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Old 02-09-2010, 01:31 PM   #1891
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So I'm not liking the tension on the rear diff belt. I've been reading that everyone chooses to run the belts as loose as possible to prevent any driveline binding.

My problem is that just as I roll the car forward on my dinning room table, I can see the belt walk across (from left side to right) the silver cog in front of the rear diff very quickly. Both cogs seems to be in perfect alignment but the best seems just too loose to me. The belt doesn't come off or anything but it worries me a bit lol.

Will this not be an issue when the car is under it's own power or do I need to take apart the whole rear to change the notches I have it set in??? Car is new and I haven't even fired up the engine yet.

Thanks!
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Old 02-09-2010, 01:53 PM   #1892
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So I'm not liking the tension on the rear diff belt. I've been reading that everyone chooses to run the belts as loose as possible to prevent any driveline binding.

My problem is that just as I roll the car forward on my dinning room table, I can see the belt walk across (from left side to right) the silver cog in front of the rear diff very quickly. Both cogs seems to be in perfect alignment but the best seems just too loose to me. The belt doesn't come off or anything but it worries me a bit lol.

Will this not be an issue when the car is under it's own power or do I need to take apart the whole rear to change the notches I have it set in??? Car is new and I haven't even fired up the engine yet.

Thanks!
I assume by "silver cog" you are talking about the aluminum brake pulley. I run my belts loose. I would not worry about it. It will be almost impossible to have the belt come off as the rear diff will prevent it from happening. You can run it a bit tighter if you want. It isn't that involved to remove the 4 screws and lift out the piece to adjust the belt tension.
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Old 02-09-2010, 08:55 PM   #1893
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are you positive about that
they feel more like a 40/42 shore
Wow if they feel like 40's to you, you need to send us some of your soft tires . They are 35's in the evo 2 wc kit.
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Old 02-10-2010, 01:09 AM   #1894
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i had a couple of people check them aswell and they all said they feel like 40-42 aswell
hence why im asking the question
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Old 02-16-2010, 08:36 AM   #1895
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Quick question, if you had your way what is the one single part you'd improve on the Evo 2?
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Old 02-16-2010, 09:52 AM   #1896
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Mid belt tension pully, not to good and keep twisting after a little use.
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Old 02-16-2010, 09:58 AM   #1897
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Smaller/lighter diffs.

Chovden: What problem are you having with the side belt pulley? I havent had an issue with any of the pulleys in over 3 years of running the RRR.
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Old 02-16-2010, 11:47 AM   #1898
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the plastic triangle seem to twist forsing the belt to jump of and run on the inside of the bearings, it has happened on my Evo2 and on my shimo.
Maybe I am doing something wrong?
I build it after the instructions but after a while the belts jumps off.
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Old 02-16-2010, 01:17 PM   #1899
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the plastic triangle seem to twist forsing the belt to jump of and run on the inside of the bearings, it has happened on my Evo2 and on my shimo.
Maybe I am doing something wrong?
I build it after the instructions but after a while the belts jumps off.
same thing happens to me except i run the frp triangle piece so i have to replace my center bulkhead to straighten it out again.
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Old 02-16-2010, 02:13 PM   #1900
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Mid belt tension pully, not to good and keep twisting after a little use.
I use the FRP one that came in the Evo 2 kit and I haven't really noticed any twisting but i'll take a look at it now that you've mentioned it.

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Smaller/lighter diffs.

Chovden: What problem are you having with the side belt pulley? I havent had an issue with any of the pulleys in over 3 years of running the RRR.
I have questions on smaller lighter diffs, i've seen discussion of composite diff gears and how well do you think they will hold up to the stresses of nitro racing? Will they be one of those "change before the main" type parts? Actually how often should i be changing my big steel diff gears now!?

I think the Capricorn car has composite gears in it's diffs.

What kind of issues would we face if we reduced the size of the internal gears of the diffs?

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same thing happens to me except i run the frp triangle piece so i have to replace my center bulkhead to straighten it out again.
!!?? Really?! hmm my side belt kept popping off at Ft Myers when i hit the outside board of the back stretch and i'm wondering if that is why!?
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Old 02-16-2010, 03:40 PM   #1901
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I use the FRP one that came in the Evo 2 kit and I haven't really noticed any twisting but i'll take a look at it now that you've mentioned it.

!!?? Really?! hmm my side belt kept popping off at Ft Myers when i hit the outside board of the back stretch and i'm wondering if that is why!?
I don't think I've ever let mine get bad enough to let the belt slip, but make sure you are running the right 384t belt and not the 387t belt.

If they were running clockwise like the last time I was there, those barriers are horrible to tap and hitting on your pipe side would pop the pipe into the front pulley and may stop it briefly enough while you are WOT for the belt to skip completely off. I think I've had this happen like once on the RRR ever and I run a really loose side belt (all of them actually)
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Old 02-16-2010, 06:26 PM   #1902
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...
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Old 02-16-2010, 06:30 PM   #1903
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sorry guys for coming on to your thread Mr. bosley doesnt think i should,does anyone else feel offended by me being here asking a simple question about the direction of the track in florida...

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Old 02-16-2010, 06:55 PM   #1904
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Have they ever raced the track backwards there ? maybe its the short shoot that you could hit and do that...
I don't think they have run it backwards in any official race. its funny you mentioned that because after the race this past week Toso and I were talking on how running backwards would be a very interesting race, especially if they only announced it just before the race. Also have not had an issue with side belt jumping off, but did have an exhaust spring eat up one side of the tensioner pulley.

I do not run my belts super loose like some, interesting note during the winternats that I also noticed on Toso's rear belt moving back and forth and I told him his rear rear belt was to loose, he told me to tighten it one notch and I did. The slightly tighter belt didn't affect the smoothness of his drive train. On high traction tracks if belt is too loose, it could skip and start unnormal wear. Just my opinion
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Old 02-16-2010, 07:31 PM   #1905
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Quote:
Originally Posted by YmeBP View Post
I use the FRP one that came in the Evo 2 kit and I haven't really noticed any twisting but i'll take a look at it now that you've mentioned it.



I have questions on smaller lighter diffs, i've seen discussion of composite diff gears and how well do you think they will hold up to the stresses of nitro racing? Will they be one of those "change before the main" type parts? Actually how often should i be changing my big steel diff gears now!?

I think the Capricorn car has composite gears in it's diffs.

What kind of issues would we face if we reduced the size of the internal gears of the diffs?



!!?? Really?! hmm my side belt kept popping off at Ft Myers when i hit the outside board of the back stretch and i'm wondering if that is why!?


I very rarely have had the side belt pop off, or pop over the tensioner. It has happened, but very rarely.

Regarding the diff gears: I don't know how well the composite diff gears will last. The stock metal gears pretty much last forever.
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