412 rear axle

Kevin H · #1 (**permalink**) 03-09-23, 02:23 PM

Hi Andy,
I assume you mean the front suspension coil spring is broken?

As far as I am aware the front coil springs are not from any other car - they were made specifically for Bristol. Fortunately I have the spring specs, which Bristol kindly provided many years ago; this was for the 411, which has the same chassis as the 412.

This is the info you need to give to a spring maker:

306 lbs/inch +/- 15
spring wire diameter 0.625 inch
active coils 8.56
total coils 10.06
spring length should end up being 15 inches

If I were you I would get a pair of springs made and replace both of them.

Do you have the various parts that go above and below the springs? You can find pictures of the parts here http://www.bristolcars.info/forums/8...on.html#post83

I bought these parts from Bristol Cars Services, but I don't know where you would get them from now.

Regards,
Kevin

Andy G · #2 (**permalink**) 03-09-23, 02:42 PM

Thanks Kevin your a great help to me . Bigger, I really can't see they would have done that , the cost would have been big for no gain but if we don't know what they are then . Thanks Andy

Kevin H · #3 (**permalink**) 03-09-23, 03:00 PM

Andy,
Bristol Cars (Brian Marelli) gave me the spring specs because it was going to be very expensive to send springs to Australia from the UK. I'm sure if they were from another car Brian would have told me.

Bear in mind also, that Dennis Sevier went to great lengths to perfect the front suspension in the 411, so it is very likely he produced his own spring specs, after all, it wasn't expensive to get springs made.

Regards,
Kevin

Andy G · #4 (**permalink**) 03-09-23, 03:31 PM

Thanks again .
She is coming along nicely .
Thanks .
A friend of mine has just finished a 15 restoration of a 67 Mustang fastback 309 . He looked at the Bristol yesterday and couldn't believe how i have bought the chassis back . Hee didn't think it was going to be as good as it is , that was nice