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Old 10-10-2004, 09:00 PM   #7981
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Quote:
Originally posted by DOMOisCOOL
I just finished the diff mod last night. Is it just me or I had to tighten the screw a lot to get it at least a bit tight?
you have to dremel off a little extra material of one of the outdrives to make the t nut sit in deeper. I was working on it at Allspeed after the race.

Andrew.. you seriously gotta fix that positive camber you have there! :
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Old 10-10-2004, 09:04 PM   #7982
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After two races with the Pro4, i found 2 weak points of the car (every car has at least 1 weak point):

- diff screws are weak and loosen even with new diff nuts (fixed with TC3 diff mod)
- front dogbones bend easily (fixed with beefier TC3 dogbones such as Shiny or Steel ones)

Other than that, car is great. Just as fast as any comparable shaft car (SD, TC3, Evo3/4). Just a matter of which one suits your driving style and what company you prefer.
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Old 10-10-2004, 09:07 PM   #7983
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Yeah I do

I did Dremel off about 2-3mm off one of the outdrive halves.

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Old 10-10-2004, 09:11 PM   #7984
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Quote:
Originally posted by Aurra Sing

After two races with the Pro4, i found 2 weak points of the car (every car has at least 1 weak point):

- diff screws are weak and loosen even with new diff nuts (fixed with TC3 diff mod)
- front dogbones bend easily (fixed with beefier TC3 dogbones such as Shiny or Steel ones)

Other than that, car is great. Just as fast as any comparable shaft car (SD, TC3, Evo3/4). Just a matter of which one suits your driving style and what company you prefer.
I had the same problems as well, even switched to Tobee Craft ones.

However, I also noticed that most cars have the same problem of the front CVD bones bending (I even saw Terry's Xray have bent CVD bones today. )

Instead of buying some beefier CVD bones, why not go to steel ones? They're stronger IMO. They snap instead of bending, and I've been using them with good results.
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Old 10-10-2004, 10:20 PM   #7985
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HPI's bones bend because it's aluminum, tobee craft's replacement is aluminum and TC3's FT ones are aluminum...

The shiny (or steel) can still bend if alot of force is applied.
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Old 10-10-2004, 11:12 PM   #7986
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Have you guys played around with the front C-Hubs at all running different caster? I was thinking about going to the 6 degree hubs to increase roll speed and steering from the center out and just wondering what you guys have found when making this change.
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Old 10-10-2004, 11:38 PM   #7987
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there are a couple of black plastic rings or spacers that come with the associated parts, I fitted one of those to fill the hole the t nut goes in a bit but it still pulled down past the grooves. two of the spacers ends out being to thick and the t nut doesnt sit in far enough.

i dont own a dremel (yet)

When i tightened the t nut down it still ended out pulling down into the outdrive so the lugs dont stick out the slots in the outdrive but it has never come loose on me yet

Quote:
Originally posted by Aurra Sing
you have to dremel off a little extra material of one of the outdrives to make the t nut sit in deeper. I was working on it at Allspeed after the race.

Andrew.. you seriously gotta fix that positive camber you have there! :
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Old 10-11-2004, 03:28 AM   #7988
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Has any one used a spool on the front of their pro4?

How did you find it?

Im considering trying one as I like the way the car behaves with the one way, like lot of off power steering etc but I need to be able to use the brakes as I mostly race on a very tight indoor carpet track.

Is the spool the way to go?
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Old 10-11-2004, 07:03 AM   #7989
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Default Re: Re: Acceleration Question

Quote:
Originally posted by tones
StewartFan20- just check your diffs aren't slipping first.

The diff does not seem to slip. I probably run it a little looser than I should, but it does not seem to slip.

Actaully the car has decent acceration, I just think it could be better and was wondering if anyone has some tips to try
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Old 10-11-2004, 08:41 AM   #7990
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Just got back from the race. I didn't do so hot, which was my fault. That's because the car kept getting better. We moved the camber links to the outer holes on the diff cases, which freed the car and smoothed it out also. Moving the shock on the front to the 3rd hole in from the outside also helped. At the rear we changed the toe to 1.5* and shorted the wheelbase 1mm to compensate for the change from the toe in (lengthwise). Kevin won the B. I pretty much crapped out. My car was really good, and I had a chance to do a 20 lap run, but I stepped on it. Euge (Eugene Sia) actually kicked ass for his first big race! Drove great all weekend.

The traction was high, but consistent. It didn't go crazy, or do wierd things like go up and down a lot. The track was very tight and technical as well.

There weren't a lot of changes to what KevinK had on his previous setup, so that actualy is really cool. The scary part is that there may even be a bit more in there.
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Old 10-11-2004, 08:50 AM   #7991
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Default Re: SPOOL

Quote:
Originally posted by Rich_p
Has any one used a spool on the front of their pro4?

How did you find it?

Im considering trying one as I like the way the car behaves with the one way, like lot of off power steering etc but I need to be able to use the brakes as I mostly race on a very tight indoor carpet track.

Is the spool the way to go?
Im un decided at the mo. At my local track I found I had too much mid - exit corner steering with it, but I need more time to make set up changes. IMO its ALOT easier to drive than a one way.
You have to alter your driving style with it, they have less iniatial steering but then a ton of mid-corner and exit steering, so you have to be carefull.
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Old 10-11-2004, 09:55 AM   #7992
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I've made one, and I'm still looking for a better way to make them, but with my testing, a spool pushes more than a one-way entering the turn, and is the same under acceleration as a one-way. So to run a spool, you need to use brakes, and swing the back end around through the turn.
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Old 10-11-2004, 10:02 AM   #7993
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Thanks for the update Rob. Sorry to hear that you had a rough time. Sounds like a few more races and you guys will have the carpet Pro4 dialed!

What springs were you running Rob?

Way to go Euge and Kevin!!! Good work.
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Old 10-11-2004, 10:13 AM   #7994
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The pink and green springs from HPI, which are around 30 and 25lbs.

A heavier rear spring was tried (blue-28lbs), but it didn't work as well.
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Old 10-11-2004, 11:03 AM   #7995
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Looks like I better order some regular HPI springs as I have been using Assocated and Losi springs. Did you guys try any softer than 25lbs in the rear?
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