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Author
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Topic: Spool vs. Limited Slip Differentials
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V-8
Gearhead Posts: 323
From: TURKEY/Istanbul
Registered: Dec 2003
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posted 06-02-2005 01:14 PM
   
Hi guys;
Which one would you prefer in street usage?
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capri man
Gearhead Posts: 7221
From: doerun, ga.
Registered: Nov 2000
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posted 06-02-2005 01:19 PM
a spool can be very dangerious on wet roads!! also the rear tires will wear out sooner.------------------
mike r
racing is real
everything else is just a game.
81 capri-302-7.25 @93mph 1/8
1.54 60ft 50 % of the fun dragracing is meeting people who will give you the shirt off their back to wipe the grease off your hands.
M&M member #839
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johnny 4-speed
Gearhead Posts: 172
From: Larkspur, Ca. USA
Registered: Oct 2004
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posted 06-02-2005 08:09 PM
Street car + spool =  Forget about the spool. JD
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 06-02-2005 08:43 PM
Spool will be slower than a limited slip, but it's nearly industructable.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Bloose
Gearhead Posts: 751
From: Milwaukee, WI
Registered: Dec 2001
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posted 06-03-2005 02:14 AM
quote:
Originally posted by Moneymaker:
Spool will be slower than a limited slip, but it's nearly industructable.
Hey Alex, I know you've been busy lately but can you explain? Just sort of curious. I've been told numerous times that spools are no good for the street. But then I know quite a few Jeep guys that run them and they say they are not that bad. Though I have never run a spool I would say a spool is a no go for a daily driven street ride. But I really don't think a Spool would be much worse that a strong locker on the street. Even a good posi will fishtail in the rain, so how is that different than a spool. For a limited use, street/strip car, one that is driven on occasion but not daily and not often if ever in foul weather, I think a spool may be a posibility. If I were going to try running a spool on the street I think I would try a Lincon locker first (welded spiders on an open diff). If I was ok with the handling I would go for the spool. If handling, steering, or whatever was spooky I would go LSD or locker. HTH,
B-loose [This message has been edited by Bloose (edited 06-03-2005).]
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Ci8UUP
Gearhead Posts: 183
From: Renton, Washington
Registered: May 2005
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posted 06-03-2005 08:21 PM
You will be miserable beyond belief if you run a spool on the street, the thing will drive like a tank and it will squeal the tires around every corner you take. Also, good luck trying to pull into a parking spot, you'll have to crank the wheels over, then throttle it quick to hop the rear end of the car around.
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steve'66
Gearhead Posts: 9476
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 06-03-2005 09:13 PM
A spool is not that bad. But it will not be a road race car.  You can get the car from point A to B with a spool. We do it with the street/strip cars, but we don't try to push them in the curves.  SteveW
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Ci8UUP
Gearhead Posts: 183
From: Renton, Washington
Registered: May 2005
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posted 06-05-2005 12:51 AM
define "not that bad"
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n2oMike
Gearhead Posts: 2680
From: Spencer, WV
Registered: Jan 2001
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posted 06-05-2005 10:06 AM
A spool forces both tires to turn at the same rpm. If one tire is a tad shorter than the other, drag is induced. Even if the tires are exactly the same size, if one tire is loaded more heavily than the other, it scrunches down, and is effectively shorter. Any turning will also cause drag. A limited slip will adjust for this. If you don't need the traction, a spool will just slow you down. (but not by a lot) ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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f100cleveland
Gearhead Posts: 361
From: St. James, MN
Registered: Sep 2004
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posted 06-05-2005 11:31 AM
quote:
Originally posted by Ci8UUP:
define "not that bad"
I ran a mini spool on the street for about 3 years on my 1982 F100. I didn't have much power then (it was a stock 351w) but the spool worked fine for driving on the street. The only bad part about it that I didn't like was how much my axles flexed when I turned. It was like a surging type feeling. I was only running the 28 spline axles too so I'm sure they were flexing a lot. I don't think its very much worse than driving with a Detroit Locker that has the heavier spring in it. But turning is a lot better with the locker than with the spool. For a limited street driven car, I'd say go spool if you just want a cheap posi but I'd spend the money on a locker or a tight limited slip. ------------------
1982 Ford F100 2wd Shortbox. Powered by a 357 Cleveland w/ closed chamber 4v's and a Funnelweb. Full Roller c-6 trans with Gear Vendors Overdrive and 4.86 geared Detroit Locker equipped 9" rear. 1982 F100 351c 4v 1977 F150 460 Burnout Truck
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Dubz
Gearhead Posts: 1888
From: Manitoba Canada
Registered: Oct 2002
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posted 06-06-2005 03:53 AM
How is it that spools are slower? i might not understand the lingo, so could someone fill me in.Thanks
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Steve68Cougar
Journeyman Posts: 23
From: Galva, KS, USA
Registered: Jun 2005
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posted 06-06-2005 09:34 PM
If you use a spool on the street I would suggest getting a street slick or at least something with a flexible sidewall. My Cougar had a mini-spool in it for a while and when I put Hoosier QTP's on it everything seemed less bound up. A regular street tire will tend to squeal and hop around corners whereas the wrinkle-wall gives quite a bit better. The Cougar has a traction-lok in it right now, which is much nicer for the street, but I'll put the mini-spooled 3rd member back in it before I go back to the strip (mostly because it'll be going from a 3.70 to a 4.56 gear). I wouldn't suggest doing it on a daily driver unless you're willing to put up with a car that doesn't like to do anything other than go in a straight line.------------------
68Cougar - 289, 4-speed
98 Mustang Cobra convertible - stock - does everything better than the Cougar except bring a smile to my face.
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Bloose
Gearhead Posts: 751
From: Milwaukee, WI
Registered: Dec 2001
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posted 06-07-2005 12:07 AM
quote:
Originally posted by Dubz:
How is it that spools are slower? i might not understand the lingo, so could someone fill me in.Thanks
From N2O above A spool forces both tires to turn at the same rpm.
If one tire is a tad shorter than the other, drag is induced. Even if the tires are exactly the same size, if one tire is loaded more heavily than the other, it scrunches down, and is effectively shorter. Any turning will also cause drag. A limited slip will adjust for this. If you don't need the traction, a spool will just slow you down. (but not by a lot) B
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