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Re: reg slicks to drag radial lower et
[Re: BeEtLeJuIcE !]
#845366
11/03/10 11:31 PM
11/03/10 11:31 PM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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Every car is different, But bottom line is a radial will be faster, but can be more tempermental when it comes to track prep. If it hooks, it will run hard. Every stock / super stock racer in the country knows this.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: reg slicks to drag radial lower et
[Re: Triple Threat]
#845367
11/04/10 12:53 AM
11/04/10 12:53 AM
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Joined: Oct 2003
Posts: 2,537
PORT ALBERNI , BC., CANADA
superwrench
master
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master
Joined: Oct 2003
Posts: 2,537
PORT ALBERNI , BC., CANADA
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Dustin's got that right.......I run MT ET Street radials and Hoosier bias slicks. My faster times have been on the Radial tires. BUT......poor track = poor launch (spin) but if they hook it'll be a hard run. The slicks are more forgiving with track conditions.....poor track means slower times but usually CONSISTANT slower times. With a good track.....still won't beat the radial. The whole thing I've found with the radials is that if they spin you'll be back peddling to tame it down because they'll keep spinning. So I guess what I'm saying is that if you have a superbly prepped track that you always run on, stay with a radial. If not...I'd personally run the bias slick for consistancy over best ET.  I just bought some new Hoosier bias slicks......first shot in the new season will be on them. Hope I don't surprise myself. 
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Re: reg slicks to drag radial lower et
[Re: 9 Sec Phill]
#845372
11/04/10 01:40 AM
11/04/10 01:40 AM
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Joined: Apr 2010
Posts: 1,049
ohio
all spooled up
OP
super stock
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OP
super stock
Joined: Apr 2010
Posts: 1,049
ohio
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phill is that on moter or nos
Last edited by hookd; 11/04/10 01:41 AM.
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Re: reg slicks to drag radial lower et
[Re: all spooled up]
#845373
11/04/10 08:18 AM
11/04/10 08:18 AM
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Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
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After trying unsuccessfully to get my car to work on slicks, I put on a pair of 295-65 drag radials after one of the tech guys at M/T recommended them to me. Runs much better on the radials.
I've been a best of 1.32 sixty foot and 9.54 at 140+ mph on the radials, footbraking and naturally aspirated.
The best I've gotten from it on bias ply tires is a 1.43 sixty foot and a 9.94 at 138+ MPH. Given the conditions I ran that in, the bias plies will MPH slightly better b/c they grow. Radials don't grow much, if at all.
In the bias ply tire's defense, I only have 8.5" wide rims and was running a 29.5x10.5 stiff sidewall M/T slick with tubes. I had to run 18 psi in them to keep from folding the tire up. With a wider rim I think it'd do a lot better.
The radials are faster when the track will hold them.
I recently ran into some major traction issues, but learned a valuable lesson about how important the front suspension is to making a small tire car work. It's all fixed now and runs like it has for the last 4 years.
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: reg slicks to drag radial lower et
[Re: preddy]
#845375
11/04/10 08:53 AM
11/04/10 08:53 AM
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Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
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Quote:
I was just talking about this very topic with some friends Saturday. It got me thinking.... My 10.5 slicks are screwed to the rim and I run inner tubes. What do you do with drag radials? Do you screw them to the rim too or is that not needed?
Mine are screwed to the rim. They will move like a slick.
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: reg slicks to drag radial lower et
[Re: an8sec70cuda]
#845376
11/04/10 09:38 AM
11/04/10 09:38 AM
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Joined: Jul 2010
Posts: 1,491
Oologah, Oklahoma
Big Squeeze
pro stock
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pro stock
Joined: Jul 2010
Posts: 1,491
Oologah, Oklahoma
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Like Chip mentioned, I bet the guys that go faster with radials either have a rim that's too narrow or the sidewalls are dead...... Think about it........If neither tires spins, why would one be quicker than the other?  It's, obviously, the sidewall........If radials were so great, you'd see them in Stock Elimantor (yes, I know a lot of them run a radial slick)........ So, to have the same ET with slicks (which is typcially more desired because it is the more forgiving tire), the sidewalls need to be stiff, which means 2" wider rim than tread width along with the correct, higher, air pressure.........and tubes help stiffen the sidewall too.........and you're not going to be able to run slicks to the cords like so many people do.........   We'd actually change the tire pressure in 1/4-1/2LB increments on Top Fuel cars to control how fast the car gets up on the tire and to control tire shake........If the track is really good, we'd lower the tire pressue 1/4-1/2LB so the sidewall wasn't as stiff so it would sling out and get up on the tire quicker to keep it from shaking.......If the track was bad, we'd raise it 1/4-1/2LB to stiffen the sidewall to prevent shake because we couldn't hit it as hard with clutch because it could blow the tires off....... 1/4-1/2LB doesn't sound like much, but with a tire that big, that's quite a bit of air....... Even weather effected how much tire pressure we ran.......Bad air meant lower pressure because power was down, so it would get up on the tire easier/quicker........
If you can't handle the truth, you're living a lie.......
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Re: reg slicks to drag radial lower et
[Re: HEMIFRED]
#845383
11/04/10 12:27 PM
11/04/10 12:27 PM
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Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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The radial, of comparable size, provided you can hook it, will be faster than the bias tire, every time. The radial tire construction, is simply better. Yes the sidewall is stiffer, but the tire as a whole is stiffer. The tire stays more "round" during the run, which is quicker and faster. We run both slicks and radials. With identical tune ups and identical 60fts, the 330 and 660 numbers, are quicker with radials, EVERY time.
Monte
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Re: reg slicks to drag radial lower et
[Re: Monte_Smith]
#845384
11/04/10 12:33 PM
11/04/10 12:33 PM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
The radial, of comparable size, provided you can hook it, will be faster than the bias tire, every time. The radial tire construction, is simply better. Yes the sidewall is stiffer, but the tire as a whole is stiffer. The tire stays more "round" during the run, which is quicker and faster. We run both slicks and radials. With identical tune ups and identical 60fts, the 330 and 660 numbers, are quicker with radials, EVERY time.
Monte
But when the hook goes away it won't recover without pedaling on a car with any power. Even when pedaled it's hard to get them stuck again. I know these tires are resposible for some fan interest.
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Re: reg slicks to drag radial lower et
[Re: BobR]
#845387
11/04/10 01:09 PM
11/04/10 01:09 PM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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This is hard to articulate, but I'll try. I always consider that most all things your car does takes energy to make that thing happen. This energy is supplied in the form of torque from the motor. Anything that takes energy without effectively moving the car forward steals that much energy / power from your ultimate goal of getting to the stripe. Now, A bias tire with softer sidewalls flexes much more at the sidewall (and I believe in the treadpatch) than a radial tire. Flexing the tire takes energy. This energy that is used to flex the tire is energy that dies in the tire, and is not transferred to the track. The stiffer radial tire flexes less, and thus is more effective at transferring all the energy its recieving into rolling force. The flex is also what makes them hook, so its a double edged sword. But, as said, as long as the radial tire hooks, you're now using more effective energy to push you forward, as less is spent flexing the tire. I think this same principal can be applied to rear suspension (but thats another discussion). Also, as far as growth. My philosopy here is that growth will only help if you're at the end of your motor's power range, and it needs more gear. If you're still in your effective power range at the top of the track, then you don't want growth, the lower effective gear ratio offered by the non-growing tire will offer acceleration at a faster rate than the higher effective gear. These are merely my thoughts as a reasonably intelligent person, offered up for discussion. Your thoughts may vary.
Last edited by GEnsrud; 11/04/10 01:10 PM.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: reg slicks to drag radial lower et
[Re: BobR]
#845388
11/04/10 01:59 PM
11/04/10 01:59 PM
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Joined: Oct 2003
Posts: 2,537
PORT ALBERNI , BC., CANADA
superwrench
master
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master
Joined: Oct 2003
Posts: 2,537
PORT ALBERNI , BC., CANADA
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Quote:
Quote:
The radial, of comparable size, provided you can hook it, will be faster than the bias tire, every time. The radial tire construction, is simply better. Yes the sidewall is stiffer, but the tire as a whole is stiffer. The tire stays more "round" during the run, which is quicker and faster. We run both slicks and radials. With identical tune ups and identical 60fts, the 330 and 660 numbers, are quicker with radials, EVERY time.
Monte
But when the hook goes away it won't recover without pedaling on a car with any power. Even when pedaled it's hard to get them stuck again. I know these tires are resposible for some fan interest.
 That's it exactly. Once mine decide to fry, then the run's done...no ifs,ands, or buts. Only way to get them to hook after that is either back peddle severely or try an upshift(short shift) to the next gear.
Personally, when my radials loose it, I can easily cover the whole width of the track for the first 300 feet....sometimes not a fun ride. 
Great for the fans, but hell on the driver. 
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Re: reg slicks to drag radial lower et
[Re: tboomer]
#845389
11/04/10 02:20 PM
11/04/10 02:20 PM
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Joined: Jan 2003
Posts: 2,924
A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,924
A shed in England
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Are we discussing treaded radial race tyres or radial slicks? I've found that a radial slick will et and 60ft better but are not as forgiving on less well prepped tracks.
I've no experience with the treaded radial race tyres but have listened to many tales of mixed results with them, seems they will work well on a good track, similar to the above.
'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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