R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 07-25-2005, 10:14 PM   #5776
Tech Elite
 
RCknight's Avatar
 
Join Date: Nov 2004
Posts: 2,270
Trader Rating: 5 (100%+)
Default Well, I'm still a rookie.

It could be that the chassis is tweaked. One thing to do is not tighten down the battery strap too much. The heat and the expanding of the battery can warp the chassis. Make sure the is some wiggle room between the battery and the strap. I have never had a "perfect" molded chassis and there has always been some wiggle on a flat surface. My guess would be the shock lengths or incorrect droop. The hooking during braking could just be lack of rear traction. Are you using a oneway?
RCknight is offline   Reply With Quote
Old 07-25-2005, 10:15 PM   #5777
Tech Elite
 
ChadCapece's Avatar
 
Join Date: Sep 2004
Location: CofC
Posts: 3,315
Default

How long are associated springs? In metric or standard.
ChadCapece is offline   Reply With Quote
Old 07-25-2005, 10:26 PM   #5778
Tech Elite
 
RCknight's Avatar
 
Join Date: Nov 2004
Posts: 2,270
Trader Rating: 5 (100%+)
Default AndrewD...

I'm running nearly the same setup. One thing I found is that the TC4 doesn't like a short wheel base. It makes the car hard to drive and if your new, I would go back to the longest wheel base. Is your track real smooth, is it a tight track? I run on med grip, tight, ozite track. I don't run any shims under the toe blocks, because my track is smooth. I also run three shims under the front inside camber link and two in the rear. I'm running purple and plaid tires though. I need less side bite. I like two shims on the steering rack and two shims for bump steer. I also like the car with a long front camber link. Unless your real smooth the longer link helps. You may also want to try two front shims and one rear. A roll center setup change you may want to try.
RCknight is offline   Reply With Quote
Old 07-26-2005, 12:28 AM   #5779
Tech Elite
 
andrewdoherty's Avatar
 
Join Date: Jan 2005
Location: ★Wylie, TX★
Posts: 3,763
Trader Rating: 47 (100%+)
Default

@rcKnight-I am not using a oneway. I am all for experimenting with the set up, but I have rebuilt this car twice now with two set ups with the same problem . . .so once I get the problem fixed I'll worry about fine tuning the setup. I may use your suggestions after I get this pull eliminated. When the guy at my track got my car tracking straight I know he didn't adjust the shock length, but when the digital calipers come in in a few days I will check them more accurately. I just rebuilt them today. In fact I went throught everything today and matched it exactly to the set up sheet I posted earlier. Check out the date on it As for the droop, if I back the screws all the way out and still have the pull is it safe to assume that the droop is not the problem? I will try loosening the battery strap. It seems that the car pulls the same amount to the left on aceleration as it does to the right on braking. Still fishing for this elusive problem. Its so strange that it is so regular after rebuilding teh whole car, changing set ups and rebuilding the shocks. Thhis is why I am thinking chassis, as it is a constant in all of this. Thanks agin for the thoughts RCKNIGHT. Keep'em coming. we'll figure this out if it kills me.

Andrew
__________________
"Whether you think you can, or think you can't, you're right." -Henry Ford
"[Driving] Genius is 1% inspiration, and 99% perspiration" -T.A. Edison
|◤Hobbywing◢|◤SpeedzoneUSA.com◢|◤Pro-One◢|
|◤ReflexRacing.net◢|◤Protoform◢|◤AVID R/C◢|
andrewdoherty is offline   Reply With Quote
Old 07-26-2005, 12:51 AM   #5780
Tech Master
 
BlackKat's Avatar
 
Join Date: Oct 2004
Location: Northside San Jose, CA
Posts: 1,335
Default

Hey,

How thick are the shims underneath the camber link? And how thick are the shims for underneath the pivot blocks? (the setup sheet leaves me to believe there seperate square, circle, triangle and X shims?...how do you tell the difference? are they just shaped differently)

I haven't gotten my car yet so I'm not clear on these things yet....Thanks!

-Dan

Last edited by BlackKat; 07-26-2005 at 12:20 PM.
BlackKat is offline   Reply With Quote
Old 07-26-2005, 01:11 AM   #5781
Tech Master
 
johnbull's Avatar
 
Join Date: Aug 2001
Location: Malta. G.C.
Posts: 1,762
Default

Andrew. I had a similar problem with a customer TC4 recently. Same thing- pulls one way on acceleration and the other on decelleration.

I eventually found it was play in the drive train. His IRS spoolhad worn badly on one side, so when he accelerated, for a split second one side was driving whilst the other was free. We replaced the spool and the problem was solved.

This can easily be happening with your CVDs. Check them out to see that They are both assembled right and both have the same amount of free play. And while you're at it, have a look at the back ones too.
johnbull is offline   Reply With Quote
Old 07-26-2005, 05:11 AM   #5782
Tech Elite
 
rcracenut's Avatar
 
Join Date: Sep 2004
Location: WIS
Posts: 3,363
Trader Rating: 52 (96%+)
Default

Quote:
Originally Posted by andrewdoherty
This is killing me. I have gone through my car twice and can't seem to get rid of this problem. When I accelerate, the car pulls hard left. When I brake, it pulls hard right. I have double checked my set up repeatedly. I am fairly certain that my tweak is the problem, although at this point I'm open to ANY suggestions. I have the ride height at 4.5mm, the camber all around at -1.5, the droop is set to 5 all the way around, and the toe is 0 in the front and 2.0 in the rear. Ill post the set up Im using in hopes someone can spot what I have missed repeatedly. The really frustrating part is that last week a veteran driver looked over my car and wrenched on it for a bit and eliminated the pull. At that time though, I had a set up that didn't have enough rear traction. . .I was sliding all around the track. So I switched to a proven set up for my track and now the pulling problem is back. I didnt get a chance to see exactly what he did, so now I'm stuck. I do know he was using a tweak board. So please . . .anyone . . .have some mercy on a rookie driver . . .what do I do? (I have intentionally refrained from listing all the things that I "know" it isn't becasue I know it must be some little thing I have over looked. I am open to any and all suggestions no matter how small, dumb, or complicated.
THE END (whew what a book I wrote!!)
Thankfully hopefull

Andrew
I had the same problem at a race this past winter. It turned out the outdrives were worn and caused the car to do the very thing you described. I went after everything as it sounds you did and nearly gave up hope. But then I noticed the outdrives were worn where the driveshafts rub against them . I replaced them and bingo, that cured it. Good luck.
rcracenut is offline   Reply With Quote
Old 07-26-2005, 05:25 AM   #5783
Tech Initiate
 
180sx's Avatar
 
Join Date: Jul 2005
Posts: 33
Default

hey guys i was thinking about purchasing a TC4 for 540pro and i have read that to be able to fit a 540j motor your have to dremil out the motor mount. have any of you guys had any trouble with mounting 540j motors?
180sx is offline   Reply With Quote
Old 07-26-2005, 06:24 AM   #5784
Tech Regular
 
GCT69's Avatar
 
Join Date: Apr 2005
Location: TRF
Posts: 412
Trader Rating: 10 (100%+)
Default Adjusting droop and height

I was following hHara and moore's set up for the front droop which is 6.5 and ride height which is 4.5, but when I adjusted the droop to 6.5 and try to adjust the height the spring is so compress but still could not get the 4.5 height, do I have to readjust the droop to a lower value and then adjust the height again? I'm using a white springs in the front and CS27 tires.
GCT69 is offline   Reply With Quote
Old 07-26-2005, 07:06 AM   #5785
Tech Master
 
johnbull's Avatar
 
Join Date: Aug 2001
Location: Malta. G.C.
Posts: 1,762
Default

Quote:
Originally Posted by GCT69
I was following hHara and moore's set up for the front droop which is 6.5 and ride height which is 4.5, but when I adjusted the droop to 6.5 and try to adjust the height the spring is so compress but still could not get the 4.5 height, do I have to readjust the droop to a lower value and then adjust the height again? I'm using a white springs in the front and CS27 tires.
Hara and Moore run HB Cyclones. Their geometry is probably very different to the TC4. May I suggest you copy a good set up out of the many in the AE webpage or Tony Phalan's Competition X.

180SX. It's an easy mod. All you need to do is enlarge the hole in the motor cam - 5 minute job with a drill.
johnbull is offline   Reply With Quote
Old 07-26-2005, 08:11 AM   #5786
Tech Adept
 
Join Date: Apr 2005
Location: Costa Mesa, CA.
Posts: 172
Default

Tony P: When is the car going to be ready for team drivers?
DS
Daryl Silva is offline   Reply With Quote
Old 07-26-2005, 08:27 AM   #5787
Tech Elite
 
Join Date: Sep 2001
Location: Newville,Pa
Posts: 2,152
Trader Rating: 7 (100%+)
Default

Quote:
Originally Posted by 180sx
hey guys i was thinking about purchasing a TC4 for 540pro and i have read that to be able to fit a 540j motor your have to dremil out the motor mount. have any of you guys had any trouble with mounting 540j motors?

Yes, you need to enlarge the hole where the can sets inside of the motor cam...
__________________
G's RC Raceway- Best off-road track on the east coast...period!!!

Pitman for Team Dallas Austin...
IMPACTPLAYR is offline   Reply With Quote
Old 07-26-2005, 08:32 AM   #5788
Tech Regular
 
GCT69's Avatar
 
Join Date: Apr 2005
Location: TRF
Posts: 412
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by johnbull
Hara and Moore run HB Cyclones. Their geometry is probably very different to the TC4. May I suggest you copy a good set up out of the many in the AE webpage or Tony Phalan's Competition X.

180SX. It's an easy mod. All you need to do is enlarge the hole in the motor cam - 5 minute job with a drill.
sorry I thought I was posting this on the pro-4
GCT69 is offline   Reply With Quote
Old 07-26-2005, 10:07 AM   #5789
Tech Elite
 
TPhalen's Avatar
R/C Tech Charter Subscriber
 
Join Date: Aug 2001
Location: Brookfield, CT
Posts: 2,793
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by Daryl Silva
Tony P: When is the car going to be ready for team drivers?
DS

Are you a team driver? Sometimes I crack myself up. Should be soon, Daryl. Gimme a call early next week and I'll update ya...
__________________
Tony Phalen
UF1 Team Lotus/Renault
RCDriver.com
CompetitionX.com
R Sector / F1 Paint Labs
TPhalen is offline   Reply With Quote
Old 07-26-2005, 10:11 AM   #5790
wyd
Tech Legend
 
wyd's Avatar
 
Join Date: Sep 2001
Location: Castle Mamba Max Pro. Feel its power!!!!!!!!!!
Posts: 20,906
Trader Rating: 48 (100%+)
Send a message via AIM to wyd
Default

If I put spacers under the front camber links will that give me a little more steering overall?
__________________
Castle Creations (Since 2005)
Bumps & Jumps RC (One of the best racing facilities around)
ST Racing Concepts (STRC) Great aluminum upgrades for many brands.
Custom Works (Best Oval Cars around). Too many titles to list
Shout out to: Sticky Kicks, CR Graphics and Race Ready Products
wyd is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Team Losi XXXS G+ with parts!! Team Orion V2 Hitec 5625 cola R/C Items: For Sale/Trade 9 06-18-2008 08:11 PM
BATTERIES - Team Orion 4200 SHO Team Cells (6 cell) packs................... For Sale 2-Bad Australia For Sale/Trade 0 03-21-2008 02:16 AM
New Items for Sale Tamiya F103gt Chassis Kit, Team Much More CTX-D, Novak, Team Orion Tsquare R/C Items: For Sale/Trade 14 04-17-2007 08:29 PM
>>> BRAND STINKING NEW NEVER RAN TEAM JAMMIN FACTORY TEAM FTE RACING BUGGY <<<< mach51 R/C Items: For Sale/Trade 5 01-25-2007 09:13 PM
F/S Team Associated Factory Team RC18T with Mamba Comp X Brushless and Extras ZeroCool101 R/C Items: For Sale/Trade 7 01-07-2006 01:54 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 11:02 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net

SEO by vBSEO 3.5.0