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Old 07-09-2005, 11:38 AM   #12091
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I raced a Pro2 at the HPI Challenge, and I ran stock. But it was last year, and I had never driven a shaft drive car then, so I won't be able to tell you much. But I do notice that my Pro4 is definately slower than my Pro2. In terms of acceleration, I can't help you there.
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Old 07-09-2005, 11:52 AM   #12092
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Doe's anyone know where to get ti racing cvd bones or the japanese version bones I keep ripping the pins through the mip cvd's. Put in new ones two weeks ago ripped one out last night this is getting expensive.

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Old 07-09-2005, 12:25 PM   #12093
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If a Pro2 is quicker than your Pro4..You have some problems with your Pro4.. On the Belt vrs. Shaft question,For me a shaft drive car is just quicker out of the corners,I like a shaft driven car in stock but I dont(or in this case cant.. ) drive a shaft drive car in mod.For me a belt car puts the power down alot smoother,It's alot easier on your car(as in You DONT break gears.. )The cars I'm comparing are Pro4,Alex R3,TC4,Evo4,XrayFK04,Shuie Mi2,415,Tech MY02R.I "test"(i think it's called play.. )at least 4 days a week..
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Old 07-09-2005, 12:42 PM   #12094
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Quote:
Originally Posted by xxxkat
If a Pro2 is quicker than your Pro4..You have some problems with your Pro4..
Maybe it just seemed slower. I drove the Pro2 out in my street, and it would go right by my feet. But I ran the Pro4 out in a parkinglot, further away from me. Maybe it was just an optical illusion? I did have to rearrange a battery pack. Maybe I f'ed it up? I've got some Fusions coming in a few weeks. Maybe that will make a difference.
-Josh

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Old 07-09-2005, 01:54 PM   #12095
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It could be a different gearing between your Pro 2 and Pro 4, this would make a big difference to the top speed and acceleration so I'd check to see if you were using the same final drive ratio in both cars.
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Old 07-09-2005, 03:34 PM   #12096
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Well, I just went to www.gearchart.com, and here's what I found:
The Pro2 has an internal drive ratio of 2.1, while the Pro4's is 2.4375. With a 116 tooth spur and a 35 tooth pinion, the final ratio is 6.96. With the stock spur of the Pro4 and the same pinion gear, the final drive is 6.82. So apparently, my Pro4 should be slightly faster. Maybe I just hosed up my battery?
-Josh
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Old 07-10-2005, 01:55 AM   #12097
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Default Any people here have expirence driving a Pro 4 &

a TC4? I'm putting together my Pro 4 and I was wondering if the cars are alike in setup? What does one do over the other in driving characteristics.
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Old 07-10-2005, 02:15 AM   #12098
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Can anyone help me with where is the best and cheapest hobby shop online to buy the pro4 2005 edition... Thanks
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Old 07-11-2005, 07:09 AM   #12099
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Rosen- Black grease is your CVD's friend. Let them meet every few weeks and your CVD's won't let you down.
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Old 07-11-2005, 02:13 PM   #12100
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HPI? I want to get the new updated Knuckles, c-hubs and motor mount.
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Old 07-11-2005, 04:52 PM   #12101
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I need some advice on how to keep the batteries in place in my Pro 4. Just build one and ran in the race this last weekend. The battery was knocked out twice due to being hit on the side. I am using the battery holder and have screwed down the post down to the maximum but the battery still falls out. What are you advice on dealing with this problem? Thanks!
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Old 07-11-2005, 05:44 PM   #12102
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Quote:
Originally Posted by RCknight
a TC4? I'm putting together my Pro 4 and I was wondering if the cars are alike in setup? What does one do over the other in driving characteristics.
The main characteristic difference.. is the PRO 4 actually works and the TC4 doesn’t.
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Old 07-11-2005, 05:45 PM   #12103
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Quote:
Originally Posted by Yellowtaro
I need some advice on how to keep the batteries in place in my Pro 4. Just build one and ran in the race this last weekend. The battery was knocked out twice due to being hit on the side. I am using the battery holder and have screwed down the post down to the maximum but the battery still falls out. What are you advice on dealing with this problem? Thanks!
did you put the hpi foam strips under the batter brace?
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Old 07-11-2005, 05:46 PM   #12104
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You need to bevel the battery slots on the chassis.I have been running a PRO4 since they were released and this is the surest solution I have found....besides strapping them in with tape!
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Old 07-11-2005, 06:39 PM   #12105
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Yeah, the only thing really keeping them down while using the battery brace is the foam strip that runs on the underside. You should never have problems while that is in- it locks those bad boys down!
-Josh
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