Front spoiler for 70 Duster drag car (130mph) - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech Front spoiler for 70 Duster drag car (130mph)

Print Thread

Page 2 of 3

1

2

3

Re: Front spoiler for 70 Duster drag car (130mph) [Re: deaks] #1596325 03/22/14 07:35 PM 03/22/14 07:35 PM
Joined: Feb 2011 Posts: 4,302 Nebraska 72Swinger master
72Swinger master Joined: Feb 2011 Posts: 4,302 Nebraska	A problem alot of cars have is to much rake which also has the side effect of giving you way less caster. Caster is probably the largest contributor to high speed stability out of all alignment settings. Lowering the front will not help this condition whatsoever. Mopar to the bone!!!

Re: Front spoiler for 70 Duster drag car (130mph) [Re: MR_P_BODY] #1596326 03/22/14 08:10 PM 03/22/14 08:10 PM
Joined: Aug 2003 Posts: 136 Dallas, TX 4 440Brian OP member
440Brian OP member 4 Joined: Aug 2003 Posts: 136 Dallas, TX	Thanks for all the responses. I think I'll try lowering the front end and checking the alignment/steering linkage first. The car is back halved so I can adjust the rear height easily. I run 8 psi in the slicks. The front suspension has been updated to disc brakes by swapping everything over from a 73 A body. It does seem like the front end is sitting high as I go down the track. I didn't know it was possible to block off the grille and still keep it cool. I added a whole car pic so you can see how it sits. 8084498-DSC00006(1)(640x271).jpg (245 downloads)

Re: Front spoiler for 70 Duster drag car (130mph) [Re: 440Brian] #1596327 03/22/14 08:20 PM 03/22/14 08:20 PM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	when you block off your grille, make sure it is flush with the front edge of your car. this leaves a large area for the radiator fan to pull air from behind the new grille panel, as well as improving aerodynamics. my car also uses drop spindles on the front & at speed the car really hunkers down onto the track. the front spoiler in my pic is actually off a Ford but i cut & modified it to fit my car. 8084508-DSC08349.jpg (277 downloads)

Re: Front spoiler for 70 Duster drag car (130mph) [Re: 440Brian] #1596328 03/22/14 08:41 PM 03/22/14 08:41 PM
Joined: Feb 2005 Posts: 20,160 PA. pittsburghracer "Little"John
pittsburghracer "Little"John Joined: Feb 2005 Posts: 20,160 PA.	Quote: Thanks for all the responses. I think I'll try lowering the front end and checking the alignment/steering linkage first. The car is back halved so I can adjust the rear height easily. I run 8 psi in the slicks. The front suspension has been updated to disc brakes by swapping everything over from a 73 A body. It does seem like the front end is sitting high as I go down the track. I didn't know it was possible to block off the grille and still keep it cool. I added a whole car pic so you can see how it sits. Look at your front tire height and look at mine. I'm running exactly 130mph right now and should be a hair over 150 next year and still don't think I will need a front spoiler. Also I'm running 14-32 around 10.5 pounds. At 8 it didn't hook or handle as well. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Front spoiler for 70 Duster drag car (130mph) [Re: 440Brian] #1596329 03/22/14 08:47 PM 03/22/14 08:47 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	Quote: Thanks for all the responses. I think I'll try lowering the front end and checking the alignment/steering linkage first. The car is back halved so I can adjust the rear height easily. I run 8 psi in the slicks. The front suspension has been updated to disc brakes by swapping everything over from a 73 A body. It does seem like the front end is sitting high as I go down the track. I didn't know it was possible to block off the grille and still keep it cool. I added a whole car pic so you can see how it sits. theres your problem, the rear is setting lower that the front. looks like the front is at least 5" to high. looks like the wheel is leaning in at the top just setting there. lower that thing and reset the alignment. and you don't need to block off the grill

Re: Front spoiler for 70 Duster drag car (130mph) [Re: 440Brian] #1596330 03/22/14 10:39 PM 03/22/14 10:39 PM
Joined: Nov 2009 Posts: 3,410 Belpre,Ohio C CHAPPER master
CHAPPER master C Joined: Nov 2009 Posts: 3,410 Belpre,Ohio	Quote: Thanks for all the responses. I think I'll try lowering the front end and checking the alignment/steering linkage first. The car is back halved so I can adjust the rear height easily. I run 8 psi in the slicks. The front suspension has been updated to disc brakes by swapping everything over from a 73 A body. It does seem like the front end is sitting high as I go down the track. I didn't know it was possible to block off the grille and still keep it cool. I added a whole car pic so you can see how it sits. That doesn't happen to be a radial tire on the front with a bias ply slick on the rear...? My A-body didn't drive good with a radial/bias ply combination. Others have had no problems, but I sure did. I would have to agree with some of the others, the front looks high to me too. Side pic of mine for comparison. 8084642-freddy'stoy005.jpg (214 downloads) If you like drag racing, support your local track.

Re: Front spoiler for 70 Duster drag car (130mph) [Re: CHAPPER] #1596331 03/22/14 11:12 PM 03/22/14 11:12 PM
Joined: Aug 2003 Posts: 43,127 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,127 Bend,OR USA	My 1971 Duster had issues when I mixed radials and bias plys at first, I ended up finding that I had a bad idler arm, new out of the box My car ran 134+ mph in the 1/4 a bunch of times, no issues with a good alignment and tight steering components. Low rear tire pressures can and will make your butt cheeks pucker when you let off or try to steer it when it is wondering around in high gear I like to run, find, the highest amount of air pressure in the rear tires I can run without spinning them on the starting line for that very reason A freind of mine has added a partial spoiler to his 170 BB Duster, he ran it the width of the front sub frames only in front of the radiator to block air going into the front suspension and K member. He picked up almost a tenth in the 1/4 and some MPH He runs low tens and high nines also with no issues on steerng it on the other end in the 1/4 mile He runs ladder bars on leaf springs with sliders, mine was ladder bars and coil overs with a diagonal link I hope you find out what is causing it , let us know what you find Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Front spoiler for 70 Duster drag car (130mph) [Re: CHAPPER] #1596332 03/22/14 11:12 PM 03/22/14 11:12 PM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	if your ladder bars are to high in the front that will make the car unstable also. My car has a open grille and I have been faster than 175 with no issues at all. I have recently added a 1969 Camaro front spoiler to help hide the belly pan and blower and saw no difference. BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Front spoiler for 70 Duster drag car (130mph) [Re: bigtimeauto] #1596333 03/22/14 11:28 PM 03/22/14 11:28 PM
Joined: Aug 2003 Posts: 776 Eastern WA P ProStock1320 super stock
ProStock1320 super stock P Joined: Aug 2003 Posts: 776 Eastern WA	Quote: I have recently added a 1969 Camaro front spoiler to help hide the belly pan and blower Pics?

Re: Front spoiler for 70 Duster drag car (130mph) [Re: ProStock1320] #1596334 03/22/14 11:30 PM 03/22/14 11:30 PM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	Quote: Quote: I have recently added a 1969 Camaro front spoiler to help hide the belly pan and blower Pics? BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Front spoiler for 70 Duster drag car (130mph) [Re: bigtimeauto] #1596335 03/23/14 01:04 AM 03/23/14 01:04 AM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	Quote: Quote: Quote: I have recently added a 1969 Camaro front spoiler to help hide the belly pan and blower Pics? not much gain with only a couple of inches, maybe a few more might make a difference.

Re: Front spoiler for 70 Duster drag car (130mph) [Re: rebel] #1596336 03/23/14 01:08 AM 03/23/14 01:08 AM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	Quote: Quote: Quote: Quote: I have recently added a 1969 Camaro front spoiler to help hide the belly pan and blower Pics? not much gain with only a couple of inches, maybe a few more might make a difference. really no need, no more quarter for this car and its runs 155 in the 1/8th BB, TT5,Procharged 3300lb Street Car 4.79/154

Re: Front spoiler for 70 Duster drag car (130mph) [Re: 440Brian] #1596337 03/23/14 01:23 AM 03/23/14 01:23 AM
Joined: Jan 2003 Posts: 11,709 Portage,michigan B B3422W5 I Live Here
B3422W5 I Live Here B Joined: Jan 2003 Posts: 11,709 Portage,michigan	Quote: Thanks for all the responses. I think I'll try lowering the front end and checking the alignment/steering linkage first. The car is back halved so I can adjust the rear height easily. I run 8 psi in the slicks. The front suspension has been updated to disc brakes by swapping everything over from a 73 A body. It does seem like the front end is sitting high as I go down the track. I didn't know it was possible to block off the grille and still keep it cool. I added a whole car pic so you can see how it sits. I would put some air in your near flat rear tires. A tubbed car with big tires going 130 mph should hook easily with WAY more air in the rears. Dragging anything down the track with flat tires will result in ill handling. I would sort out why you can't/ don't run more air before I did anything else. 69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8

Re: Front spoiler for 70 Duster drag car (130mph) [Re: B3422W5] #1596338 03/23/14 02:39 AM 03/23/14 02:39 AM
Joined: Jan 2003 Posts: 6,591 Canton, Ohio S Sport440 master
Sport440 master S Joined: Jan 2003 Posts: 6,591 Canton, Ohio	Its not a spoiler issue for sure. Your rear slick psi 8# is way to low and your front end is set to high not helping things. Get your psi up to 12+ or so and lower that front end. Realign and see how it handles. Also check your front end componets for slop.

Re: Front spoiler for 70 Duster drag car (130mph) [Re: Sport440] #1596339 03/23/14 05:18 AM 03/23/14 05:18 AM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	i don't consider 8 psi as low. over the years of using the same sized slick, (32x14 with stiff sidewall), i found 8-8.5 optimum pressure for my car, (2959lbs with my fat ass in the chair). i was running 12 psi when i started but found i was running the middle of the slick bald before the sides were loosing all their depth dots. i went lower over the next few seasons settling into the 8's with no adverse affect in top end handling, if fact my 60's improved. when you change to new slicks, cut your old ones open & measure the thickness across the middle, you could be quite surprised.

Re: Front spoiler for 70 Duster drag car (130mph) [Re: bigtimeauto] #1596340 03/23/14 12:19 PM 03/23/14 12:19 PM
Joined: May 2004 Posts: 12,383 Taxes & Virus's R-US, NY Dragula I Live Here
Dragula I Live Here Joined: May 2004 Posts: 12,383 Taxes & Virus's R-US, NY	Quote: Quote: Quote: I have recently added a 1969 Camaro front spoiler to help hide the belly pan and blower Pics? Am I the only idiot that noticed your blower isn't a side slinger anymore like all the pics you normally post? You owe me a reply on the other site you know.... '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: Front spoiler for 70 Duster drag car (130mph) [Re: Dragula] #1596341 03/23/14 12:26 PM 03/23/14 12:26 PM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	thats not a blower it's a pic of one on his front tag plate

Re: Front spoiler for 70 Duster drag car (130mph) [Re: rebel] #1596342 03/23/14 12:28 PM 03/23/14 12:28 PM
Joined: Jul 2005 Posts: 1,301 Penna 7 70satelliteguy pro stock
70satelliteguy pro stock 7 Joined: Jul 2005 Posts: 1,301 Penna	"I don't consider 8 psi as low" Rebel at 2900 race weight that may be true but I know that my car at 3600 race weight is all over the track on top end at 8 psi. I don't think we know what his car weighs going down the track at 130 440 Brian how much does it weigh with you in it??? Last edited by 70satelliteguy; 03/23/14 12:31 PM.

Re: Front spoiler for 70 Duster drag car (130mph) [Re: 70satelliteguy] #1596343 03/23/14 12:42 PM 03/23/14 12:42 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: "I don't consider 8 psi as low" Rebel at 2900 race weight that may be true but I know that my car at 3600 race weight is all over the track on top end at 8 psi. I don't think we know what his car weighs going down the track at 130 440 Brian how much does it weigh with you in it??? Very true... its about the weight.... I run 7 psi on my car but at 2400# and its totally fine.. but a car at 3600 would be squirming all over on top end.. but I dont know his race weight.... weight VS tire size makes a BIG difference

Re: Front spoiler for 70 Duster drag car (130mph) [Re: Dragula] #1596344 03/23/14 03:01 PM 03/23/14 03:01 PM
Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA bigtimeauto Trophy Winner
bigtimeauto Trophy Winner Joined: Jun 2007 Posts: 2,646 Plymouth Meeting, PA	Quote: Quote: Quote: Quote: I have recently added a 1969 Camaro front spoiler to help hide the belly pan and blower Pics? Am I the only idiot that noticed your blower isn't a side slinger anymore like all the pics you normally post? You owe me a reply on the other site you know.... I made a bunch of new stuff for a customer so I make changes to my car so theirs can be plug and play. I still run the front license plate when I drive it around the street, pits and to the lanes just take it off when we make a pass. Reply? BB, TT5,Procharged 3300lb Street Car 4.79/154

Page 2 of 3

1

2

3

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1