Since I started to share my videos a lot of members help me a lot to improove my 60ft. I started from 1.79 and now I'm doing 1.44 of 60ft.
Car still having some boucing at the launch and I would like some opinions how to fiz that. I'm posting a video (Sorry, not a good quality) and I will share what is the suspension configuration.
Footbrake, 4200 converter, Calvert Split monoleaf, sliders, hoosier stiff sidewall 28x10.5 (12psi), Viking DA front and rear, slant six torsion bars, front end travel over 5".
Front Shocks: Compression: 15 Rebound: 2
Rear Shocks: Compression: 5 Rebound: 10
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
Stiffen up the fronts all the way and see if that helps your sixty foot times or not. It is bouncing due to the shocks topping out, I think I would also try stiffening up the rears after getting the fronts set up the best you can
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
My car is setup almost exactly like yours in the suspension area and it runs about the same times. I have an R1 block with W2 heads so the nose weight is likely heavier than yours. I recently went from old lakewood 90/10 shocks in the front to Viking DA shocks. With the old setup you could see it unload the rear tire right when the front topped out which was very quickly. Moving to the DA shocks fixed it and my first 3 passes ad the same 60ft of 1.4500(EXACTLY the same 60). I started with them set at 4 on the rebound and 12 on compression and I currently have them set at 5 and I have not tried anything more stiff yet but I plan to.
I don't know about going full stiff but you might try 4-6 and go from there. If someone can get on the starting line and do a slow motion video with an Iphone you can see soooo much more of what the car is doing.
The slow motion on this video starts a little late but the only change was the front shocks. I had the compression to loose on this pass and it really crashed the front down, I moved it up to 12 and it is way better. https://youtu.be/1YJX0QfQKWE
If the Cal-Trac bars aren't in the lower hole of the front bracket, I'd put them there. I agree w/ stiffening the rebound on the front shocks, but I'd go about half way.
Whoowww. Very impressive how your car launch much better from the first to the second video. I will try a close setup as yours. Looks like that your and cab_burge ideas are in the same way. I really appreciate.
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
Thanks Man! Really appreciate your kind words. I'm running with Assassin Bars and them are slightly angled down on the front bracket. I will post a Picture that you can see better.
'77 Brazilian Dodge Charger R/T - Street Car Footbrake, Pump Gas, SB Mopar 360" N/A 3300lbs, Leaf Spring + Assassin Bars Best 1/8 mile ET 1.50 60' / 4.31 330' / 6.73@102.54mph
I would agree that it is acting like a dog on a chain, either shock, spring or something in the suspension is running out of travel before the launch has used up the energy. Just like a running dog that reaches the end of its chain. Don't forget to look at things like tight ball joints and control arm bushings. And it is a really neat looking car, I guess it is based on the A body mopar, like we had in the USA, just built in South America ?
