R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road

Reply
 
Thread Tools Search this Thread
Old 09-20-2008, 12:33 AM   #736
Tech Elite
 
Taffyjnr5's Avatar
 
Join Date: Oct 2005
Location: QLD
Posts: 2,033
Trader Rating: 32 (100%+)
Default

Hi,
I have tested my GPX-4 Pro with some mods I made and and the car handles fantastic and is quite fast. I used Xray NT-1 rear hubs and ceramic bearings and CVD's and NT-1 front hubs and CVD's and ceramic bearings I also modified the NT-1 rear shock tower to fit the GPX-4 and I used a Mugen clutch and spur gears I also used an RB-R3 Murnan/Novarossi 2630 pipe. I have a set of Serpent 720 shocks to try and I will let you know how that goes.
__________________
Sworkz EVOII LE/Hobbywing/Protek
Roche Rapid F1/Hobbywing/LRP
Taffyjnr5 is offline   Reply With Quote
Old 09-22-2008, 04:14 PM   #737
Tech Apprentice
 
Undies's Avatar
 
Join Date: Mar 2006
Location: Australia
Posts: 98
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Taffyjnr5 View Post
Hi,
I have tested my GPX-4 Pro with some mods I made and and the car handles fantastic and is quite fast. I used Xray NT-1 rear hubs and ceramic bearings and CVD's and NT-1 front hubs and CVD's and ceramic bearings I also modified the NT-1 rear shock tower to fit the GPX-4 and I used a Mugen clutch and spur gears I also used an RB-R3 Murnan/Novarossi 2630 pipe. I have a set of Serpent 720 shocks to try and I will let you know how that goes.
Hey Taffyjnr:

Good to see you are still using your GPX4. Interest to know how you compare it to the NT1 and why are you using NT1 bits on it?

Thanks
Undies is offline   Reply With Quote
Old 09-23-2008, 06:11 AM   #738
Tech Elite
 
Taffyjnr5's Avatar
 
Join Date: Oct 2005
Location: QLD
Posts: 2,033
Trader Rating: 32 (100%+)
Default

Quote:
Originally Posted by Undies View Post
Hey Taffyjnr:

Good to see you are still using your GPX4. Interest to know how you compare it to the NT1 and why are you using NT1 bits on it?

Thanks
Hi,
I had them spare as I have an NT-1 as my primary car. I used the NT-1 parts to try and get rid of some/all of the slop/movement in the geometry to be able to set it up to be more consistant. I have been very surprised how well is goes and can match my lap times I do with my NT-1.I have some serpent 720 shocks to try on it next see how that goes OK.
__________________
Sworkz EVOII LE/Hobbywing/Protek
Roche Rapid F1/Hobbywing/LRP
Taffyjnr5 is offline   Reply With Quote
Old 09-24-2008, 11:24 PM   #739
Tech Elite
 
Taffyjnr5's Avatar
 
Join Date: Oct 2005
Location: QLD
Posts: 2,033
Trader Rating: 32 (100%+)
Default

Hi,
Here are some pics of the rear end mods.
Attached Thumbnails
Hobao GPX4 Pro-gpx4d.jpg   Hobao GPX4 Pro-gpx4e.jpg  
__________________
Sworkz EVOII LE/Hobbywing/Protek
Roche Rapid F1/Hobbywing/LRP
Taffyjnr5 is offline   Reply With Quote
Old 10-20-2008, 07:25 AM   #740
Tech Elite
 
Taffyjnr5's Avatar
 
Join Date: Oct 2005
Location: QLD
Posts: 2,033
Trader Rating: 32 (100%+)
Default

Hi,
Is anyone else still running this car??
__________________
Sworkz EVOII LE/Hobbywing/Protek
Roche Rapid F1/Hobbywing/LRP
Taffyjnr5 is offline   Reply With Quote
Old 10-20-2008, 05:47 PM   #741
Tech Apprentice
 
Undies's Avatar
 
Join Date: Mar 2006
Location: Australia
Posts: 98
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Taffyjnr5 View Post
Hi,
Here are some pics of the rear end mods.
How have you found the car since you made your changes to the rear end? I have thought about getting one of these, but since the aussie dollar has taken a nose dive it is less appealing.

Thanxs
Undies is offline   Reply With Quote
Old 10-21-2008, 08:16 AM   #742
Tech Elite
 
Taffyjnr5's Avatar
 
Join Date: Oct 2005
Location: QLD
Posts: 2,033
Trader Rating: 32 (100%+)
Default

Hi,
The changes have made the car much easier to drive and it has freed up the driveline very nicely. I am now looking at modifying the Hobao oneway to convert it to a locker/spool to help with tuning. I am also going to give the serpent shocks a run on it this weekend to see how they go.

I might have my GPX-4 Pro up for grabs shortly as I am going to focus on 1/8th scale.........
__________________
Sworkz EVOII LE/Hobbywing/Protek
Roche Rapid F1/Hobbywing/LRP
Taffyjnr5 is offline   Reply With Quote
Old 12-05-2008, 07:57 PM   #743
Tech Regular
 
grassrootsracer's Avatar
 
Join Date: Jul 2007
Location: Brisbane
Posts: 378
Trader Rating: 20 (100%+)
Wink Less torsion flex please

Hey guys, I run a GPX4 (not the Pro) and have had some good results with the car and it's easy to work on. However, I find that the top chassis is a bit soft and can be compressed... even if only marginally when placing the car from your hands to the track.

This causes the distance between the throttle servo and the engine to change, and thus affecting the engine idle by causing a tweak against the carby from the idle.

Has anyone else noticed this??? And if so, has anyone come up with a solution to stiffen the area between the radio plate and the rear gear box area of the car? I would be glad to hear any suggestions, thanks.
__________________
*RC RACING RETIRED - FAILED*

Orange County, California..... Taoyuen, Taiwan..... Heemstede, Netherlands..... Slacks Creek, Queensland
grassrootsracer is offline   Reply With Quote
Old 03-07-2009, 01:27 AM   #744
Tech Elite
 
Taffyjnr5's Avatar
 
Join Date: Oct 2005
Location: QLD
Posts: 2,033
Trader Rating: 32 (100%+)
Default

Hi,
Any news on the new car yet??...............
__________________
Sworkz EVOII LE/Hobbywing/Protek
Roche Rapid F1/Hobbywing/LRP
Taffyjnr5 is offline   Reply With Quote
Old 03-24-2009, 08:38 PM   #745
Tech Adept
 
three50zx's Avatar
 
Join Date: Mar 2005
Location: Texas
Posts: 103
Trader Rating: 2 (100%+)
Default Adjustable Front One-way to solid

Hi All,
I finally had time to work on one of my front one way housings to make it an adjustable solid. I took pictures of my work below. I put a slight flat spot on both out drives and tapped a hole in the housing just after the inner one-way on both sides. I tested it and it seems to work. Of course i used thread lock to keep the set screw from coming out. Now just simply unscrew the set screws and you have a one-way, just like the newer cars. The only mod is to drill out and add a set screw. Some more mods to come.

Thanks,
Ken Dubb
Attached Thumbnails
Hobao GPX4 Pro-gpx4-pro-frt-one-way.jpg   Hobao GPX4 Pro-gpx4pro-frt-one-way-car.jpg  
three50zx is offline   Reply With Quote
Old 03-25-2009, 02:13 AM   #746
Tech Elite
 
Taffyjnr5's Avatar
 
Join Date: Oct 2005
Location: QLD
Posts: 2,033
Trader Rating: 32 (100%+)
Default

Nice work...........
__________________
Sworkz EVOII LE/Hobbywing/Protek
Roche Rapid F1/Hobbywing/LRP
Taffyjnr5 is offline   Reply With Quote
Old 10-21-2010, 12:51 AM   #747
Tech Rookie
 
Join Date: Oct 2010
Posts: 1
Default

hello. i just got my gpx 4 pro and am lookin forward to racing it

Can anyone recommend a good place/club to race in sydney metro. also a place where they race 1/8 infero type cars. I am a novice

Last edited by fastnfurious; 10-21-2010 at 01:00 AM. Reason: test
fastnfurious is offline   Reply With Quote
Old 11-13-2010, 11:02 PM   #748
Tech Initiate
 
gpx4-slo's Avatar
 
Join Date: Aug 2005
Location: townsville
Posts: 24
Default gpx4 pro awsome

guys these are a good little car , one 1st place trophy for the championship first time i have raced , also there are soo many hints and tricks to these cars and yes you have to put up with soo much crap about them from mugen and kyosho drivers etc but imho for the price you cant go wrong unless your paid to drive rc "works or similair " the only thing ive done to mine is put the billet alloy centre shaft support and rear billet alloy support ,tilted the front support a very small amount to slacken the front belt tension use a v-one rrr rear belt diffrent springs and i set the brake really soft also set the controler so the brake is realy slow to 90% and only the last 10% full brake , the other thing i like about these is they havent changed them for ages unlike other mobs that bring out new cars evey year so the old ones are useless cos there not the latest . anyway enjoy it and develop it to the max .oh and while all others are using sirio and nova rossi etc i used a good ole os .12 and it still kicked ass
gpx4-slo is offline   Reply With Quote
Old 04-02-2011, 06:00 PM   #749
Tech Apprentice
 
Join Date: Apr 2011
Posts: 57
Smile GPX4...

Hi, everybody...

Is there anyone running this car yet?

I've seen many great tips on this thread, it will help me a lot to increase the car performance...

I've bought a RTR version one month ago, and I'm very happy with the car handly!

I've been running rubber tyres, but i'm want to buy some foam tyres... what brands of tyres are recommended?

I'm thinking to convert my car in the PRO version, buying the spare parts oh the PRO version at RC Mart... what do you think?
guilcm123 is offline   Reply With Quote
Old 04-13-2011, 11:40 AM   #750
Tech Apprentice
 
Join Date: Apr 2011
Posts: 57
Default anybody

no one else?
guilcm123 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hobao GPX4 Pro grassrootsracer Australia Wanted to Buy 4 06-15-2008 10:49 PM
HoBao GPX4 Pro hooked_on Australia For Sale/Trade 2 12-08-2007 12:54 AM
HoBao GPX4 Pro w/ STS 12 D3R hooked_on Australia For Sale/Trade 0 12-01-2007 01:22 AM
HPI R40 vs Hobao GPX4-PRO ernstb Nitro On-Road 3 02-27-2007 12:16 PM
HOBAO GPX4 hobby racr Singapore R/C Racers 0 12-12-2005 03:58 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 03:56 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net