Spring rates

[David McCollam]

Anyone know the stock front and rear spring rates for the '74 Manta Rallye? I'm trying to get some Bilstein shocks reconditioned and would like to send that information with them.

Thanks,

Dave

[baz]

dave it takes 1 min in the search engine to answer that old chestnut you should be doing that first by now

[Paul]

Dave, I'll stick up for you against Baz on this one. The spring rates for a Rallye Manta have never been posted on this site. RallyBob has given me the rates for plain Manta before, and someone else has surmised how much the springs are stiffer for a Rallye. I would have answered sooner but my hard copies are at home. But I'll try to list from memory for the plain Manta.
Front 135 pounds/inch Linear
Rear 113 to 180 progressive

I found an old email and updated the numbers above...

Awhile back I sent my Bilsteins in and had them rebuilt and dynoed. If you like we can compare notes on the valving of my shocks......

[baz]

they are the spring rates i can find for mantas on site and if i post the ones in my book it will make folks scratch heads as they are in kg/cm
but i can only find 1 set of rates so assume they cover rallye too as rallye is a trim level not a tuning level as far as i know

[David McCollam]

Guys,

Baz, I searched first, but may not have used the right search combination. I appreciate the reminder nonetheless. Paul, thanks for the spring rates. I don't know how much "spring" is left in my springs but I appreciate the help. I may need to get some new springs instead.

Thanks again.

Dave

[David McCollam]

Paul,

I've got no valving info on the units on my car. They came on it when purchased. Any info on the settings in yours is helpful and the performance that you experience with them.

Dave

[RallyBob]

Originally Posted by baz they are the spring rates i can find for mantas on site and if i post the ones in my book it will make folks scratch heads as they are in kg/cm but i can only find 1 set of rates so assume they cover rallye too as rallye is a trim level not a tuning level as far as i know

Baz, kg /cm is no big deal to decipher. Example: 50 kg/cm is 50 x 2.2 x 2.54 = 279.4 lbs/inch.

My Opel microfische shows one spring rate for US-spec Manta's, only the shock part # differs for the Rally. European cars are another issue altogether, there are lots of optional springs (heights and rates) depending on country and spec level.

Bob

[Paul]

Dave,

I sent mine in and had them put the shocks in the dyno and give me a call. From there it was a fun process. I've got more info than can be put into this site and it will be confusing at best. The best thing to do is contact me off list ftsmithpaul at cox.net. I can forward you pages and pages of info. Also, I would advise you give me a call 479-739-2544 (moble) and I can walk you thru what was done and my impressions of the results.

Paul Crane