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Old 01-06-2006, 07:58 PM   #13666
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Rebuild the diff with either:

the updated diff screw and nut that is standard on the Hara edition

or

us the TC3 diff screw and t-Nut

We run 3 PRO4's and we use the AE TC3 diff screws and t-nuts and this solved all our diff loosening issues. Just substitute the AE screw and nut and use the stock balls and washers.
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Old 01-06-2006, 08:27 PM   #13667
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Thanks Southern Fried
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Old 01-06-2006, 08:42 PM   #13668
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Anytime
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Old 01-06-2006, 09:42 PM   #13669
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I was at the local indoor track today and got some great coaching from one of the experienced racers. This was a big help since I'm just a newbie (only been racing for about 4 months and only participated in about 6 races).

The expert runs a Corally RDX. He suggested that once I get my driving skills perfected, I should switch to an RDX to get better lap times. I am currently running an asphalt setup on my Hara Edition, so it is not optimal for the carpet, but I'm curious about whether the Pro4 can perform as well as the latest and greatest belt drivers.

My impression from various reviews is that it can, but I'd like other views (even if this audience might be a bit biased).

I should add that so far I am finding the Pro4 a wonderful car. It is fairly easy to control, seems very consistent and predictable, is not too hard to work on, and (other than front dog bones) quite sturdy.

I think I have the front dog bone issue fixed as well by using the new thicker TC4 alu dog bones. I am a bit disappointed that I may need to invest the time and money in new upper and lower chassis plates to do well on carpet.

Thanks,
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Old 01-06-2006, 11:38 PM   #13670
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Keep the Pro4, there is nothing wrong with it. The car being predictable is the best thing for someone new to the hobby. You will become a better driver overtime with a predictable car, even if it is a bit slower. Once you get better then start experimenting with setups.

A bit of advice:

If you get another car, if possible hang onto your Pro4. That way if you have any issues with your new car you still have a car that works properly until you get your new car sorted out.
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Old 01-06-2006, 11:40 PM   #13671
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Im new to RC so don't flame me for saying so.

It looks just like the TC4...same exact layout.
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Old 01-07-2006, 12:38 AM   #13672
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Quote:
Im new to RC so don't flame me for saying so.

It looks just like the TC4...same exact layout.
Yes, the same way a RDX looks like a Schumacher Mi2 and a TRF-415 looks like a Xray FK'05. Similar design in general, but it's all about subtlety. The TC4 shares a lot of the same design as the Xray in the way the top deck attaches. It means nothing really. It all depends on if the car works for you.

For some reason TC4's are not fast at my track. TC3's were, so it would make sense the TC4 would be .. right? Well, for some reason they aren't. Pro4's are the fast shaft car, RDX's are the current fast belt car.


Ira .. I wouldn't just jump to a new car, especially if you're newer to the hobby. Take your time with the existing car, and at least out grow it before you move onto something else. You'll learn more that way, instead of jumping to another car with a whole new learning curve. When/if the Pro4 starts holding you back lap time wise, that's the time to think about switching cars. If your still learning how to setup a car, or can't keep it off the pipes, now is not the time to bounce from car to car .. it may just frustrate you.
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Old 01-07-2006, 02:08 AM   #13673
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Default pro 4

hi i was wondering if anyone had some spare parts they wanted to sell for a pro 4 cause i have one and i have no spares for it im just looking for the main things or if someone has lots of stuff that want to sell in bulk. i live in australia and im willing to pay postage. if can help pm me or email is fine

my email is snap_u2000@hotmail.com or pm me

thanks matt
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Old 01-07-2006, 04:12 AM   #13674
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snap_u2000...

HPI parts are hard to get in Australia. Their previous importer/distributer didn't handle things very well and shops didn't like not being able to get anything in for their customers.

I've been told that things have changed..

Lucky for you.. MRC model parts in canberra are HPi specialists. Good prices and a bunch of nice ppl to deal with. http://www.mrcmodelcarparts.com.au/

Give them a try...
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Old 01-07-2006, 05:40 AM   #13675
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iblumberg,

I would hang in there with the pro4 also. I had one when they first came out. Had real good success with the car, then got a Xray fk04, and then a JRXS. I just picked up a pro4 hara ver. and am very happy with it. It has been the best car for me so far. I think for stock and 19T the pro4 still can stay up with the best of the cars today. Easy to tune, work on and parts are dirt cheep.
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Old 01-09-2006, 09:00 PM   #13676
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What is the top deck mod? How do you do it? And can you post a pic. Thanks
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Old 01-11-2006, 02:08 PM   #13677
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Anybody interested in buying a Pro4 which is in great condition and has many hopups?? Check http://www.rctech.net/forum/showthre...77#post2060277
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Old 01-12-2006, 02:31 AM   #13678
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Just now getting my Pro 4 drivable. Had to find a setup for a small carpet track. If feels really good but im still about 2 sec. off the pace. I have a push problem. I had AE copper spring in the rear and will go to AE purple in rear to help. I hope that will free the car up to make up the 2 sec.
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Old 01-12-2006, 04:48 AM   #13679
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Quote:
Originally Posted by kyracer
AE purple in rear
That just does not sound right. What type of tires are you using? Post your setup.

Snowy.
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Old 01-12-2006, 09:07 AM   #13680
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Quote:
That just does not sound right. What type of tires are you using? Post your setup.
I agree. Plus what rear block are you using? Going to 1.5 degrees of toe will free up the rear end and make it rotate more. Tends to make the car less stable, but reduces push.
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