FAQ Search Memberlist  Register  Profile P.M. Log in

greetings          OFNA Nitro Talk Back Forum Forum Index -> Ultra LX Series View previous topic :: View next topic   Author Message mechanike Joined: 05 Sep 2011 Posts: 13 Location: cary il Posted: Mon Sep 05, 2011 9:24 am    Post subject: greetings hey all!just joined.just got done putting togather an ofna lx comp(i believe)with an 2.7 o.s. supertigre and woooose!what a low end beast!the engine came with a wore 13t so it screams on take-off as well as when you let off.i found a 15t from my old Acme Conq.that somehow fit but must of been the wrong pitch or it don't like the steel spur cause the alum endbell is throwing silver everywhere!anyway thanx to motion machine displaying the right part# i ordered a 16t instead of a 18t cause you guys said it munches clutches! anyway my Actual question is,,,,,,are the f&r diffs suppost to have a quarter turn of play in them?thanx ahead of time. Back to top Author Message David S. Joined: 04 Apr 2008 Posts: 374 Posted: Tue Sep 06, 2011 9:38 am    Post subject: Welcome. The differentials should only have a slight ammount of play, 1/4 turn is excessive. You may want to tear them down and inspect them. Back to top Author Message mechanike Joined: 05 Sep 2011 Posts: 13 Location: cary il Posted: Tue Sep 06, 2011 9:49 am    Post subject: thanx much will do,,,,,,,,,,, Back to top Author Message PROMOD64 Joined: 07 Sep 2011 Posts: 11 Location: United States Posted: Wed Sep 07, 2011 3:31 am    Post subject: Super Tigre Which Tigre motor are you using? Back to top Author Message mechanike Joined: 05 Sep 2011 Posts: 13 Location: cary il Posted: Wed Sep 07, 2011 4:32 am    Post subject: yeah its a g-27cx .27 supertigre i got on ebay for $50 shipped,,,,,,,,,,,thing sounds like its for a plane. Back to top Author Message PROMOD64 Joined: 07 Sep 2011 Posts: 11 Location: United States Posted: Wed Sep 07, 2011 4:36 am    Post subject: Motor It is a plane motor Back to top Author Message mechanike Joined: 05 Sep 2011 Posts: 13 Location: cary il Posted: Wed Sep 07, 2011 4:40 am    Post subject: no wonder why it sounds that way!!! is it ok to use 30% nitro?it sure seems to enjoy it. Back to top Author Message PROMOD64 Joined: 07 Sep 2011 Posts: 11 Location: United States Posted: Wed Sep 07, 2011 4:44 am    Post subject: Fuel... I have always heard to use 20%. Back to top Author Message PROMOD64 Joined: 07 Sep 2011 Posts: 11 Location: United States Posted: Wed Sep 07, 2011 4:46 am    Post subject: Fuel... While 10% to 40% is the typical percentage of nitro in nitro fuel, you can buy fuel with as much as 60% nitro or with 0% nitro (FAI fuel). Most RC cars and trucks use 10%-40% nitro blends. RC airplanes may use lower nitro blends of 5%-10% nitro. There are also RC engines that run on regular gasoline mixed with motor oil or diesel fuel (these are engines with spark plugs rather than glow plugs) as well as jet-turbine engines that use propane or kerosene. These are specialty radio controlled models and not the kind most often sold in hobby shops. Back to top Author Message PROMOD64 Joined: 07 Sep 2011 Posts: 11 Location: United States Posted: Wed Sep 07, 2011 4:47 am    Post subject: More full.... The percentage of oil might range anywhere from 8% to 25% with 15%-20% being the typical amount of oil found in nitro fuel. There is some debate as to whether an RC aircraft that often runs at wide open throttle during most of its run needs a higher percentage of oil than an RC car that only runs at full throttle for short spurts. An RC car or truck with a hopped-up engine that does a lot of high speed racing may need a higher oil percentage than one running a stock engine and not involved in professional racing. Back to top Author Message PROMOD64 Joined: 07 Sep 2011 Posts: 11 Location: United States Posted: Wed Sep 07, 2011 4:48 am    Post subject: More fuel stuff... http://rcvehicles.about.com/od/nitro/f/nitrofuel.htm Back to top Author Message mechanike Joined: 05 Sep 2011 Posts: 13 Location: cary il Posted: Wed Sep 07, 2011 5:05 am    Post subject: hey thanks for the link i was looking around to see if i can add alittle chainsaw oil but i'll refrain,,,,,,,,,,,,,,, Back to top Author Message PROMOD64 Joined: 07 Sep 2011 Posts: 11 Location: United States Posted: Wed Sep 07, 2011 5:12 am    Post subject: No chainsaw Good...no chainsaw oil Back to top Author Message mechanike Joined: 05 Sep 2011 Posts: 13 Location: cary il Posted: Wed Sep 07, 2011 8:01 am    Post subject: well guys looks like the diffs are fine. all metal ring gear/pinion.inside the carrier the side gears/pinion gears no play really at all.well greased.its just the space between the dogbones! and they are true and even.when i had it in my hand and held both sides the pinon moved barely.is it the comps that have all metal gears through-out or did someone modify? Back to top Author Message David S. Joined: 04 Apr 2008 Posts: 374 Posted: Wed Sep 07, 2011 8:46 am    Post subject: The internal gears on the Ultra series differentials are all metal. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         OFNA Nitro Talk Back Forum Forum Index -> Ultra LX Series All times are GMT - 9 Hours Page 1 of 1 Jump to: Select a forum OFNA COMMUNITY----------------General DiscussionFavorite Racing & Bashing SpotsPositive OFNA FeedbackJobs At OFNA OFNA ELECTRIC ON-ROAD----------------On-Road Lounge1:10 Electric Sedan1:8 Electric SedanBrushless Motors & ESC Info OFNA ELECTRIC OFF-ROAD----------------Off-Road LoungeJammin 1:10 Electric SCHyper 1:10 Electric SC1:8 Electric SC/Truggy/BuggyBrushless Motors & ESC info OFNA NITRO ON-ROAD----------------On-Road LoungeDM-ONE & GTPHyper One SevenHyper GPX4CD3LD3 OFNA NITRO ENGINES----------------Engine LoungeHyper EnginesPicco EnginesForce EnginesJL Engines OFNA NITRO OFF-ROAD----------------Off-Road LoungeHyper Short Course NitroHyper 9 ProHyper 8 & 8.5 Pro & RTRHyper ST TruggyHyper 7Jammin Buggy & Truggy/Mini Pro & RTRUltra MBX Comp SeriesMutilator TruggyDirt OvalUltra LX SeriesRavager9.5 Buggy SeriesBlazer SSTTitanMonster Pirate OFNA PIT TIPS LIBRARY----------------OFNA Pit Tips  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum