HoBao H4E Pro touring car kit
#706
Tech Regular
iTrader: (2)
The HPI Sprint2 is not all that bad for entry level sedan car. We sell lots at the LHS for VTA and an oval class that is run locally. We recommend replacing most of the rod ends with Lunsford or RPM 4-40 type cups. There is a nut on the servo saver that comes loose 99% of the time and that contributes to lotsa steering slop.
A drive shaft type car is always best for a stony/debris environment. Belts usually don't last long. There are several of these type cars at reasonable prices available.
A drive shaft type car is always best for a stony/debris environment. Belts usually don't last long. There are several of these type cars at reasonable prices available.
Last edited by rcwck; 10-08-2014 at 05:08 PM. Reason: MoInfo
#707
Tech Rookie
Thanks for the replies guys. I was just looking at upgrades for the Sprint 2 (like aluminum parts and carbon chassis) to make it really handle well but it's tough to justify the upgrades when a kit like this one comes in at the same price as a fully upgraded S2 and this one looks to be higher quality. Just want to make sure it doesn't make more sense to start with another platform, or just say screw it and upgrade the S2 and enjoy it. All the guys here at work are already buying nicer cars and I don't know that I can keep up with their spending habits, so upgrading the S2 incrementally might work better for my needs. I just don't want to be the one running a crappy car while they all run laps around me with their higher end kits (one of the guys here is waiting for his H4 to be delivered). Luckily I think I'm a better driver than most of them.
I'm actually waiting for my RPM cups to arrive this week.
I'm actually waiting for my RPM cups to arrive this week.
#708
Thanks for the replies guys. I was just looking at upgrades for the Sprint 2 (like aluminum parts and carbon chassis) to make it really handle well but it's tough to justify the upgrades when a kit like this one comes in at the same price as a fully upgraded S2 and this one looks to be higher quality. Just want to make sure it doesn't make more sense to start with another platform, or just say screw it and upgrade the S2 and enjoy it. All the guys here at work are already buying nicer cars and I don't know that I can keep up with their spending habits, so upgrading the S2 incrementally might work better for my needs. I just don't want to be the one running a crappy car while they all run laps around me with their higher end kits (one of the guys here is waiting for his H4 to be delivered). Luckily I think I'm a better driver than most of them.
I'm actually waiting for my RPM cups to arrive this week.
I'm actually waiting for my RPM cups to arrive this week.
http://www.rctech.net/forum/electric...-sows-ear.html
#709
All the guys here at work are already buying nicer cars and I don't know that I can keep up with their spending habits, so upgrading the S2 incrementally might work better for my needs.
I think it would be more fun to whip your co-workers with a more stock looking car than one that is blinged out. Create a sleeper! Show them you know how to tune a car ...not just throw $$ at it (it really won't make you or your car perform better w/o knowledge of how each part is actually effecting the car).
#710
by the way,
my season is officially done.
my H4 performed really well. I only broke that CVA joint in the first race it ran at the beginning of the season. I replaced it w/ the upgraded version from Ofna, no issue for the remaining 6 months worth of races. The car ran strong, consistent and was a contender in every race I ran. At this point I am mostly improving my own skills, staying on line and working on getting the best grip I can. The car is really doing everything I ask. Couldn't be more pleased w/ this car and how it performed all season.
Going to be tearing it down over the winter, checking every part and getting ready for next spring 2015 season! Oh, also plan on painting a new body for the 2015 season. My 2014 body held up well, but has some cracking around the front and front wheel arches.
my season is officially done.
my H4 performed really well. I only broke that CVA joint in the first race it ran at the beginning of the season. I replaced it w/ the upgraded version from Ofna, no issue for the remaining 6 months worth of races. The car ran strong, consistent and was a contender in every race I ran. At this point I am mostly improving my own skills, staying on line and working on getting the best grip I can. The car is really doing everything I ask. Couldn't be more pleased w/ this car and how it performed all season.
Going to be tearing it down over the winter, checking every part and getting ready for next spring 2015 season! Oh, also plan on painting a new body for the 2015 season. My 2014 body held up well, but has some cracking around the front and front wheel arches.
#711
Tech Regular
iTrader: (2)
First carpet race of the season
We had our first Carpet race of the new season last weekend. The H4(dark blue car) started second and finished 2nd. This was the 8 minute VTA Main. Good job Mike and it's very difficult to keep up with Erik.
https://www.youtube.com/watch?v=MHp2wajaDr4
This is the sedan 17.5 stock class. Turnout was a bit small because the weather is still nice here and there are still outdoor activities. H4(black monster car) on the pole and the win.
https://www.youtube.com/watch?v=f1xpYWRqI_o
Filmed with a GoPro extreme wide angle config.
https://www.youtube.com/watch?v=MHp2wajaDr4
This is the sedan 17.5 stock class. Turnout was a bit small because the weather is still nice here and there are still outdoor activities. H4(black monster car) on the pole and the win.
https://www.youtube.com/watch?v=f1xpYWRqI_o
Filmed with a GoPro extreme wide angle config.
#712
Way to go RCWCK, and way to go H4
-my diff is leaking like crazy again. I've had this problem in the past and usually cleaning everything, drying, and putting back together solves the issue. -until I have to open it up again.
It is a really finicky process, I've now done the process 2x and it still leaks. I've checked the o ring, it is in great shape. I even tried putting some green slime on it this time. Still leaked.
I am kind of sick of the rear diff leaking and how finicky the thing is ...I'd like to be able to open it dump the oil, wipe clean, replenish and go. I don't have time to go through this crazy process at the track!
Question, is there a recommended replacement rear diff that will work? One that obviously does not leak? Something from another company like XRay? Kind of done playing around w/ this diff'.
edit: I looked through the posts on this thread, I did not see an alternative diff that is recommended. Only the wipe clean and green slime fix.
thanks,
-my diff is leaking like crazy again. I've had this problem in the past and usually cleaning everything, drying, and putting back together solves the issue. -until I have to open it up again.
It is a really finicky process, I've now done the process 2x and it still leaks. I've checked the o ring, it is in great shape. I even tried putting some green slime on it this time. Still leaked.
I am kind of sick of the rear diff leaking and how finicky the thing is ...I'd like to be able to open it dump the oil, wipe clean, replenish and go. I don't have time to go through this crazy process at the track!
Question, is there a recommended replacement rear diff that will work? One that obviously does not leak? Something from another company like XRay? Kind of done playing around w/ this diff'.
edit: I looked through the posts on this thread, I did not see an alternative diff that is recommended. Only the wipe clean and green slime fix.
thanks,
#713
Tech Regular
iTrader: (2)
Way to go RCWCK, and way to go H4
-my diff is leaking like crazy again. I've had this problem in the past and usually cleaning everything, drying, and putting back together solves the issue. -until I have to open it up again.
It is a really finicky process, I've now done the process 2x and it still leaks. I've checked the o ring, it is in great shape. I even tried putting some green slime on it this time. Still leaked.
I am kind of sick of the rear diff leaking and how finicky the thing is ...I'd like to be able to open it dump the oil, wipe clean, replenish and go. I don't have time to go through this crazy process at the track!
Question, is there a recommended replacement rear diff that will work? One that obviously does not leak? Something from another company like XRay? Kind of done playing around w/ this diff'.
edit: I looked through the posts on this thread, I did not see an alternative diff that is recommended. Only the wipe clean and green slime fix.
thanks,
-my diff is leaking like crazy again. I've had this problem in the past and usually cleaning everything, drying, and putting back together solves the issue. -until I have to open it up again.
It is a really finicky process, I've now done the process 2x and it still leaks. I've checked the o ring, it is in great shape. I even tried putting some green slime on it this time. Still leaked.
I am kind of sick of the rear diff leaking and how finicky the thing is ...I'd like to be able to open it dump the oil, wipe clean, replenish and go. I don't have time to go through this crazy process at the track!
Question, is there a recommended replacement rear diff that will work? One that obviously does not leak? Something from another company like XRay? Kind of done playing around w/ this diff'.
edit: I looked through the posts on this thread, I did not see an alternative diff that is recommended. Only the wipe clean and green slime fix.
thanks,
You could also install another shim on top of the stock ring. That would help it to seal but would also create more drag/wear.
Might even try a thin coat of atv/silicone glue around the ring pocket before installing it making sure all is very clean beforehand. I would also let that glue cure with the ring installed before continuing.
Hope you figure it out without creating a Frankensedan.
#714
uh, i think it is leading from the large o-ring that is inside the rear diff'. There is a main o ring that is supposed to create a seal between the two halves of the rear diff assembly. It seems oil is leaking from this spot as I can see it leaking onto the outside of the gear teeth. It makes a huge mess as it gets all over the belts and such.
thanks, I may go to the hardware store, ..they have a ton of o rings. Will just look for one that is a tad thicker w/ the same OD. I think that is the issue, the supplied o ring is just a tad too small ...or if they made that channel that the o ring sits in not so deep then I could get a better seal.
thanks, I may go to the hardware store, ..they have a ton of o rings. Will just look for one that is a tad thicker w/ the same OD. I think that is the issue, the supplied o ring is just a tad too small ...or if they made that channel that the o ring sits in not so deep then I could get a better seal.
#715
Tech Regular
iTrader: (10)
We had our first Carpet race of the new season last weekend. The H4(dark blue car) started second and finished 2nd. This was the 8 minute VTA Main. Good job Mike and it's very difficult to keep up with Erik.
https://www.youtube.com/watch?v=MHp2wajaDr4
https://www.youtube.com/watch?v=MHp2wajaDr4
#717
We had our first Carpet race of the new season last weekend. The H4(dark blue car) started second and finished 2nd. This was the 8 minute VTA Main. Good job Mike and it's very difficult to keep up with Erik.
https://www.youtube.com/watch?v=MHp2wajaDr4
This is the sedan 17.5 stock class. Turnout was a bit small because the weather is still nice here and there are still outdoor activities. H4(black monster car) on the pole and the win.
https://www.youtube.com/watch?v=f1xpYWRqI_o
Filmed with a GoPro extreme wide angle config.
https://www.youtube.com/watch?v=MHp2wajaDr4
This is the sedan 17.5 stock class. Turnout was a bit small because the weather is still nice here and there are still outdoor activities. H4(black monster car) on the pole and the win.
https://www.youtube.com/watch?v=f1xpYWRqI_o
Filmed with a GoPro extreme wide angle config.
Way to go RCWCK, and way to go H4
-my diff is leaking like crazy again. I've had this problem in the past and usually cleaning everything, drying, and putting back together solves the issue. -until I have to open it up again.
It is a really finicky process, I've now done the process 2x and it still leaks. I've checked the o ring, it is in great shape. I even tried putting some green slime on it this time. Still leaked.
I am kind of sick of the rear diff leaking and how finicky the thing is ...I'd like to be able to open it dump the oil, wipe clean, replenish and go. I don't have time to go through this crazy process at the track!
Question, is there a recommended replacement rear diff that will work? One that obviously does not leak? Something from another company like XRay? Kind of done playing around w/ this diff'.
edit: I looked through the posts on this thread, I did not see an alternative diff that is recommended. Only the wipe clean and green slime fix.
thanks,
-my diff is leaking like crazy again. I've had this problem in the past and usually cleaning everything, drying, and putting back together solves the issue. -until I have to open it up again.
It is a really finicky process, I've now done the process 2x and it still leaks. I've checked the o ring, it is in great shape. I even tried putting some green slime on it this time. Still leaked.
I am kind of sick of the rear diff leaking and how finicky the thing is ...I'd like to be able to open it dump the oil, wipe clean, replenish and go. I don't have time to go through this crazy process at the track!
Question, is there a recommended replacement rear diff that will work? One that obviously does not leak? Something from another company like XRay? Kind of done playing around w/ this diff'.
edit: I looked through the posts on this thread, I did not see an alternative diff that is recommended. Only the wipe clean and green slime fix.
thanks,
#718
I use 500k diff lube to seal the o rings and my diff doesn't leak any more . Beware 500k its more like a grease and if you put to much on the drive o rings it will need time to "break in" sort to speak. It will cause your drive rotation to be stiff like your locking the rear diff but after a while it will loosen up. It will leak for a little bit but once the 500k sets say good bye to leakage. Next build I will try 100k I think 500k is overkill
I notice that after taking apart (again) and re-cleaning everything that it wasn't leaking this morning. -So i may be okay for now.
#719
Thanks, I thought about increasing the weight of the diff oil to stop the leaking, but the 1,000 seems to be working for me performance wise. I have some 10k maybe i'll try that since it shouldn't make much of a performance difference but is slightly thicker and may help w/ the leaky diff.
I notice that after taking apart (again) and re-cleaning everything that it wasn't leaking this morning. -So i may be okay for now.
I notice that after taking apart (again) and re-cleaning everything that it wasn't leaking this morning. -So i may be okay for now.
#720
ah, yeah, 500k seemed really heavy/thick.
I took my diff apart, cleaned, blasted with air gun to be sure I got every drop of moisture and grease out. Filled w/ 7000k oil and put back together.
It's been 3 days and no leaking. I have rotated the diff every morning before work and still it is staying dry.
So far I am good, wondering if i just wasnt drying it enough before or if the heavier weight oil is helping. Regardless I am happy that I have no leaks.
I took my diff apart, cleaned, blasted with air gun to be sure I got every drop of moisture and grease out. Filled w/ 7000k oil and put back together.
It's been 3 days and no leaking. I have rotated the diff every morning before work and still it is staying dry.
So far I am good, wondering if i just wasnt drying it enough before or if the heavier weight oil is helping. Regardless I am happy that I have no leaks.