New best 1/4 Friday night
#3148781
06/05/23 09:06 AM
06/05/23 09:06 AM
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Joined: Jan 2003
Posts: 13,380 Marion, South Carolina [><]
an8sec70cuda
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 13,380
Marion, South Carolina [><]
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Went to Darlington Friday night for test and tune. After having issues at Rockingham last month. I wanted to see if I had a decent setup to keep the front down and go faster. My first pass off the trailer was an 8.74 @ 156.4 mph w/ a 1.35 sixty foot. A personal best 1/4 mile ET for me! The front only came up about a 8-12" and carried them out nicely. Not exactly sure what tripped the 60' beam. The car felt soft down low to me on the 1st run, so I decided to bring the nitrous in a little quicker for the 2nd run. Instead of a .4 sec delay and a 1.4 sec ramp, I shortened it to a .2 sec delay and 1.1 sec ramp. This resulted in a big wheelstand. It came down nice and smooth after I pedaled it and it ran 8.94 @ 155.5 mph w/ a 1.45 sixty foot on the back tires. So for the 3rd pass I lengthened the ramp back out to 1.45 sec, same .2 sec delay. This resulted in another big wheelstand, but got the oil pan on the way back down. No other damage thankfully.
I have some ideas on what to do next and I may have been thinking about it all wrong. Going to talk it over w/ people who have been faster and know more than me, lol. I have been quicker in the 1/8 mile than what it ran on the 8.74 pass, so I know it has more in it. Stopping this sled (3800 lbs) from 156 mph was interesting. It did OK, but not something I want to do much of. This car really needs a lot of updates (parachute, brakes, chassis, etc.) if I continue this route, but it isn't as much of a problem running 1/8 mile only. The front shocks are DA Vikings and are set fully tight on rebound.
Here's a pic from the 2nd run. Somewhere over 100' out. It came down around 200' out or so. There are videos on Facebook that a friend got of all 3 runs, but I don't know how to link them here (I'm at work). The last pics are the damage from the 3rd run's landing. The 440 source fab'd pan help up pretty well I thought.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: New best 1/4 Friday night
[Re: an8sec70cuda]
#3148801
06/05/23 10:12 AM
06/05/23 10:12 AM
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Joined: Feb 2003
Posts: 4,953 Houston, Texas
TheOtherDodge
master
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master
Joined: Feb 2003
Posts: 4,953
Houston, Texas
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Went to Darlington Friday night for test and tune. After having issues at Rockingham last month. I wanted to see if I had a decent setup to keep the front down and go faster. My first pass off the trailer was an 8.74 @ 156.4 mph w/ a 1.35 sixty foot. A personal best 1/4 mile ET for me! The front only came up about a 8-12" and carried them out nicely. Not exactly sure what tripped the 60' beam. The car felt soft down low to me on the 1st run, so I decided to bring the nitrous in a little quicker for the 2nd run. Instead of a .4 sec delay and a 1.4 sec ramp, I shortened it to a .2 sec delay and 1.1 sec ramp. This resulted in a big wheelstand. It came down nice and smooth after I pedaled it and it ran 8.94 @ 155.5 mph w/ a 1.45 sixty foot on the back tires. So for the 3rd pass I lengthened the ramp back out to 1.45 sec, same .2 sec delay. This resulted in another big wheelstand, but got the oil pan on the way back down. No other damage thankfully.
I have some ideas on what to do next and I may have been thinking about it all wrong. Going to talk it over w/ people who have been faster and know more than me, lol. I have been quicker in the 1/8 mile than what it ran on the 8.74 pass, so I know it has more in it. Stopping this sled (3800 lbs) from 156 mph was interesting. It did OK, but not something I want to do much of. This car really needs a lot of updates (parachute, brakes, chassis, etc.) if I continue this route, but it isn't as much of a problem running 1/8 mile only. The front shocks are DA Vikings and are set fully tight on rebound.
Here's a pic from the 2nd run. Somewhere over 100' out. It came down around 200' out or so. There are videos on Facebook that a friend got of all 3 runs, but I don't know how to link them here (I'm at work). The last pics are the damage from the 3rd run's landing. The 440 source fab'd pan help up pretty well I thought. Nice runs! Are you running biased slicks or radials?
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Re: New best 1/4 Friday night
[Re: TheOtherDodge]
#3148804
06/05/23 10:15 AM
06/05/23 10:15 AM
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Joined: Dec 2013
Posts: 4,694 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,694
Wichita
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Wow, I remember when this was just a 10 second 'Cuda!
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: New best 1/4 Friday night
[Re: an8sec70cuda]
#3148810
06/05/23 10:32 AM
06/05/23 10:32 AM
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Joined: Jan 2003
Posts: 2,931 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,931
A shed in England
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Awesome work . Just wondering what rear gear and controller are you using ? I have an old(ish), NOS (Holley) 2 stage controller with a little screen. I haven't used it yet as we were looking to do some upgrades before fitting the N2O (9" and TH400 type box) along with the 655 but it looks like it should do the job. We're hoping to go mid 8's with it all scienced out but who knows
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: New best 1/4 Friday night
[Re: Tig]
#3148821
06/05/23 11:19 AM
06/05/23 11:19 AM
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Joined: Aug 2003
Posts: 4,690 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,690
On the parachute mount
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HMMMMM , less first gear in the trans?? move some weight forward? SOunds great, congrats on a bad a$$ street car
....BAD A$$ STREET CAR.....
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Re: New best 1/4 Friday night
[Re: HardcoreB]
#3148828
06/05/23 11:37 AM
06/05/23 11:37 AM
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Joined: Mar 2003
Posts: 2,521 PA
moparacer
master
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master
Joined: Mar 2003
Posts: 2,521
PA
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As far as stopping the wheelstands my vote is for revalving or replacing the front shocks.
I had my AFCO 3850s revalved a couple years ago after I put mine on the bumper, and made a milodon pan into a low profile just like you did, and I can literally lock the front end down to zero movement.
67 Barracuda street/bracket car 11.27-119 68 Dart 502 BB 8.70s-152 414 cid SB Dragster 7.65-174
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Re: New best 1/4 Friday night
[Re: moparacer]
#3148831
06/05/23 11:53 AM
06/05/23 11:53 AM
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Joined: Feb 2004
Posts: 34,937 S.E. South Dakota !
bigdad
Still Posting A Lot
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Still Posting A Lot
Joined: Feb 2004
Posts: 34,937
S.E. South Dakota !
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nice pass , that is a big wheel stand ..
The lips of fools bring them strife, and their mouths invite a beating.Proverbs 18:6
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Re: New best 1/4 Friday night
[Re: bigdad]
#3148896
06/05/23 02:45 PM
06/05/23 02:45 PM
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Joined: Jan 2003
Posts: 13,380 Marion, South Carolina [><]
an8sec70cuda
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 13,380
Marion, South Carolina [><]
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Jerico...yessir, it's on the to do list. TheOtherDodge...thanks! I'm on 295-65 radials. GY3...that was an expensive 2 seconds, lol. Tig...3.54 gear and a Leash progressive. n20mstr...there are a few things I'm considering changing and trying. I'll get a plan together soon. Have a lot going on this summer, so I'm not in a hurry to get back to the track. Sometime in the fall probably. HardcoreB... moparacer...When I bought these shocks I don't think Viking offered their "crusader" valving for their front shocks. I asked about it. Apparently now they do have stiffer valving for the fronts they sell. I need to give them a call. This last week was the first time getting a good pass w/ the shocks fully tight. bigdad...thanks. Hopefully it won't happen again, lol.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: New best 1/4 Friday night
[Re: rickraw]
#3148940
06/05/23 04:24 PM
06/05/23 04:24 PM
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Joined: Jan 2003
Posts: 17,904 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,904
S.E. Michigan
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Those videos sure got my attention...that car is more badass than ever.
Rich H.
Esse Quam Videri
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Re: New best 1/4 Friday night
[Re: John Burdine]
#3148983
06/05/23 07:06 PM
06/05/23 07:06 PM
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Joined: Jul 2018
Posts: 171 Sticky South
Rodenteliminator
member
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member
Joined: Jul 2018
Posts: 171
Sticky South
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Does that thing ever blow the tires off at the hit ? It looks like it always goes up, I am sure you have checked the weight bias, and as far as wheelie bars my guess is the way it leaves now it would hit the bars hard and unload it. Doug
Sorry honey I spent the rent
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Re: New best 1/4 Friday night
[Re: B1duster]
#3149038
06/06/23 04:59 AM
06/06/23 04:59 AM
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Joined: Sep 2005
Posts: 623 Deep DEEP SOUTH
LAD 524
mopar
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mopar
Joined: Sep 2005
Posts: 623
Deep DEEP SOUTH
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Chip awesome on the new PB, bummer on the pan. I did'nt realise you went to a 3.54, when did you ditch the 4.10s, when you went on the bottle ? Just wondering what RPM you're leaving at and what the rear shock setting are? Gots to find another way to keep your front end down, the nitrous controller/ tune seemed to help but other than that and the shock settings (which I'm sure you've played with) what else can you try changing .....Cal Trac bars for IC changes, wheelie bars ? Something else?
Last edited by LAD 524; 06/06/23 05:00 AM.
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Re: New best 1/4 Friday night
[Re: dvw]
#3149080
06/06/23 09:55 AM
06/06/23 09:55 AM
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Joined: Aug 2003
Posts: 4,690 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,690
On the parachute mount
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what you have to remember, this is a radial tire car. Radials Dead Hook , that means the car wants to pitch rotate or go forward..... this car seems to want to pitch rotate. It needs more weight on the front and less SLR , thats it. Honestly with a radial tire the travel and tight shock only helps but its not going to 100% fix this wheelie problem
THis car needs , LESS SLR, and more weight on the front. THEN he can really get agressive on the ramp and go LOW 8's or mid to low?5's in the 1/8
Powerglide , or leave in 2nd gear, (2nd gear leave will require a converter change) Move the battery forward, move the fuel cell up front, sneak the motor forward 3/4 of an inch, lighten the rear of the car, fiberglass trunk lid, fibergalss rear bumper anything to change the weight bias will help
Last edited by n20mstr; 06/06/23 09:59 AM.
....BAD A$$ STREET CAR.....
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Re: New best 1/4 Friday night
[Re: n20mstr]
#3149090
06/06/23 10:37 AM
06/06/23 10:37 AM
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Joined: Jan 2003
Posts: 13,380 Marion, South Carolina [><]
an8sec70cuda
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 13,380
Marion, South Carolina [><]
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rickraw...I really don't want to put wheelie bars on it. Some of the classes I run don't allow them. Al...Yes, I guess I didn't realize just how well the car worked on the first run. All I saw was the slow (according to the numbers on the slip) 60 foot and immediately wanted to improve on that. Zippy...thankyou! John Burdine...Thanks! I've been really wanting to see a 1.2x 60 foot. Closest I've been is a 1.300. Rodenteliminator...It hasn't done that in a while. As long as the track isn't decent, it'll hook. Not much gear, real tight converter, and leaving on motor...it's not making much right at the hit to get things planted. Then roll the power in. B1duster...a skid plate might prove useful, lol. I'm leery of using limiters up front even though I do have some in the trailer to try. My thinking is if it still wheelies and comes down it'll have that much less cushion and really tear stuff up. But I know it's one of those things I just have to try and see and no one can tell me what's gonna happen. LAD 524...Yes, I switched to the 3.54s not long after going to nitrous. It was completely unmanageable w/ the 4.10s. It just killed the tires or tried to stand straight up on less nitrous. Leaving on the transbrake at 3k rpm. Rear shocks are 8 compression, 5 rebound...out of 18. 18 being the stiffest. I admit I haven't changed the rear shock settings after I got my initial tuning done when they were new. All I've changed are the front rebound settings. Gradually getting tighter until now I'm maxed out. I should try tightening the rear rebound, but I don't want to make too many changes at once. Plus I felt the front would offer more benefit from changes. DVW...I will contact Viking and see if they can revalve my front shocks. Might as well see if that is even an option. I will also probably be moving the battery back up front. Thanks for the oil pan help too. I should have it back together this weekend. n20mstr...I agree the SLR is a problem. It's also something I may just have to live with. I'm not changing transmissions. I may end up putting a 2nd gear leave VB in this 727, but a 1.45 gear w/ a nearly 3800 lb car might not work too well. There's also the possibility of changing to a 3.23 rear gear if Dr Diff ever has those available. Yes, I still have a Dana and no, I'm not changing to a 9". I'm not being stubborn or being a "purist". I'm being cheap b/c I simply don't care to spend a ton of money on this car anymore. I'll work w/ what I have within reason. I have more family oriented things I'd rather spend money on. If I had the forethought way back when, it would already have a glide and a 9" under it. I've been to the track 5 times in the last 3 years. Last year I only went to the track once and had ignition problems that kept me from making a good pass all day. Not a lot of runs to figure it out even though I've had this setup quite a while. I'll make some small changes and see what happens. If it doesn't go much faster, so be it.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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