[socal330i]

Well I've done it folks, I was doing some spirited driving in Mexico and powershifted stupidly from 3-4 (2) without backhanding... I popped the clutch back in in well under a second but not before it probably at least partially engaged, locking up the tires and killing the engine. I figured it would never start again but after getting a jump it started no problem without any weird noises. A month later and I'm still seeing no issues/changes. However I'm not an idiot, a misshift that severe is almost bound to do something and I wanted to get some advice on what I should do. Also worth noting, I got a "timing over retarded" code 2x but I cleared it and haven't gotten one since. If anyone has any advice for me on what to do I'd greatly appreciate it

[hassmaschine]

If its running fine, whats the problem?

FWIW i did something similar more than a year ago - somehow ended up in 2nd when i meant for 4th. The tires chirped but i quickly pushed in the clutch. There is a maximum rev counter stored in the DME, which i think was like 7800. Never had a single issue since.


I swear modern BMW owners are a bunch of hypochondriacs... Drive it and be happy you didnt blow it up!

[socal330i]

I can't help but being nervous, a moneyshift at 100mph has a potential of revving the engine to 10k... But thanks for being reassuring!

[socal330i]

Also how do you check the DME? I'm wondering what I revved it to

[PhaseP]

Money is still in your pocket, didn't happen!
+1 on Hass's post if it works, no problem.

moneyshift at 100mph has a potential of revving the engine to 10k

No, depends on the gear ratios of particular transmission and differential but I have a spreadsheet of mine lying around from years back and according to it 2nd gear redline will be over 100 mph higher with these cars. If that was what you had you would be fine. Tires spinning would make it rev higher though.

[PhaseP]

No, depends on the gear ratios of particular transmission and differential but I have a spreadsheet of mine lying around from years back and according to it 2nd gear redline will be over 100 mph higher with these cars. If that was what you had you would be fine. Tires spinning would make it rev higher though.

Correction Edit: I was looking at wrong values, 2nd will be maxing out at 7K rpm at 70mph. That would make 100mph at 2nd 10K rpm. You were right.

[hassmaschine]

Originally Posted by socal330i

I can't help but being nervous, a moneyshift at 100mph has a potential of revving the engine to 10k... But thanks for being reassuring!

If you have INPA i can tell you how to read it. Normally its "hidden".

[socal330i]

I have no clue what INPA is could you explain it more?

[hassmaschine]

BMW Tools - factory diagnostic software.

[socal330i]

Hmm I don't have it unfortunately, I've heard a dealer can read it but they'd probably charge me

[hassmaschine]

The dealer wouldn't know how to use it to find the maximum rev counter anyway.

if you get a D-CAN cable from BimmerGeeks they can hook you up with the software.

[socal330i]

Wow good to know! Well I'll order the cable as soon as I get the chance

[e90dum]

dude I ran my engine without oil for ~15-20 seconds before a track day. 20k miles later i'm still good

edit: I'm sorry everyone i really like to drunk bump old threads

[Wally_84]

Originally Posted by hassmaschine

If you have INPA i can tell you how to read it. Normally its "hidden".

hassmaschine Could you please share your knowledge and tell INPA users how to find that data?

Since I've read your reply I've been searching all over INPA but without any luck. And here I thought I already knew most of INPA features

My INPA is in german MSV70.0 btw.

[socal330i]

Update: the engine blew upon startup and I'm currently getting a used motor swapped in... It isn't called a moneyshift for no reason...

[atmosphericM]

I always thought the "moneyshift" was from 4th to 6th to save money on gas... lol (Probably just because that's how I drive.. I literally use 5th gear once a week at best.)

Sorry to hear about your troubles man..

[TheTallJS]

the bpc guys ran their engine at 8200rpm. Probably wears out the bearings a lot more. I'm interested to see what part failed in your dead engine

[W37V]

Originally Posted by TheTallJS

the bpc guys ran their engine at 8200rpm. Probably wears out the bearings a lot more. I'm interested to see what part failed in your dead engine

at 8200 BPC experienced valve float. Wouldn't be surprised if his piston kissed a valve at 10,000 rpm.

[e90dum]

Originally Posted by socal330i

Update: the engine blew upon startup and I'm currently getting a used motor swapped in... It isn't called a moneyshift for no reason...

No way...

[hassmaschine]

Originally Posted by W37V

at 8200 BPC experienced valve float. Wouldn't be surprised if his piston kissed a valve at 10,000 rpm.

it's all speculation. We have no idea what actually failed or why, or if it was related to the over rev at all. I wouldn't hold my breath for a detailed teardown.

[socal330i]

for those wondering, a single valve dropped on cylinder 5, I was shocked that the car took so much spirited driving and didnt blow but decided to blow upon startup?

[socal330i]

Originally Posted by hassmaschine

it's all speculation. We have no idea what actually failed or why, or if it was related to the over rev at all. I wouldn't hold my breath for a detailed teardown.

detailed teardown: rats got into my car and chewed a bunch of stuff. I drove the car to run a quick errand and it was fine. next time I drove my car (a mere 30 mins later) it started up extremely rough, had an erratic idle, sounded like a 1960's camaro and had a pinging that went up with rpm. firs the mechanic after 3 days of diagnosis found a massive short in the ecu (weird). after the 2 weeks it got to get that fixed they found the car still wasn't running correctly. (note, the ecu, may have blown a while ago as I had battery drain issues) anyways they did a compression and leak-down test and found the dropped valve in cylinder 5, he recommended a used engine over a top end rebuild as if there any issues besides the valve it would probably end up being more than just swapping in the used motor. also hass, no offense but after revving a car to 10k I think its a fair assumption that that's what caused the engine to fail.