SloMo Launch vid
#800340
09/13/10 05:31 PM
09/13/10 05:31 PM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
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A shed in England
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'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: SloMo Launch vid
[Re: Tig]
#800341
09/13/10 06:00 PM
09/13/10 06:00 PM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
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A shed in England
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Here's another one. http://www.youtube.com/watch?v=4-w-tGU0NksAny tips on how to get rid of the wheel wobble Cheers.
'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: SloMo Launch vid
[Re: Tig]
#800342
09/13/10 06:14 PM
09/13/10 06:14 PM
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Joined: Mar 2009
Posts: 1,058 bigfork mn
dragram440
super stock
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super stock
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bigfork mn
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I looks like it launches really awsome!!! The wheel wobble is definatley scary. Is that a whole hood on there or did you put the scoop on? I am looking for something taller then a stock one to clear my setup.
Last edited by dragram440; 09/13/10 06:19 PM.
67' charger 499 RB
10.57 at 127
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Re: SloMo Launch vid
[Re: Tig]
#800343
09/13/10 06:20 PM
09/13/10 06:20 PM
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Joined: Sep 2009
Posts: 70 New Jersey
Randy514
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New Jersey
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Bump-steer usually attributed to stock suspension geometry woes. Our car does it but not as severe.. or maybe it does and I haven't looked at a slow motion video. I know its noticeable to the naked eye.
As the suspension drops on lift the geometry of the suspension gets out of wack with the un-equal length control arms and throws all the alignment angles out of wack. I think the common cure is aftermarket suspension and rack and pinion steering
Looking at the video it looks like your toe and camber are WAY out at the end of the second video Maybe have someone familiar with aligning race-cars set up the angles with the appropriate lift (in the front end at speed) Couldnt hurt Randy
Last edited by Randy514; 09/13/10 06:24 PM.
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Re: SloMo Launch vid
[Re: dragram440]
#800344
09/13/10 06:22 PM
09/13/10 06:22 PM
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Joined: Aug 2004
Posts: 2,128 sweden
sshemi
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top fuel
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sweden
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Some more toe in maybe? Looks like you could go a little stiffer on rear shock extension..or slow the front end rise down a bit. But those launches look really cool, exept for the front wheel wobble.
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Re: SloMo Launch vid
[Re: Randy514]
#800345
09/13/10 06:26 PM
09/13/10 06:26 PM
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Joined: Feb 2004
Posts: 6,257 acworth / N. georgia - south e...
cheapstreetdustr
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actually moving the tierod end can fix this.. and poly bushings in the LCA's and strut rods. that is alot of wobble. id swear the lca is flexing...lol....
i might suggest trying a tad more air psi in the rear tires. see if the 60ft drops...? cheapst
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured [image][/image]
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Re: SloMo Launch vid
[Re: cheapstreetdustr]
#800346
09/13/10 06:37 PM
09/13/10 06:37 PM
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Joined: Feb 2009
Posts: 1,019 Finland
mafo
super stock
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super stock
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Finland
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for me it helped to limit front end travel
casio exilim camera?
-65 Valiant,420", all motor,2700#, dot tires, 8,42 @ 160,2
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Re: SloMo Launch vid
[Re: cheapstreetdustr]
#800347
09/13/10 06:49 PM
09/13/10 06:49 PM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
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A shed in England
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Thanks for the reply's The Hood is a old MAS piece from years ago, the scoop was modified to make it 3 inches taller. Car has poly LCA bushes fitted, the strut bars are dynamic ones from CAP as are the Upper control arms. I set the car up with a camber and castor gauge, after about 5 hours we got 5 degrees of castor zero camber and zero toe at + 1 inch, Tie rod ends were heated and moved up to level the tie bars with the LCA but thats not to say to say stuff hasn't moved since. I've seen the wheels move on a normal speed camera it doesn't look that much, and the steering wheel wobbles briefly on touchdown. After seeing these vids I'll be checking stuff out pretty soon. We were running a new brand of tyre, they seemed to have a stiffer sidewall than what we usually used. We were upping the air 1/4 lb per pass till we hit the sweet spot. The vids where from earlier in the day. Ended up with 12.5 psi but I think they could probably go more. Rear shocks are on max ext damping (9 ways) I agree that slowing the front rise will help. Looking to upgrade the front shocks over the close season. Sorry I've got no idea what camera the guy was using, makes for an exceptional tuning tool though. Thanks again
'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: SloMo Launch vid
[Re: Big Squeeze]
#800349
09/13/10 07:42 PM
09/13/10 07:42 PM
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Joined: May 2004
Posts: 2,864 IN
Irun5snd8th
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Definitely saw that. Looks like it could use a bit stiffer compression in the shocks. Amazing video! What kind of camera/ video editing did that?
AFCO, Rons Fuel Injection sponsored Dodge Challenger
Mention Street Lethal Motorsports
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Re: SloMo Launch vid
[Re: rowin4]
#800352
09/13/10 07:59 PM
09/13/10 07:59 PM
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Joined: Mar 2005
Posts: 2,489 Pacifica, CA
Devilbrad
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Quote:
First thing I would check is the idler arm to see if the bushing is shot. Interesting video, really can learn allot with that slow motion camera .
If you watch the second vid, you can see both front tires move in same direction at same time. Something is definitly worn in the steering if he isn't feeling much in the wheel.
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Re: SloMo Launch vid
[Re: Devilbrad]
#800353
09/13/10 10:12 PM
09/13/10 10:12 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Posts: 9,225
Charleston
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Quote:
Quote:
First thing I would check is the idler arm to see if the bushing is shot. Interesting video, really can learn allot with that slow motion camera .
If you watch the second vid, you can see both front tires move in same direction at same time. Something is definitly worn in the steering if he isn't feeling much in the wheel.
i seen that too. wonder if a very sloppy gear box could cause that. both videos are awesome. Tig, your car is awesome
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
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Re: SloMo Launch vid
[Re: Tig]
#800354
09/13/10 11:47 PM
09/13/10 11:47 PM
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Joined: Aug 2003
Posts: 43,287 Bend,OR USA
Cab_Burge
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I Win
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Bend,OR USA
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Tig, your car is doing what the SS/AA car do, maybe Jared or lordan or one of Holtons will chime in on what they do to limit that wobble. I agree with slowing down the amount of rise on the wheelie and the resulting collision with the ground making things bend and wear I'm a firm beliver in getting both front tires off of the ground the least amount possible,no big wheelies for me BTW, your car is leaving very well, stiffen up and or slow down the suspension extensions and the car will probally go quicker and faster What size, brand and compuond are the new tires? Inquiring minds want to try them
Last edited by Cab_Burge; 09/14/10 03:03 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: SloMo Launch vid
[Re: Big Squeeze]
#800356
09/14/10 02:47 AM
09/14/10 02:47 AM
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Joined: Sep 2009
Posts: 1,805 ky hills
thehemikid
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Quote:
Quote:
Here's a vid from the last meeting. http://www.youtube.com/watch?v=91dmTS-UvDc
Did you guys see how the rear of the body goes up and down a few times while the front tires are in the air???
...I may be wrong, but looking at that vid, at the (rear tire) air gap above the tire, ...once it reached full separation it doesn't change much. most of the springing is the rear "Tire" itself. After the 1st spring there's a slight spin looks like to me.
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Re: SloMo Launch vid
[Re: 540DUSTER]
#800358
09/14/10 03:57 AM
09/14/10 03:57 AM
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Joined: May 2004
Posts: 952 Stockholm, Sweden
MrSixpack
super stock
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super stock
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Stockholm, Sweden
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My car has done the same thing since early 1970'ths and still does it. I don't like it and don't know how to fix it, as I have to use the stock frontend parts. Look at this T&T video from 1977 or 78. Wheelie
1970 Super Stock Challenger ex. Paul Rossi 1968 Dodge Dart GT 340 1968 Dodge Charger /6 3 speed manual 1966 Chrysler 300 Loaded 1968 Dodge Charger R/T 440
1968 Mini Cooper
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Re: SloMo Launch vid
[Re: MrSixpack]
#800359
09/14/10 08:26 AM
09/14/10 08:26 AM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
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Posts: 2,933
A shed in England
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Thanks for the reply's. I don't know what camera the guy is using, he's the official track photographer, Googling Blackett photography may throw some light on this. I'm going to replace the steering box and Idler arm over winter. They are the only thing I haven't changed on the front suspension. Front shocks are on the cards, maybe rears if finance can stretch to it. I also want to put a bigger cam in the motor too The tyres are Toyo 10.5 w's. Similar in section width and Circ to the old 29.5 x 10.5 M/T's we had but with an 11.2 inch tread. http://www.toyo.co.uk/productdetail.php?identity=products&product_id=55 Ideally I would like a bit more shackle angle on the rear, we would have to fab some longer hangers and relocate them further forward. It's been on the "to do" list for some time The car brakes strieght, with a tail wind we terminal @ 141+. Have to stand on the brakes hard sometimes if I've been looking at gauges . Seems I'm not alone with this "wobble". Does it cost some ET? Thanks again for the help guys
'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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