66 sitting high in the rear
I have a 66 that is to high in the rear. It also bounces pretty bad when going over a bump. i have installed new blisten shocks and it didn't help. Also my have shafts are angled down. see pictures. the spring is a composite that was installed when i bought the car with 7" bolts. Should i get longer bolts and lower the rear? will that get rid of the bounce also? Thanks
https://cimg6.ibsrv.net/gimg/www.cor...957c464f5e.jpg https://cimg7.ibsrv.net/gimg/www.cor...707f3e2056.jpg |
I would start with that spring first
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you mean new bolts ie longer or a whole new spring?
Thanks for the repl |
What size are your tires.
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Originally Posted by kesslerg
(Post 1607525334)
you mean new bolts ie longer or a whole new spring?
Thanks for the repl |
It looks like someone replaced the original metal transverse spring with a composite spring. VBP and a few others manufactured these aftermarket parts. When I purchased my 66 someone had done the same swap. I found the ride to be way too harsh and that the car would buck me out of the seat on some bumps.
From the research I did I found that the VBP spring was too big (spring rate was too strong) which is what caused the bouncy ride. I replaced the spring with one with a lower spring rate and purchased better rear shocks to control the compression and rebound. In that process i also purchased longer rear spring bolts and shims to dial in the rear ride height. Hope this helps, Ted |
Is the rear too high or are your wheels and tires way off size?
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TRP IV said it best. The rating on your spring is to much, probably the 360 or 400. The 300 and 330 will make a big difference. Go to Van Steel.com and look at the tech info on composite springs. VBP is no longer business having been overtaken by Van Steel. :cheers: Dennis
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The boingy, boingy ride is due to the composite spring. Stock metal leaf springs have inherent damping due to friction between the leaves. That composite spring doesn't have that built in damping. You need to compensate by installing stiffer shocks.
Ride height can be adjusted by installing longer spring bolts. This said, if the spring rate is too high, you'll still have a harsh ride, even with stiffer shocks and longer bolts. |
ok, looks like i need to go back to a steel spring that is 300 or 330. get that installed and play with the ride height.
THANKS To All |
also note the stock set up is also dependent on the correct tire sidewall tire size.
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Tires are 225/50ZR17
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Originally Posted by kesslerg
(Post 1607527796)
Tires are 225/50ZR17
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Originally Posted by kesslerg
(Post 1607527606)
ok, looks like i need to go back to a steel spring that is 300 or 330. get that installed and play with the ride height.
THANKS To All |
One last question. My car is not numbers matching and i use it for weekend drives and cruises. I have read a lot about composite vs steel springs ie composite is more bouncey. It seems there are more composite springs out there for sale. I am looking for a smooth comfortable ride. So i am thinking a 300 (is the 300, 330, 360 the more important factor?) spring, but composite or steel. i am leaning composite????
Thanks |
Originally Posted by kesslerg
(Post 1607531879)
One last question. My car is not numbers matching and i use it for weekend drives and cruises. I have read a lot about composite vs steel springs ie composite is more bouncey. It seems there are more composite springs out there for sale. I am looking for a smooth comfortable ride. So i am thinking a 300 (is the 300, 330, 360 the more important factor?) spring, but composite or steel. i am leaning composite????
Thanks |
ok, so steel spring is the best.
thanks |
Originally Posted by kesslerg
(Post 1607531930)
ok, so steel spring is the best.
thanks https://eatondetroitspring.com/db/es...+5.4L+-+327cid |
Originally Posted by leif.anderson93
(Post 1607532287)
Contact CADBrian (in post #14) for one of his pre-owned springs or you can get a new spring from Eaton.
https://eatondetroitspring.com/db/es...+5.4L+-+327cid https://eatondetroitspring.com/db/es...+5.4L+-+327cid Chalie |
Originally Posted by kesslerg
(Post 1607525334)
you mean new bolts ie longer or a whole new spring?
Thanks for the repl |
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