This is for all of those that dont think slapper bars work on Mopars.I ran the Dart today and had my best 60' of 1.60 flat with the slapper bars i got off craiglist for $30.00.Notice in the second vid how the whole car lifts front and back ,and the rearend slams down hard.The track sucked for traction IMO,but i still was yanking both front wheels about 3 inches in the air all day long (first time to get the wheels up on it ever).Not bad for 4.10 gears and a high first geared Powerglide ,behind a 10 to 1 smallblock. .Time for sum more motor and gears.

http://www.youtube.com/watch?v=kWfN9ajAHm8

http://www.youtube.com/watch?v=i3qtHxyYv-g

Cool. I think the whole 'slapper bars don't work on Mopars" myth was started by DC as a ploy to sell more pinion snubbers.

what 1/8 ets?

Slapper bars, will work fine until your torque output combined with final gear multiplication overpowers the short front MP spring segments leverage ability vs the cars transfer weight on said axel.

The result when that happens, is extreme rear body lift bouncing off its axel arc limits thereby creating a porpoising effect.

Your car with the powerglide vs it weight will be more forgiving with slapper bars vs a 727.

Your cars running great, but if you get much faster with more power/torque. You will see first hand the limits of the slapper bars on the short front spring segment Mopars. So far youve done great IMO With some good adjustable rear shocks you may be able to take those slapper bars to even faster ETS. mike

I'm Happy that the bars worked for you. Sometimes it is amazing what $30.00 can do for you!! But to be honest with you...if the slapper bars work, that means either your leaf springs are too soft or you shocks are worn out. The slapper bars just keep the front of the leaf springs from winding up. A good set of springs that are correct for the car should do the same thing......but $30.00 is a lot cheaper that $330.00 for a good set of springs.

Do you have jet extensions in the secondary fuel bowl? If not it sounds like you may need them

my slapper bars work and I have SS spring's, I wonder if their too soft

Its odd Sam .My 60's went down about .004,but my ET was about the same as it was before.My previous best was a 7.27 in the 1/8 before with a 1.63 60 ,but i could only muster a 7.29 with a 1.60 60 .I was having sum problems with the car wandering on the big end in both lanes all ten passes.They ground the track recently and theres not much traction on the big end .The car is also about 60 lbs heavier than the last time i ran it.I got sum of it back gutting it more,but between the rollbars ,rear fire wall ,and the heavy slapper bars its heavier .The car is deadly consistant though in the 60' .I was getting either a 1.61 or a 1.60 60 foot every pass all ten passes .Now i just need to motor her up with more cam and stiffer valve springs .Only problem i had was the tach quit working on the first pass.I kept trying to fix a wiring problem between rounds ,but it was the tach.I ended up buying one at the track from a vendor (and got raped) ,but i had to have it.It sucks not knowing what rpm your doing a burnout at ,launching at ,or trying to shift at .Car ran good though ...

very cool car but it really doesn't prove anything. we ran the same 60' in my sons chally with a pretty much stock 340. with bone stock 6cyl front and rear suspension. if you really want to prove it helps make a pass record the times and come back and take the slappers off. I'll bet you will see no difference

No extensions on the jets.In that on vid where it shows my car from the rear ,im not the car sounding like its getting in and out of the throttle its the guy in the other lane.He was having bad traction issues all day with that thing .He had a blown big block in it and it drowned mine right out in the vid ...

and I didn't see the front wheels in the air sorry

Proly had a 3 spd trans behind the 340 with lower gears as well .I proved that slapper bars can stop spring wrap ,and control wheel hop ,create lift (hence the wheelies all day),and lower your 60 foot ,plus make your car more consistant on a Mopar for $30.00(i'd have to say that either a 1.60 or a 1.61 on ten passes in a row is fairly consistant).What more is there to prove ???

and like sport said what works at your power level may not work when power is increased.

3 inches or 3 foot whats the difference.Air is air .Trust me it pulled both of them off the ground evenly a few inches.Unless about 40 people were pulling my cord .I felt the front tires hit every time as well .No it didnt get on the bumper ,but thats not the slapper bars fault.I dont have the gears, stall, or motor for that kinda show ...

Slapper bars are a cure (stiffens the front half of the leaf springs) for a problem (weak front spring halfs winding up), just like pinion snubbers BTW, is your car hesitating at all on the initial hit? If so fix that and see how much your sixty ft. times increase9lower)

Such negativity. The OP spend $30 which led to a huge improvement to his car. He can now move forward from this point ( with all the great info found here on Moparts) to replace springs and/or shocks as he deems necessary.