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Thread: Mugen MRX-4
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Old 08-25-2006, 11:06 AM
  #1502  
AKSHUN
Tech Adept
 
Join Date: May 2006
Location: Cambridge,Ontario,Canada
Posts: 213
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Originally Posted by Corse-R
Today I've been at my local track and faced a very strange thing with my 4-R, here's the scenario:

- Mugen Dome body (Kyosho one), gurney flap at 3mm over the body.
- 1degree toe-out front.
- 2.5 degrees camber at Front and 3 at rear.
- White spring with #600 oil (F/R).
- 2 degree toe-in at rear.
- Long rear upper a-arm
- Shocks at their stock positions
- 1mm shim at the rear uprights.
- Front roll bar at around 40º
- Rear roll stock with 3mm of hang over the balls (stock setup).
- A ackerman.
- 35 shore all around.

Car has a massive understeer coming out the turns and feels too nervous on entering the turns.

Solved it partially giving it more caster (in fact I have only the 1mm shim at rear of the a-arm) but spanks the front tyres giving me a pretty inner lip the outer side is almost brand new.

Could not test this morning but wanting tomorrow to test:
- B Ackerman.
- Giving less camber at the fronts
- Go to med rear a-arm.
- Red springs at rear



Suggestions please? Track is big and flowing, gear ratio is 17/49 and 21/45. Only two hairpins the rest are flowing turns.
Try the B ackerman, and the short rear upper arms,as well as two shims in the rear uprights.
are you using the 4.5mm roll center block or the 5.5mm??
try the 4.5mm one.
it seems you have way too much camber in the front, use only 0.5 -1.00.
good luck!!
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