I had a modified MM 6pt in my '89 convertible. (It's been sitting in my garage for a while, as I pulled it out to do some interior refurb.) As castine917 said, based on the jacking the car up with and without the rollbar installed, it definitely improves chassis stiffness - and that was just with it bolted in.
Ancient picture during initial install:
We decided to just weld the door bars in (instead of leaving them as swing-out), and also added a diagonal in the main hoop. Welding the door bars in was a mistake - just made it a pain in the ass to climb in and out of the car for normal, around town driving.
The guy doing the install welded some 1x2" box sections below the floor where the main hoop and door bars landed. You can see the 1x2" here between the MM full-length SFCs and the convertible rocker sill reinforcements:
I had a custom bar installed in my 86 'vert - bolt-in 4-point. The builder built raised reinforced box-mounts with captured nuts at each footing. Two cross bars and a harness bar. Huge improvement in chassis rigidity.
Thanks. Initially I wanted to keep the rear seat when the bar was removed (the cross bars are too intrusive even if one could argue it's safe for passengers). But the car and I have moved on from the need. And although the bar is a 10 minute, one-man job to remove (install a little longer due to bolt-hole alignment), it is now fully padded and covered with matching seat material. No desire or need to remove now; hence, no rear seat.
2020 MVP Track Time Schedule
Fellow Track Junkies and Racers:
MVP Track Time (www.MVPTrackTime.com) is excited to announce our 2020 track event schedule. Another fun year of exciting on-track action awaits. We have a host of exciting track events for 2020. I hope you’ll join us for the...
I am trying to figure out a strut tower brace for my fox but I don't think anything will fit with my Kenne Bell that has a bypass valve(which is part of the lack of room). Does anyone have one?
I am thinking about selling the blower to get a vortech so I can fit the STB.
Thanks to Mustang5L5 who posted a low mileage SPR ZK rack the other day, I embarked on the SN rack swap in my car.
I installed a low mileage 50k SPR ZK rack, reused my also new Solid Rack bushings, and bought the Maximum Motorsports swap shaft.
Prior to this, I was on the stock 4 cyl rack...
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