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Old 06-27-2005, 12:10 AM   #11896
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just go to ur LHS with one of the screws and ask for a button head screw the size of the one from your pro4.
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Old 06-27-2005, 12:14 AM   #11897
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looking at the kit parts, the csk screws are:
Z087 FLAT HEAD SCREW M3x20mm (HEX SOCKET/10pcs)

also in the kit are:
Z356 BUTTON HEAD SCREW M3x18mm (HEX SOCKET/10pcs)

if you get another pack of them they should be perfect considering the upper deck is 2mm
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Old 06-27-2005, 12:19 AM   #11898
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perfect, thanks for all the help. Will this mod upset the stiffness of the upperdeck at all, or will I notice any difference in the driving style of the car?
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Old 06-27-2005, 12:32 AM   #11899
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Default HIGH TRACTION ARMS!

I'm alittle bit confused on this option for the PRO 4...is this used for tracks with lots of traction like carpet? or this arm is softer than stock and provide more traction that is needed for Low traction tracks? Thanks in advnace

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Old 06-27-2005, 12:42 AM   #11900
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Do you mean the plastic arms? If it that's what your talking about then i belive the plastic arms are better for low grip ashpalt tracks. Since the plastic is alot more flexible than the stock ones the arms will absorb more bumps. (Not positive just trying to use logic). The stock ones seem more suited for carpet for high grip. But i'm using a stiff 3mm chassis and the stock arms, and ever since i got the right set-up i don't think it would be neccesary...but still probably an advatage.
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Old 06-27-2005, 01:47 AM   #11901
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Axel, yes the optional plastic arms. I run on low-traction track so might as well give it a try. Tnx.

CE!
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Old 06-27-2005, 09:36 AM   #11902
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Quote:
Originally Posted by nw racer
what do you do to perform the upper deck mod, and why is it done?
Aside from drilling out the holes... you'll have to do the o-ring mod as well.
you'll need: 2 o-rings, 2 cone washer, 2 button head screw. assemble as shown. do not tighten screw all the way down. should be about .5mm-1mm gap between the washer and upperdeck.
see pics.

nw racer: the purpose for this mod to help minimize any chassis tweak in the event of a hard crash. just drill out the hole just big enough for the screw head to pass through. the car will still be stiff with the stock chassis and upperdeck and you'll not have to change your driving style...what kind of track are you running? if you're running carpet at Raincity. recommend getting the stiffer 3mm chassis and upperdeck. asphalt..stay with the stock set-up.

centax error!.... the arms are great for low traction tracks...they are hard to get and available overseas. another option is stay with the stock arms and get the 2mm chassis.
Attached Thumbnails
Hpi Pro 4-pro4-mod-1.jpg   Hpi Pro 4-pro4-mod-2.jpg   Hpi Pro 4-pro4-mod-3.jpg   Hpi Pro 4-pro4-mod-4.jpg  
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Old 06-27-2005, 10:24 AM   #11903
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hey did you countersink your upper arm mounts and use flathead screws in place of the button heads? looks like there is no button head in the oversize hole on the upperdeck?
if no nice! i was gonna do that so the screw head can have no interaction with the upper deck.

also what motor heatsink are you u using?
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Old 06-27-2005, 10:28 AM   #11904
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Quote:
Originally Posted by floodo1
hey did you countersink your upper arm mounts and use flathead screws in place of the button heads? looks like there is no button head in the oversize hole on the upperdeck?
if no nice! i was gonna do that so the screw head can have no interaction with the upper deck.

also what motor heatsink are you u using?
very observant you are... yes no button head screw.. used a flat head with cone washer. so you don't have to buy new screws.
motor heatsink is from Eagle/Integy. can be found on Ebay or direct from Integy.
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Old 06-27-2005, 04:46 PM   #11905
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Quote:
what kind of track are you running? if you're running carpet at Raincity. recommend getting the stiffer 3mm chassis and upperdeck. asphalt..stay with the stock set-up.
Right now I am running at the Rain, but there is a new track opening up much closer to where I live, which from the sounds of it is going to be asphalt.

Do the o-rings that you put inside the front carriers work for the o-ring mod?
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Old 06-27-2005, 04:48 PM   #11906
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Quote:
Originally Posted by nw racer
Right now I am running at the Rain, but there is a new track opening up much closer to where I live, which from the sounds of it is going to be asphalt.

Do the o-rings that you put inside the front carriers work for the o-ring mod?
yea..heard about the track opening up near Ikea... hope it's finished next time I visit the area.

any std rc o-ring will work fine.
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Old 06-27-2005, 04:51 PM   #11907
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They are saying they will be open August 1st, at least that is when they hope to be opening the doors.

Thanks for your help, I will pick up the parts on Friday and do the mod after I race. The LHS close to me doesn't carry jack for Pro 4 parts so can't do it till I get to the Rain.
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Old 06-27-2005, 08:02 PM   #11908
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Default steering tweak in crash

has anyone had a problem when they brush up against a wall or board and the car will not center correctly? im gonna try that o-ring trick that was posted and maybe that will help. if anyone has had this problem it would be greatly apreciated if someone has a solution. by the way the guy with the yokomo bd for sale how did it feel as far as handeling compared to the pro4. thanks
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Old 06-27-2005, 08:32 PM   #11909
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Hey guys i'm thinking about getting a Pro 4. I have a TC4 right now and I race rubber tires on carpet. Is the hara version worth the extra money? Or will the standard kit work out fine? I was on the HPI site and they alot of rubber tire setups. I just want a solid kit like my TC3 was I'm just sick of AE.
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Old 06-27-2005, 08:36 PM   #11910
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i believe the hara kit is designed for asphalt.
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