AWD 2017 Mustang GT Conversion

[Cobra Jet]

You figured it out already as I see in your above follow ups, but anytime you do major engine or trans work on an S550, you have to do the crank relearn procedure.

This is a great tech thread - one of my favs on M6G and much kudos to you and the venture. It’s definitley pulled a lot of us in for the ride!

Will we see an AWD smoky burnout in an upcoming episode?

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Sub’d

 

[xr4x4ti]

Episode 13 is up.



The driveshaft turned out pretty well and I am happy with the adapter.

Thanks!
Tim

 

[xr4x4ti]

OK, this won't matter until I get to the front diff in a few months, but I have been thinking about final drive gear ratios.

I am using the TR6060 with the following gear ratios:

2.97

2.10

1.46

1.00

0.74

0.50

My car is a PP1, so it has the 3.73 Torsen rear diff.

I did some quick math and calculated total gear ratio for each gear:

To get the same total first gear ratio, I would need to go to 4.56 diff gears.

The front diff I plan on running already has 4:10 gears in it and I was planning on swapping them to 3.73's (which I already have). But, maybe it makes more sense to swap the rear to 4.10 (4.09)?

My Merkur has the 2.66 first gear T56 and it originally had 4.10 gears and it was a blast on the street. I eventually switched to 3.73's front and back so that I didn't have to shift into 5th in the 1/4 mile. But the tires are much smaller in diameter on the Merkur. The Mustang is currently running 295/35R19 tires.

	295/35R19	295/35R19	305/30/19	305/30/19
rev/mil	767	767	793	793
Redline	7500	7500	7500	7500
gear	3.73	4.1	3.73	4.1
axle rpm	2010.7	1829.3	2010.7	1829.3
4th mph	157.3	143.1	152.1	138.4

With some more math, it would suggest that I can do 143 in the 1/4 with 4.10 gears and my existing tires. The Other logical tire size is a 305/30R19 which drops my max speed to 138, but if I rev it to 7800 I am back up to 143MPH, more then I will ever run. Technically, you can't go over 135mph without a roll bar. Long term goal is to kiss the 9's in street trim.


I plan to boost the car after the AWD is fully debugged. I shouldn't have a problem putting the power to the ground in street trim. I know most boosted people lower the gear ratio to try to control the traction on the street, but I shouldn't need to. The Merkur proved that to me.

Thoughts?
Tim

 

[shogun32]

The front diff I plan on running already has 4:10 gears in it and I was planning on swapping them to 3.73's (which I already have). But, maybe it makes more sense to swap the rear to 4.10 (4.09)?

in 2WD motorcycles it's been found to overdrive the front wheel a little bit (I think <5%) for best stability. Granted bike != car but don't you want to do something similar where the fronts are rotating slightly faster than the rears?

 

[xr4x4ti]

Episode 14 is out. Things really started to come together.



Thanks,
Tim

 

[xr4x4ti]

Episode 15 is up with the car driving!



Thanks,
Tim

 

[xr4x4ti]

I am mostly working on the front spindles right now. But, I had to put all of the front stock 2wd parts on the car this fall to do my test drive I spoke about in the last video. In the process of taking all of that off and putting on the AWD parts I already have done, I decided to make video covering the motor mounts and a bit of the front Diff.

Enjoy.

 

[2morrow]

Pretty impressive engineering and execution on your part!

What is your target weight when completed?

What is your target power output?

 

[xr4x4ti]

Pretty impressive engineering and execution on your part!

What is your target weight when completed?

What is your target power output?

I am hoping to add less then 250 lbs to the car, including the weight penalty of the TR6060 and steel scatter shield. The transmission and scatter add about 50-75 lbs all by themselves and would be the same if it was still 2wd with Tremec conversion. So that leaves 150-200 lbs for everything else in the front of the car. Any power adders will be above that.

My goal is 700 AWHP.

Tim

 

[xr4x4ti]

Some more progress, this time on the front spindles. Machining of the OEM MR spindles is complete. I should be able to weld them up this weekend.

 

[2morrow]

Awesomeness!

 

[2017GBGTPP]

I just read through this whole thread and watched all your videos, and this is awesome. I'm excited to see how this all turns out.

FYI all, episode 17 was just put up yesterday, the spindles are done!

 

[xr4x4ti]

Yup, Ep 17 is up. Huge progress!

 

[compprep]

Check this out!!!!

World's First AWD-Converted S550 Mustang GT Is an All-American GT-R (msn.com)

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