Flamez
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| posted on 25/9/09 at 12:55 PM |
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Light Front End / Steering
The car is running sweet now I finally have a decent airbox and I've reset the Power Commander to "akroprovic" [it seems to work
well with the exhaust and cat].
However when accelerating hard and fast the front end seems so light. The geometry seems to be ok and is set up as the factory suggest. tyres are set
at 20psi. the car turns in well and self centres too. But I find the lightness a little disconcerting.
Is it me are all 7's light at the front when pressed on? I guess I have been spoilt by previous high range cars that stiffen the steering up
with speed and I just need to get more miles in and build the confidence up.
Would raising the rear end suspension help by putting a little more weight on the front?
How do other mac drivers find their steering..
PS I now check the QR every time. I think I'll have a sticker made up.
my build mac1motorsports
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02GF74
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| posted on 25/9/09 at 12:58 PM |
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Mac1motorsports WorxZX10R
should have gone CEC 
or eat more pies.
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MakeEverything
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| posted on 25/9/09 at 01:03 PM |
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quote:
Originally posted by 02GF74
Mac1motorsports WorxZX10R
should have gone CEC
or eat more pies.
Lol,
Sounds symbolic of a lightweight car with an underweight engine. As said, you only really get a good feel with more weight physically - ie a car
engine.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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BenB
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| posted on 25/9/09 at 01:04 PM |
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Try lowering the front ride height. Front end lift can be due to the front of the car riding higher than the rear so air gets rammed under the car and
lifts the nose, making the steering light....
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britishtrident
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| posted on 25/9/09 at 01:14 PM |
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Classic symptom of toe-out
Could be you are getting extra toe-out due to bumpsteer as the front end lifts. Dial in a bit more toe-in and try it.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Ben_Copeland
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| posted on 25/9/09 at 05:09 PM |
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You can lower the tyre pressures as well. Most run 14-16psi i believe.
I had similar problem till i had my tracking done. got about 1/2degree toe out and it felt fantastic after
Ben
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steve m
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| posted on 25/9/09 at 05:43 PM |
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!6 PSi in mine
when it was 28-32 it was like driving with the steering disconected !!
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Flamez
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| posted on 25/9/09 at 06:15 PM |
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Thanks guys I'll get the tracking sorted and try lower tyre pressures.
my build mac1motorsports
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David Jenkins
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| posted on 25/9/09 at 06:18 PM |
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They are light cars and very responsive, but should be stable at speed. As said above :
* Rear ride height greater than the front, by about 1" - 25mm (measure from chassis to floor - but not where the rear rises up!)
* Front wheels set parallel or slight toe-in.
* Tyre pressures not too high - mine are 18psi, most people run 20psi or below.
Easy things to play with, and should give a nicer feel.
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grusks2
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| posted on 25/9/09 at 07:21 PM |
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Phill
I run my front at 95mm at the front, measured at the chassis front, and 115mm at the rear measured at the rear of the chassis by the floor pan.
My steering is the same as yours 8 threads either side, measuring with a tape measure, 2 parallel lines down the side of the car, ive 4mm toe in
either side. Shocks are 8 clicks at the front
My tyres are at 17psi but filled with nitrogoen
My car goes a bit light at about 90+ in a straight line, but im happy with it.
http://mac1worxbuild.wordpress.com/
forgot my old password so another username doh
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grusks2
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| posted on 25/9/09 at 07:22 PM |
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what about some of those carbon mods front nose cone downforce winglet bits.....?
http://mac1worxbuild.wordpress.com/
forgot my old password so another username doh
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DarrenW
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| posted on 26/9/09 at 10:20 PM |
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Try slowing down. Your not on the way to a fire any more now Never had that problem in mine (although a pinto engine and driving like a granny might
have a part to play!!!).
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Flamez
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| posted on 29/9/09 at 11:40 AM |
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quote:
Originally posted by grusks2
Phill
I run my front at 95mm at the front, measured at the chassis front, and 115mm at the rear measured at the rear of the chassis by the floor pan.
My steering is the same as yours 8 threads either side, measuring with a tape measure, 2 parallel lines down the side of the car, ive 4mm toe in
either side. Shocks are 8 clicks at the front
My tyres are at 17psi but filled with nitrogoen
My car goes a bit light at about 90+ in a straight line, but im happy with it.
Thanks spence
I have lowered the front to 110 front and 140 rear. I'm not keen to go much lower for now as I need the clearance to get on and off the drive. I
have stiffened the dampers upto 8 clicks too. With tyres remaining at 20psi. It now feels a whole lot better at speed.
Pleas let me know if you ever get a soln. for the full cage without taking panels or the floor off.
my build mac1motorsports
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