Super stock spring weights

[Bracket Racer]

I have a 65 coronet relocated springs and mini tubbed.
I like the ride hight but I have 2” angled lowering blocks with correct pinion angle.
I have Super stock spring 3600lb # P3690460 & 461.
I would like to remove the lowering blocks, can I accomplish this simply by changing the spring to 3400lb #p3690456 & 457.
Or spring 3300lb # p4120865 & 866
It’s a Street Car that will be raced.
I am just not confident what 2”blocks will do to the spring geometry for racing.
Any help would be appreciated
Thank you

 

[Darter6]

I run the 3400 lbs springs,no blocks This is the ride height.30'' rear tires.

 

[Darter6]

Also I ran 2 '' blocks on a 67 Dart full time drag car with 3000 lbs springs .
Depending on how much HP you throw at it, say 500 or less you should not have a problem (with blocks )as long as pinion angles are correct.
Is your car a automatic ?

 

[Bracket Racer]

I run the 3400 lbs springs,no blocks This is the ride height.30'' rear tires.
View attachment 1195202

That is nice looking, thank you so much for reaching out.
My car sits a little lower yet.
I run a 29/12.5. 15 Hoosier. But I am putting a 315 Mickey Thompson ET street on it this winter and Torque thrust also.
Do you think the 3300 pound Spring would get me where I need to be?
Is there a problem going that light (3300)?
Could you share any more pictures of your car? It looks sharp and Thank you

 

[Bracket Racer]

Also I ran 2 '' blocks on a 67 Dart full time drag car with 3000 lbs springs .
Depending on how much HP you throw at it, say 500 or less you should not have a problem (with blocks )as long as pinion angles are correct.
Is your car a automatic ?

Yes it is automatic and I would only foot brake this car. Frame is tied but no roll bar. If I had to guess 11.50s

 

[33 IMP]

Here's mine. 456/457 in a 3300 lb 62. 10.5/28x15. Thin plate for pinion angle correction. These springs have about half the rearend lift (at launch at the strip, not body height) that the previous (stock 62, or maybe something else?) had.
Sorry the pic is deceptive. It has the front on jackstands, which strangely lifts the rear too. It sits more like the second pic, probably an inch lower than the wheel only pic

 

[Bracket Racer]

Here's mine. 456/457 in a 3300 lb 62. 10.5/28x15. Thin plate for pinion angle correction. These springs have about half the rearend lift (at launch at the strip, not body height) that the previous (stock 62, or maybe something else?) had.
Sorry the pic is deceptive. It has the front on jackstands, which strangely lifts the rear too. It sits more like the second pic, probably an inch lower than the wheel only pic

View attachment 1195234 View attachment 1195235 View attachment 1195236

Great pictures and information, nice ride and Thank you

 

[65hemi]

I have 456/457 SS springs on my 65.
Scales at 3660.

 

[Bracket Racer]

I have 456/457 SS springs on my 65.
Scales at 3660.
View attachment 1195252

Wow that is a great looking ride. Nice job and Thank you very much for sharing it

 

[66Satellite47]

In my '65 Coronet drag car in the '70's & mid '80's I copied a buddy's 002/003 springs, worked great. Ride height was wheel lip about even with top of the rim, 3550# w/ me. My current '66 Satellite now has 3300# SS springs that I had sitting on the shelf from a project I didn't complete. They are not what my Satellite wanted, I added a leaf on each side of he 3300# springs with measurements to simulate the 002/003 spring stack. The Satellite is about 3750 w/me and has a 700 HP 512" motor.
My bet is the 3400# springs would be good for you.

 

[Bracket Racer]

In my '65 Coronet drag car in the '70's & mid '80's I copied a buddy's 002/003 springs, worked great. Ride height was wheel lip about even with top of the rim, 3550# w/ me. My current '66 Satellite now has 3300# SS springs that I had sitting on the shelf from a project I didn't complete. They are not what my Satellite wanted, I added a leaf on each side of he 3300# springs with measurements to simulate the 002/003 spring stack. The Satellite is about 3750 w/me and has a 700 HP 512" motor.
My bet is the 3400# springs would be good for you.

Thank you very much, I was hoping someone tried this. So if I understand correctly the 3300lb spring #4120865 / 866 would make my coronet wheel lip be lower than the top of my rim? To make it even with top of rim , you are thinking 3400lb #3690456 / 457 ?

In my '65 Coronet drag car in the '70's & mid '80's I copied a buddy's 002/003 springs, worked great. Ride height was wheel lip about even with top of the rim, 3550# w/ me. My current '66 Satellite now has 3300# SS springs that I had sitting on the shelf from a project I didn't complete. They are not what my Satellite wanted, I added a leaf on each side of he 3300# springs with measurements to simulate the 002/003 spring stack. The Satellite is about 3750 w/me and has a 700 HP 512" motor.
My bet is the 3400# springs would be good for you.

I was hoping someone actually tried this. Yes I would like to keep the top of the rim level with the wheel well lip. That

’s pretty much the way it sits now with the 2” blocks and 3600lb .
I will try the 3400lb with no blocks and see how it looks.
Thanks again for taking the time to reach out.

 

[66Satellite47]

My issue with the 3300# springs on my Satellite was at the track, they didn't control the rear suspension reaction the way I wanted. The ride height with the 3300# springs was slightly (3/4-1") below the rim. But with my 512" & the convertor I have, I needed a stiffer spring.
I have buddy that used the 3400# spring and the ride height was great, right at the top of the rim.

 

[Bracket Racer]

My issue with the 3300# springs on my Satellite was at the track, they didn't control the rear suspension reaction the way I wanted. The ride height with the 3300# springs was slightly (3/4-1") below the rim. But with my 512" & the convertor I have, I needed a stiffer spring.
I have buddy that used the 3400# spring and the ride height was great, right at the top of the rim.

Perfect, This is great information. Thanks so much

 

[Darter6]

I have 456/457 SS springs on my 65.

Me Too !
Bracket Racer, Photos you asked for.

And back in it's racing days

 

[Bracket Racer]

Me Too !
Bracket Racer, Photos you asked for.
View attachment 1195361 View attachment 1195362
And back in it's racing days
View attachment 1195364

Wow, that is sharp. Great job and thanks for sharing it.

 

[Bighead440]

I am also trying to figure out SS spring weight ratings. I have a '66 Coronet that I originally bought 3800# springs for, but have since changed to 3600# which seem to work better (automatic trans/footbrake). Now I am scrounging parts for a '63 Belvedere post which will be a hard launching 4-speed car. Normally I would consider 3400#-rated springs with an automatic, but could I magically have the right springs with the 3800# leftovers?

 

[Darter6]

The 63 post cars were pretty light.
I don't have the exact weight but I believe it was around 33-3400 LBS.
I'm sure someone will chime in with the right weight.

 

[Bighead440]

The 63 post cars were pretty light.
I don't have the exact weight but I believe it was around 33-3400 LBS.
I'm sure someone will chime in with the right weight.

I agree, but I think the manual trans cars may require a heavier rated spring. I need to get into my chassis manual, but real world experience would be appreciated! Trying to avoid CalTracs, etc.

 

[rumblefish360]

With the shock of the clutch hit on a 4spd car, probably not a bad idea. I used the 460/461 springs on my ‘73-4spd 360 for this reason.

Some (non-racers) thought I could have gone lighter, but I don’t really follow public opinion on what my car needs since most are trailer queen rides own by people that don’t race but I’ll follow the suggestions of a racer since there doing it. It all worked very well for me.

 

[33 IMP]

I am also trying to figure out SS spring weight ratings. I have a '66 Coronet that I originally bought 3800# springs for, but have since changed to 3600# which seem to work better (automatic trans/footbrake). Now I am scrounging parts for a '63 Belvedere post which will be a hard launching 4-speed car. Normally I would consider 3400#-rated springs with an automatic, but could I magically have the right springs with the 3800# leftovers?

You have em. Try em! Costs nothing but elbow grease. If they don't work, you will have a hint which way to go.
(And for what it's worth, I think stiffer with the stick is the right way to go.)