#1  
Old 05-14-2024, 01:11 AM
yellow1098's Avatar
yellow1098 yellow1098 is offline
Senior Member
 
Join Date: May 2010
Location: Orlando
Posts: 239
Default Bias Ply slicks or drag radials?

So with trying to get better on my 60ft times I am trying to decide between a bias ply slick or a drag radial tire in a 28x10.5x15 size could maybe squeeze an 11.5. I have currently been using my 17inch tires with MT Estreet R’s right now and I can’t really leave that hard or power brake off the line at all right now. I believe I can improve a lot on my 60ft by going to a 28 inch tire on 15’s.

I was hoping I could get some feedback and experience with both tires and some suggestions….from what I’ve learned I could probably leave at a little higher rpm with the bias ply but don't like the stories I’ve heard about about them being wobbly at high speeds.

Please let me know your thoughts and feedback…thank you as always!

  #2  
Old 05-14-2024, 02:47 AM
Dragncar Dragncar is offline
Ultimate Warrior
 
Join Date: Mar 2004
Location: Humbolt County California
Posts: 8,384
Default

You are better off with radials.
Tried both, 60 footed about the same.
But the radials gave me a tenth and were much more stable on the big end.
I had to buy bias last year and the car never made it to the track.
Wish I had waited for the radials.
Now looking for some 15x10 Welds just to have a excuse to buy some radials.

  #3  
Old 05-14-2024, 06:48 AM
ta man ta man is offline
Ultimate Warrior
 
Join Date: Apr 2006
Location: Clinton,Ontario,Canada
Posts: 5,366
Default

Run a set of M/T et pro radials 275/60/15

__________________

466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2
373 gears 3200 Continental Convertor
best et 10.679/127.5/1.533 60ft
308 gears best et 10.76/125.64/1.5471
The Following User Says Thank You to ta man For This Useful Post:
  #4  
Old 05-14-2024, 08:13 AM
chuckies76ta's Avatar
chuckies76ta chuckies76ta is offline
Ultimate Warrior
 
Join Date: Jun 2004
Location: Canada
Posts: 3,114
Default

You could try the Hoosier drag slick with the stiff sidewall. They work great for heavy cars. I don't know how true this is, but I was told they prep the track different for cars with radial tires.
https://hoosiertiregp.com/hoosier-dr...-c07-18155c07/

__________________
68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick.
Best so far 10.12@133 mph. 1.43 60 ft.
76 Trans am, TKX .81 o/d, 3.73 Moser rearend,
468 with KRE D-ports, Doug headers, 3" Exh.
  #5  
Old 05-14-2024, 12:27 PM
OCMDGTO's Avatar
OCMDGTO OCMDGTO is offline
Ultimate Warrior
 
Join Date: Sep 2014
Location: Ocean City Md
Posts: 1,200
Default

How about a radial slick? I've run Hoosier and M/T with good results, no tubes needed

__________________
Chris D
69 GTO Liberty Blue/dark blue 467, 850 Holley, T2, Edelbrock Dport 310cfm w Ram Air manifolds, HFT 245/251D .561/.594L, T400, 9" w 3.50s 3905lbs 11.59@ 114, 1.57/ 60'
  #6  
Old 05-14-2024, 02:27 PM
yellow1098's Avatar
yellow1098 yellow1098 is offline
Senior Member
 
Join Date: May 2010
Location: Orlando
Posts: 239
Default

I was wondering about those radial slicks….that was my questions…..a couple guys at the track suggested the bias plys to me so I could leave at alittle higher rpm and said they would drop my 60ft by a couple tenths….

I just didn’t want the wobble at the big end but it might be worth it to pick up a couple tenths on the 60ft

  #7  
Old 05-14-2024, 05:23 PM
Dragncar Dragncar is offline
Ultimate Warrior
 
Join Date: Mar 2004
Location: Humbolt County California
Posts: 8,384
Default

You are not going to pick up a couple tenths with any slick if you already have a cheater slick IMO.
I never picked up in 60' turning up the launch RPM dial. Front tires might pop up a little more but the 60' did not change much.
The MT Pro Bracket Radial is the one to get.
Its made to hook on tracks with not the best prep.

  #8  
Old 05-14-2024, 07:33 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 20,626
Default

When my TA had the roller cam 5000 stall convertor combo and 1.5 60 ft'd I was using Hoosier 9" radial slicks. They were way more sensitive to track prep than the M/T bias I had been running but did not "grow" on the big end and I could run taller and not hit the TA wheel well spoiler. My M/T radial DOTs on it now act about like the radial slicks as far as track prep.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #9  
Old 05-15-2024, 10:10 PM
yellow1098's Avatar
yellow1098 yellow1098 is offline
Senior Member
 
Join Date: May 2010
Location: Orlando
Posts: 239
Default

Interesting thanks guys! I will look into giving the MT pro bracket radials a try!

  #10  
Old 05-16-2024, 10:18 AM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 20,626
Default

I ran my radial slicks at about 16-18 psi and no wobble! Within 1/2-1" of body work.

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #11  
Old 05-16-2024, 06:55 PM
triathlonx13's Avatar
triathlonx13 triathlonx13 is offline
Ultimate Warrior
 
Join Date: Aug 2007
Location: NY
Posts: 2,258
Default

My TA worked great with M/T ET STREET® R BIAS

  #12  
Old 05-17-2024, 11:21 AM
yellow1098's Avatar
yellow1098 yellow1098 is offline
Senior Member
 
Join Date: May 2010
Location: Orlando
Posts: 239
Default

They make an ET street R Bias? I thought the R stood for radial?

  #13  
Old 05-17-2024, 12:21 PM
triathlonx13's Avatar
triathlonx13 triathlonx13 is offline
Ultimate Warrior
 
Join Date: Aug 2007
Location: NY
Posts: 2,258
Default

Quote:
Originally Posted by yellow1098 View Post
They make an ET street R Bias? I thought the R stood for radial?


https://www.mickeythompsontires.com/...-street-r-bias

  #14  
Old 05-17-2024, 02:03 PM
PONTIAC LARRY's Avatar
PONTIAC LARRY PONTIAC LARRY is offline
Ultimate Warrior
 
Join Date: Jan 2004
Location: Republic of Texas , Ellis County
Posts: 2,109
Default

Quote:
Originally Posted by Dragncar View Post
You are better off with radials.
Tried both, 60 footed about the same.
But the radials gave me a tenth and were much more stable on the big end.
I had to buy bias last year and the car never made it to the track.
Wish I had waited for the radials.
Now looking for some 15x10 Welds just to have a excuse to buy some radials.
Exactly my experience as well.. back when I running the Pont 455 in my Olds wagon mid 12's last time out before pulling engine to move over to Catalina and borrowed regular street S/S MT DR's 235/60R15 in place of 26x10 full slicks and ran a new best of 12.5 instead of usual 12.6 and felt so stable and good like driving a normal car no walking around unstable slick feel. Never bought any slicks again since and just run bigger 275 60 15 MT SS DR's on my Catalina a second quicker than wagon and feels fine more in it too

__________________
63 Catalina coupe 467 cid budget drag car 11's 1/4 , 7.3 1/8th pump gas n/a
66 Star Chief Executive 57k mile
69 Le Mans 2 dr HT 350 85k mile 15 sec 1/4
69 Firebird 400 Burgandy/Black
70 Olds Rallye 350 F85 4 speed 3.91's
70 Olds Cutlass Cruiser Red Wagon 350 101k miles 15 sec 1/4 12 sec w 455
74 Cheyenne Super C10 LWB Gen 6 454 w ZZ502 cam 3.07gear 13.1 1/4, 8.3 1/8
2020 RAM 1500 SLT 4x4 5.7 A8 Hemi
2007 Hummer H3 3.7 liter turd
2019 Chevy Spark petrol car 38 mpg
  #15  
Old 05-17-2024, 04:55 PM
Dragncar Dragncar is offline
Ultimate Warrior
 
Join Date: Mar 2004
Location: Humbolt County California
Posts: 8,384
Default

Yeah, I just made my mind up to just sell my Hoosier 29.5x15 slicks and just buy some MT Pro Bracket Radials. The Hoosiers are still basically new. Only been down the track twice and never had a burnout. Little nubs of the t!ts are still there.
I am adding a good 10 mph to the car. 550ish HP old engine to 700 HP range so I don't want to go back to that wobble at 130+ MPH when I get off the gas.

  #16  
Old 05-18-2024, 08:42 AM
gman005's Avatar
gman005 gman005 is offline
Ultimate Warrior
 
Join Date: May 2005
Location: Northlake IL
Posts: 1,192
Default

I run a radial slick with no problems.

__________________
A new best of 9.135 @ 145.41
71 Lemans Sport.
72 Lemans Sport.
  #17  
Old 05-21-2024, 11:49 PM
yellow1098's Avatar
yellow1098 yellow1098 is offline
Senior Member
 
Join Date: May 2010
Location: Orlando
Posts: 239
Default

Is this the one you guys are running?
Attached Thumbnails
Click image for larger version

Name:	IMG_0166.jpg
Views:	59
Size:	50.8 KB
ID:	634096  

  #18  
Old 05-22-2024, 12:02 AM
Dragncar Dragncar is offline
Ultimate Warrior
 
Join Date: Mar 2004
Location: Humbolt County California
Posts: 8,384
Default

Thats the one. Mine are 10.5 x 15. 30" tall.

  #19  
Old 05-22-2024, 10:28 PM
Dragncar Dragncar is offline
Ultimate Warrior
 
Join Date: Mar 2004
Location: Humbolt County California
Posts: 8,384
Default

Mine showed up today' 30 in tall just like the last set.
What I REALLY want is a 31" tall radial with a 11" tread but need a 13" of less section with.
Will have more power with this engine and I bet I could put a taller tire to good use.
Hoosier, MT , can you make me that tire please ?
Attached Thumbnails
Click image for larger version

Name:	Screenshot 2024-05-22 at 19-21-18 Mickey Thompson 250797 Mickey Thompson Pro Bracket Radial Tire.jpg
Views:	17
Size:	22.9 KB
ID:	634137   Click image for larger version

Name:	Screenshot 2024-05-22 at 19-21-49 Mickey Thompson 250797 Mickey Thompson Pro Bracket Radial Tire.jpg
Views:	18
Size:	54.5 KB
ID:	634138  

  #20  
Old 05-22-2024, 10:32 PM
yellow1098's Avatar
yellow1098 yellow1098 is offline
Senior Member
 
Join Date: May 2010
Location: Orlando
Posts: 239
Default

For that radial tire slick….can I put them on before and drive to the track? Or can they not be driven on the street at all?

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:02 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017