Front Spring Rate 1961 RPO 687

[Jerry G.]

Anyone know what the spring rate and wire diameter should be for this option?

[Dennis C.]

This doesn't answer your question, but...

...I believe they were identical to regular production. DC

[Joe L.]

Re: This doesn't answer your question, but...

Dennis and Jerry-----

I agree. RPO 687 for 1960-62 utilized the same springs as all other 1960-62 Corvettes. This spring had a rate of 1235 lbs. and a free height of 13-3/4". I don't know the wire diameter.

1957-59 with RPO 684 did use a different spring. That spring had a rate of 1145 lbs. and a free height of 11-1/8"

[Roy B.]

Re: Front Spring Rate 1961 RPO 687

Original springs will have a flat area at the top and the part# in them.

[Jerry G.]

Re: Starting to make sence

I'm learning about the 61 cars. This one has the appropriate brake hardware but i expected to see the monster springs and sway bar. I was a little concerned for a while. it does have the 5 leaf rear spring with the longitudinal groves.

[Mike E.]

Re: Starting to make sence

Jerry--
It shouldn't have 5-leaf rears. Should have 4-leaves, even for RPO687 usage. I'd guess that if you look carefully, one has been added. If not, check dates on the bottom leaf--it probably won't have a correct date for your 61.