crack bolt capture plate and then you're good.

Or just enjoy it stock, plenty of fun and less to worry about

How much is that?

[Shubacca]

Originally Posted by goto35

How much is that?

$105 + install / DIY

https://vargasturbo.com/product/vtt-...-bolt-capture/

[s55jesus]

I've been running BM3 E85 tune from Cary Jordan with just a capture plate for the past 10k miles and they definitely were not easy on the car. No issues. Just my personal opinion but I think the whole spinning crankhub is blown out of proportion. All my buddies who run similar E85 tunes just with a capture plate have not had any issues. It's personal preference at this point. If the upgraded crankhub makes you personally feel better, obviously go for it.

[RElias21]

I'll chime back in again here to further expand upon my prior comments…

As you've probably noticed, the main concern with BM3 or any increased power is the crank hub. I think that implicitly answers a lot your question (which was generally related to any issues). Generally, the F8X is pretty solid and even with increased boost, you're not looking at many issues other than possibly the crank hub.

Turning to the crank hub, there is no right or wrong answer. It's all about YOU. But, it's also important to be educated so you can make the right decision for yourself.

Based on all my reading of crank hub issues, my understanding is that irrespective of power level, it's all about downshifting. It's NOT about upshifting at all. That is, the crank hub doesn't slip on up shifts. It' slips on very aggressive downshifts. Also, it's generally more of an issue with DCT downshifting because of how much more aggressive the downshift is (and also if you downshift too quickly).

So, once again, it comes back in large part to your driving habits and usage of the car.

Personally, I have a 6MT and I think I can control myself enough to take it easy on the downshifting and save myself $4k. That's just me personally.
You have to decide for yourself though…Do you think you have enough self control to mitigate that issue? If so, you're probably a lot less at risk.

[HyeM3]

Originally Posted by goto35

How much is that?

Parts and labor should be no more than like $500

[HyeM3]

Originally Posted by RElias21

Based on all my reading of crank hub issues, my understanding is that irrespective of power level, it's all about downshifting. It's NOT about upshifting at all. That is, the crank hub doesn't slip on up shifts. It' slips on very aggressive downshifts. Also, it's generally more of an issue with DCT downshifting because of how much more aggressive the downshift is (and also if you downshift too quickly).

Downshifting isn't the actual cause of it but it can be what sets it over the edge when it's hanging on by a thread. The cause is from having more power than the stock hub can handle thus causing it to back out over time or overpower the friction plate holding it together. From what I've seen it usually happens soon after someone does a pull

[Ex_Stig]

I ran BootMod3 Stage 1 on my M3CS for two years without any issues whatsoever. Multiple track days and spirit driving.

[cobra2814]

Originally Posted by goto35

GOt my f83 2 weeks ago. few people telling me to get the BOOTMOD3. seems unreal. adds 50-100 hp and 100ft lb torque.

Any long term effects or issues with engine doing the mod? Planning on keeping the car a while.

As others have said, you can do the crank bolt capture and then have no issues on a stage 1 tune. It's what I plan to do next summer when my warranty expires. As far as I am aware, there have been zero reported issues of a spun crank hub with the stage 1 tune in place and the crank bolt capture installed. You don't need to do the full hub replacement for a mild tune.

[Shubacca]

Originally Posted by HyeM3

Parts and labor should be no more than like $500

Concur.

3.5-5 hour job. A great time to clean your front cooling radiators. You couldn't imagine the crap that gets collected in there.

https://f80.bimmerpost.com/forums/sh....php?t=1594892