New Build Spec Out Help

[Slow and Slightly Angry]

I have been plotting and planning to build a coupe for a few years. Finally came to an agreement with the wife and I am on my way, or so I think.

I am going the route of a salvage donor car ('16 mustang gt with a roush supercharger).

I am trying to figure out the odds and ends that I NEED and some that are on the wishlist or on the "buy later cause its gonna be a while until we get there".

I am planning on pairing the donor rear end with the IRS kit.

My engine choice has left me with a few conundrums which include:
Will power steering fit?
Will air conditioning kit fit?
Since it is already tuned to the supercharger, will the ECU be able to work or will I have to buy the control pack and have it programmed?
Do I need the EFI harness? Should I just talk to Ron Francis instead?

Any help would be greatly appreciated.

Thanks!

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[edwardb]

Can respond a little since I've done a couple Coyotes including in a Gen 3 Coupe (build thread in sig line below) but the supercharger isn't anything I have experience with. It appears from looking at the Roush instructions (https://www.roushperformance.com/media/parts/manuals/422001-instructions.pdf) that the front drive modifications would not allow the commonly used KRC 66302125 power steering setup. The A/C pump however doesn't appear to be affected. So looks like A/C yes. Engine driven power steering no. You would maybe need to look at an electric setup. Either directly on the steering column or an electrically driven hydraulic pump. In general builders have not been successful using Mustang donor ECU's. Just too many dependencies that aren't used on these builds. I have no idea if the Ford Performance control pack could be adopted to the Roush supercharger. Maybe that's a question to ask Roush. I'm 99% certain you would not need the RF EFI harness. Other things to consider, based on my cursory review: (1) Height of the engine with the supercharger. Will it fit under the Coupe hood? It's pretty low. (2) Fitment of the intercooler. Going to be a busy place up front with the radiator, intercooler and A/C condenser. (3) The Roush instructions also show modifications to the stock Mustang fuel pump. But seems they're still using it. The crate motor Coyote with the Ford Performance control pack doesn't use this pump and returnless setup. Instead it's intended to use a full-time running pump with a regulator and return line. No idea how this would sort out. Good news is, assuming it's an acceptable ratio, the IRS diff and knuckles/hubs should work fine.

Roush is showing the Gen 2 Coyote with this supercharger to be in excess of 700 HP? Assume you know that's a whole bunch for one of these cars and will be challenging to hook up. Among other things. Good luck with whatever you do.

[Slow and Slightly Angry]

Thanks for the info Edward. A few months back I actually bookmarked your build page for reference during my build. That is one incredibly detailed thread. Not to discount the countless hours you put in elsewhere, but your interior looks fantastic.

Looks like it will be electronic PS but thankfully AC with the amount of heat that engine will put out. That is, of course, if I can get the condenser/rad/intercooler all fitted.

A gracious builder out of Canada, Ryan Valin, has a very similar engine setup in his Gen 3 coupe. He indicated the only dimensional challenge to the body is the intake needs repositioned into the fender (a whole other can of worms).

I actually have the Phase 1 Roush kit. It puts a little over 600 (I think they rate it at 627) to the flywheel. So somewhere in the mid to upper 500s. Still a lot for 2700lb or so. I will push the limit of tire/wheel width on the rears and maybe have flares fabricated to extend them even further. Hopefully, 11-12" rears will get me enough traction.

[edwardb]

Thanks. Nearly 200 miles on my Coupe now with our state finally letting us out of our houses. Just go back from another brief drive. Liking it more all the time. That's great you have someone else with a similar configuration to share from. Regarding the rear tires, check the Erik Treves build thread. He used 335's on his. They fit, but he did need to clearance the frame a bit. Whether 315 or 335's, that's a lot of meat. Going to be about what tires you pick versus going extreme on the size IMO.

[P100DHG]

I think it's going to stick out of the hood.

[Slow and Slightly Angry]

You may very well be correct. Since I don't have the kit or the experience, it will all be a quality learning experience. It is certainly something that I think about and is certainly possible. If that is the case, I may be selling a well priced supercharger kit.129561

[Chris @ Forma]

We are building a coupe for a client and the only supercharger that we found fit under the hood was the Edlebrock. All the others were just too tall and we were not crazy about cutting the hood.

[P100DHG]

You may very well be correct. Since I don't have the kit or the experience, it will all be a quality learning experience. It is certainly something that I think about and is certainly possible. If that is the case, I may be selling a well priced supercharger kit.129561

I'm confused, did you just drop that engine in that fast or that someone else's build?

[Slow and Slightly Angry]

Sorry for the confusion. That is another build, same engine same kit. So it's what mine should be looking like when I am to that stage. I was trying to show an example of the result.

[Chris @ Forma]

I'm not sure about the power steering pump with your supercharger. With the Edlebrock it was going to be exceedingly challenging. We are in the process of coming up with an electro-hydraulic solution. We are investigating a BMW/Mini Electric pump paired with a standard hydraulic rack. We're pretty sure this will work and we will post something about this in the coming weeks. Other Coyote builds we have used a front-loader and it has worked well. Just don't know if it will package with your supercharger.

[Slow and Slightly Angry]

Thanks Chris. I think I will not include PS in my build and worry about it after installing the engine. On a side note, I actually purchased a shifter relocator from you guys earlier this year!

[stack]

Going to need some custom brackets and fabrication to use the MT-82 transmission. Rear end is no issue at all. I would suggest using the control pack over the factory wiring and computer as it is just easier. Then get a tune after you are done. No idea if it will fit in the car with blower on there. You will need a custom made drive shaft as the MT-82 does not have a slip yoke. You can use the brakes in the rear and can possibly use them in the front with an adapter bracket. Know F5 was making one for gt350 brakes. Power steering does work with coyote however might not with the blower.

Nothing else on the donor car is usable

stack