Help needed with info. on FJ oem spring data for our Files section

[Pat Conlon]

Hey folks, could you help me fill in this post in the Files section?  Thanks   Pat
http://www.fjowners.com/index.php?topic=1983.msg15753

[jamesearthdrum]

Hello Pat,
         Just read this thread. The OEM rear spring diameter on my 89' was 88mm. Probably the same from '88 - 91'. Penske Sport shock is the same dia.

james

[Pat Conlon]

Thanks James, I'll add it to the file!

Hello Pat,
         Just read this thread. The OEM rear spring diameter on my 89' was 88mm. Probably the same from '88 - 91'. Penske Sport shock is the same dia.

james

[Arnie]

Pat,

Rear OEM Spring Rate for '91-93  FJ1200s is ~700lbs/in.  Determined by test on 2 used OEM springs.

Sorry I took so long to reply, I misread your initial request.

Cheers,
Arnie

[Pat Conlon]

Thanks Arnie!
I have metric values shown in the table, so help me here, a spring @ 700 lbs/inch would be what, about .806 kg/mm correct?
http://www.onlineconversion.com/torque.htm

Do you recall the diameter of the shock spring? Is it 88mm like the earlier FJ's?

[LA Mike]

Pat,

Took my the spring off my 89 Fj shock to see if would work on a fox shock I'm rebuilding, race tech measured it just shy of 1075#'s. I would think that the '88,89 and 90 FJ would be the same, but the '88 was never sold in the USA.

LA Mike

[Pat Conlon]

Thanks Mike, so that would 1075 lbs/inch correct? Which should be about 1.23 kg/mm, I think...

Took my the spring off my 89 Fj shock to see if would work on a fox shock I'm rebuilding, race tech measured it just shy of 1075#'s. I would think that the '88,89 and 90 FJ would be the same, but the '88 was never sold in the USA.

LA Mike

[the fan]

19.2 kg/mm, but who is counting...

[Pat Conlon]

19.2 kg/mm, but who is counting...

Hmmm,  I'm doing something wrong, figures.... So,  Mike's 1075 lbs/in would be 19.2 kg/mm ?
Then using Arnie's 700 lbs/in would be what? about 12.5 kg/mm?

[LA Mike]

Hmmm,  I'm doing something wrong, figures.... So,  Mike's 1075 lbs/in would be 19.2 kg/mm ?
Then using Arnie's 700 lbs/in would be what? about 12.5 kg/mm?

When I was out at race tech they told me it was 19.2kg/mm, I just rounded it to 1075lbs/in when I converted it.

To convert kg/mm to lb/in you divide by 0.0179     19.2/0.0179 = 1072.6256lbs/in~1075lbs/in


LA Mike

[Pat Conlon]

ok, thanks Mike! See you in Willits.

[Pat Conlon]

Hello Pat,
         Just read this thread. The OEM rear spring diameter on my 89' was 88mm. Probably the same from '88 - 91'. Penske Sport shock is the same dia.

james

James, was this diameter ID or OD? Thx

[jamesearthdrum]

Hello Pat,
         Just read this thread. The OEM rear spring diameter on my 89' was 88mm. Probably the same from '88 - 91'. Penske Sport shock is the same dia.

james

James, was this diameter ID or OD? Thx

That is OD. I plan to remove the swing arm from the '85 to check the bearing and lube it. I'll measure the shock while it's apart.

[Pat Conlon]

Cool, thanks James!

[Marsh White]

FYI: I just measured my 89 OEM shock and the Outer diameter of the spring is 88 - 89 mm as well.  Oh - and the total shock weight is 7.5 lbs.  This will be the same for the 88-90 FJs.