Just Blew My Motor... Need Advice

[DeTh]

Alright guys! I got her back. We had a few hiccups along the way

The car was transported from the original shop to Miami Engines on 2/15. The original shop put a massive scratch in my quarter panel (unintentionally) and took $1500 off the labor that I owed them. I have a connect at a phenomenal paint shop here in Miami and was quoted way under $1500, so I'm not that mad.

It got to Miami Engines and was missing quite a few assorted bolts/parts. They were able to make do with items they had on hand and the things I was able to bring them. They decided to pull the motor to do the turbos, so it came out again on 2/21. It was reinstalled on 2/23 and had a few delays as we were moving parts from one shop to the other, and when we realized the valve cover was cracked and needed to be replaced.

On 2/26, the car started for the first time. It had a super rough idle, and was struggling to not stall. Miami Engines read multiple codes, and linked it to a bad valvetronic servomotor.

This is when I learned from Miami Engines that the motor that is in the car does not indeed have Carbahn valve springs and retainers. Although I don't need them based on my power goals, it's still something I paid for that I did not receive. The original shop is working with the engine builder to determine where the disconnect in communication was. They did confirm that the pistons were upgraded (I knew this anyways because of the pictures I had of it being built) so I am not overly concerned.

We replaced the valvetronic servomotor and the car ran beautifully. I picked it up on 2/28, and have driven it about 200 miles so far. No issues aside from the first 10 miles of leaving the shop, the car read minimum engine oil level. Both Miami Engines and the original shop said that it was normal since the engine had been bone dry before. I added a quart and have had no oil consumption issues after checking quite frequently.

I plan to install the LPFP and Flex Fuel sensor this weekend. I will do some extra driving to get the break-in done at a bit of an accelerated process, so I hope to start tuning in the middle of next week. The turbos sound absolutely insane! If it wasnt a head turner before, it definitely is now. Ready to get this thing ripping! I'll keep this updated with the tuning process, and dragy times as we start putting power down!

[DeTh]

I've also updated the original post with pricing. Feel free to ask questions

[b_w.]

Originally Posted by DeTh

I've also updated the original post with pricing. Feel free to ask questions

glad you are rolling again but that's a pricey repair!

[SilleM3]

Congrats to get your car back and running! 😀

[NSX2M4]

Glad you got it back so quickly. I was hoping not to read another post about how the engine builder slipped on a banana peel...
Classic tuner shop rhetoric

[DeTh]

Late night (or early morning) update!

I installed the LPFP. Wasn't super hard, didn't have the special tool so used a hammer and a screwdriver. Was just below 3/4 tank so nothing spilled.

On a separate note, I was driving for about 45 minutes doing some break in miles when the car had a hard stutter, drivetrain malfunction, and injection shut off in cyl 3.

I fortunately had an extra coil pack, I pulled over, swapped that, unplugged and replugged in the injector, and it temporarily solved my issue. I will investigate more tomorrow. It may be coil pack related. I know the spark plugs are brand new, and the injectors are supposed to be brand new as well.

[wheela]

Originally Posted by DeTh

Late night (or early morning) update!

I installed the LPFP. Wasn't super hard, didn't have the special tool so used a hammer and a screwdriver. Was just below 3/4 tank so nothing spilled.

On a separate note, I was driving for about 45 minutes doing some break in miles when the car had a hard stutter, drivetrain malfunction, and injection shut off in cyl 3.

I fortunately had an extra coil pack, I pulled over, swapped that, unplugged and replugged in the injector, and it temporarily solved my issue. I will investigate more tomorrow. It may be coil pack related. I know the spark plugs are brand new, and the injectors are supposed to be brand new as well.

Glad you're driving her again! Check that plug 3 is tight. I had an issue where a cylinder started misfiring, the coil had pushed loose. That plug was a little loose, I think some pressure leaked past - just enough to pop the coil loose. May not be your problem, but easy enough to rule out.

[Wanted_M]

Which pump did you go with? I recently bought the PFS.

[DeTh]

Originally Posted by wheela

Glad you're driving her again! Check that plug 3 is tight. I had an issue where a cylinder started misfiring, the coil had pushed loose. That plug was a little loose, I think some pressure leaked past - just enough to pop the coil loose. May not be your problem, but easy enough to rule out.

Confirmed with Miami Engines tech that worked on my car (who also has built motor m4) that they were all torqued to spec. Going to order all new coils and go from there.

Originally Posted by Wanted_M

Which pump did you go with? I recently bought the PFS.

Precision Raceworks Stage 3 Brushless.
It was a pretty easy install. A little difficult to get it back into the tank but just required some finesse!

Word of advice to anyone doing install, be below 3/4-2/3 of a tank and open your gas cap to release tank pressure. Should be smooth sailing after that.

[DeTh]

Flex Fuel sensor installed! I'm going to tidy it up tomorrow. Base map will be here next week

[n8dgr84]

Originally Posted by DeTh

Flex Fuel sensor installed! I'm going to tidy it up tomorrow. Base map will be here next week

Is this the new version that gets run to the passenger footwell?
How was the install?

[DeTh]

Originally Posted by n8dgr84

Is this the new version that gets run to the passenger footwell?
How was the install?

I had bought that one originally, but when I realized there was no DIY instructions and that there was a lot of wiring to do, I bought one that just sits on the LPFP.
I don't really plan to go to PI so this is my solution for right now.

Just got my base map today!

[DeTh]

Hey everybody,
Sorry for the delay, I've been super busy recently and haven't gotten around to typing everything out.

TUNING:
I am currently tuning with RK. It's been an interesting process for sure and I'm not sure if I would recommend him or not.
I've had to wait a long time in between revisions (sometimes up to a week and a half). When I call the shop phone its a 50/50 if I'm able to speak to him or not. I am almost two months in and have only had 7 revisions.

I have currently decided to stay with DI. As mentioned previously, I have LPFP and EU5's, stock HPFP. We are tuning for flex fuel but I was told I would have the most power around E50.
Peak psi so far has been 30.2 PSI, which I estimate to be around 700whp.
I started getting some stuttering issues above 6k RPM, which I havent gotten a specific answer as to what they were from yet. On my current revision the boost was turned down. We will see how this is handled from here.


THE MOTOR
I was finally able to retrieve the block from the original shop (not Miami Engines). They still have my head somewhere and I am trying to get it back.
It turns out, the motor had the crankhub done by the previous owner. So we know it was not a spun hub. The timing chain was also intact.
Cylinder 2 did decide to create some malice in the combustion palace. It split in half, and decided to explore the outside world by putting two holes in my block. I'm starting to think this was more tune-related, but until I get their injectors back to flow test them, there isn't a way to tell. I plan to make a table out of the block.

Also for those of you reading this, if anyone is interested in another built motor or transmission (or some other misc parts), please see this link:
https://f80.bimmerpost.com/forums/sh....php?t=2102093
My friends M3 was declared a total loss, and heres a great opportunity for one of you guys to get a built motor too!