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Drag Radial or Bias Ply for Heavy 4spd Car? #1080049
09/21/11 09:34 PM
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SCATPK Offline OP
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Just wondering what the concensus is on what works best with a heavy car and a 4spd at the track? My gtx is 3925lbs without my butt in the seat and have ran my best 60ft times with a bias ply tire m/t et streets. I have run e/t radials the last couple of times to the track and having a hard time getting a good 60ft without spinning the tires. I am far from an expert at the track and just like to play but would like to get the best possible traction when I do go out. Best 60 with the bias plys is 1.760 and 2.001 with the radials. Any tips on what would work best with my setup?

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080050
09/21/11 09:57 PM
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I have`nt tried yet,but the guys over on the U.M.T.R. web have said over and over drag radials don`t work well on stick cars unless you have a really soft clutch.
They are good tires but the sidewall is`nt "giving" enough for the shock of a clutch application.

P.S. You have TOO much POWER


70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas
9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ!
2013 StickShift Challenge Winner@ Mopar Nationals!
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: 6bblFLASH] #1080051
09/21/11 10:15 PM
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Columbus, OH
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Bias for sure

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: redruM] #1080052
09/21/11 10:32 PM
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South San Francisco, Ca
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MT ET Radials are good for the street but not the track. They don't grip. Get your self some MT ET Streets.


[img]http://www.imgur.com/hxlGUJt.gif[/img]
4-speed
3:54 Dana
13.01 @107.93 with street tires (not hooking up)
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: 70sixpkrt] #1080053
09/21/11 10:45 PM
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What would be a good size bias ply that is equal in size to a 325-50-15? Would buying a set of slicks be best for having a bit of fun at the track once in a while? I have been told by some guys for maximum traction just buy some slicks and call it good. I do have good strong parts so unless I do something really stupid should not break anything. Just want the best bang for the buck when I make the trip and take the time off to go and play and see how fast I can go. My best time has been 11.81 @ 119.426mph and would like to see an 11.50 timeslip. Again I am not a racer and the car is my street driver just want to do the best I can when at the track with my limited experiance. I know a lot of my issues has to do with me shifting it hard down the track but again I drive it up and like to be able to drive it home without the assistance of a tow truck! Though I realize anything can happen and the second to last time out broke an axle in my orginal dana rearend. I now have new axles thanks to Doctor Diff so I should be good there.

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080054
09/21/11 10:52 PM
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Well if its in your budget,yes I would get some small slicks for track days
But I completely understand wanting to do it in street trim as well. I`m trying to pull that one off too


70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas
9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ!
2013 StickShift Challenge Winner@ Mopar Nationals!
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080055
09/21/11 11:11 PM
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Triple Threat Offline
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Quote:

What would be a good size bias ply that is equal in size to a 325-50-15?




28x13.5x15 is the comparable bias ply.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: 6bblFLASH] #1080056
09/21/11 11:16 PM
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Any recommendation on size of slicks that will work on a 10" wheel and clear the wheelwells of a 68 b-body? And what do you guys think of slicks vs a dot bias ply for someone like myself? Help a mopar brother out so I do not embarass myself.

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: Triple Threat] #1080057
09/21/11 11:17 PM
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Quote:

Quote:

What would be a good size bias ply that is equal in size to a 325-50-15?




28x13.5x15 is the comparable bias ply.




Thanks!

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080058
09/21/11 11:50 PM
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Quote:

Quote:

Quote:

What would be a good size bias ply that is equal in size to a 325-50-15?




28x13.5x15 is the comparable bias ply.




Thanks!




That is if you stick with the DOT version, either the M/T ET streets or a Hoosier Quick Time PRO.

Stick with a street legal tire, that way you can run on street nights if your track has them. There is little to nothing to be gained by going with a real slick compared to the DOT legal version that has a couple small lines in it.

This tire will mount great on a 10" wheel. I dunno if it will fit a B body as I don't have one, but if the 325/50 clears, this should as well.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: Triple Threat] #1080059
09/21/11 11:59 PM
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So it sounds like the dot bias ply tire is the way to go! Anyone know if a 28x13.5x15 is a bit smaller or larger than the 325-50-15 as the 325 just clears my rolled body lip with no rubbing. So if it is larger at all I will have an issue. Anyone have any favorite bias ply tires? I used to run a m&h dot tire on my 70 dart and it worked very well. So before I spend some money let me know what you are running and how it works. Again any input is appreciated!

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080060
09/22/11 12:06 AM
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Section width on the M/T 325/50 is 13.1"
Section width on the M/T 28x13.5 is 13.2"
Section width on the M/T 28x12.5 is 12.6"
Section width on the Hoosier QTP 28x13.5 is 12.9"

Bias ply is going to flex more since the side wall is softer, so any of the 13.5's may rub. Sounds like you should go with the 12.5" tire to gain a little clearance. How much room do you have to the front of the wheel well? Bias ply will grow in height as well at speed. If you have 1/2 inch or more I wouldn't worry one bit.

Last edited by Triple Threat; 09/22/11 12:25 AM.

-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: Triple Threat] #1080061
09/22/11 12:20 AM
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I have at least a 1/2 inch of room so should be good. How are the hoosiers in comparison to the m/t`s?

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080062
09/22/11 12:24 AM
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6 of one, half dozen of the other. People are brand loyal to tires like they are to car manufacturers. Personally I don't think it matters, there isn't a big difference. Pick the tire that fits the best size wise. That's my opinion anyways.

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080063
09/22/11 12:28 AM
09/22/11 12:28 AM
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I bet your car would like the Hoosier QTP tires. They are bias and I used to run them on my 63 and my son runs them on his Dart. They have 2 treads like a cheater slick but they hooked real good for me. Now I use radial slicks as I wanted radial tires in the back since I have them up front. Ron

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080064
09/22/11 12:34 AM
09/22/11 12:34 AM
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Quote:

I have at least a 1/2 inch of room so should be good. How are the hoosiers in comparison to the m/t`s?




The QTP bits better than the M/T but it also have a
shorter life span... ran them both at drag week in
the past

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: 383man] #1080065
09/22/11 12:36 AM
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SCATPK Offline OP
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So it seems that a bias ply is the way to go and just pick one that fits best for my application. I am going to compare the various tires sizes and pick one that will fit the best. Again I appreciate the feedback guys!

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080066
09/22/11 12:39 AM
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Quote:

So it seems that a bias ply is the way to go and just pick one that fits best for my application. I am going to compare the various tires sizes and pick one that will fit the best. Again I appreciate the feedback guys!




the side wall on the bias tire can take shock better
(not as stiff)

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: MR_P_BODY] #1080067
09/22/11 12:55 AM
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Mr P, that seems to be the story when running a 4spd. With the et radials anything above 2800 rpm just spins the tires no matter how little pressure I try. Again I am not in the same league as most of you and just want something that will be a little forgiving with my inexperiance at the track. That is what is so great about this site all of the guys helping everyone out even when they ask dumb questions that have been asked many times in the past.

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080068
09/22/11 08:25 AM
09/22/11 08:25 AM
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Radials not recomended for stick car.


JAKES AUTOMOTIVE
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080069
09/22/11 10:18 AM
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South Park, Pa.
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I've run both, radials and slicks. Radials don't work real well with a stick car. Like your experience,they would spin at anything above idle rpm. I've gone 1.60 with slicks with my car in street trim other than the slicks, and my car is pretty much as heavy as yours is. As mentioned, Hoosers grab better, but don't last as long as the MT's. Both are good, however, and you can't go wrong with either.


4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: 68LAR] #1080070
09/22/11 10:53 AM
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Just like everybody else mentioned, get the bias plys. My QTP's worked a ton better both on the street and on the track than a set of drag radials.

I had a 29x11.50 QTP on my 68 Charger, it fit without hitting anything but was on the tight side.


'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: Blusmbl] #1080071
09/22/11 01:34 PM
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so how does the car handle in general on the street with bias on the rear and radial on the front? i wouldn't run it that way all the time, but when they are on there for driving to the track and such...

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: SCATPK] #1080072
09/22/11 02:12 PM
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Have ran similar car to yours for many years (70 Roadrunner alum headed 451 TKO 5spd) tried every possible bias and radial "street slick" day in day out 28 x 12.5 M/T street ET most forgiving (1.46-1.49 60 fts 11.20's 121mph) 13.5 rubbed on my car. If you really wanna have some fun get a Mcleod sof-lok and let her rip. Don't let any one tell you can't be used on the street. You'll never break parts and will be able to really realize your cars potential and get some consistent traction and go some rounds and have some fun. Bracket racing is way more fun when you're winning!

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: 4spdJohnny] #1080073
09/22/11 06:17 PM
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bias ply all the way! Radials are just going to make you chase your tail and are a waste of time on a stick car, my buddy had the problem with his mustang...as far as I know the biggest difference between the hoosiers and M/T's is that the hoosier is softer...I run the M/T's myself, in the 28x12.5 size, and they work awesome..I have about 12psi in them hot when i run, and the wrinkle and bite hard!

Also, in regards to driving with radials on the front and bias plies on the back- I have 165/80R15 skinnies on 4" rims up front with my e/t street's in the back...I drive my car everywhere like this! the two hours of highway to the track, in downpours, etc....you name it i drive it....It's really no big deal, as long as you watch for the tar lines lol...to all the guys I know who say its crazy, I say sack up because you don't know how to drive obviously

good luck

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: mshred] #1080074
09/23/11 04:03 AM
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Quote:

bias ply all the way! Radials are just going to make you chase your tail and are a waste of time on a stick car, my buddy had the problem with his mustang...as far as I know the biggest difference between the hoosiers and M/T's is that the hoosier is softer...I run the M/T's myself, in the 28x12.5 size, and they work awesome..I have about 12psi in them hot when i run, and the wrinkle and bite hard!

Also, in regards to driving with radials on the front and bias plies on the back- I have 165/80R15 skinnies on 4" rims up front with my e/t street's in the back...I drive my car everywhere like this! the two hours of highway to the track, in downpours, etc....you name it i drive it....It's really no big deal, as long as you watch for the tar lines lol...to all the guys I know who say its crazy, I say sack up because you don't know how to drive obviously

good luck





I will say that when I ran the Hoosier bias QTP tires on the back of my 63 and the radial tires up front that it was not to bad on the track but could feel kinda squirley at times on the roads. Myself I got used to it but when my son drove it he really noticed it. Well I decided to try the Hoosier radial slicks and I will say it was like night and day. It handled like a Caddy with the radials out back also. Even at the track it is so much nicer and does not want to wonder at all. As you said yes you can tolerate it but since I drive my 63 alot it's just not worth the hassle when it handles so much better with either radials or bias at all four corners. And I have not had any hook problems with the radial slicks as it actually picked up about 1/2 a tenth on the radial slicks. Ron



Last edited by 383man; 09/23/11 04:10 AM.
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: 383man] #1080075
09/23/11 03:22 PM
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Quote:

Quote:

bias ply all the way! Radials are just going to make you chase your tail and are a waste of time on a stick car, my buddy had the problem with his mustang...as far as I know the biggest difference between the hoosiers and M/T's is that the hoosier is softer...I run the M/T's myself, in the 28x12.5 size, and they work awesome..I have about 12psi in them hot when i run, and the wrinkle and bite hard!

Also, in regards to driving with radials on the front and bias plies on the back- I have 165/80R15 skinnies on 4" rims up front with my e/t street's in the back...I drive my car everywhere like this! the two hours of highway to the track, in downpours, etc....you name it i drive it....It's really no big deal, as long as you watch for the tar lines lol...to all the guys I know who say its crazy, I say sack up because you don't know how to drive obviously

good luck





I will say that when I ran the Hoosier bias QTP tires on the back of my 63 and the radial tires up front that it was not to bad on the track but could feel kinda squirley at times on the roads. Myself I got used to it but when my son drove it he really noticed it. Well I decided to try the Hoosier radial slicks and I will say it was like night and day. It handled like a Caddy with the radials out back also. Even at the track it is so much nicer and does not want to wonder at all. As you said yes you can tolerate it but since I drive my 63 alot it's just not worth the hassle when it handles so much better with either radials or bias at all four corners. And I have not had any hook problems with the radial slicks as it actually picked up about 1/2 a tenth on the radial slicks. Ron







I drive my car everywhere every day, even when its raining...just came back from work in a downpour with dead e/t streets on the back LOL don't get me wrong, the same type of tire up front and out back definitely handles much better, a radial setup more so....but imo there is nothing difficult in driving a car with skinny radials up front and fat bias plies out back...takes a little bit of finesse and careful driving

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: mshred] #1080076
09/23/11 05:50 PM
09/23/11 05:50 PM
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Quote:

Quote:

Quote:

bias ply all the way! Radials are just going to make you chase your tail and are a waste of time on a stick car, my buddy had the problem with his mustang...as far as I know the biggest difference between the hoosiers and M/T's is that the hoosier is softer...I run the M/T's myself, in the 28x12.5 size, and they work awesome..I have about 12psi in them hot when i run, and the wrinkle and bite hard!

Also, in regards to driving with radials on the front and bias plies on the back- I have 165/80R15 skinnies on 4" rims up front with my e/t street's in the back...I drive my car everywhere like this! the two hours of highway to the track, in downpours, etc....you name it i drive it....It's really no big deal, as long as you watch for the tar lines lol...to all the guys I know who say its crazy, I say sack up because you don't know how to drive obviously

good luck





I will say that when I ran the Hoosier bias QTP tires on the back of my 63 and the radial tires up front that it was not to bad on the track but could feel kinda squirley at times on the roads. Myself I got used to it but when my son drove it he really noticed it. Well I decided to try the Hoosier radial slicks and I will say it was like night and day. It handled like a Caddy with the radials out back also. Even at the track it is so much nicer and does not want to wonder at all. As you said yes you can tolerate it but since I drive my 63 alot it's just not worth the hassle when it handles so much better with either radials or bias at all four corners. And I have not had any hook problems with the radial slicks as it actually picked up about 1/2 a tenth on the radial slicks. Ron







I drive my car everywhere every day, even when its raining...just came back from work in a downpour with dead e/t streets on the back LOL don't get me wrong, the same type of tire up front and out back definitely handles much better, a radial setup more so....but imo there is nothing difficult in driving a car with skinny radials up front and fat bias plies out back...takes a little bit of finesse and careful driving





Its funny as you said its no problem for you or me to drive our muscle cars with different type tires from front to rear but I had to laugh when my youngest son who was driving an SRT-4 at the time drove my 63 when it has the QTP's out back. He actually wanted to know what was wrong with my car. Its just all he had ever driven was newer rack and pinion steering cars and I guess it did feel different. Heck any muscle car will handle alot different then any newer cars with rack & pinion steering even with 4 radials on it. Ron

Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: 383man] #1080077
09/23/11 11:40 PM
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My car with radials on the back and Bias Ply's on the front handled like Poop. Radials on all 4 corners and its piece of cake for anyone to drive, even with a spool out back.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: Drag Radial or Bias Ply for Heavy 4spd Car? [Re: Triple Threat] #1080078
09/24/11 12:57 AM
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I have to agree with the person recommending the Mcleod Soft-Lock for the best clutch setup on a car that sees both street and strip. Call Tim Haytt (440 254 1311) if/when you decide to go that route. Just remember to drill the adjusting hole in the back of the scattershield. I wouldn't use any other clutch.

I would recommend just going with a straight slick if you are just seeing what times you can get, not worrying about street night rules or such. Generally, they are a little cheaper than DOT tires and realistically you will be using your steel belted radials for everyday driving.

As mentioned, either M/T or hoosier will work. I just installed a set of Hoosier 29x9x15 slicks on our 70 RR, still sorting them. The compound is the D07, which according to their tech was developed specifically for stick cars. I also run tubes. The feedback on the UMTR site is that the Hoosiers like air pressure, I was recommended 16 psi, and a man on the UMTR website with a nice 64 Chevy with a stroked 409 runs 18 psi successfully. The tubes help stiffen the sidewalls, and the higher psi makes the car much less squirrelly. A 9 inch slick will work great with your 10" wheels, you can run higher pressures and still have a flat contact patch. The taller diameter also helps with contact patch. The 29x9-15 on 8" wheels fit fine in the stock wheel wells of a 70 RR with a stock width S60. Not sure of the back space on the rims but it is not much(maybe 3.5"??), the tires could easily go inboard more.

Have fun!!


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