93 Mustang

Started by Rob Tarrien, Jan 25, 2026, 12:43 PM

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Rob Tarrien

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State: MI
City: Howell
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I own this car since new. Was my daily for the first year and then the transformation started. I ordered this as a GT because the dealer weren't allowing Ford A plan pricing on the Cobra. The only thing I liked about the Cobra was the ground effects over the GT. I had a buddy that work at a Ford dealership and I ordered all the original Cobra ground effects for $1800. At the time Ford had released the Cobra R so I purchased the Cobra R double adjustable Koni's and added matching springs and swaybars. I added Baer Racings first brake kit which was C4 Corvette parts. I purchased a set of wheels from Baer in 17x9.




Rob Tarrien

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Motor started out stock for about 30k miles in the first year as I was driving it back and forth from KY to MI for work. I then installed 1963 289 close chambered heads on it with a Ford E cam. The heads bumped up the compression ratio to 10.5 to 1. Ran that for a few years and then finally built 331 stroker with AFR 185 heads and a Comp cam. Had a custom tune by Jerry Wroblewski. Jerry was still a Ford employee at the time, he later on became the founder of SCT. Car dyno'd 380HP/380 TQ at the wheels.










Rob Tarrien

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Started working with Bruce Griggs of Griggs Racing back in 1997. I started with front and rear coilover kits, front K member and control arms, rear torque arm and panhard bar. What a transformation in handling. Since then I have installed Bruce's watts link and upgraded the front to SLA with Griggs spindles and adjustable front away bar.






Rob Tarrien

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In 2016 I was trying to understand my suspension better and how to get my car handling better in autocross. I purchased Performance Trends suspension software and I entered a drawing for a suspension workshop. I ended up winning and got to attend Ron's 7 Secrets of Suspension Mapping, Set-ups & Track Tuning Workshop. I ended up attending Ron's two other workshops, 2017 7 Secrets of Advanced Suspension Tuning and 2018 7 Secrets of Total Car Performance. After the 2016 workshop I measured up my car and had Ron do a full front and rear work up.




Rob Tarrien

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Based on some changes to car the lower I needed to raise the trans tunnel. Not something I'd want to do again.




Ron Sutton

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IIRC, we changed the geometry,  suspension set up & strategy, but not many parts.

Did we go with a bigger front sway bar?
I'm a veteran racer & race car designer committed to staying on the leading edge of racing technology, for one reason, to win. Everything else is BS. I'm only semi-retired because I still love helping build bad ass race cars.

While engineering, geometry, trigonometry, physics & more affect everything in race cars, I do my best to make the complicated easier to understand. One of my racing friends said, "Ron is a race car designer that did not go to engineering school, so he speaks car guy."