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Old 08-19-2006, 12:26 PM   #331
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Thanks for the insight. Its hard to tell what comes with what, even between Pro/RTR on Ofna and Hobao's websites. I would like to order from Ofna, but I'm trying to justify the $175 price difference..
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Old 08-19-2006, 01:29 PM   #332
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Here are the extras and possibly more, I bought my Pro version from Nitrohouse.

22107 Graphite bumper plate for Hyper GPX4 Pro $13.56
22110 Muffler & manifold set for Hyper GPX4 Pro $40.76
22117 Chassis 4mm-CNC 7075 for Hyper GPX4 Pro $54.36
22130 Alu. Wheel hub, 4pcs $24.61
22131 Alu. Supporter brace(L) $25.46
22132 Alu. Supporter brace(R) $16.96
22160 Alu. CNC front anti-roll bar set, 2pcs $44.16
22215 Titanium Pivot Balls Don't know price
22213 Titanium Turnbuckles (steering rods) Don't know price
22214 Titanium Turnbuckles (camber rods) Don't know price
22162 Graphite body support plate $13.90

I've been racing this car for about 10 months now. The only part that I would not recommend is the Graphite bumper plate. I made my bumper plate out of kyvek plastic but as for everything else I have not replaced any of the listed parts above and I race my car 2 to 3 times a month (very durable car). The Ofna brand from Nitrohouse.com is what I would call a Pro Spec because of all of the hop ups it comes with, it's race ready. Hope this helps, good luck.
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Old 08-19-2006, 04:05 PM   #333
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Man, thanks for taking the time to break all that down and post. Even before reading your post I had decided to buy from my LHS.

I was driving by his store this morning and he had a parking lot race going. He has been working on this for the last two years. Finally got the city to ok the use of a new parking lot. He then spent $10,000 on AMB, and removable track setup. Not a purpose built track like some of you are lucky enough to have access to, but its a start
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Old 08-29-2006, 11:28 PM   #334
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Last edited by Bulkhead; 09-09-2006 at 04:22 AM.
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Old 09-10-2006, 07:30 AM   #335
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Guys,
I have had a look at the 0.8 gear options for the GPX-4 and can't seem to get the right combo and rules of thumb for the split and do any other 0.8 gears fit the GPX-4 like Mugen,K factory,Kyosho etc. I run a small medium grip twisty tight track with 65m main straight.

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Old 09-10-2006, 05:35 PM   #336
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Quote:
Originally Posted by Taffyjnr5
Guys,
I have had a look at the 0.8 gear options for the GPX-4 and can't seem to get the right combo and rules of thumb for the split and do any other 0.8 gears fit the GPX-4 like Mugen,K factory,Kyosho etc. I run a small medium grip twisty tight track with 65m main straight.

Taffyjnr5

You can start off with 21/27 pinion and 60/54. If you want more top speed and maintain the low end change your spur gears to 59/53. I think the 6 tooth max split is a rule of thumb due to ratio to maintain a smooth and effective transition from 1st to 2nd gear. As for your other question about do other gears fit, I personally run both GPX4 and Mugen gears, as well as 1st and 2nd gear housings with no problems.
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Old 09-11-2006, 08:53 PM   #337
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Default Two Speed Shoe

Do mugen two speed shoes and accessories work on GPX4 pro because the shoe are getting hang on second gear
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Old 09-12-2006, 08:28 AM   #338
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Quote:
Originally Posted by Quietroit
Do mugen two speed shoes and accessories work on GPX4 pro because the shoe are getting hang on second gear

Q, Yes, but since the two speed shoe accessories, mainly the weighted balls are not interchangeable you will have to buy the hardware for the 2 speed shoes. I had 2 speed issues in the beginning from 2 speed sticking, to bearing sliding out of 2nd speed housing. I then tried mugen parts and had success. I measured all the parts that I exchanged out, 2nd speed housing, 2 speed shoes, and they are identical in dimension. I since went back to Hobao/Ofna 2 speed and found that they are made a lot better then before.

Ensure your 2 speed is put together properly:
1. your two halves are equally screwed in.

2. screw in the 2 balls just enough to create a gap but not too much to cause the two halves to touch the 2nd speed housing.

3. Check all components are still in working condition especially the 2 speed clutch adaptor. Mine ended up getting grooved because the balls where not screwed in all the way to the shaft.

good luck
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Old 09-18-2006, 05:09 AM   #339
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Hi,
My front and rear belts are too tight compared with the other cars I race against MTX-4/G4's. I have read a few pages back that there are other belts to try Kyosho sp belt and MTX-3 rear are these a looser belt or just more durable than the standard bando belts.

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Old 09-18-2006, 08:01 AM   #340
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Default GPX4 #1

The purpose of changing out the bando belts is for durabilty/ longevity. In order to smooth out your ride you have to loosen up the belts. Just like Asar wrote, I left the rear belt alone and let it break-in itself. As for the front I put 3 thin washers, .75mm thick, in the mid-block tilting the block forward to free up the front belt. Man did all this do wonders. I finally was able to get the car to freely roll through the turns this weekend. This is definetly a must if you want to go faster. This car is awesome.
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Old 09-19-2006, 03:20 AM   #341
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Default Titanium stuff

Thanks for the info.I am also having problems trying to find Titanium parts like 9mm pivot balls and 3mm hinge pins I have found a screw kit on Ebay but thats all. Thanks again!!...

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Old 09-19-2006, 08:07 AM   #342
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Are you able to get the mugen titanium pivot balls? If so use them. As for the titanium hinge pins try and find the longest 3mm Tit rod and cut to desired length(s). Hope this helps.
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Old 09-19-2006, 07:31 PM   #343
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I thought the Mugen ones were 8mm not 9mm but I may be wrong. Thanks

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Old 09-19-2006, 11:46 PM   #344
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Hi I just going to try my new GPX4 pro this sunday with sts.12 any recomendations?? I belive this is a serious competitive car... I will compete against an HPI r40 hara edition do you think is this a better car??
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Old 09-20-2006, 07:37 AM   #345
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Quote:
Originally Posted by Taffyjnr5
I thought the Mugen ones were 8mm not 9mm but I may be wrong. Thanks

Taffyjnr5

Taffy, you are right? I just compared both of them. In this case you will have to find Kyosho or G4 9mm Pivot balls like for the RRR, 05-RR or G4 Another option is just buy the Hobao direct replacements and polish them yourself. I've used them and they work just fine.
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