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Old 06-25-2013, 12:55 AM   #511
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Aza,

What are the Ulti combo fronts equivalent to? I use Ulti 37F/40R (99% of the time), so did you find 40R to work best with the combo fronts, or did you go to 37R?

Picking up some from Jay today, not sure what rears I should match them with?
Hey mate,

I found them best with 38 rears they wear good together and I have some ZAC project if you would like to try shoot me a pm if u would like some.
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Old 06-25-2013, 03:35 AM   #512
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Thank you Julius I will experiment with these setups.

Regards,
Frank.
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Old 06-25-2013, 06:59 AM   #513
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Some setups to try and test.

Enjoy.
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Old 06-25-2013, 06:14 PM   #514
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Hey mate,

I found them best with 38 rears they wear good together and I have some ZAC project if you would like to try shoot me a pm if u would like some.
Thanks, i picked up some Ulti Combos, will test these first.
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Old 06-25-2013, 11:18 PM   #515
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Hi,

I noticed in the setup sheet that it shows the option of running the diffs with either 2 or 4 of the small gears. What's the difference for example if you have 2 diffs filled with 30,000cst fluid, and one diff has the 4 gears and the other with 2 gears?
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Old 06-26-2013, 03:27 AM   #516
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Hi,

I noticed in the setup sheet that it shows the option of running the diffs with either 2 or 4 of the small gears. What's the difference for example if you have 2 diffs filled with 30,000cst fluid, and one diff has the 4 gears and the other with 2 gears?
Four gears would give more resistance, so only running two gears would be like running a lighter oil. People did this in the front diff of the HPI R40 back in its day...
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Old 06-26-2013, 06:30 AM   #517
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Originally Posted by shiston View Post
Hi,

I noticed in the setup sheet that it shows the option of running the diffs with either 2 or 4 of the small gears. What's the difference for example if you have 2 diffs filled with 30,000cst fluid, and one diff has the 4 gears and the other with 2 gears?
I always run 2 diff crowns, diffs feel smoother, never had any strip, and some weight saving benefits.

You need to double the diff oil rating, ie..

30,000cst 4 crown = 60,000cst 2 crown
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Old 06-26-2013, 06:49 AM   #518
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I always run 2 diff crowns, diffs feel smoother, never had any strip, and some weight saving benefits.

You need to double the diff oil rating, ie..

30,000cst 4 crown = 60,000cst 2 crown
I like the feel of 4 gears. Also when you're dealing with thicker diff oils your choices of various weights becomes very limited above 100K. It's personal preference thing.

Pass you soon...
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Old 06-26-2013, 08:47 AM   #519
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I like the feel of 4 gears. Also when you're dealing with thicker diff oils your choices of various weights becomes very limited above 100K. It's personal preference thing.

Pass you soon...
From my experience at our Toledo Track, Most all guys running sedan like the feel of 4 gears over 2, but like you said its all preference.
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Old 06-26-2013, 05:24 PM   #520
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Thanks for the replies regarding the diff gears. Much appreciated
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Old 06-27-2013, 04:08 AM   #521
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@ JJBinks: What tires are the Serpent guys running over at Toledo? (Brands/most popular compounds) I'm planning to put together a nitro program and this is one area I really don't know much about yet.
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Old 06-27-2013, 07:35 AM   #522
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@ JJBinks: What tires are the Serpent guys running over at Toledo? (Brands/most popular compounds) I'm planning to put together a nitro program and this is one area I really don't know much about yet.
On a normal day I run 38 fronts and 40 rears. When traction gets high I go to 40 fronts and 42 rears. In some cases I've used 38 fronts and 42 rears (tons of steering).


Pass you soon...
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Old 06-27-2013, 10:43 AM   #523
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On a normal day I run 38 fronts and 40 rears. When traction gets high I go to 40 fronts and 42 rears. Im some cases I've used 38 fronts and 42 rears (tons of steering).


Pass you soon...
+1 to that. In some rare cases in the past I have seen some sedans run 35 from 38 or 40 rears. but that is a rarity.
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Old 06-27-2013, 10:45 AM   #524
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@ JJBinks: What tires are the Serpent guys running over at Toledo? (Brands/most popular compounds) I'm planning to put together a nitro program and this is one area I really don't know much about yet.
Besides Compound the tires I see the most run at our track are Enneti and Matrix. I plan to run Enneti for the most part.
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Old 06-27-2013, 10:50 AM   #525
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Besides Compound the tires I see the most run at our track are Enneti and Matrix. I plan to run Enneti for the most part.
I normally run Enneti fronts. Enneti's fronts are the only tires I've found that can be used with the narrow hex drives up front. All other tires rub on the steering knuckles arms .

Pass you soon...
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