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Old 03-15-2005, 08:08 AM   #4906
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most be nice to have a track near by... Our old track is being destroyed as we speak to build a soccer field... Now the neares track is about 2 and 1/2 hrs from my house, so we usually practice and bash in a parking lot, but races resume on april, so I guess I'm going to have to drive all the way there to win somo races lol hopefully...
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Old 03-15-2005, 09:59 AM   #4907
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Default Front Spool - Locked DIff

AMG_Racer -

I am considering going back to the stock differential becuase of the off-power steering loss from going to the spool in the front.

What are you doing to get the off-power steering back?
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Old 03-15-2005, 11:03 AM   #4908
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To increase off power steering as you are entering a turn go to a softer front tire or softer front roll bar. Harder rear tires and sifftening the rear roll bar will do the same thing. You can also decrease the rear toe in.
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Old 03-15-2005, 12:22 PM   #4909
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great, I will try that this weekeend and see what happens
also with the solid axle... would i get my steer back if I use a biffier servo?
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Old 03-15-2005, 12:47 PM   #4910
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Quote:
Originally posted by Rapid Roy
To increase off power steering as you are entering a turn go to a softer front tire or softer front roll bar. Harder rear tires and sifftening the rear roll bar will do the same thing. You can also decrease the rear toe in.

Thanks RR -

I'll try front vs rear toe changes as I already have softest tire compunds on front and the front swaybar is already horizontal.

Also thinking of using 30k rear diff oil. I currently do not use any oil in the rear. I assume that adding rear diff oil will take away rear "steering" which in effect "adds" front steering.

Last edited by JAG Racing; 03-15-2005 at 12:59 PM.
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Old 03-15-2005, 01:33 PM   #4911
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JAG you are correct. Here is what I use for reference.
Attached Files
File Type: zip 710quick_reference.zip (145.5 KB, 48 views)
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Old 03-15-2005, 01:52 PM   #4912
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Default Re: Front Spool - Locked DIff

Quote:
Originally posted by JAG Racing
AMG_Racer -

I am considering going back to the stock differential becuase of the off-power steering loss from going to the spool in the front.

What are you doing to get the off-power steering back?
Yep you dont get something for nothing unfortunately. The braking and on power steering is really good with the solid but you definately lose off power steering. If I recall rightly you use rubber tires on concrete? Here is what I noticed:

1. The rear diff is critical. Too stiff and it affects off power. I use 0-10K max in the rear on rubber.
2. I use the silver fronts and black rear springs. I use the front swaybar at around 30 degrees. You can use the front swaybar to balance the car.
3. Add around 1 degree toe out.

There are a few more things but these are the main things.
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Old 03-15-2005, 01:55 PM   #4913
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Quote:
Originally posted by JAG Racing
Thanks RR -

I'll try front vs rear toe changes as I already have softest tire compunds on front and the front swaybar is already horizontal.

Also thinking of using 30k rear diff oil. I currently do not use any oil in the rear. I assume that adding rear diff oil will take away rear "steering" which in effect "adds" front steering.
OK I missed this post If you have no diff oil you are getting more grip in the rear off power, possibly too much making the car not want to "rotate". You may need to go to 10-30K rear oil to make the car rotate enough. In my experience this car is quite sensitive to the rear diff oils, I use a different rear diff for each track I go to.
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Old 03-15-2005, 02:30 PM   #4914
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Thanks Guys - I'll run some trials and let you know how it goes.

I wonder if it makes sense to have a spare diff in the tool box that is already set-up with different oil? Just a thought.


AMG - Yes I usually run on concrete but will be running high-grip asphault this weekend. I'll also try toe out.

Rapid Roy - Handy sheet. So for my situation ( Understeer on "corner entry" I see a level 2 adj for Roll Center. Do I RAISE the upper link arm in this case?

Thanks again for the help.

Last edited by JAG Racing; 03-15-2005 at 02:36 PM.
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Old 03-15-2005, 02:37 PM   #4915
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I use light grease in the rear, should I use 10k oil to make it more stable? I also seenin video footage that at the end of the straights sometimes the car gets lose, is this because of too much toe in in the rear... I use around 2.5 rear toe in.
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Old 03-15-2005, 02:56 PM   #4916
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Quote:
Originally posted by JAG Racing
Thanks Guys - I'll run some trials and let you know how it goes.

I wonder if it makes sense to have a spare diff in the tool box that is already set-up with different oil? Just a thought.


AMG - Yes I usually run on concrete but will be running high-grip asphault this weekend. I'll also try toe out.
I have 4 diffs made up and ready to go with different configurations. It is a very useful tuning aide, especially since the R40 diff is so easy to change.

On high grip asphalt the best bet is almost always a front oneway unless you need to brake hard. The Hara 2004 ROAR setup with some mods works awesome on asphalt.
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Old 03-15-2005, 07:25 PM   #4917
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Default use foams

foam set up with biased right turning track
front: 37 shore cut: 58mm
rear: 37 shore cut: 59mm

front camber: LEft: 2.5 Right: 2.0
rear camber: left: 3.5 right: 3.0

front blade sway bar: 90 deg.
rear sway bar: none

front toe out: 1 deg
rear toe in: 2 deg

ride height: front: 4.5 rear: 5.0

TRACK: SPEEDZONE HPI R40 2004 Ed.
POSITION: 3rd A-main
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Old 03-16-2005, 08:24 AM   #4918
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Well my parts are here and now I can put together my car again, since the asccident I hd to take it all apart, I mean set up the camber, toe-in, and the steering arms because when I hit the wall everthing got messed up. Now I can finall put it back together and get ready to try the solid front axle with new 35shore all around tires, no swaybar in the rear and lowered to 3.5mm front and 4mm rear
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Old 03-16-2005, 01:21 PM   #4919
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Unfortunately I probably won't be able to test it today. I really wanted to. I'll just rev it to see how the clutch engages and see if the 2speed engages a bit later.
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Old 03-16-2005, 02:12 PM   #4920
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Tested the car and she fired right up. The centax and 2speed adjustment were a success! More acceleration offline and more top end. Gonna try to run the car outside tomorrow. I can't wait!
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