GT350 Build - Autocross Time is Great but Track Time is Better

WItoTX · Mar 11, 2025

honeybadger said:
definitely don't want to use the Full Tilt, BMR or Steeda camber arms. Those threaded bits are major weaknesses. I went for a wild ride back in 2020 with an FTBR arm that broke.

I now use an SPC arm. I've talked to Turner at SPL extensively about their rear camber arm and he assured me that it won't break. He over spec'd it significantly based on my experience. I'd trust their arm if I needed a new set.

The AAD arm looks pretty decent too. Just don't use FTBR, Steeda or BMR

When it failed, did it take out anything else? How did the failure look, like wheel cambered way in? With the fuel line and a bunch of other stuff up there, I could see that being a pricy/time consuming failure.

This was a selling point on the AAD as well, I'm glad you brought this up.

mavisky · Mar 12, 2025

honeybadger said:
definitely don't want to use the Full Tilt, BMR or Steeda camber arms. Those threaded bits are major weaknesses. I went for a wild ride back in 2020 with an FTBR arm that broke.

I now use an SPC arm. I've talked to Turner at SPL extensively about their rear camber arm and he assured me that it won't break. He over spec'd it significantly based on my experience. I'd trust their arm if I needed a new set.

The AAD arm looks pretty decent too. Just don't use FTBR, Steeda or BMR

I went with the SPC arm as well, but my buddy's shop despises the initial alignment phase using their little hex inserts as it's a bit of trial and error to get your car into the "range" of where you can use the eccentric bolts to adjust them correctly. Once done though their fully cast construction eliminates this sort of failure entirely.

webspoke · Mar 12, 2025

I wish there was a full spherical version of the SPC arm. Even without the external adjustment, maybe just some graduated lockout plates for the inner slot. On my heavy street weight car, I worry about breakage from stress .

mavisky · Mar 12, 2025

webspoke said:
I wish there was a full spherical version of the SPC arm. Even without the external adjustment, maybe just some graduated lockout plates for the inner slot. On my heavy street weight car, I worry about breakage from stress .

With a little ingenuity I would imagine you could come up with a replacement for the hex units utilizing some sort of more solid solution.

honeybadger · Mar 12, 2025

webspoke said:
I wish there was a full spherical version of the SPC arm. Even without the external adjustment, maybe just some graduated lockout plates for the inner slot. On my heavy street weight car, I worry about breakage from stress .

I've thought about this. I agree. I don't really need the finite rotation that the concentric bolt provides. so I've been wondering about machining some lock out plates

honeybadger · Mar 12, 2025

WItoTX said:
When it failed, did it take out anything else? How did the failure look, like wheel cambered way in? With the fuel line and a bunch of other stuff up there, I could see that being a pricy/time consuming failure.

This was a selling point on the AAD as well, I'm glad you brought this up.

it was a pretty wild ride

No major damage outside of scratching the shock mount and the inside edge of the wheel

honeybadger · Mar 12, 2025

CobaltFilly said:
When you run out of things to do on your GT350 (funny like that will ever happen) I gotta take some track car building masterclasses in person from you. Your car is my dream with my own, only using the 6 cylinder powerplant and a supercharger paired with the stock 6r80 and a HTG Tuning sequential shifter. I hope to see you in person sometime.

always happy to help share info and answer questions. just ping me whenever. and if I don't reply, its because I read it at a bad time (like when I first wake up or when someone says my name in a meeting) and then got distracted and forget to reply. so just ping me again

icecreamtruckz · Mar 12, 2025

Interesting read. I love living on the beach, but man I wish I had a garage to park the car in and work on it.

WItoTX · Apr 14, 2025

It took me a week to get back to it, but figured the car deserves some good action shots. Long story short, CotA should be on everyone's bucket list. From CotA two weekends ago....Here we go!

Day 1, we started in the wet. I couldn't ask for a better way to start at CotA.

In this photo, you see the ass end hanging out. That is because I closed hard on the Porsche in the photo, and was about to take my off ramp to the right. My instructor was impressed with my evasive maneuver, which helped to get me bumped up run groups pretty much immediately.

Day 2:

All said and done, I am absolutely stunned by the braking capability of my car. Through the S-es, I could out manuever any of the Porsches on the track, including a GT2RS. However, the second we hit the straight, they were gone!

I also had a nearly major off:

Here is my best lap of the weekend. I managed a 2.28, before I was completely spent at noon on Sunday. I need to get my diet and sleep figured out, because burning out so early on Sunday sucks, and it seems to be a consistent theme no matter the event. Especially at a fast track like CotA.

honeybadger · Apr 14, 2025

WItoTX said:
It took me a week to get back to it, but figured the car deserves some good action shots. Long story short, CotA should be on everyone's bucket list. From CotA two weekends ago....Here we go!

Day 1, we started in the wet. I couldn't ask for a better way to start at CotA.

In this photo, you see the ass end hanging out. That is because I closed hard on the Porsche in the photo, and was about to take my off ramp to the right. My instructor was impressed with my evasive maneuver, which helped to get me bumped up run groups pretty much immediately.

Day 2:

All said and done, I am absolutely stunned by the braking capability of my car. Through the S-es, I could out manuever any of the Porsches on the track, including a GT2RS. However, the second we hit the straight, they were gone!

I also had a nearly major off:

Here is my best lap of the weekend. I managed a 2.28, before I was completely spent at noon on Sunday. I need to get my diet and sleep figured out, because burning out so early on Sunday sucks, and it seems to be a consistent theme no matter the event. Especially at a fast track like CotA.

I bet that Turn 9 drift woke you right up! haha. Car looks really hooked up. Balance looks great! and 2:28 for a first run at COTA is SOLID!

Was a pleasure meeting you and the rest of the crew! Hopefully see you out there again this year!

WItoTX · Apr 14, 2025

honeybadger said:
I bet that Turn 9 drift woke you right up! haha. Car looks really hooked up. Balance looks great! and 2:28 for a first run at COTA is SOLID!

Was a pleasure meeting you and the rest of the crew! Hopefully see you out there again this year!

Other than my turn 9 stint where I was over agressive on the throttle and just over-corrected, the car feels fantastic, and the esses through Turn 11 is an awesome series of corner.

I was surprised they didn't flag me. I drove past that flag stand and the guy was tucked way down.

Great meeting you as well. We will be in touch...I've started researching the CPC conversion and what it would actually cost me if I didn't have a ruined block in the first place. And I want to make it back for Edge Addicts July event. CotA is a special place for sure.