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11-29-2025 #1
RinerAutomotive's SN95 Autocross Mustang
Hi Pro-Touring,
My name is Stephen and I've been a member since 2020. I enjoy reading about everyone's builds and figured it was time I share my build on this forum. This first post will just be an introduction. I'll do some dedicated posts later to fill in more details.
The car is a 1994 Ford Mustang specifically built for autocross. I mainly compete in the SCCA Classic American Muscle Traditional (CAM-T) class. I've also made several trips to UMI Motorsports Park running in either the mid or late class depending on the event.
Some of you may already know my car or have seen some of my YouTube videos. I started a YouTube channel (RinerAutomotive) in 2021 that covers many aspects of my build and autocross adventures.
Some details about me, I am a mechanical engineer and have been autocrossing since 2012 with this car. I work in the mining industry, testing off highway haul trucks. So, most car maintenance and race setup I've had to learn.
Current car setup at this time:
Custom short long arm (SLA) front suspension designed and built by myself
Maximum motorsports torque arm/panhard bar rear suspension
Engine is still a small block ford, 306ci, with aftermarket heads, cam, intake, all controlled by a custom junkyard sourced ECU distributor-less ignition setup
Homebuilt aero and vinyl wrap
Probably see a theme that I'm big into DIY. Which is one of them things I like about this forum as well. Thanks for checking out my build thread. I'll go into more detailed posts in this thread to get caught up on the car build. But a project car is never done right? Especially a race car as there is always the pursuit for more speed. This will not be how to build a show car thread. But I have taken the car to some shows a won a judge's pick at Ponies in the Smokies.
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11-29-2025 #2
Registered User
- Join Date
- Jul 2006
- Location
- Chesapeake, VA
- Posts
- 675
Nice car! I went looking for your YouTube channel, lots of content there.
Cars are meant to be driven.
John B
11-30-2025 #3Purchasing a Good Base
Before getting into updates on this car, let's look back to why this car.
My very first car was a 4cyl automatic fox body. Great learner car but slower than molasses. When I turned 18 I bought a 1991 Mustang GT with a 5.0 5-speed. I loved that car. It was lowered on springs and I built a 347 SBF for it. In late 2011 I tried my first autocross with that car. It was fun but it didn't handle too well and was overpowered. Also at the time I was interested in getting into W2W racing. I decided buying a new car to build as a dedicated racecar was the correct option.
I loved fox bodies, but I couldn't bring myself to cut up mine or any fox body to make into a racecar. At the time SN95 were cheap and plentiful for sale or in the junkyard. Plus they are better base to start with in suspension, brakes, and chassis. I found a 1994 V6 Base that had a seized engine for $500, aka the perfect candidate. Then found someone on CL parting out SN95 GT, so I bought the engine and everything I needed to swap in.
By the start of 2012 I had a running Mustang 5.0 with very soft suspension. I convinced my dad to codrive autocross with me. That started it all.
For this car I was going to follow a completely different philosophy from my fox body...don't touch the engine and put all the work into the suspension. Each year I slowly upgraded the car moving from stock class to E-street prepared to C-prepared running on Hoosiers.
11-30-2025 #4
01-04-2026 #5Move to CAM Class
One of the limitations of the SCCA ruleset is that some simple modifications bump you up classes. Without building to the max of the rules or having the "right" car it's difficult to be competitive. In the early days I wasn't competitive and didn't think the Mustang could be competitive. Then came the creation of Classic American Muscle (CAM) class. However, the rules clearly stated (at that time) that cars must be licensed and insured. My car was not and could not be in Virginia due to emissions and airbag removal. Until 2021 when the car became 25 years old and eligible for antique plates.
Off came the Hoosiers and on went some 200 TW tires. This also was the same time I launched my YouTube channel (@RinerAutomotive) where I have documented all the modifications and racing I have done with the car since 2021.
Last picture before the car went in for a major revamp:
With the move to CAM I decided to do a large transformation of the car. I built a plywood front splitter, boxed in the radiator, vented hood, fixed the front roll center, reinstalled the interior (luckily I'm a hoarder), and vinyl wrapped the car.
While the car still looks the same now as it did in 2021. Up close the vinyl wrap is starting to look tired from all of the cone hits.
01-04-2026 #6



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