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Re: Leaf spring advancements [Re: Dart451] #3127962
03/09/23 10:40 PM
03/09/23 10:40 PM
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bean town ....Ca
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WHITEDART Offline OP
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Originally Posted by Dart451
Do you know the current spring rate?
200 lb


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Leaf spring advancements [Re: moparacer] #3127963
03/09/23 10:42 PM
03/09/23 10:42 PM
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Originally Posted by moparacer
My theory is as stiff as possible on the front segment and soft on the rear. Kind of mimic what a ladder bar does with the front being stiff and the rear having the springs that hold up the car. All the rear segment would do is technically hold the car up.
. One current thought is to mix in a set of composite Landrum on the back half which I can get in 175 lb spring rate which is a little lighter then what we currently have not to mention gets rid of quite a bit of weight


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Leaf spring advancements [Re: n20mstr] #3127992
03/10/23 12:10 AM
03/10/23 12:10 AM
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Portage,michigan
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Originally Posted by n20mstr
just add a small plate kit ..... shruggy


I know...... LMAO , im just being "that guy"

Props for keeping it all motor

The level your at now......info doesnt seem to come easy .
As already mentioned, get with a "good" shock guy and hopefully you get some help. ALSO 235 radial cars are right at your ET level, and yes they have a power adder but some are leaf spring cars and maybe some of that info can crossover to your program.
Are you data logging, and do you have rear shock sensors to see the travel as the car is going down the track??

AND ....nitrous cars dont add power down track, usually the kit is all in by .9 or less , so in reality you are pretty close to a 235 radial car


There were a few 235 cars in the 90’s at Lights out. Was fun being down there watching them
Stef, who many on here know , was down there with his son and his 235 Duster with gen3 power. Brand new motor, they were in the mid teens with 1.15 60 foot leaving at 30% this in 85 degree heat. On Leafs, about 75 pounds to heavy
Not sure if it was Bradenton or Orlando but somebody went 4.65. I understand it’s an “ outlaw” car, not sure what isn’t legal on it, or who it was.

Last edited by B3422W5; 03/10/23 12:11 AM.

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8

Re: Leaf spring advancements [Re: WHITEDART] #3128040
03/10/23 09:46 AM
03/10/23 09:46 AM
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Not like you’re bound by rules! Back half time! smile

Re: Leaf spring advancements [Re: B3422W5] #3128053
03/10/23 10:23 AM
03/10/23 10:23 AM
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On the parachute mount
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On the parachute mount
Originally Posted by B3422W5
Originally Posted by n20mstr
just add a small plate kit ..... shruggy


I know...... LMAO , im just being "that guy"

Props for keeping it all motor

The level your at now......info doesnt seem to come easy .
As already mentioned, get with a "good" shock guy and hopefully you get some help. ALSO 235 radial cars are right at your ET level, and yes they have a power adder but some are leaf spring cars and maybe some of that info can crossover to your program.
Are you data logging, and do you have rear shock sensors to see the travel as the car is going down the track??

AND ....nitrous cars dont add power down track, usually the kit is all in by .9 or less , so in reality you are pretty close to a 235 radial car


There were a few 235 cars in the 90’s at Lights out. Was fun being down there watching them
Stef, who many on here know , was down there with his son and his 235 Duster with gen3 power. Brand new motor, they were in the mid teens with 1.15 60 foot leaving at 30% this in 85 degree heat. On Leafs, about 75 pounds to heavy
Not sure if it was Bradenton or Orlando but somebody went 4.65. I understand it’s an “ outlaw” car, not sure what isn’t legal on it, or who it was.


The car you speak of going 4.60's on a 235 , yes that is a Fox body with a Turbo BB chevy based engine, Its not follwing the 235 class rules. So really not a fair comparison that car can run 4 teens on a 275


....BAD A$$ STREET CAR.....
Re: Leaf spring advancements [Re: n20mstr] #3128064
03/10/23 10:36 AM
03/10/23 10:36 AM
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W. Kentucky
justinp61 Offline
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Those 235 guys are impressive, to me at least. 5.0's with a n/a small block is more impressive though!

Re: Leaf spring advancements [Re: justinp61] #3128104
03/10/23 12:09 PM
03/10/23 12:09 PM
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B1Frank Offline
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I see both side's of the story, if you want to go fast i would go with the mono-leaf, I am building a car like i was #16 years old, that is why i moved in the spring #3 inches, with the super-stock spring, it was around then. that is a good point !

Last edited by B1Frank; 03/10/23 12:14 PM.
Re: Leaf spring advancements [Re: n20mstr] #3128134
03/10/23 01:16 PM
03/10/23 01:16 PM
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Originally Posted by n20mstr


The car you speak of going 4.60's on a 235 , yes that is a Fox body with a Turbo BB chevy based engine, Its not follwing the 235 class rules. So really not a fair comparison that car can run 4 teens on a 275


They legged it out on the last day of Sick Week to go 7.1X@206 or something dumb on a 235 tire lol.


68 Barracuda Formula S 340
Re: Leaf spring advancements [Re: Bad340fish] #3128149
03/10/23 01:51 PM
03/10/23 01:51 PM
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Pattison Texas
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As Dragula said, get the calver sliders, they are made at an angle & will give you more axle drop, or something like these ???

Screenshot (26).png
Last edited by CSK; 03/10/23 01:54 PM.

1968 Charger COLD A/C Hilborn EFI
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2020 T/A 392 Stock 11.79 @ 114.5

Re: Leaf spring advancements [Re: CSK] #3128205
03/10/23 05:01 PM
03/10/23 05:01 PM
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bean town ....Ca
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WHITEDART Offline OP
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I did purchase a set of those just not sure I want to go to that


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Leaf spring advancements [Re: WHITEDART] #3128210
03/10/23 05:34 PM
03/10/23 05:34 PM
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Dart451 Offline
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Originally Posted by WHITEDART
Originally Posted by Dart451
Do you know the current spring rate?
200 lb

So you could calculate from that.
How many inch's do they compress at ride height?
What's the front and rear spring segment lengths?

Re: Leaf spring advancements [Re: WHITEDART] #3128295
03/10/23 11:29 PM
03/10/23 11:29 PM
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bean town ....Ca
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Aluminum caltrac upgrade

20230310_165927.jpg

In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Leaf spring advancements [Re: WHITEDART] #3128299
03/10/23 11:55 PM
03/10/23 11:55 PM
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Hollow 7075 saved a few ounces on each side

Screenshot_20230310_193435_Gallery.jpgScreenshot_20230310_193410_Gallery.jpgScreenshot_20230310_193359_Gallery.jpg

In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Leaf spring advancements [Re: WHITEDART] #3128391
03/11/23 12:16 PM
03/11/23 12:16 PM
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PA
moparacer Offline
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Originally Posted by WHITEDART
Hollow 7075 saved a few ounces on each side


Sweet! Just as long as it can handle the stress they see at launch and not flex or bend. I bet its is pretty high.


67 Barracuda street/bracket car 11.27-119
68 Dart 502 BB 8.70s-152
414 cid SB Dragster 7.65-174
Re: Leaf spring advancements [Re: moparacer] #3128425
03/11/23 01:41 PM
03/11/23 01:41 PM
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MI, usa
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The Khouty boy's were having consistancy issues last year with their all motor car. Vince senior told them to take out the titainium 4 link bars and replace them with steel. It fixed the issue.
Doug

Re: Leaf spring advancements [Re: dvw] #3128443
03/11/23 02:33 PM
03/11/23 02:33 PM
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bean town ....Ca
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WHITEDART Offline OP
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Originally Posted by dvw
The Khouty boy's were having consistancy issues last year with their all motor car. Vince senior told them to take out the titainium 4 link bars and replace them with steel. It fixed the issue.
Doug
these are made out of 7075 which technically is stronger than the material that was originally used I have ran them for two events now with great success I can't say there was any Improvement but the car definitely went straight every pass


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Leaf spring advancements [Re: WHITEDART] #3128478
03/11/23 04:12 PM
03/11/23 04:12 PM
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Canada
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Originally Posted by WHITEDART
Has anybody thought about changing out the rear segment on a Calvert mono leaf for more or less stored energy ..
has anybody ever mixed a composite rear segment with a steel front segment
I'm currently working on changing things around looking for more stored energy however the Calvert Springs just do not have very much Arch definitely not as much Arch as I would like.. the rear end currently suspends 3 inches from ride height before the car has to fight the spring as well as the shock I'd like to increase that to 5 in of free travel and maintain a relatively low stance



I would get some LP racing rear leaf spring brackets, if your sticking radial, and a set of shock sensors. Do you run an ARB in the back?

Re: Leaf spring advancements [Re: cuda499] #3128483
03/11/23 04:22 PM
03/11/23 04:22 PM
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bean town ....Ca
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I have the second set he ever made however I haven't installed them yet no I do not run an ARB

Last edited by WHITEDART; 03/11/23 04:22 PM.

In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
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