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UPDATE! How to race on a poor track with drag radials #3065567
08/05/22 07:15 PM
08/05/22 07:15 PM
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Canada
Kam*Kuda Offline OP
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Kam*Kuda  Offline OP
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Fairly new driver, and we have a 1/8 track that is not great prep.

I am learning and trying to get consistent
I am getting better at the light but need help on this track as my 60 changes a lot


1968 Plymouth RR
About 3500 lbs plus me at 200 lbs = 3700 approx
Ladder bars are 32 inch
Single Adjustable strange shocks with 170lbs springs


I am not experienced but on a good track its
9.6-9.7 1/4 mile times
1.48 60 foots
140-142 mph



I am racing at a pretty poor track and 60 foot at 1.6-1.7s

Radial ET Pros 15 lbs

I spin pretty bad and let off and then get back in and its fine for the rest of the 1/8

Ladder bar is in middle hole. which is parallel to the ground at 0 degrees

Suggestions have been to go to the upper home

Get a lighter spring for the shocks.



Should I leave in 2nd?

Its hard to test and tune at this track as it has no prep on those day (I have tried)






jacquie-rr-sm.jpg
Last edited by Kam*Kuda; 09/18/22 11:45 AM.

1970 Barracuda Convertible
1968 Satellite Street Strip car
1654.5 Mustang
1955 Land Rover
Re: How to race on a poor track with drag radials [Re: Kam*Kuda] #3065581
08/05/22 07:45 PM
08/05/22 07:45 PM
Joined: Mar 2005
Posts: 1,337
Chesterfield Twp. Mi.
4
493_john Offline
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493_john  Offline
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Chesterfield Twp. Mi.
Not sure about the bad track, but 9.60 on a good track with a 1.48 60ft is leaving a lot on the table. Probably should go a tenth better in the 60ft on the good track.

Re: How to race on a poor track with drag radials [Re: 493_john] #3065613
08/05/22 08:51 PM
08/05/22 08:51 PM
Joined: May 2004
Posts: 11,967
Taxes & Virus's R-US, NY
Dragula Offline
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Taxes & Virus's R-US, NY
Put big slicks on it and don't worry about it....Or, invest in traction control...Ruining a car for no reason is silly.

Last edited by Dragula; 08/05/22 08:52 PM.

'70 Cuda,...605 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 Hemi 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: How to race on a poor track with drag radials [Re: Kam*Kuda] #3065615
08/05/22 08:59 PM
08/05/22 08:59 PM
Joined: Oct 2008
Posts: 1,145
East Coast
A
A/MP Offline
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East Coast
Stock eliminator cars with good HP and 9" radials have problems hooking up on bad tracks. It can be worth -.5 on their good track ET. As you know, SE cars are well thought out when it comes to weight transfer. Have you tried uping the tire pressure until you get a better result? 2nd gear is an option.

Re: How to race on a poor track with drag radials [Re: A/MP] #3065626
08/05/22 09:22 PM
08/05/22 09:22 PM
Joined: Mar 2006
Posts: 9,048
MI, usa
dvw Offline
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Rear springs are way to stiff off the bat. Need 120-125.
Doug

Re: How to race on a poor track with drag radials [Re: dvw] #3065639
08/05/22 10:08 PM
08/05/22 10:08 PM
Joined: Jan 2003
Posts: 4,192
Canada
Kam*Kuda Offline OP
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Kam*Kuda  Offline OP
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Canada
Originally Posted by dvw
Rear springs are way to stiff off the bat. Need 120-125.
Doug


A friend suggested that as well.

We were going to corner weight the car to get a baseline


1970 Barracuda Convertible
1968 Satellite Street Strip car
1654.5 Mustang
1955 Land Rover
Re: How to race on a poor track with drag radials [Re: Kam*Kuda] #3065646
08/05/22 10:29 PM
08/05/22 10:29 PM
Joined: Aug 2003
Posts: 40,025
Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
Change them dang radials out to a decent set of bias ply tires for now twocents
Save the radials for next year or later this year after the track gets some more rubber on it twocents work
Radials on a bad track are worthless once they start to spin they go up into smoke until you let off and let them grab again shruggy
Bias ply tires may spin a 1/4 to maybe 1 and 1/2 full turn and then grab or start to grab, not go up in smoke right away.
Try them, you will probably like them scope
What size tire, brand and compound are you using now?


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: How to race on a poor track with drag radials [Re: Kam*Kuda] #3065659
08/05/22 11:13 PM
08/05/22 11:13 PM
Joined: Jan 2003
Posts: 4,192
Canada
Kam*Kuda Offline OP
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Kam*Kuda  Offline OP
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Here is a video of a race day.
I needed to learn to do a burnout
Foot Brake Launch at 2000-2200 rpm.

https://www.youtube.com/watch?v=xX3YxC0IjNE

100 percent throttle and then 42 percent and then back up


Watch till end for slo motion on suspension

Last edited by Kam*Kuda; 08/05/22 11:16 PM.

1970 Barracuda Convertible
1968 Satellite Street Strip car
1654.5 Mustang
1955 Land Rover
Re: How to race on a poor track with drag radials [Re: Kam*Kuda] #3065660
08/05/22 11:14 PM
08/05/22 11:14 PM
Joined: Jan 2003
Posts: 4,192
Canada
Kam*Kuda Offline OP
master
Kam*Kuda  Offline OP
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Test and tune

Learned a better burn out

https://www.youtube.com/watch?v=7qysZqdJRw8


1970 Barracuda Convertible
1968 Satellite Street Strip car
1654.5 Mustang
1955 Land Rover
Re: How to race on a poor track with drag radials [Re: Cab_Burge] #3065661
08/05/22 11:16 PM
08/05/22 11:16 PM
Joined: Jan 2003
Posts: 4,192
Canada
Kam*Kuda Offline OP
master
Kam*Kuda  Offline OP
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Originally Posted by Cab_Burge
Change them dang radials out to a decent set of bias ply tires for now twocents
Save the radials for next year or later this year after the track gets some more rubber on it twocents work
Radials on a bad track are worthless once they start to spin they go up into smoke until you let off and let them grab again shruggy
Bias ply tires may spin a 1/4 to maybe 1 and 1/2 full turn and then grab or start to grab, not go up in smoke right away.
Try them, you will probably like them scope
What size tire, brand and compound are you using now?


I have space for a bigger tire

315 - 60 - 15
Drag ET Pros

I need to measure and order rims


1970 Barracuda Convertible
1968 Satellite Street Strip car
1654.5 Mustang
1955 Land Rover
Re: How to race on a poor track with drag radials [Re: Kam*Kuda] #3065666
08/05/22 11:31 PM
08/05/22 11:31 PM
Joined: Mar 2006
Posts: 9,048
MI, usa
dvw Offline
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I see no separation in the rear. By watching the video the stiff rear springs are not doing you any favors. It may need the IC raised with radials.
You need to hit them harder.
Doug

Re: How to race on a poor track with drag radials [Re: dvw] #3065671
08/06/22 12:03 AM
08/06/22 12:03 AM
Joined: Jan 2003
Posts: 4,192
Canada
Kam*Kuda Offline OP
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Kam*Kuda  Offline OP
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Originally Posted by dvw
I see no separation in the rear. By watching the video the stiff rear springs are not doing you any favors. It may need the IC raised with radials.
You need to hit them harder.
Doug


yes I agree I didn't see any separation either.

Will any brand spring fit on the strange shock?

Are the radials supposed to wrinkle too?


1970 Barracuda Convertible
1968 Satellite Street Strip car
1654.5 Mustang
1955 Land Rover
Re: How to race on a poor track with drag radials [Re: Kam*Kuda] #3065680
08/06/22 01:59 AM
08/06/22 01:59 AM
Joined: Aug 2003
Posts: 40,025
Bend,OR USA
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Cab_Burge Offline
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Before changing the tires try raising the pressure up to17 or 18 lbs. and make sure you get thet tires hot, make them smoke in high gear around 6000 RPM for 3 to 15 seconds in two seconds increment up from 3 seconds to as high as 15 seconds, You'll know if the longer burn outs helps or not immediately on the launch from the starting line, don't break your neck or back tsk whistling AKA aside, a 1.50 60 ft. will hurt your back and or neck if you do not stiffen up for the launch, 1.20 60 fts. Are serious fun :hammerboogiedevil: Can you say rocket ship launches up boogie grin


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: How to race on a poor track with drag radials [Re: Kam*Kuda] #3065695
08/06/22 08:36 AM
08/06/22 08:36 AM
Joined: Mar 2006
Posts: 9,048
MI, usa
dvw Offline
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dvw  Offline
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Originally Posted by Kam*Kuda
Originally Posted by dvw
I see no separation in the rear. By watching the video the stiff rear springs are not doing you any favors. It may need the IC raised with radials.
You need to hit them harder.
Doug


yes I agree I didn't see any separation either.

Will any brand spring fit on the strange shock?

Are the radials supposed to wrinkle too?



Radials wrinkle very little if any. Without frame by frame you won't see it. Any 2 1/2" spring of the correct length for you shock will work. I'm assuming on the rear you are probably running 12" long springs. But that is a guess.
Doug

Re: How to race on a poor track with drag radials [Re: dvw] #3065702
08/06/22 09:27 AM
08/06/22 09:27 AM
Joined: Oct 2003
Posts: 11,329
W. Kentucky
justinp61 Offline
I Live Here
justinp61  Offline
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Posts: 11,329
W. Kentucky
There may be some guys that can make a radial work on a bad track, I'm not one of them though. I've been to my local track when it was bad, make one pass, then load up and come home. No point slipping, sliding and beating on my junk.

If your radials are wrinkling a lot, you've probably killed the sidewalls. I had a set of MT 325's that would wad the sidewalls up even with 21# of air in them.

Re: How to race on a poor track with drag radials [Re: justinp61] #3065727
08/06/22 11:22 AM
08/06/22 11:22 AM
Joined: Dec 2013
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Wichita
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GY3 Offline
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We did some street races with drag radials.

While not the best tire, 100 lbs. of weight over the rear bumper and 2nd gear leave allowed us to get down the worst surfaces.


'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.

Re: How to race on a poor track with drag radials [Re: GY3] #3065748
08/06/22 12:25 PM
08/06/22 12:25 PM
Joined: Aug 2003
Posts: 4,383
On the parachute mount
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n20mstr Offline
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On the parachute mount
This car runs 9.30s at 140 , any track anywhere. It’s on a 295 radial

What you need is probably a 110 or 95 rear spring . Ladder bars level or 1 or 2* up , and you need a double adjustable shock with at least 4” of travel . Loose on extension, somewhat firm or stiff on rebound . You want to smash the tire and keep it smashed , don’t let it bounce back . Front may need to be more travel and somewhat tight on extension, you want a controlled rise in the front .

The nova runs a 2.10 first with a 3.70 rear
Not sure what your rear gear is but yes a little less SLR can help

Some may not agree , but I think I have some experience with radials whistling

ECC571B6-5C40-4E7C-B455-30E9C6F7C46F.png
Last edited by n20mstr; 08/06/22 12:52 PM.

....BAD A$$ STREET CAR.....
Re: How to race on a poor track with drag radials [Re: n20mstr] #3065761
08/06/22 01:05 PM
08/06/22 01:05 PM
Joined: Oct 2015
Posts: 546
UK
rb446 Offline
mopar
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UK
As above^^^

As a marker so to speak for Bias tyre, our '69RR, less hp than you, only 690 through street muffs, mild big ci motor, big torque, 3800lbs@line, rubbish 90/10's on front, caltracs/bars, c/trac 9-ways single adj on 7 stiff, 2 turns preload on bars, 4.10's 10x29 Hoosier bias@17psi, been a best of 1.42 60 normally 1.43>1.45 and a best of 10.30@130 on a good day, normally 10.4's>5's. Lots wrong with it but respectable 60's.


1969 'Cuda 446ci, best 9.96@133.9 in 1990
1971 340 'Cuda, best 11.01@122.8 in 1987
Re: How to race on a poor track with drag radials [Re: rb446] #3065769
08/06/22 01:37 PM
08/06/22 01:37 PM
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Posts: 344
Nor here, Nor there
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Dart 500 Offline
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Nor here, Nor there
Take it to Quebec, radial guys own the track and know how to prep it

https://www.youtube.com/watch?v=FQX65E3iv24

Re: How to race on a poor track with drag radials [Re: dvw] #3065811
08/06/22 03:35 PM
08/06/22 03:35 PM
Joined: Jan 2003
Posts: 4,192
Canada
Kam*Kuda Offline OP
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Kam*Kuda  Offline OP
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Originally Posted by dvw
Originally Posted by Kam*Kuda
Originally Posted by dvw
I see no separation in the rear. By watching the video the stiff rear springs are not doing you any favors. It may need the IC raised with radials.
You need to hit them harder.
Doug


yes I agree I didn't see any separation either.

Will any brand spring fit on the strange shock?

Are the radials supposed to wrinkle too?



Radials wrinkle very little if any. Without frame by frame you won't see it. Any 2 1/2" spring of the correct length for you shock will work. I'm assuming on the rear you are probably running 12" long springs. But that is a guess.
Doug


Thank you
I can definately see some wrinkle I think i need to raise the spring for more shock extensions? I think this will raise the rear.

20220801_135634~2.jpg

1970 Barracuda Convertible
1968 Satellite Street Strip car
1654.5 Mustang
1955 Land Rover
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