Yes, I agree the new N74 engine is a LOT more efficient than the older M73. I was just being dramatic for the video.. :) Thanks for watching -- Enjoy the Drive! -- Mo

Hope you enjoyed! Another update will be coming soon 🦾

Hi! Thanks for all of the comments, and your kind words. First, yes, the N73 was definitely discussed. The client REALLY wanted to use the N74, so that is why we went in that direction. (we discussed on how much more complicated this swap would be - but he wants what he wants!) That is very cool that you are working on N73 swaps -- Would love to see your progress as well! What oil pump did you use? Ours will be an external unit. We are using the 8-speed auto box, but it will be driven by an external controller, so it can handle the clients power goals, we can tune the shifts, and the client will have paddle shifters on the column. We do not plan on using the stock DME, but a standalone system that we can program. Please stay tuned for more updates soon -- Enjoy the Drive -- Mo.

@@offcamberautosportshop I now better understand the engine choice as it is a customer will. For sure the engine will fit under the hood, then the challenge will be about building suitable attachments with absorbers and isolate the engine bay from the turbos heat. Direction column and wheels rack will be another challenge, I am sure you will find appropriate solutions. Oil pump: We kept the genuine twin stage pumps gears, a specific casing has been machined to host the gears, keeping the stock chain drive. The pumps internal pressure regulator between the two stages has been dropped. The thermostat and pressure regulator is then bolted onto a custom interface replacing the water-cooled alternator. ECU: The N74 is "somewhat" easier to handle than the N73 as the Valvetronic is not there…but the turbos must be managed. There are some ways to fit two aftermarket ECU's working together managing "two 6 cylinders inline engines", this solution is certainly more affordable than getting an ECU able to manage a V12 fitted with double VANOS, direct injection and turbos. On the N73 I have the "luck" to have some options to get the genuine ECU's (5 units!) working on the engine after some prog work. Gearbox: Good option to get a gearbox coming with its standalone management, however I doubt that no interfacing is needed between the gearbox and the ECU's. On my side I didn't consider sequential gearbox as I do not appreciate them, thus I decided to go through a complete gearbox casing redesign, incorporating a perfectly matching clutch bell to the engine interface together with an internal oil pump fitted there to cool the gearbox through an external radiator. Hope to see updates soon, if I have time I'll try to post some vids from our work.

@@laurentvelati7565 I LOVE discussions like this, thanks! Wow, 5 DMEs! Totally crazy. I am still looking into options on the DME side. My goal is to have 1 standalone that will control all key engine functions. Yes, you are correct the "standalone" trans controller will have communication to the main DME. We looked at several options on the transmission, and for the client's needs the 8 speed with paddle shifters was the best one. I do love your idea of a custom case with additional cooling. Good luck with your project -- Would love to see what you guys are doing at some point! Enjoy the drive, Mo.

Troy, we hope you liked the video and project progress! 😃

@@offcamberautosportshop Loved it !

We talked about that, but the client really wanted a twin turbo V12...

Hi Jesse - All great questions. The system will be a FULL dry sump setup -- Integrating the motor mounts into the pan might have been a good idea, but there are a lot of other factors involved -- Eg. We will not be using the original engine carrier, but will be fabbing up a custom one, so we will have a lot more flexibility. (& initial design work) This engine has a lot of plumbing, so we want to make it easy to remove / install the engine as possible, hence notching the frame rails a bit for extra clearance. We are building a custom engine table to make removing / servicing of this engine simple. Ah the steering is an excellent point! No, the factory gear box will not work, neither will the factory steering shaft. At this point we are still researching options, but I am pretty confident the final solution will not be hydraulic, but electric. keep watching as we are hot and heavy in this project, and look forward to posting more frequent updates -- Enjoy the Drive -- Mo

​@@offcamberautosportshop Make sure you consider the OEM steering geometry & stroke/ ratio specifications of the E31, the OEM steering box has a VERY broad stroke & a relatively aggressive ratio. the majority of swaps Ive seen on the E31 have considerable compromise in this area of the swap & the user experience suffers greatly. If you're plans are to convert to a rack & pinion type steering system, I suggest you look at the 80's/ 90's Cadillac steering racks (although they are hydraulic, they have good stroke range, excellent ratios & they are CHEAP.) you can get one delivered for sub-$200USD, then play with de-powering, adapting a Prius steering column driver & a steering quicker, if needed. PS: convert to a single battery & put the oil pot in the rear, with a ball valve, for easy oil changes. Another part to look at is the EARLY generation Tesla E-brake booster, they are also cheap, plentiful & internally managed, so they are great for the E31 conversion (its already been well documented)

@@jesseframe5134 Thanks for the information! You are correct, this is not going to be a simple quandary to resolve! We will not allow the client to suffer with sub-par steering response, so we are looking into several options. The other factor is to fully dry fit the engine into the bay, so we will be able to see how much, and where we have room. More to come - Love the input, please keep it coming!

@@offcamberautosportshop Is the goal to run a factory ECU for the engine? What transmission & differential will be used? It’s difficult to give advice without knowing the overall application of the vehicle or how far from the factory formula the client is willing to stray. Municipal regulation can also create difficulties on resto-mod projects, due to vehicle inspections. I suggest you discuss these matters with your client & give them the option to register the vehicle out of state.

@@jesseframe5134 In terms of engine control, I would love to be able to use the factory DME from the N74 -- the issue that we are potentially facing is the programming that we will need to do. We are also looking at stand alone options such as a Cosworth, and a few others which will give us much more control over the engine. In terms of transmission, we have decided on the stout GA8HP with an aftermarket control unit. (again allowing for us to fine tune the trans shift points, etc.) This will be a street / show car, so the client has been very open to our ideas. Thanks again for your intelligent conversation -- I appreciate it!

You've gotta break a few eggs to make an omelet 😛

@offcamberautosportshop of course! This is a phenomenal build in which I will continue to follow. Whats going to happen with the m73 engine?

@@davidt.6415 Thank you we hope you're enjoying the series thus far!🙏 We're glad you asked...we have some plans for the m73 engine!👀