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Old 02-07-2012, 11:27 AM   #1
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Default 8th scale, no rear diff?

Why do 8th scale have no rear diff?
This seems a little counter intuitive for a high performance car!

Anyone care to explain the benefits if any?
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Old 02-07-2012, 11:41 AM   #2
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controlled drift of rear wheels
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Old 02-07-2012, 01:42 PM   #3
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Originally Posted by JamesHealey View Post
Why do 8th scale have no rear diff?
This seems a little counter intuitive for a high performance car!

Anyone care to explain the benefits if any?
Too much power for a diff in 1/8 onroad. Certain 1/10 are blowing diffs. A diff in 1/8 onroad would never survive.


Pass you soon...
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Old 02-07-2012, 01:51 PM   #4
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i don't think so!is a set up thing!a diff can survive in a 1/8 buggy!it's not a big deal for an on road machine!
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Old 02-07-2012, 02:09 PM   #5
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A diff is heavy what will give a power loss.

The trick is to go as fast through a corner so the inner wheel is lifted up like running a kart. Search on youtube to slow motion close ups and you will see that effect.
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Old 02-07-2012, 02:19 PM   #6
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Quote:
Originally Posted by JamesHealey View Post
Why do 8th scale have no rear diff?
This seems a little counter intuitive for a high performance car!

Anyone care to explain the benefits if any?
This is a little old, but the second paragraph sums it up nicely:

http://www.westcoastrccarracing.asn....ive_ratios.pdf
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Old 02-07-2012, 02:39 PM   #7
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Originally Posted by Roelof View Post
A diff is heavy what will give a power loss.

The trick is to go as fast through a corner so the inner wheel is lifted up like running a kart. Search on youtube to slow motion close ups and you will see that effect.
i search but no luck.can you sent a link?
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Old 02-07-2012, 03:01 PM   #8
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Originally Posted by GREGORY! View Post
i don't think so!is a set up thing!a diff can survive in a 1/8 buggy!it's not a big deal for an on road machine!
You ever try running a buggy on pavement and do a bunch of tight figure 8's on power; after you done listen to your diffs. Offroad does not have the traction that onroad has. I think that's what eats a diff.


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Old 02-07-2012, 03:09 PM   #9
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I know the WC 2009 video from Raywood has some nice slomo shots. Indded there is nothing to find but I searched for some action photo's and found this one:

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Old 02-07-2012, 06:01 PM   #10
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Accelaration out of corners. There's no diff, therefore no "diffing out". The car just moves forward.
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Old 02-07-2012, 06:11 PM   #11
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Quote:
Originally Posted by lil-bump View Post
Too much power for a diff in 1/8 onroad. Certain 1/10 are blowing diffs. A diff in 1/8 onroad would never survive.


Pass you soon...
If a diff in an 1/8 would be faster/better all 1/8s would have diffs. Designing a reliable 1/8 diff isn't a challenge.
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Old 02-07-2012, 06:22 PM   #12
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YOUR BASICALLY USING THE FRONT END TO PULL THE REAR END AROUND IN ONROAD. IT JUST FOLLOWS
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Old 02-07-2012, 08:35 PM   #13
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the 1/8 2wd used a diff, and there was a time that some people tried a diff with 1/8 4wd, but for 4wd the spool rear was faster. someone older than me can tell you when, but i think diff rears in 4wd were gone by the mid 90's?
fyi, if you lose the front belt, a rear spool is undrivably loose.
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Old 02-08-2012, 12:29 AM   #14
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Is this advantageous over 2 Wheel Rear Drive with a Limited Slip Diff?

As this is what appears to be in the "big" 1:1 F1 cars.

Or would they be using 4WD Rear Diff/Front 1 Way if the rules allowed?
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Old 02-08-2012, 01:35 AM   #15
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Due to super wide rear tires,

1. The car will enter corners understeer with rear differential on..

2. The car might "diff out" when exiting a corner under power.
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