[er455]

I have Viking front coil over setup with there double adjustable shocks and I bought the 550# springs , I am having a hard time getting the front end to lift up to transfer weight , sould I have gotten 350 # springs ???

[Mean Green]

They recommended 350 lb springs for me, all steel except the hood and all factory glass.

[Mark G]

Originally Posted by er455

I have Viking front coil over setup with there double adjustable shocks and I bought the 550# springs , I am having a hard time getting the front end to lift up to transfer weight , sould I have gotten 350 # springs ???

Same Kit but I have the 350 springs 1.24 60ft very small hit foot braking ….

[johnta1]

Coil Spring Rate

[Vince GTO]

Have you scaled the car? I just went through this needed the weight front vs rear and shock angles.

[Gary Kubisch]

In my experience coil overs can be the wrong choice for a drag car with lower power levels.

The spring doesn't store enough energy due to the smaller physical size.

That said...550lb is a very stiff spring. I can't imagine that heavy of a front spring for any drag car

[blaktopr]

I run coil overs up front. For my weight they set me up with a 10" 400 pound spring. I ended up checking how much the car dropped on that spring to establish the weight of the front. I then installed a 12" 300 pound spring. A little bit of a pain to get the nut started but then cranked up the preload to get the spring to compress to where it needed to be to hold the car up. Never scaled the car. This gives you more stored energy because of the less pounds per inch but compressing it over a longer distance. The 400 pound spring was at 1/2" of preload basically holding only 200# of weight at the top of the suspension travel. The 300# is preloaded about 2" give or take giving it 600# at top of suspension travel but still holding up the car at the same at ride height.

[er455]

Thanks guys , I have not scaled the car but I would guess 3,500 lbs , right now the car feels like it has very little stored energy , me and a buddy tried to lift the front end upward and barely got it to come up a few inch , this with the shocks set to full loose , I loosened the sway bar and loosened the a arm bolts a little as well to make sure no binding was happening... going to call Viking on Monday and ask about the 350 # springs and what length I need ...

[blaktopr]

Set spring preload and note the distance at shock fully extended. Then set the car down letting the spring compress to ride height and take another measurement how much more the spring compresses. If you do the math using the 550 pounds per inch of your spring you will get close to what weight the front end is applying to the spring. You can then check other rates per inch and other lengths of spring to get close to what you need.

[Mark G]

Originally Posted by Gary Kubisch

In my experience coil overs can be the wrong choice for a drag car with lower power levels.

The spring doesn't store enough energy due to the smaller physical size.

That said...550lb is a very stiff spring. I can't imagine that heavy of a front spring for any drag car

This>>>

[blaktopr]

Sorry, but I don't agree...

[JLMounce]

Check your rebound settings. With a double adjustable shock, you have the ability to tune both compression and rebound. If you've got a lot of rebound damping in the shock, they will limit weight transfer to the rear.

good for handling, not good for off the line weight transfer.

[er455]

Ok I jumped the gun before taking measurements of the spring being preloaded vs no load but I got them out to make sure they were 550 # spring and they are .....10”” long , so does anybody have these in a full weight trans am ? I am going to drop down the spring rate but worry that is will sit to low and I won’t be able to adjust them up .. do we agree that 550 #is too much for drag / weight transfer ? Thanks for help

[er455]

Originally Posted by JLMounce

Check your rebound settings. With a double adjustable shock, you have the ability to tune both compression and rebound. If you've got a lot of rebound damping in the shock, they will limit weight transfer to the rear.

good for handling, not good for off the line weight transfer.

I have them adjusted 14 on the compression and 4 on the rebound. They both go to 18

[Mark G]

Originally Posted by blaktopr

Sorry, but I don't agree...

No you don't car is dialed 10.00 must weigh 3500 lbs So 700 hp is not low hp..Low is 500 and under ..

[er455]

Ok so Viking Rep told me that the 350# rate spring is what I need so I ordered a set and will see if it helps ,

[455TA]

Originally Posted by er455

Ok so Viking Rep told me that the 350# rate spring is what I need so I ordered a set and will see if it helps ,

I have the 350# spring in mine - same exact coilover setup.
I get a little over 5 inches of travel which is perfect for the caltracs.
14 on compression, 2 on rebound has netted me 1.51 60 ft times with a very mild combo on 89 octane

[er455]

Originally Posted by 455TA

I have the 350# spring in mine - same exact coilover setup.
I get a little over 5 inches of travel which is perfect for the caltracs.
14 on compression, 2 on rebound has netted me 1.51 60 ft times with a very mild combo on 89 octane

Cool do you have the sway bar hooked up?

[455TA]

Originally Posted by er455

Cool do you have the sway bar hooked up?

No sway bar at all.
I've found that with the tubular control arms and viking coilovers that it handles pretty good without the swaybar anyways and it's not a corner carver so I just kept it off.

[er455]

Originally Posted by 455TA

No sway bar at all.
I've found that with the tubular control arms and viking coilovers that it handles pretty good without the swaybar anyways and it's not a corner carver so I just kept it off.

Ok thanks for the help ...