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Understanding F1 Tuning: Letís break it down

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Understanding F1 Tuning: Letís break it down

Old 04-17-2018, 12:36 PM
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If you're creating a SPOOL--why not just take all the diff balls out and tighten it down??
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Old 04-17-2018, 01:43 PM
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Originally Posted by Tim Neja View Post
If you're creating a SPOOL--why not just take all the diff balls out and tighten it down??
1 extreme side load on bearings, they don't last long
2 risk of pulling the threaded stud out of a carbon axle
3 no weight savings
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Old 04-17-2018, 04:00 PM
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Originally Posted by miller tyme View Post
1 extreme side load on bearings, they don't last long
2 risk of pulling the threaded stud out of a carbon axle
3 no weight savings
The only bearing you'll be side loading is the thrust bearing which is designed to take it.
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Old 04-17-2018, 04:07 PM
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I did something like that on an old ae tc3 diff. Took all the balls/plates and thrust bearing out and just drilled a couple of holes through the diff halfs. The bolt goes through the diff halfs and spur gear. Pretty sure i tapped one half so no nut required.
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Old 04-17-2018, 05:38 PM
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If you take the balls out and lock the diff it will loosen unless its pinned. The biggest advantage to a spool diff would be weight loss. With 2.5 million in my gear diff it's for all practical purposes locked but its heavy. 25.5 motors lack balls they make good rpm but power is minimal so lightening the axle assembly plus the ability to hook up immediately could prove very beneficial. I just would like to try it if it's easy to use existing parts or I will just make my own to try but would prefer the later.
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Old 04-17-2018, 05:52 PM
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We used to rubber cement sandpaper to the diff rings and remove the diff balls in the XXXS to make spools. Don't have to crank down that tight to lock it. Though not sure how it would work on a completely round ring (XXXS was a D ring)
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Old 04-17-2018, 06:07 PM
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Originally Posted by gigaplex View Post
The only bearing you'll be side loading is the thrust bearing which is designed to take it.
thrust bearings slip, the cone rides on the inside ring of bearing, the outside of bearing supports the hub. To truly lock it down and tight enough so it does not loosen, it has to be cranked very tight, the load is applied to ALL components.
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Old 04-17-2018, 07:32 PM
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How are you guys making spools for the rear of the F1 cars and would this work for WGT-R cars
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Old 04-17-2018, 08:08 PM
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Well I"d get some E6000 and glue all the diff plates together---inner and outer and then simply bolt it together snugly. Instant "spool"!! And yes--it's the same kind of diff for WGTR cars.
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Old 04-17-2018, 08:46 PM
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Originally Posted by miller tyme View Post
thrust bearings slip, the cone rides on the inside ring of bearing, the outside of bearing supports the hub. To truly lock it down and tight enough so it does not loosen, it has to be cranked very tight, the load is applied to ALL components.
Maybe that's true for some diffs, but that's not how the thrust bearing works in the Associated F6 (only F1 diff I've personally built). None of the conventional bearings would have any side load.
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Old 04-18-2018, 01:26 AM
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To lock my xray differential, I removed my balls and replaced the thrust bearing with shims. No problem tightening it down. Certain spurs need modification, if they have increased width around the center hole. To save some weight, you could find some bushings to replace the two bearings between the diff halves.

Most racers at my local track are locking them in similar fashion. Haven't seen any issues with it so far.
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Old 04-18-2018, 05:54 AM
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Here is a spool option.
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Old 04-18-2018, 09:34 AM
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Originally Posted by Khador12 View Post


Here is a spool option.
That's what I did. Then I can have my ball diff option as well. Actually cheaper than ruining the ball diff and then needing it some day.
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Old 04-18-2018, 09:36 AM
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There ya go!! Instant spool!! I was thinking you could go really old school with an axle from the 70's--and two left side hubs instead of trying to lock up a diff!! And you've found the option!! Simple!!
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Old 04-18-2018, 09:43 AM
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Originally Posted by Khador12 View Post


Here is a spool option.


This is me 1/2hr ago.
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