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Author Topic:   mini-spools and full-spools
nailngoracing
Dirt Maniac

Total posts: 170
posted March 17, 2005 08:20 PM  

what's the performance differance in the two.

Why do people say mini's **** !

20 dollars versus 100 dollars?



BIGDADDYBOZ
Dirt Freak

Total posts: 466
posted March 17, 2005 09:35 PM  
alot depends what you are running it in and how many ponies you are pushing.

WesternAuto17
Dirt Forum Champ
Total posts: 569
posted March 18, 2005 07:03 AM  
A full spool is lighter, thus it has less rotating weight.

They do the exact same job (locking the axles together), but a full spool won't take as much horsepower in theory. In a 3000 lb street stock, one isn't much different from the other, but all the little things add up.

racin78p
Dirt Freak

Total posts: 333
posted March 19, 2005 09:00 PM  
Uhhhhhhhh, I know I am not a rocket scientist but,....

A full spool is so very much stronger than a mini. A full spool is heavier unless you buy a lightened one, and it still may be a tad heavier. I have a buddy who won the fatory stock championship with a mini in his 9" and had no problems. But the next year went to a full. I have always ran a lightened full spool, cause I don't want to worry about one more thing (the rear gears). But if money is a major factor and you aren't putting alot of hp to the rear wheels, then a mini could be the ticket. If you do that, get a moly pin for it. About ten bucks and is much stronger. Some consider it the weak point with a mini spool set-up. Have a pleasent tomorrow and race on.

------------------
racin78p
if it ain't fun, then don't run

ryan
Dirt Forum Champ
Total posts: 776
posted March 19, 2005 10:21 PM  
The full spool itself maybe heavier but by the time you replace all that stuff in the rearend with it you are much lighter than a minispool. I thought I read somewhere that the difference between a 9in with a mini and one with a lightweight full spool was 13 lbs. Don't remember if thats exactly right or not but it should be close.

boas51
Dirt Maniac

Total posts: 190
posted March 20, 2005 09:06 AM  
the full spool is much lighter than a mini spool in a factory carrier. the full spool is actually a little lighter than the carrier bare. it isnt the stock carrier, or the mini spool that is weaker than the full spool, it is the pin you have to use with the mini that is the weak part.

Mikey14
Dirt Freak

Total posts: 265
posted March 24, 2005 06:43 AM  
using a full spool vs. a mini with a stock carrier saves about 4 pounds of rotating weight. Depending on the spool. Alone its a small difference but add that to lighter wheels, brake hats and rotors instead of stock, lighter lug nuts, second gear removed from the tranny, a lighter clutch and it all adds up.

Istock66
unregistered Total posts: 265
posted March 24, 2005 08:15 AM           send a private message to Mikey14   Edit/Delete Message   Reply w/QuoteBBBBBB
I had 6.00 richmond gears with a mini spool.

And at the same time bought lightened 6.00 gears with a full steel spool, not the ultra light but light.

The exact diff was 9.8 lbs for the complete chunks with yokes on etc.

The ultra light spool would be another -3 lbs.


BRIANSTINNY2
Dirt Roller

Total posts: 7
posted April 21, 2005 09:41 PM  
I RUN A 383 STROKER ! GM 8,5 INCH C- CLIP REAR END & MINI SPOOL ,SLAMMING AN AWSOME 420+PONIES TO IT CONSTANTLY GOING ON 2 YEARS.KILLER DUDE NO PROBLEMS YET. BUT OPINIONS VARY!

BunnMan
Dirt Newbie

Total posts: 4
posted April 22, 2005 12:58 AM  
At the risk of sounding junkyardish here, why not weld the stock carrier together? Sure is cheaper than buying spools and seems about bullet proof strong to me. Is it just a weight thing? Aren't most of us after rear percentage anyway?

Thanks and God bless,

-BunnMan

340duster
Dirt Maniac

Total posts: 195
posted April 22, 2005 10:49 AM  
Nailandgo
If you can afford it buy the full spool, for reliability and weight. As far as a performance difference you likely won't notice it. If you can use the $80 on something that will improve your lap times spend it on that

340duster
Dirt Maniac

Total posts: 195
posted April 22, 2005 10:51 AM  
Bunnmann - for the $20 to buy a minispool you are a way further ahead. Welding cast iron is difficult and it will usually fail after a while.

BunnMan
Dirt Newbie

Total posts: 4
posted April 22, 2005 01:02 PM  
I see. Mine's welded and has been for more than a few seasons with lots of feature wins and a track championship...then I bought the car . I just welded up the carrier in a replacement rear like the guys that ran this one did and was wondering if there was a problem there I couldn't foresee. Had to replace it due to the left housing pulling out and busting the center member in half because we installed C-clip eliminators and didn't realize the tubes needed to be welded to the center after such a job. Live and learn I guess. I think I'll stick with welding carriers for awhile though as I can run a real good weld that will hold up at least as well as the job the former owners did with the last one. Should I run into any trouble with it, twenty bucks will provide an easy solution. Thanks for the reply.

God bless,

-BunnMan

JESUS CHRIST <-- so powerful the liberals are pushing for an eight day waiting period.

john7771
Dirt Roller

Total posts: 14
posted April 22, 2005 02:17 PM  
I"ve run a mini spool and my first year out a friend told me I would break it and I did. They break at the sharp corner where the small dia. meets the large dia. Welded up a stock carrier with nickel rod and it has held for three years with progressivly stronger engines.

nailngoracing
Dirt Maniac

Total posts: 170
posted April 25, 2005 08:40 PM  
we ran the GM...welded up and it lasted until we hooked up the dished piston 355 salvage yard engine....then it twisted both shafts in two..so now we installed a ford floater for safer and hopefully more consistant.. i thought of cutting open the carrier to weld the spiders but a found full spools as cheap as 75.00 and saved me hours of labor.

    

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