The 15 Y/O Turbo M42 Build Thread (Now Holley EFI Terminator X Controlled)

[zwill23]

I really think 300whp is the perfect amount for this chassis, with the right setup everything is well balanced and it's not a burnout machine. I've opted to not push the pisseyes as well and I think it's the only reason the engine is still together 30k miles later. M20 but same philosophy.

[econti]

17.4 pisseyes

Barely even breathing. Nice result

[Northern]

I would've shit a brick at the sight of that plug

[Dj Buttchug]

Greasy torque curve. How many pisseye?

17.4 pisseyes

[econti]

Greasy torque curve. How many pisseye?

[Dj Buttchug]

Turned out well overall. I was very conservative on the redline just to be easier on my engine. There is more hp there if I add some more boost and pull a little more time. It was also a bit warmer, so on cooler days I anticipate a little better numbers. As of now I am content with the results and will likely leave it alone. The car is a blast to drive and I am still using a G240 trans. Reliability has always been a big concern so I think leaving the engine as it sits now is a good balance between power output and longevity. Yes the internals can take more. In my mind its not really worth it. The car rips as it is. We did do a final 4th gear pull and I managed to munch a spark plug. Melted a strap and blew the insulator off the electrode. Misfire started at around 4k on cylinder three. Here is the result.


Swapped out the whole set of plugs and luckily things are ok. I was worried the pieces of insulator could have damaged my engine but after a borescope was done no damage was found. Butt pucker scenario for sure.

Now time to focus on the M50 engine for my E34. If anyone has questions about Holley EFI or the process in doing this let me know. For now its time to put some miles on the car and enjoy it.

[Dj Buttchug]

[ccsdo5]

Hell yeah! still one of my favorite cars to this day looks and engine. Glad to see a 3 as the starting number haha!

[2mAn]

Dang, thats a legit number! Nice... Would love to see the graph

[Dj Buttchug]

Found a mobile dyno at a local speed shop and tossed the old girl on to see how things are. After some adjustments we ended up doing 6 pulls. 305WHP
276 TQ @ 17psi. Ill post up some run files here in a bit.

[varg]

It sure has been a long and slow progression. I rolled the ODO back when I built the new engine. Currently has 6400 miles on it HA.

Any news on your E34 wagon ? Im still staring down a bench full of engine parts awaiting assembly

None that is good. I still haven't installed the B58 ignition coils or replaced the rear bushings, the two things stopping me from turning the boost up past 15-17psi, after that I'll find out where stock fuel lines max out and if the oil burning issue is going to hold me back. Getting the engine rebuilt by (a shop) out of expediency instead of finding a new shop to hone it and reassembling it myself appears to have been a huge mistake. It also needs rear tires to be safe on a wet road, and needs the intermittent AC fault fixed (baffled by that at this point). Cursed project.

[Dj Buttchug]

Looking good. I kind of wish I had kept the single cutout, but I was and still am a sucker for the dual tip look. You really have the turbo M42 build with staying power, I didn't realize it had been 15 years.

It sure has been a long and slow progression. I rolled the ODO back when I built the new engine. Currently has 6400 miles on it HA.

Any news on your E34 wagon ? Im still staring down a bench full of engine parts awaiting assembly

[varg]

Looking good. I kind of wish I had kept the single cutout, but I was and still am a sucker for the dual tip look. You really have the turbo M42 build with staying power, I didn't realize it had been 15 years.

[Dj Buttchug]

New axle back exhaust fabricated. The muffler was the last part of the system that was still original from back when I started this thread.


Finished section. Forever representing the single cut out 318is rear valence.

Should last another 10 years.

[Dj Buttchug]

I just picked up some Wilwood's off marketplace that will fit with my euroweaves. I'm excited for the extra stopping power too.

Glad to see you back up and running! 300whp is the perfect amount in our chassis, I bet 17psi feels great.

I wasnt prepared for the insane amount of brake dust the brakes put off. Seriously turns my wheels black in a few miles HA

Heres a updated engine bay shot. I would estimate 80% done tuning with Terminator X ECU. The starts are dialed in. Cold, Hot, Mid temp, no matter what it starts like a stock car. Just this alone is seriously a huge milestone with this car. Years of battling Megasquirt and was never successful with getting the ASE and starting up to work correctly.


I will turn the boost back to 21psi soon but only after my custom set of Image wheels arrive. 7 inch wheels in the rear is not safe at all...