S550 GT350R Race Car Build Build Thread Profile - S550 Mustangs

[steveespo]

Upgrading to the newly available SPL rear toe links. Less weight, but more importantly, way easier to adjust than the alternatives:
View attachment 13986

Constantly costing me $$$$$$

 

[Black Boss]

Back at Mid Ohio. Track is starting to get faster. Pro course today, Club course tomorrow.

Managed to pick up a trophy:

 

[Black Boss]

Had some really good racing at Gingerman last weekend. Very closely matched with an M3 that out qualified me twice, but managed to pass. Improved overall positions over the weekend as the track got slower. Unfortunately Reverse gear failed, so pulled the Transmission today and dropped off at Liberty's:

 

[Dave Bowman]

Couldn’t you have done this with a base mustang instead? You would just need a crate illuminator engine. I think it would have saved money and a GT350R.

 

[67GTA]

Couldn’t you have done this with a base mustang instead? You would just need a crate illuminator engine. I think it would have saved money and a GT350R.

The backstory is long and starts on page 1 of 46 - it’s definitely worth the read so I won’t spoil it other than saying it’s not what you think.

 

[Black Boss]

Here's a bit of the history before page 1 of this thread:

Where's Wally

That's impressive that you "only" need -2* in the front with race rubber on the 350R. The rear camber must help quite a bit!Yea, Also spring compression increases camber with this suspension -- not sure that was the case with the S197?

trackmustangsonline.com

 

[ArizonaBOSS]

Nice work at Gingerman. Ran against Vanucci at COTA a couple years ago, dude is quick. Almost 6 seconds margin of victory for your final race--good stuff!

 

[Black Boss]

Picked up the Transmission from Liberty's. They did a great job with fast turnaround.

Turns out the output shaft nut had worked loose, allowing reverse gear to shift (pun intended) rearwards on the shaft. Symptom was reverse lockout but this failure also caused thrust damage on the 3rd and 4th driven gear, Blocker rings, Cluster bearings along with the Reverse gear and Synchro.

Parts bill was over $1,600, but they did a refresh including Bronze Fork pads.

Apparently this is not the first 3160 failure due to the output shaft nut backing off. So beware if you're running a 3160. I've now paint marked the nut and will check 2x per season (even although it requires Driveshaft removal).

 

[honeybadger]

Picked up the Transmission from Liberty's. They did a great job with fast turnaround.

Turns out the output shaft nut had worked loose, allowing reverse gear to shift (pun intended) rearwards on the shaft. Symptom was reverse lockout but this failure also caused thrust damage on the 3rd and 4th driven gear, Blocker rings, Cluster bearings along with the Reverse gear and Synchro.

Parts bill was over $1,600, but they did a refresh including Bronze Fork pads.

Apparently this is not the first 3160 failure due to the output shaft nut backing off. So beware if you're running a 3160. I've now paint marked the nut and will check 2x per season (even although it requires Driveshaft removal).

View attachment 18216

Thanks for sharing, Nick. Did you happen to ask them about any trans upgrades? Dog-legs or gear upgrades?

 

[Black Boss]

Thanks for sharing, Nick. Did you happen to ask them about any trans upgrades? Dog-legs or gear upgrades?

They installed Bronze Fork Pads, Shot Peened the Sync teeth and performed surface enhancement to reduce friction on the Hubs & Sliders.

 

[byronj]

Couldn’t you have done this with a base mustang instead? You would just need a crate illuminator engine. I think it would have saved money and a GT350R.

There is a lot of history on this car and why it was built the way it is. Grab a beer and read the entire build plus the “Where Wally“ thread.

 

[Jet One]

Nick, is there a torque value on the output shaft nut or is it a torqued to a certain tolerance that effects something within the transmission?

 

[Black Boss]

Nick, is there a torque value on the output shaft nut or is it a torqued to a certain tolerance that effects something within the transmission?

Torque spec is 105 ftlbs

 

[Black Boss]

Got the Transmission back in. Just need to install the Driveshaft, Cold end exhaust and Rear Diffuser and we’ll be ready to go!

 

[Black Boss]

Mk II

About 170 lbs lighter at 3,140 without driver and gas. ST2 legal:

 

[Black Boss]

 

[Black Boss]

 

[VoodooBoss]

Looking good. Which one is faster?

 

[5.2 liters of democracy]

I could stare at this thing all day.

 

[gtorpedo]

Looks incredible! Where did the 170lbs come from? Carbon roof + hood + doors? That's gotta be something you can feel!