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Re: Slapper Bars on a Mopar
[Re: qwkmopardan]
#945625
03/08/11 12:49 AM
03/08/11 12:49 AM
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Joined: Jun 2009
Posts: 429
Sherman Texas
The Shocker
OP
mopar
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OP
mopar
Joined: Jun 2009
Posts: 429
Sherman Texas
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Quote:
Quote:
Sorry ,but there is a slight difference in a car that launches with 4.56 gears and a low geared 1st in 3 spd 727 at 4400 rpm vrs one that has a 1.76 low PG and 4.10 gears at 3500 rpm  .BTW my 408 is a 10 to 1 motor with a .484 lift 235 duration cam with unported iron heads ...
A 727 and a set of S/S springs with a good tune-up your car would run 6.80s
I agree ,are you buying ? I have less $$ in this car than most people have in their pit vehicles ...
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Re: Slapper Bars on a Mopar
[Re: qwkmopardan]
#945627
03/08/11 12:54 AM
03/08/11 12:54 AM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
Sorry ,but there is a slight difference in a car that launches with 4.56 gears and a low geared 1st in 3 spd 727 at 4400 rpm vrs one that has a 1.76 low PG and 4.10 gears at 3500 rpm .BTW my 408 is a 10 to 1 motor with a .484 lift 235 duration cam with unported iron heads ...
And there you have it!
Your combo is running great with the slappers in your case/combo.
Typically, slappers on the mopars front Short spring segment create to much leverage causing a violent seperation between axel and body resulting in wheel hop.
But with your HP and overall gear and stall you have them working just fine, IMO All your incremental numbers are in line. Your actual 11.48 ET is a bit fast for your 113 mph.  
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Re: Slapper Bars on a Mopar
[Re: The Shocker]
#945628
03/08/11 12:58 AM
03/08/11 12:58 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
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This is for all of you that say a Mopar cant work with slapper bars.
Well, they work on every leaf sprung nova Ive ever seen. Why not a Dodge? The bar just look bad(ugly)IMO. Im just one of those kinda guys. What happens when u take them off?
I have always heard that they cant work cuz of the Mopars having short front spring segments in comparison to a Ford or GM .My Dart had nothing for traction devices when i got it and got 1.65- 1.68 60 foots most of the time plus would spin the slicks easily as the rearend would sqaut .It also bent the shocks from the rearend rolling up off the hit of the throttle .Once i got the Slapper Bars figured out my 60's went to mid to high 1.5 60 foots everytime and no wheel spin or spring wrap ,plus it lifts the front and back of the car on the hit of the throttle with them.Would Caltracs or S/S springs work on my car ? Sure they would .Would it be as cheap ? Not by a long shot .I had a few people in the pits walk by my Dodge in the pits and say "are those slapper bars on a Mopar "???
All that was wrong with your car prior to the bars
was a set of shot springs(and maybe shocks)... the
old springs looked like a pretzel on the hit...
thats why it would squat
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Re: Slapper Bars on a Mopar
[Re: The Shocker]
#945629
03/08/11 01:04 AM
03/08/11 01:04 AM
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Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
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Quote:
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The Chevy picture is pretty cool (hey, it's not a Camaro).
There is a couple of good (funny) one liners in here.
#1. Somebody said Shocker needs a "magnifying glass" to see his air. (Sorry Shocker, but that was funny.)
#2. This guy with the 63 Plymouth said at one time, he upgraded from a 1964 to a 1965 spring.
Thanks for the laughs. 
Agreed on both were fuuny,but Sams clever sarcasim was good enough to make me spit iced tea on my keyboard .I would have to give it atleast a 9.5.The "magnififying glass" thing made me chuckle ,but i didnt spit my iced tea .I will give it a 6 to 7  ...
Keep the slapper bars,just need an 8 track playin' "SUPERSTOCK DODGE" 
HEMI-ITIS has no cure.
My condition is fully BLOWN!!
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Re: Slapper Bars on a Mopar
[Re: The Shocker]
#945630
03/08/11 01:21 AM
03/08/11 01:21 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I was just showing that pic of my car to prove that the tires are dead hooking (obviously). In the pick of my car the tires are spinning... if you get UP on the tire you can get a better 60' and ET (but not in all cases)... just wanted to say that it doesnt have to dead hook to lift them
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Re: Slapper Bars on a Mopar
[Re: The Shocker]
#945632
03/08/11 01:27 AM
03/08/11 01:27 AM
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Joined: Jan 2003
Posts: 1,263
Southwestern Ontario Canada
racealittle
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,263
Southwestern Ontario Canada
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Sure they work. A lot of things work. Some things work better than others.
Bottom line is for how long?
A friend of mine had them on a V8 AMC AMX (1979 or 1981,...whatever?).
He loaded the car with a 1968 Javelin drivetrain (343 ci, 4speed, and 4.10 rear end). He had slapper bars on the rear.
First time out he broke the tailshaft of the tranny and damaged the driveshaft.
He replace the 4spd, new driveshaft. Within a handfull of passes the spring perches broke and put him back on the trailer.
Replaced the 4 spd with an amc 727 and 4000 stall. Next outing, it only took a couple of passes and he spun the center of the rear end at the housing ends in the '68 Javelin rear end.
This was only a low 12 car that should have been in the 11's with ease.
I always heard slappers eventually bend things.
I was there, witnessing things bend till they broke.
We repaired things, and I removed the factory clamps on the rear segments. The rear segments fan about a foot on launch. Still running low 12's for a few outings, then performance started to go away.
This car ran in Bens' Promax headsup street series that was at Indy a few years back. The motor was hurt that day.
After seeing all that, I would not run slappers on a serious car. It's not worth the grief.
I like your car, we ran something like that around 1972 with a 360 in it.
Last edited by racealittle; 03/08/11 01:38 AM.
Too many cars, too many parts, too little coin, too little space to work in, too little time left to make it all happen!
Update: down to one ride, still too many parts, a little more jingle in the pocket, gaining space, and it's going to happen this year!
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Re: Slapper Bars on a Mopar
[Re: BradH]
#945633
03/08/11 02:29 AM
03/08/11 02:29 AM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
If you can dig up a picture of Joe Aluise's Max Wedge A/SA car from around 2000, it might surprise (disturb?) you to see slapper bars on it... and it was probably the fastest Mopar Stocker on the planet at that time, too.
If you know how and take measures to control the extra leverage of a slapper bar, sure you can make them work. On a heavier car its easier and a lighter car its harder. On a lower HP car its easier and a higher HP car its harder.
No Doubt, the front Short segment of the mopar spring makes the use of a slapper bar a issue when it comes to a high HP/torque build. Even a "non slap" SS Machine bar can over rotate a rear axel assembly causing problems.
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Re: Slapper Bars on a Mopar
[Re: racealittle]
#945634
03/08/11 02:49 AM
03/08/11 02:49 AM
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Joined: Oct 2004
Posts: 6,293
Northeast, Alpine, NY
9 Sec Phill
On a road near you
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On a road near you
Joined: Oct 2004
Posts: 6,293
Northeast, Alpine, NY
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Quote:
Sure they work. A lot of things work. Some things work better than others.
Bottom line is for how long?
A friend of mine had them on a V8 AMC AMX (1979 or 1981,...whatever?).
He loaded the car with a 1968 Javelin drivetrain (343 ci, 4speed, and 4.10 rear end). He had slapper bars on the rear.
First time out he broke the tailshaft of the tranny and damaged the driveshaft.
He replace the 4spd, new driveshaft. Within a handfull of passes the spring perches broke and put him back on the trailer.
Replaced the 4 spd with an amc 727 and 4000 stall. Next outing, it only took a couple of passes and he spun the center of the rear end at the housing ends in the '68 Javelin rear end.
This was only a low 12 car that should have been in the 11's with ease.
I always heard slappers eventually bend things.
I was there, witnessing things bend till they broke.
We repaired things, and I removed the factory clamps on the rear segments. The rear segments fan about a foot on launch. Still running low 12's for a few outings, then performance started to go away.
This car ran in Bens' Promax headsup street series that was at Indy a few years back. The motor was hurt that day.
After seeing all that, I would not run slappers on a serious car. It's not worth the grief.
I like your car, we ran something like that around 1972 with a 360 in it.
I agree 100%. With any kind of power slapper bars will break an 83/4's axel tubes. My old cuda ran 1.36 60' with mexico SS springs and mopar drag shocks with no snubber on DOT tires. I wouldnt run them. As far as the Cal tracs, Why spend another 600$ to replace some thing that already seems to be workin good.
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Re: Slapper Bars on a Mopar
[Re: qwkmopardan]
#945636
03/08/11 10:48 AM
03/08/11 10:48 AM
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Joined: Jan 2003
Posts: 8,936
Holly/MI
Dean_Kuzluzski
master
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master
Joined: Jan 2003
Posts: 8,936
Holly/MI
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Wow! Tough crowd.
Seems like the knowledgeable ones that left were quickly backfilled.
Can't a guy post something he found works for his combo.
The way I see it, slabberbars redirect energy like a 4-link but need to be the length to which they hit under the springeye. Caltracs do it, but with the enhancement of its patented design. Otherwise, I'm sure his stock springs would wrap-up as he has mentioned.
I guess we all have to justify our money spent and how ours works for us.
R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04
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Re: Slapper Bars on a Mopar
[Re: Dean_Kuzluzski]
#945637
03/08/11 11:29 AM
03/08/11 11:29 AM
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Joined: Dec 2005
Posts: 1,495
Shelby mi.
JAKE68
pro stock
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pro stock
Joined: Dec 2005
Posts: 1,495
Shelby mi.
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Because of the mopar short front segment of their spring slapper bars are not needed. if they worked it is because he was bandaiding something wrong. the only thing the bars do is stop the front segment from wrapping up. he could have accomplished this with just a pinion snuber. also the bars are not hard on any parts ect. mopar has the shortest front segment in the buissness. that is why we kind of make fun of some one who uses them on a mopar. as for the bars on the pickup those are just another slapper bar design they are not even close to a caltrac set up as how they work they still only stiffen the front segment. so did they work for him yes because he probably had worn out parts that alowed the spring to not plant the tire. most likley a well tuned in snubber would have given the same resaults and this thread would have not been here.
JAKES AUTOMOTIVE
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Re: Slapper Bars on a Mopar
[Re: JAKE68]
#945638
03/08/11 12:59 PM
03/08/11 12:59 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
Because of the mopar short front segment of their spring slapper bars are not needed. if they worked it is because he was bandaiding something wrong. the only thing the bars do is stop the front segment from wrapping up. he could have accomplished this with just a pinion snuber. also the bars are not hard on any parts ect. mopar has the shortest front segment in the buissness. that is why we kind of make fun of some one who uses them on a mopar. as for the bars on the pickup those are just another slapper bar design they are not even close to a caltrac set up as how they work they still only stiffen the front segment. so did they work for him yes because he probably had worn out parts that alowed the spring to not plant the tire. most likley a well tuned in snubber would have given the same resaults and this thread would have not been here.
 No bars on this car, Only an added leaf tothe stock springs and a snubber. 1.55/1.56 60's all day and runs 11.40's. 
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Re: Slapper Bars on a Mopar
[Re: maximum entropy]
#945640
03/08/11 03:17 PM
03/08/11 03:17 PM
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Joined: Jan 2003
Posts: 16,619
Almost Heaven
B_Body_Bob
Master of nothing
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Master of nothing
Joined: Jan 2003
Posts: 16,619
Almost Heaven
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Quote:
i used them for MANY years. until the fuzz made me remove them from my car one night. said they would " dig into the ground if i got a flat", and i would "lose control of the vehicle".
I had a roadrunner in high school with slappers, in around 79. One day I ran over a piece of plate steel left on the road to cover some road work. For some reason I didn't put a tire on it to hold it down, and the steel plate sucked up and under my car, ending up spit out the back after wrapping the passenger side slapper bar around backward and bending the rim on that side. I figure it dug into the ground during that process, but at 50-60 MPH or more, it didn't do much to stop the car. Probably harshed my 17 year old mellow though.
... and yes, I put another set on the car, probably on my next payday.
Everybody makes fun of a hillbilly until they need something fixed
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Re: Slapper Bars on a Mopar
[Re: Dean_Kuzluzski]
#945641
03/08/11 06:39 PM
03/08/11 06:39 PM
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Joined: Jun 2009
Posts: 429
Sherman Texas
The Shocker
OP
mopar
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OP
mopar
Joined: Jun 2009
Posts: 429
Sherman Texas
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Quote:
Wow! Tough crowd.
Seems like the knowledgeable ones that left were quickly backfilled.
Can't a guy post something he found works for his combo.
The way I see it, slabberbars redirect energy like a 4-link but need to be the length to which they hit under the springeye. Caltracs do it, but with the enhancement of its patented design. Otherwise, I'm sure his stock springs would wrap-up as he has mentioned.
I guess we all have to justify our money spent and how ours works for us.
Smart guy .The key to getting the slapper bars to work is getting them directly under the spring eye as you mentioned.Also setting the preload plays a big part in how they work or dont work .I made different thickness shims out of some round aluminum stock (i got for free)that i drilled a hole in the center of.I put them between the bars and the snubbers to set the preload.A pinion snubber would control spring rap ,but i like the bars because it applies the upward force a bit further foward and as i mentioned you can fine tune it side to side which is why my car lifts the front evenly on each side ,instead of leaning to one side when it hits.The bars that im using are old Competion type with the spring plates made to them and are heavy wall tubing.They are not the cheap ones that clamp to the springs.The springs are worn on my car and i know that ,and im sure sum new s/s springs would do they same thing ,but this way works well to and its easier to tune them IMO and i dont even need a wrench to do it at the track .Thanks for the support also ...
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Re: Slapper Bars on a Mopar
[Re: MoparforLife]
#945642
03/08/11 06:45 PM
03/08/11 06:45 PM
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Joined: Jun 2009
Posts: 429
Sherman Texas
The Shocker
OP
mopar
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OP
mopar
Joined: Jun 2009
Posts: 429
Sherman Texas
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Quote:
Quote:
Because of the mopar short front segment of their spring slapper bars are not needed. if they worked it is because he was bandaiding something wrong. the only thing the bars do is stop the front segment from wrapping up. he could have accomplished this with just a pinion snuber. also the bars are not hard on any parts ect. mopar has the shortest front segment in the buissness. that is why we kind of make fun of some one who uses them on a mopar. as for the bars on the pickup those are just another slapper bar design they are not even close to a caltrac set up as how they work they still only stiffen the front segment. so did they work for him yes because he probably had worn out parts that alowed the spring to not plant the tire. most likley a well tuned in snubber would have given the same resaults and this thread would have not been here.
No bars on this car, Only an added leaf tothe stock springs and a snubber. 1.55/1.56 60's all day and runs 11.40's.
Are cars are real simular performance wise 60 foots are real close .I ran an 11.43 the last time i ran my car in the 1/4 and the 1/8 mile time was a 7.23 on that pass (which was a new best for the car in the 1/8 and 1/4 ).I set a new best in the 1/8 Saturday of 7.17 ,so im guessing if i had ran it all the way through the 1/4 on that pass i woulda been in the low to mid 11.30's ...
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