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Old 03-11-2011, 12:32 PM   #601
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Anxious for the weather to break here in NW Ohio so I can do some track testing.
What track do you race on?

Got any pictures of it?
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Old 03-11-2011, 01:13 PM   #602
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What track do you race on?

Got any pictures of it?
There is an aerial movie of the track on the bottom of this link.
http://www.racersoftoledo.com/photo_gallery.html
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Old 03-11-2011, 03:50 PM   #603
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isnt the 30110 the stock 51 tooth?

I am looking for the 47 tooth spur.

Thanks, Jonathan
I don't know if their any spur gear that will work with that diff.
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Old 03-11-2011, 07:38 PM   #604
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I really like the Ultra GTP2, but I'm not a big fan of the stock body or after market bodies that I've found. Can anyone tell me if someone makes a late model muscle car (mustang, camero, etc.) body for this car?
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Old 03-11-2011, 11:00 PM   #605
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so if you use the center diff you stick with the 51 tooth spur then? Are there no gearing options for the spur?

Thanks, Jonathan
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Old 03-11-2011, 11:52 PM   #606
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I really like the Ultra GTP2, but I'm not a big fan of the stock body or after market bodies that I've found. Can anyone tell me if someone makes a late model muscle car (mustang, camero, etc.) body for this car?
Check out IGT Hobbies, they've got quite a selection of lids for GT8s. They also offer free shipping.
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Old 03-11-2011, 11:55 PM   #607
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so if you use the center diff you stick with the 51 tooth spur then? Are there no gearing options for the spur?

Thanks, Jonathan
Check IGT Hobbies, they've got quite a few parts and upgrades for GT8s. I knew they carry other pinion gears options but as for your spur gear, I don't think there's much available. It all depends on the center diff that you are using but I've only seen 46T and 48T spur gears. I'm sure someone else will chime in with further info. Good Luck!
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Old 03-12-2011, 12:20 AM   #608
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There is an aerial movie of the track on the bottom of this link.
http://www.racersoftoledo.com/photo_gallery.html
Oh, now I get it.

I've heard a lot about your track there from a good friend that raced GT there.



He turned the fastest lap time during the A Main of: 24.160, said it was a very fun track. Were you in this race too?
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Old 03-12-2011, 02:58 AM   #609
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Default Center Diff

I'm away at Sea so excuse the guess work here as I don't have my OFNA with me... Can someone tell me if this is the right center diff its for the Ultra LX One (so do the LX One and GTP2E share parts?) , and will it install into the stock mounts in the GTP2E, there is the OFN30110 plastic 51T and the OFN31040 metal 51T Spurs so which is preferred i dunno and I haven't seen other choices... Some speculation to a center Diff's worth but theres more positive feedback for this mod than negative. Any info to shed some clarity here would be great, Thanks.

My car is going to be for straight line fast


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Old 03-12-2011, 05:05 AM   #610
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Yes, the ofna LX-1 and GTP share a lot of parts.

I'm pretty sure just about any of the larger "Ofna" sized center diffs can work. So Ofna, Jammin, HotBodies, Kyosho. Smaller ones like AE, Mugen, etc. can work too but will need to have quite a few shims, so I'd stick with the larger ones.

I have never used the 2-piece spurs like on the stock GTP or LX-1, but it seems like a 1-piece spur would be more durable and have greater variety of spurs available. Something like this: http://cgi.ebay.com/Jammin-X2-CRT-Tr...item2a0eba079c
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Old 03-12-2011, 06:12 AM   #611
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Default Center Diffs???

I don't think center diffs are a good thing with onroad cars unless there is no traction. Running a center diff will allow the front tires to spin coming out of corners slowing exceleration and steering response. This will overheating the front tires causing wear, less steering and slower exceleration. I don't know of very many competition 4wd onroad cars that come with a center diff. Guys converting offroad vehicles have the center diff. We just tested a converted buggy to onroad and he was seeing front tire wear after the third pack. This was on a slippery and cold track(38F). He now has a spool to replace the center diff. All the info on how to convert and the different gearing has already been posted.
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Old 03-12-2011, 07:35 AM   #612
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Originally Posted by ml8163 View Post
I really like the Ultra GTP2, but I'm not a big fan of the stock body or after market bodies that I've found. Can anyone tell me if someone makes a late model muscle car (mustang, camero, etc.) body for this car?
How about a C4 Vette?

http://www.igthobbies.com/product_p/dpk0121.htm
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Old 03-12-2011, 12:29 PM   #613
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That one is really nice on a big scale.
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Old 03-12-2011, 05:28 PM   #614
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Nice!

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Old 03-13-2011, 12:41 AM   #615
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I don't think center diffs are a good thing with onroad cars unless there is no traction. Running a center diff will allow the front tires to spin coming out of corners slowing exceleration and steering response. This will overheating the front tires causing wear, less steering and slower exceleration. I don't know of very many competition 4wd onroad cars that come with a center diff. Guys converting offroad vehicles have the center diff. We just tested a converted buggy to onroad and he was seeing front tire wear after the third pack. This was on a slippery and cold track(38F). He now has a spool to replace the center diff. All the info on how to convert and the different gearing has already been posted.
What weight oil was in the center diff? Perhaps the oil was too light? If it still was runing the buggy diff fluid (guessing 7K) it is too light. Most GT8E racers start at a 100k. The front tire wear you speak of is because of the center diff unloading all the power to the end with the LEAST TRACTION. Try the test again with heavier oil and the results may be positive.

Just a thought, Full scale (1:1) rally cars have center diffs and they race on asphalt too. I know you meant R/C cars, just wanted to provide an example.

The center diff, may not be the solution for some, but I have raced with/and without one and am 100% certain that for my application it is THE ticket.

For me, I find it's much easier to drive faster, lay the power down eariler, and have consistent lap times with the center diff installed.

Good luck!
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