Tips for a Drag Radial Newby
#2542061
08/27/18 03:48 PM
08/27/18 03:48 PM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
OP
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OP
master
Joined: Jan 2003
Posts: 2,933
A shed in England
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Hi All. I'm racing in a week or so and going to try out some M/T pro drag radials 3062R's. Car is a 3940lb race weight Challenger, which has been 1.36 60ft but we seem to be struggling at the moment with the Bias plys, not sure if the sidewalls are gone I need some tips, do's and don'ts etc. We're total newbs when it it comes to Radials Front suspension is stock(ish) type with .870" T/B's, heim jointed struts, QA1 heim jointed UCA's and stock bushed QA1 LCA's with D/A Afco's and Menscer valving. Rear is Caltracs with Monoleafs, shackles, A/R bar, again with Menscer valved Afco D/A's. 4:10 Dana stock 727 ratios. 572 puts out around 850 HP OH I'll be taking my old Bias plys with me just in case. TIA
'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: Tips for a Drag Radial Newby
[Re: Tig]
#2542134
08/27/18 07:41 PM
08/27/18 07:41 PM
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Joined: Mar 2009
Posts: 2,470 Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,470
Sydney,Australia
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you are in for a treat !
you are faster than me and 200lbs heavier . I run the PBR 29.5 ( 30" tall) @ 19psi on a 10" rim Decent burnout , I like to see good smoke maybe 5 seconds or so , too little tyre will not hook fully Tyre pressure up till spins , probably start at 18 .Rear shock - towards loose extension / tight comp . I run Viking rears 10 comp 5 ext , QA1 singles up front full loose . I have no AR bar . A mate in his 4000lb 62 chev on the PBR 29.5 runs 18.5-20 on a 8" rim Good luck . I have found the PBR is quite forgiving , it wont blow the tyre off just chirp or a partial turn then hooks
Tex
New best ET 10.259@129.65 . New best MPH 130.32 Finally fitted a solid cam, stepped it up a bit more 3690lbs through the mufflers New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm Power by Tex's Automotive
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Re: Tips for a Drag Radial Newby
[Re: Tig]
#2542324
08/28/18 05:10 AM
08/28/18 05:10 AM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
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OP
master
Joined: Jan 2003
Posts: 2,933
A shed in England
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Good point, I was unaware that they would be valved differently. They where done some time ago, I can remember that I spoke to Craig and that I would eventually be trying Radials, but would continue to use Bias plys for the time being as I just had some new. Don't recall anything coming up in conversation that I would need to change stuff. Could this be why I'm not 60fting like I did previous to the shocks being re-valved but I have made many other changes also??? The reason for re-valving was we ran out of extension damping.
'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: Tips for a Drag Radial Newby
[Re: Tig]
#2542540
08/28/18 03:17 PM
08/28/18 03:17 PM
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Joined: Jan 2004
Posts: 4,580 Motor City
6PKRTSE
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master
Joined: Jan 2004
Posts: 4,580
Motor City
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I would try the set up you have & go from there. More tire pressure than a slick & the shortest burnout possible to just get them to start to smoke. They also do not recover like a slick does with a slight pedal job to get them to recover. You have to gradually get back into the pedal & reload the suspension & get the weight distributed again or abort the run. Try again next time
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: Tips for a Drag Radial Newby
[Re: Tig]
#2547642
09/08/18 04:48 PM
09/08/18 04:48 PM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
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OP
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Joined: Jan 2003
Posts: 2,933
A shed in England
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They work
'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: Tips for a Drag Radial Newby
[Re: Tig]
#2548703
09/11/18 11:28 AM
09/11/18 11:28 AM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
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OP
master
Joined: Jan 2003
Posts: 2,933
A shed in England
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Just a quick update now I have a decent internet connection. We did indeed start out from where we left off settings wise but since we had issues with the bias plys we had the front shocks and travel set to weight transfer quick and the rear to hit the tire less than we usually do. 1st pass was a 1.38 60ft with the fronts touching just after the 60ft but not high enough to be out of the beams. Looks like we PB'd to the 1/8th (with the 572 motor) in MPH and ET. Unfortunately the car in the other lane had a bad missfire, I thought I was on the rev limiter and lifted at around 1100ft so we could have been on for a 9.5. We left everything as is for the next pass but we were now happy to "go for it" after getting the first pass out of the way and everything checking OK on return. This time though, it came up really fast and high, instinct took over and I made the error of lifting. The resultant crash landing about 100ft out squashed the pan and caused some minor breakages so we had to call it quits for that meeting. Have to say they do work but next time out we will be looking to calm it down some Thanks for all your reply's
Last edited by Tig; 09/11/18 11:37 AM. Reason: Add a picture
'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: Tips for a Drag Radial Newby
[Re: 70satelliteguy]
#2548730
09/11/18 12:29 PM
09/11/18 12:29 PM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
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master
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OP
master
Joined: Jan 2003
Posts: 2,933
A shed in England
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Tig, how come you have the "little" motor back in?? Mike Wanted to do some upgrades on the 655, then the car went to the paint shop for over 12 months, came back and I prepped and painted the trunk, shuts, engine bay and underneath for another 6 months. We also re-wired it and fitted loads of new suspension parts. The 572 went back in for a couple of meetings (we thought) but since we struggled with traction and bogging issues with the tunnel ram so it stayed in 'till we fixed all that. Now the 572 is staying in 'till we calm it down We're hoping to run 8's N/A on the 655 when all is done
'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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