anyone tried a spool in the front axle for drag racing - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 9 (permalink) Old 04-06-2010, 03:45 AM Thread Starter
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anyone tried a spool in the front axle for drag racing

has anyone tried it? im thinking about ways to improve my 60 foot times and definitly dont want a spool in the rear axle.

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post #2 of 9 (permalink) Old 04-06-2010, 05:51 AM
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I only ever launched one fast truck in 4wd, and vowed to never do it again. You get to much torque steer and it's a sure recipe for disaster even after addidng better steering and front end components.

PS. this truck dynos 560hp and 980ftlbs at the rears, and had no need for a spool in 4wd?
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post #3 of 9 (permalink) Old 04-06-2010, 01:47 PM Thread Starter
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when my truck ran 12s i launchd it dozens of times and never had an issue with torque steer. if anything a spool would help with that anyway because torque would be delivered evenly to both front tires...

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post #4 of 9 (permalink) Old 04-06-2010, 04:03 PM
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I would say if you aren't going to do a spool in the rear you sure as hell dont want one in the front. The only way you could turn without hopping would be to run the hubs with the vaccum and with that there is no real guarantee that the hubs will engage like they are supposed to. If you don't take out the hubs to turn you will end up with a lot of binding. Are you doing the ratchet strap trick for the front springs? What tires are you running while at the track?

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post #5 of 9 (permalink) Old 04-06-2010, 05:50 PM Thread Starter
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the only reason i dont want one in the rear is because it would be engaged all the time. having one in the front it would only be engaged when i either manually lock the hubs or use the electronic shift on the fly, which would only be at the track. i use the shift on the fly right now after i do my burnout and disengage it after the traps, it engages and disengages like its supposed to every time. id swap the front axle back to the stock diff for winter time since i use 4x4 often that time of year. i havent done the ratch strap trick, i dont think it would help with my issue and that is the left front tire spinning on a hard launch. i have 325 60 18 nitto terragrapplers right now...

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post #6 of 9 (permalink) Old 04-06-2010, 09:43 PM
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I believe that even if you have the SOTF dis-engaged it will still hop like mad trying to turn. You may try the ratchet strap trick and see if it helps. You have to think of it like the pulling trucks and so forth they put a solid suspension on it to take away the variations with articulation that would cause a wheel to spin. So if you compress the front end and hook straps to keep it compressed then there should be much room for the springs to flex and should cause even distribution between the two tires.

I would also look at trying to get some softer tires for the track cause if I remember right those nittos are fairly stiff in the tread pattern and though they are kind of a wide block type pattern they may not be hooking the best. You could also try airing them down a bit. It just depends on how bad you want those lower 60ft times.

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post #7 of 9 (permalink) Old 04-06-2010, 09:55 PM Thread Starter
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with the shift on the fly in 2wd the hubs and t case both unlock

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post #8 of 9 (permalink) Old 04-06-2010, 10:07 PM
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i would think a selectable locker would be better but it may not be up to the task. i know dodge guys have broke ARBs, E-lockers, tru-tracs, etc on front D60s.

the spool should be fine as long as the hubs unlock at the end of the track before you turn.

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post #9 of 9 (permalink) Old 04-07-2010, 12:59 AM
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Quote:
Originally Posted by SICKS-O View Post
with the shift on the fly in 2wd the hubs and t case both unlock
That is what I was saying about the hubs unlocking via the switch. I personally wouldn't trust that method to make sure my 4wd was in cause those o rings in the hub fail sometimes. I know my wifes ex has one hub that won't engage like its supposed to unless we manually put it in.

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