Hpi Pro 4
#3226
Tech Elite
Happy BirthDay TROY! May you have many more Birthdays and a good R/c year
#3227
Originally posted by True R/C Racing
Happy BirthDay TROY! May you have many more Birthdays and a good R/c year
Happy BirthDay TROY! May you have many more Birthdays and a good R/c year
It's definately been one of the harder birthday's... Gary isnt the only one causing me trouble today.
I had two tests and a lab today. Major ouch..
#3228
Tech Elite
Building the HPI Pro-4
Guys;
OK, I am at the Upper Deck installation phase and cannot stop the chassis from tweaking. I've tried all kinds of tightening sequences and as soon as I get a few turns on the screws, the Chassis is noticably tweaked.
Looking at the alignment of the holes in the Upper Deck to the mating holes in the lower Chassis assembly. You can see severe misalignment. No matter how I install the Deck Screws and tighten them, the Car starts tweaking.
I have never had this kind of problem before with any other double decked Car that I've owned.
Short of using a Sledge Hammer to fix the problem, anyone have some Ideas?
Thanks,
OK, I am at the Upper Deck installation phase and cannot stop the chassis from tweaking. I've tried all kinds of tightening sequences and as soon as I get a few turns on the screws, the Chassis is noticably tweaked.
Looking at the alignment of the holes in the Upper Deck to the mating holes in the lower Chassis assembly. You can see severe misalignment. No matter how I install the Deck Screws and tighten them, the Car starts tweaking.
I have never had this kind of problem before with any other double decked Car that I've owned.
Short of using a Sledge Hammer to fix the problem, anyone have some Ideas?
Thanks,
#3229
Tech Elite
Re: Re: Building a Pro-4
Originally posted by RCBuddha
Pops,
Don't forget, Tamiya's Clamping hexes work fine, and I've been using them for the last few races with no problems....SoCal had some blue ones if last I checked if you were interested.
Pops,
Don't forget, Tamiya's Clamping hexes work fine, and I've been using them for the last few races with no problems....SoCal had some blue ones if last I checked if you were interested.
The Graphite Hexes worked out fine, just had to add an extra shim on the axles to take up the play.
Thanks,
#3230
Tech Champion
iTrader: (32)
Join Date: Aug 2001
Location: In a land of mini-mighty mental giants
Posts: 8,854
Trader Rating: 32 (100%+)
Pops....where is it not lining up on the trans cases or the steering posts? If its the trans cases make sure that the case is fully closed and seated also that the two screws holding them together are not overly tightened leading to them pulling the holes out of alignment with the top deck. If its the steering post make sure that nothing is bent or that the they sit perfectly straight. Other then that maybe your top deck is off a little.
#3231
i have seen many pictures of cars with the upper deck turned over and using counter sunk washers and screws.
this supposedly eliminates some of the tweak.
worth a try i guess.
this supposedly eliminates some of the tweak.
worth a try i guess.
#3232
Re: Re: Re: TAMIYA ONE-WAY CF DIFF PLATE
Originally posted by RCBuddha
TeamPrP, I'd say to go ahead and start making the parts. Just be sure to send one my way for additional testing...
TeamPrP, I'd say to go ahead and start making the parts. Just be sure to send one my way for additional testing...
#3234
Tech Elite
Upper Deck Tweaking
Guys;
I purposely bought the countersunk washers along with this Car just because I had read that there may be a problem .
I have tried it both ways and neither seems to make any difference. Seems like no matter what pair of screws I start with, as I tighten them down past 1/2 in, the Chassis starts lifting somewhere. If I try a cross pattern, it's even worse.
I am thinking that maybe the Upper Deck is defective. Both gearboxes fit together very nicely. I don't see where else the problem could be and the Chassis lays nice and flat without any screws in the Deck.
Even my flexable Pro-3 was very easy to keep straight when I installed an Upper Deck on it.
I purposely bought the countersunk washers along with this Car just because I had read that there may be a problem .
I have tried it both ways and neither seems to make any difference. Seems like no matter what pair of screws I start with, as I tighten them down past 1/2 in, the Chassis starts lifting somewhere. If I try a cross pattern, it's even worse.
I am thinking that maybe the Upper Deck is defective. Both gearboxes fit together very nicely. I don't see where else the problem could be and the Chassis lays nice and flat without any screws in the Deck.
Even my flexable Pro-3 was very easy to keep straight when I installed an Upper Deck on it.
#3235
Tech Elite
pops how about shimming it somewhere?
#3236
Tech Champion
iTrader: (32)
Join Date: Aug 2001
Location: In a land of mini-mighty mental giants
Posts: 8,854
Trader Rating: 32 (100%+)
Originally posted by Super Steve
Hey PRP
When are you guys gonna start making those chassis?
Hey PRP
When are you guys gonna start making those chassis?
Yeah.....
Pops....I dont know then something is not right thats forsure. See if your LHS has another top plate instock and try it out and see if that fixes the problem. If it does send the defect one back to HPI.
#3237
super steve, thanks for asking. I had a little delay but will be getting the chassis kit prototypes back from machining by Wednesday hopefully sooner. Then it's off for fast and furious track testing on carpet with foams- MOD!!!
Sorry, I can't sell the prototype backing plates, unless you want to spend $65 on it
Sorry, I can't sell the prototype backing plates, unless you want to spend $65 on it
#3240
R/C Tech Elite Member
iTrader: (40)
Re: Upper Deck Tweaking
Originally posted by popsracer
Guys;
I purposely bought the countersunk washers along with this Car just because I had read that there may be a problem .
I have tried it both ways and neither seems to make any difference. Seems like no matter what pair of screws I start with, as I tighten them down past 1/2 in, the Chassis starts lifting somewhere. If I try a cross pattern, it's even worse.
I am thinking that maybe the Upper Deck is defective. Both gearboxes fit together very nicely. I don't see where else the problem could be and the Chassis lays nice and flat without any screws in the Deck.
Guys;
I purposely bought the countersunk washers along with this Car just because I had read that there may be a problem .
I have tried it both ways and neither seems to make any difference. Seems like no matter what pair of screws I start with, as I tighten them down past 1/2 in, the Chassis starts lifting somewhere. If I try a cross pattern, it's even worse.
I am thinking that maybe the Upper Deck is defective. Both gearboxes fit together very nicely. I don't see where else the problem could be and the Chassis lays nice and flat without any screws in the Deck.
After tightening the screws down all the way, does the chassis sit flat on your setup board? Or is it tweaked? I've noticed that my chassis moves a little like your describing, but it always ends up flat on my setup board, once i'm done tightening.