Author Topic: chassis top rail has bowed outwards  (Read 180 times)

Offline longtimeracer

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  • Your Best Time: 6.7, 204 in TAD in 1996; 8.93, 147 in my FED
  • Your Engine: 359 inch SBC, Hilborn injected, on methanol
  • Your Track: Santa Pod, UK
  • Your Vehicle: My FED, Jurassic Parts 2
  • General Location: East of England
chassis top rail has bowed outwards
« on: November 13, 2020, 05:02:35 AM »
Got a bit of a conundrum with my FED, its a 150" mild steel chassis with an injected Chevy small block. The chassis is 5 years old, built to SFI 7.50. Only done 30 runs as I only do 3 meetings a year, its a hobby car, not ultra serious but I don't stint on what it needs. Its a regular low 9 second car but got it into the 8s in 2019. Taking the motor out, I noticed that the offside top chassis rail(that's the right-side from the drivers seat) is bowed out by about 3/4". At the front the motor mounts on saddle brackets held with Micalor hose type clips. I'm thinking that in a wheel stand the right side front motor mount slipped because of the weight of the motor and then pushed the chassis rail out? Also the torque reaction of the motor would tend to push the motor down and push against the right hand side chassis rail which might worsen the effect of a wheel stand. These are thoughts that I've had. Regarding saddle mounts, wouldn't these work better if dowelled? Of course I've got to get it fixed or may be front halved? I would be very interested in what you guys think, having a bit more experience than me, thanks.

Offline longtimeracer

  • Newbie
  • *
  • Posts: 4
    • View Profile
  • Your Best Time: 6.7, 204 in TAD in 1996; 8.93, 147 in my FED
  • Your Engine: 359 inch SBC, Hilborn injected, on methanol
  • Your Track: Santa Pod, UK
  • Your Vehicle: My FED, Jurassic Parts 2
  • General Location: East of England
Re: chassis top rail has bowed outwards
« Reply #1 on: November 14, 2020, 03:43:56 AM »
Hi Roo Man, what do you think? Value your comments