RE: .28 in a funfactor? oh dear....  
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RE: .28 in a funfactor? oh dear.... - 8/22/2005 5:17:52 PM   
poor judgement



Posts: 2065
Joined: 4/16/2004
From: Cleethorpes, UNITED KINGDOM
Status: offline 		i ran it with as tight a mesh as i dared, wasnt quite binding. the clutch slip has backed off loads with this 11t 1st gear. its definately the right ratio for 1st - instant takeoff, wheelies when u want to show off etc. just frustrating.

spoke to the guys i got the bits from tonight, they said to send in the gears and bearings and theyd have a look. dunno what they expect to see... but the bits are posted. i ordered some new 11/15 and 12/16 sets from ho bao. the 12 might do me as a single speed setup... really am sick of messin about with it now tho.

the gen spurs are fine for what its worth, still not a mark on them.

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       Post #: 201

RE: .28 in a funfactor? oh dear.... - 8/22/2005 5:40:23 PM   
rolland


 

Posts: 794
Joined: 8/15/2004
From: Tacoma, WA, USA
Status: offline 		There is also the possibility that an 11T first gear is to low. Try the 12T before you go back to the 11T. That engine does produce alot of low end torque.

How are the diff's holding up?


rolland

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       Post #: 202

RE: .28 in a funfactor? oh dear.... - 8/22/2005 6:17:51 PM   
poor judgement



Posts: 2065
Joined: 4/16/2004
From: Cleethorpes, UNITED KINGDOM
Status: offline 		too low? hmmm, not something i thought about tbh. im guessing that top speed is about mid 20s mph with the 11t if that helps. it is still running on the rich side tho, just to keep the throttle in check, it gets a bit bloody lively... tuned right id say 30 is realistic with the 11t

too low wouldnt damage the clutch bell bearings tho would it? remember the gen spurs are 43/39, which are only 1t off the ct4s spurs, and of course the bigger & heavier wheels. the clutch was warm tho, nothing like as hot as the cen one got, which was on some other (cheap) bearings with no bearing probs running 11 and 14t 1st gear.

i will try the 12t first tho, see how it goes.

amazingly the diffs are fine rolland, not a mark on them. they are the optional heavy duty ones. maybe they are made from the same stuff as the genesis spurs... i can get pics if u like! i was expecting them to die straight away too mate. i even have a spare hd set here!

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       Post #: 203

RE: .28 in a funfactor? oh dear.... - 8/22/2005 6:39:21 PM   
rolland


 

Posts: 794
Joined: 8/15/2004
From: Tacoma, WA, USA
Status: offline 		I know that I go through 11T pinions faster that 12T pinions with my OS .18 and I really don't notice a speed difference between the 11T and the 12T. I had assumed it was caused from the increased torque of the OS engine.
The bearings could have been faulty or they just couldn't handle the instant torque that was hitting them with the .28 and the 11T.
As far as how fast it should go I have no idea, you are doing something that few people have done and the ones that have done it have moved onto something else.

Thats good to hear about the diffs. I really didn't want to deal with trying to fit T-Maxx diffs in my truck. Which I am pretty sure could be done, there is that much of a size difference.


rolland

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       Post #: 204

RE: .28 in a funfactor? oh dear.... - 8/23/2005 12:12:48 AM   
rolland


 

Posts: 794
Joined: 8/15/2004
From: Tacoma, WA, USA
Status: offline 		Here is a list of parts that I used.
Diff cups, http://www.acehardwarehobbies.com/2.2/catalog/product_info.php?cPath=1_2_346&products_id=6652
These need to be shortened 1.5mm and flats ground to slide into diff. Taper ends in for clearance and clearance the underside of the arm a little bit.

Nuckles, http://www.acehardwarehobbies.com/2.2/catalog/product_info.php?cPath=1_2_346&products_id=6607

Axles you will need 2 of these, http://www.acehardwarehobbies.com/2.2/catalog/product_info.php?cPath=1_2_346&products_id=6659 and the pins need to be filed down so that they do not protrude out of the diff cups.

Traxxas pivot balls, http://www2.towerhobbies.com/cgi-bin/wti0095p?FVSEARCH=4933&FVPROFIL=++

Traxxas piviot ball caps, http://www2.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=4934&FVPROFIL=++&search3=Go
The spacers that Traxxas uses on their pivot balls is not long enough so I used some extra shock pistons as spacer, 2 on the top and 1 on the bottom.

So far every thing is working great but I need to get some longer turnbuckles to hook up the steering.

I found my camera but I keep getting DNS errors every time I try to upload. Even if I try to upload to my gallery.



rolland

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       Post #: 205

RE: .28 in a funfactor? oh dear.... - 8/23/2005 12:26:05 AM   
poor judgement



Posts: 2065
Joined: 4/16/2004
From: Cleethorpes, UNITED KINGDOM
Status: offline 		try editing an existing post to upload ur pics. oh, they arent too large are they? editing worked for me, i had the same prob.

dying to see some pics man! thanks for the part numbers too, and be sure to give it a good thrash test mate... does this mean a big block is coming...?

re my clutch bearings... should have mentioned that they are/were plastic sealed. after one went on me i swapped it out for my only spare, which is steel sealed, that one seems ok, but the other plastic one then failed too. would it maybe be worth trying lighter clutch springs along with some steel sealed bearings? try to get the clutch to bite sooner and therefore reduce slip... thinkin out loud here, not sure if it will make much difference.

oh yea, spurs are lookin great, but 1st doesnt like to be turned... another bearing by the looks of it. maybe the engine is taking its toll now...

any suggestions on bearings that would take it? ive seen some nice ceramic ball ones, but they are a bit pricey, nice tho. maybe steel sleeved would be enough.. sigh... i just dunno anymore!!!!

cmon rolland lets see these shafts man!

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RE: .28 in a funfactor? oh dear.... - 8/23/2005 12:33:25 AM   
rolland


 

Posts: 794
Joined: 8/15/2004
From: Tacoma, WA, USA
Status: offline 		Trying again

rolland


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RE: .28 in a funfactor? oh dear.... - 8/23/2005 12:39:04 AM   
poor judgement



Posts: 2065
Joined: 4/16/2004
From: Cleethorpes, UNITED KINGDOM
Status: offline 		lookin very nice!! i especially like the truck stand!

what wheels and tyres are they? hope they dont give u the spur eating trouble that i had... should be ok with the 18 tho.

oh one thing i noticed looking back at mine was that the plastic shafts are now quite twisted, can twist them by hand... a lot... it could well be acting as a good shock absorber for my diffs... are u on the standard diffs rolland?

< Message edited by poor judgement -- 8/23/2005 12:41:47 AM >

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RE: .28 in a funfactor? oh dear.... - 8/23/2005 12:53:56 AM   
rolland


 

Posts: 794
Joined: 8/15/2004
From: Tacoma, WA, USA
Status: offline 		The OS box is the perfect size for a truck stand.
I am not going to run those tires I took them off of my X-Factor for fitment. They are Imex Romulins with Losi LST tires with shaved foams for rock crawling.
I am going to run buggy tires first (they are cheap) and then order another set of the Romulins. Mainly because I have to do the rear first and I can get buggy tires that are about the same height.

I am running the machined cross shaft and the standard gears in the diffs.

I think I figured out the pic posting prob.

rolland

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RE: .28 in a funfactor? oh dear.... - 8/23/2005 1:00:07 AM   
poor judgement



Posts: 2065
Joined: 4/16/2004
From: Cleethorpes, UNITED KINGDOM
Status: offline 		lol, wow man couldnt u find any bigger tyres? and im not so sure u should plug it into the mains either!!

im having a rummage around in the uk for those shaft parts, bearings are just plain boring! prices are scary here tho...

what tyres are u looking at out of interest? and hows ur brake? mine took a bit more stopping with the bigger wheels... alloy brake helped, uprated servo sorted it.

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RE: .28 in a funfactor? oh dear.... - 8/23/2005 1:20:35 AM   
rolland


 

Posts: 794
Joined: 8/15/2004
From: Tacoma, WA, USA
Status: offline 		I need to get the buggy tires and longer turnbuckles for the steering before I really thrash it but so far the brake is holding up fine. I also have the aluminum brake seat and the metal disc and plug.
I never really thought about tire choices for my MT2 but I really like the looks of those Ofna Brick Pins but I am also thinking about the Zombiemaxx (real soft and sticky with a low profile). I also found asphalt tires (slicks) on buggy wheels. When I get tired of the buggy wheels or when the LHS has the parts in stock to finish my conversion I will probably go with the larger tire.


The link Scouser posted on the Hyper 7 uses the same length CVJ's as the Swift the only thing I am not sure about on the Hyper 7 parts is the shaft diameter of the diff cups. The Swifts are the same size at the MT2's.
Power Racing is no longer making the Swift but they sold the design rights to Rdlogics and they are re-introducing it as the SHO Buggy.

When you figure out the bearing problem let us know. I have know idea what the problem is.

rolland

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RE: .28 in a funfactor? oh dear.... - 8/23/2005 1:40:17 AM   
poor judgement



Posts: 2065
Joined: 4/16/2004
From: Cleethorpes, UNITED KINGDOM
Status: offline 		all looking and sounding good rolland, keep it going mate!

clutch bearing is heat, and the spur is just rubbing on the diff casing for some reason... feels smooth, just stiff, think its straight forward.

might just go with ceramic bearings to be sure... have to get 10 at a time tho, so will sell some on i think, cant see those failing quickly... i hope... theyre from the US tho, so gonna take a while to sort it out im afraid

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RE: .28 in a funfactor? oh dear.... - 8/24/2005 5:56:43 AM   
rolland


 

Posts: 794
Joined: 8/15/2004
From: Tacoma, WA, USA
Status: offline 		Is there a possibility that the clutch is shimmed a little too tight causing extra pressure on the bearings when the clutch bell is bolted on? I was thinking if the bearings are "pinched", even a little when the clutch bell is installed it will not allow them to rotate freely causing excess resistance which might be causing them to overheat. Just a thought.

I should be able to get the wheels and turn buckles this weekend. If I do I will give it a good thrashing and post the results. I am going to have to use adapters on the rear until my LHS gets the parts that I need to do the conversion.


rolland

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       Post #: 213