R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 09-10-2009, 06:59 PM   #1
Tech Adept
 
Join Date: Mar 2007
Posts: 142
Trader Rating: 6 (100%+)
Default front end pushing

I have an RC8 that just seems to want to push at fairly high speeds. I've gone through a few different tires, changed oil weights, shock positions, I have set camber at -2 but nothing really makes it any better. I do run a fairly dry track with not much traction, but still pushes quite a bit with a high traction track. I was wondering if hinge pin bushing positioning makes any difference in steering?
gnpower is offline   Reply With Quote
Old 09-11-2009, 06:26 PM   #2
Tech Elite
 
DOMIT's Avatar
 
Join Date: Oct 2007
Location: Fort Worth, Texas, USA, North America, Earth, Solar System, Milky Way Galaxy, Universe
Posts: 4,034
Trader Rating: 1 (100%+)
Send a message via MSN to DOMIT Send a message via Yahoo to DOMIT
Default

Quote:
Originally Posted by gnpower View Post
I have an RC8 that just seems to want to push at fairly high speeds. I've gone through a few different tires, changed oil weights, shock positions, I have set camber at -2 but nothing really makes it any better. I do run a fairly dry track with not much traction, but still pushes quite a bit with a high traction track. I was wondering if hinge pin bushing positioning makes any difference in steering?
Try raising the upper camber links... maybe softer swaybar... soften up the suspension.
__________________
Brad "DOMIT" Smith - I'm not fast, but at least I wreck a lot.
Unsponsored, but I use/recommend: XRay XB9, Alpha A852, Dynamite 053, Airtronics M11, Hitec 5955TG & 7955TG, ABEC 35 clutch and chassis bearings, PTRCRacing shock and diff fluids, Ready Rollers ceramic engine bearings. ** Team Terribles Region 9 coordinator. ** JOIN TEAM TERRIBLES! All racers welcome! PM me for details.
DOMIT is offline   Reply With Quote
Old 09-11-2009, 06:48 PM   #3
Tech Addict
 
razo125's Avatar
 
Join Date: Jan 2004
Location: FearFarm - Arizona
Posts: 663
Default

Quote:
Originally Posted by gnpower View Post
I have an RC8 that just seems to want to push at fairly high speeds. I've gone through a few different tires, changed oil weights, shock positions, I have set camber at -2 but nothing really makes it any better. I do run a fairly dry track with not much traction, but still pushes quite a bit with a high traction track. I was wondering if hinge pin bushing positioning makes any difference in steering?
as far as hinge pin bushing position are you talking about the rear hub position? Moving the rear hub backwards will give more side bite in the rear. Moving them forward will give more forward bite and it might help the car come around better if your pushing.

Where are you pushing? high speed corner entry or exit?
razo125 is offline   Reply With Quote
Old 09-11-2009, 06:54 PM   #4
Tech Apprentice
 
Join Date: Mar 2007
Posts: 74
Default

gnpower,

My buggy was pushing, and I removed some droop from the rear. Fixed the problem. Let us know what you find out.
glolar is offline   Reply With Quote
Old 09-11-2009, 07:27 PM   #5
Tech Elite
 
Zerodefect's Avatar
 
Join Date: Apr 2008
Location: Underground, Ohio
Posts: 4,305
Default

More info needed.

Can you post your entire setup? Be more specific where it's pushing, on power, off power, both?

Pics of track surface? Type? (Ie: dirt, hardpacked dirt, dusty, clay etc.)
What tires are you running?
Zerodefect is offline   Reply With Quote
Old 09-11-2009, 08:54 PM   #6
Tech Master
 
Join Date: Jul 2007
Location: Rossville Ga
Posts: 1,398
Trader Rating: 10 (100%+)
Default

For push you can loosen the front springs and tight the rear spring a little therefore when comeing off gas going into corner weight shift forward. You can also lighten rear diff fluid. Hope this helps.
bigde2001 is offline   Reply With Quote
Old 09-12-2009, 06:06 PM   #7
Tech Adept
 
Join Date: Mar 2007
Posts: 142
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by razo125 View Post
as far as hinge pin bushing position are you talking about the rear hub position? Moving the rear hub backwards will give more side bite in the rear. Moving them forward will give more forward bite and it might help the car come around better if your pushing.

Where are you pushing? high speed corner entry or exit?
Mid to exit.
gnpower is offline   Reply With Quote
Old 09-12-2009, 06:08 PM   #8
Tech Adept
 
Join Date: Mar 2007
Posts: 142
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by glolar View Post
gnpower,

My buggy was pushing, and I removed some droop from the rear. Fixed the problem. Let us know what you find out.
When you got rid of some droop in the rear, did your car tend to start flipping over a bit more. Figured the higher center of gravity would be trouble
gnpower is offline   Reply With Quote
Old 09-12-2009, 06:12 PM   #9
Tech Adept
 
Join Date: Mar 2007
Posts: 142
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by bigde2001 View Post
For push you can loosen the front springs and tight the rear spring a little therefore when comeing off gas going into corner weight shift forward. You can also lighten rear diff fluid. Hope this helps.
I will make the changes and see how it works tomorrow. I post with any performance changes. Thanks to all.
gnpower is offline   Reply With Quote
Old 09-12-2009, 07:03 PM   #10
Tech Elite
 
PTP Racing's Avatar
 
Join Date: May 2003
Posts: 2,699
Trader Rating: 2 (100%+)
Default

Yes moving the front upper hinge pins up should help gains some mid to exit steering.

Is your car an original RC8? Have you moved the battery up if it isnt? Having some extra weight on the front of the car can really help.

Also you can try raising the rear ride height or removing some front droop. Dont underestimate those 2 adjustments.
__________________
Paycheck to Paycheck Racing
Jason Miller
PTP Racing is offline   Reply With Quote
Old 09-13-2009, 02:31 AM   #11
Tech Addict
 
razo125's Avatar
 
Join Date: Jan 2004
Location: FearFarm - Arizona
Posts: 663
Default

Quote:
Originally Posted by razo125 View Post
as far as hinge pin bushing position are you talking about the rear hub position? Moving the rear hub backwards will give more side bite in the rear. Moving them forward will give more forward bite and it might help the car come around better if your pushing.

Where are you pushing? high speed corner entry or exit?
Quote:
Originally Posted by gnpower View Post
Mid to exit.
So its pushing only on mid/exit high speed corners. Theres lots of things you can try, but they all affect other things. The easiest is moving weight forward as everyone is saying.

On exit you are accelerating so if you put less droop on the front, there will be less weight transfer to the rear when you accelerate giving you more steering.

In the middle of the corner if you're just rolling through, just lower your ride height in the front or raise the rear to put more weight in the front

Try these first.
razo125 is offline   Reply With Quote
Old 09-13-2009, 06:26 PM   #12
Tech Regular
 
FactoryRacing23's Avatar
 
Join Date: Jun 2009
Posts: 254
Trader Rating: 2 (75%+)
Default

Quote:
Originally Posted by PTP Racing View Post
Also you can try raising the rear ride height or removing some front droop. Dont underestimate those 2 adjustments.
Just trying to understand this, But removing some droop from the front end would let the front end lift more and shift more weight to the rear correct? wouldn't this take away from the steering? Plz explain.. I'm pretty new to setups and would like to understand that.

Thanks, Nick
__________________
Nick Groves
FactoryRacing23 is offline   Reply With Quote
Old 09-13-2009, 06:27 PM   #13
Tech Elite
 
smokinu's Avatar
 
Join Date: Apr 2008
Location: MODESTO CA
Posts: 4,863
Trader Rating: 60 (98%+)
Default

let off the throttle and roll it thought the corner i mean
like every car is going to push to some point
__________________
Marcus P.
\\Speedzone USA//Savox USA\\Caster Racing Parts//
www.speedzoneusa.com. www.casterracingparts.com
smokinu is offline   Reply With Quote
Old 09-13-2009, 06:34 PM   #14
Tech Master
 
jrwoodchuck's Avatar
 
Join Date: Nov 2007
Location: Northampton, Massachusettes
Posts: 1,336
Default

try going up in front shock oil, thicker oil slows the weight trasfer to the rear and can help. you would be suprised what going up 2 1/2 on front oil will do.
__________________
Doug
TLR 22/M-11

“Looks like I picked the wrong week to quit sniffing glue.”
jrwoodchuck is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Anyone setup their car's brakes to be FRONT bias??? ganymede Nitro Off-Road 37 09-02-2009 01:55 AM
xxxt pushing in corners? RChead1 Electric Off-Road 23 05-29-2009 03:44 PM
Losi 8ight front hinge pin retainer trouble LVBaja Nitro Off-Road 25 08-12-2008 11:30 AM
xxx-t pushing??? ghj1997 Electric Off-Road 29 07-14-2008 01:43 PM
Foam tire wear...front to rear Jeel Electric On-Road 8 10-08-2005 11:36 AM
? on overdriving front wheels on a 4WD Test Driver Nitro On-Road 24 09-21-2002 11:52 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 05:45 PM.


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