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Old 06-10-2005, 11:28 AM   #7276
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The pro 4 2005 kit is already at rcmart.
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Old 06-10-2005, 12:09 PM   #7277
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Default Set up Help

Hi all,

I am trying to find the best race setup for my 2004 r40 and would like to hear some of your opinions. The track I run is tight and technical, and has average to high grip (they are putting sugar on the track as I write to increase grip for tommorow!). I am having problems with slow weight transfer in general (the car isn't nervous enough) and especially on turns 4 and 5 in the attached pic. My current set up (for average grip) is also lacking rear grip so I can't get on the throttle early enough to put up serious lap times. I am running:

fr: 37 shore, 50,000 diff, red serpent springs fully inclined, 50000 oil all round , 2 deg camber, 1 deg toe out, as for castor I have 3mm spacing in fr of hingepins

rr: 37 shore, 10000 diff, stock black springs fully inclined, 2.5 camber, 1.5 deg toe in

Any ideas to make this car a winner tommorow?
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HPI R40 Nitro Car Forum-p1010004.jpg   HPI R40 Nitro Car Forum-vibreur_actuels.gif  
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Old 06-10-2005, 12:28 PM   #7278
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Quote:
Originally Posted by Benzoil
Hi all,

I am trying to find the best race setup for my 2004 r40 and would like to hear some of your opinions. The track I run is tight and technical, and has average to high grip (they are putting sugar on the track as I write to increase grip for tommorow!). I am having problems with slow weight transfer in general (the car isn't nervous enough) and especially on turns 4 and 5 in the attached pic. My current set up (for average grip) is also lacking rear grip so I can't get on the throttle early enough to put up serious lap times. I am running:

fr: 37 shore, 50,000 diff, red serpent springs fully inclined, 50000 oil all round , 2 deg camber, 1 deg toe out, as for castor I have 3mm spacing in fr of hingepins

rr: 37 shore, 10000 diff, stock black springs fully inclined, 2.5 camber, 1.5 deg toe in

Any ideas to make this car a winner tommorow?
What tires are you using? I personally don't run that much camber on my cars. Infact it's in stock position or most of the time neutral. For caster I recall only having 2 or 3mm spacer behind the upper arm on the hingepin, stock diff fluid front, and a dab of the same fluid in the rear. I run NEO Medium red springs all around. Also, using 1 degree toe in for the rear. The car handles really well and refuses to spin out no matter what I do.
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Old 06-10-2005, 12:29 PM   #7279
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BTW, SICK track. I wish mine was like that. Floyd is still great though.
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Old 06-10-2005, 01:54 PM   #7280
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37 shore all round, I added some camber in the rear to get more lateral grip but the rear is still too sensitive. The track is fantastic and we have 4 or 5 variations which make the races varied and unpredictable!

BTW hows the rody on the r40? thats a heck of a mill you have there.

You seem to say that I should add more front caster, but wouldn't that give me less on power corner steering? I actually need more on power steering and traction...
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Old 06-10-2005, 02:00 PM   #7281
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Quote:
Originally Posted by KLANDERMAN
The pro 4 2005 kit is already at rcmart.
Yup and jethobby.com , but 2005 kit is also a diff kit than the HARA and the 2004 edition never made it to the us.
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Old 06-10-2005, 02:03 PM   #7282
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Quote:
Originally Posted by Benzoil
Hi all,

I am trying to find the best race setup for my 2004 r40 and would like to hear some of your opinions. The track I run is tight and technical, and has average to high grip (they are putting sugar on the track as I write to increase grip for tommorow!). I am having problems with slow weight transfer in general (the car isn't nervous enough) and especially on turns 4 and 5 in the attached pic. My current set up (for average grip) is also lacking rear grip so I can't get on the throttle early enough to put up serious lap times. I am running:

fr: 37 shore, 50,000 diff, red serpent springs fully inclined, 50000 oil all round , 2 deg camber, 1 deg toe out, as for castor I have 3mm spacing in fr of hingepins

rr: 37 shore, 10000 diff, stock black springs fully inclined, 2.5 camber, 1.5 deg toe in

Any ideas to make this car a winner tommorow?
Have you tried HARA's setup. Red proceed spring in the rear with black r40 spring in the front.

Ive tried it somewhat and enjoy it.

http://hpiracing.com/graphics/setup/...sr40_setup.jpg
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Old 06-10-2005, 03:58 PM   #7283
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I have a brand new still in package 3 Racing Front One-Way for the R40.... if anyone is interested please feel free to contact me with an offer.
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Old 06-10-2005, 09:59 PM   #7284
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Quote:
Originally Posted by Benzoil
37 shore all round, I added some camber in the rear to get more lateral grip but the rear is still too sensitive. The track is fantastic and we have 4 or 5 variations which make the races varied and unpredictable!

BTW hows the rody on the r40? thats a heck of a mill you have there.

You seem to say that I should add more front caster, but wouldn't that give me less on power corner steering? I actually need more on power steering and traction...
The Rody is reliable, powerful, and just flat out awesome! Still haven't removed the restrictor as yet. For castor I added more negative castor. For me now it corners better. I just do little experimenting now and then. Here is some info I found since right now I misplaced my R40 manual.

Caster
------
Caster is the angle to which the steering pivot axis is tilted forward or rearward from vertical, as viewed from the side. If the pivot axis is tilted backward (that is, the top pivot is positioned farther rearward than the bottom pivot), then the caster is positive; if it's vertical to the lower pivot point then the caster is zero.

Less Castor (vertical = 0 castor)
More OFF POWER steering into the corner
Less steering out of the corner
Less straight-line stability

More Caster (laid back more)
Less steering into the corner
More ON POWER steering out of the corner
More straight-line stability

Benefits of castor: (more positive castor/laid back more)

Maximizes tire contact patch during roll, braking, and acceleration
Improves turn-in response
Increase directional stability
Improved steering "feel" and self-center
Increases dynamic negative camber during turn in

Castor Vs Camber:

Camber doesn’t improve turn-in, positive caster does.
Camber is not good for tire wear.
Camber doesn’t improve directional stability.
Camber adversely effects braking and acceleration.
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Old 06-10-2005, 10:19 PM   #7285
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Default R40 Project

Well I managed to get my R40 to be 205mm quite easily with the GRP foams that have offsets and two 1mm spacers in each hub. I then came across this wolfpack part that lets you use those wide from tires of the 235mm car I believe on all ends on the sedan. This would be great for say running the OS .18TZ, which has massive power and needs all of it put to the ground. Using these though it has to be geared accordingly so I'm assuming I'll drop it down to a 20T pinion on first and 25T pinion on second. I wont be doing this any time soon, but it was just a thought.

http://wolfpackradicals.com/html/r40_.html
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Old 06-11-2005, 03:02 AM   #7286
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Quote:
Originally Posted by Benzoil
Hi all,

I am trying to find the best race setup for my 2004 r40 and would like to hear some of your opinions. The track I run is tight and technical, and has average to high grip (they are putting sugar on the track as I write to increase grip for tommorow!). I am having problems with slow weight transfer in general (the car isn't nervous enough) and especially on turns 4 and 5 in the attached pic. My current set up (for average grip) is also lacking rear grip so I can't get on the throttle early enough to put up serious lap times. I am running:

fr: 37 shore, 50,000 diff, red serpent springs fully inclined, 50000 oil all round , 2 deg camber, 1 deg toe out, as for castor I have 3mm spacing in fr of hingepins

rr: 37 shore, 10000 diff, stock black springs fully inclined, 2.5 camber, 1.5 deg toe in

Any ideas to make this car a winner tommorow?

You seem to have 2 seperate handeling problems. Not enough steering response or turn in and not enough rear traction when accelerating out of the turns.

For better steering response go to 0 degrees toe in or even 1 degree toe out. Next thing to do is to soften or remove the rear sway bar or stiffen the front sway bar. I am assuming that you are using the same shock oil and piston all around. You can also use softer springs in the rear. I use the silver myself.

Some of the above things will also help with the on power rear traction but the most probable cause is that your rear diff is too tight. Try taking all but a bit of the oil out of it and give it a try. You could also go to a heavier diff oil up front.

Do one adjustment at a time and see if it helps. There was also an excellent tuning guide posted in this thread a ways back. It was lifted from the Serpent site and is a chart that tells you what the change first then second and so on for any handeling problems.
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Old 06-11-2005, 11:48 AM   #7287
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I finnaly got my lola. Hark send me some pics of yours. I'm thinking on just a simple scheme like yours. It probally wont last long anyway .
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Old 06-11-2005, 02:44 PM   #7288
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Im getting my pit bag finally. Gosh its going to be so much easier now to goto my monthly races.

I got the OFNA bag. If you guys got any pictures of yours and how you have it setup. Feel free to post them. Ill post some of mine once its ready. Which reminds me I need to show you guys the new shots of my car. Its been evolving little by little.
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Old 06-11-2005, 02:47 PM   #7289
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Also just the other day I was checking hpis website and saw they had pictures of everyone at the hpi challenge.



Im in there somewhere.

Also does anyone find it odd that everyone there is almost the exact same height (look at our heads...almost kinda spooky). All we need are some storm trooper suites and you got yourself the perfect clone army!

-- BTW that is where I race....not too bad of a surface for a parkinglot. Then they use VHT on it.

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Old 06-11-2005, 04:40 PM   #7290
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lol.
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