HPI RS4 MT problem

HPI RS4 MT problem

Post by strider67 » Thu, 23 May 2002 09:37:29



I just recently purchased the HPI RS4 MT in a kit form from tower
hobbies.The ESC that they (T.H.) put in the kit will not fit were the
instructions show,as a matter of fact it will not fit any were with out
hacking half of the cross member off.I wote to HPI no help,Tower hobbies no
help .It seem a shame to have to put the truck under the knife just to make
things fit.
I know I'm not the first to run across this problem.If I have to cut, then I
guess thats what I wil lhave to do . When Tower Hobbies make up a kit I
guess nobody checks to see if every thing fits .  OOPS sorry venting

                             BOB

 
 
 

HPI RS4 MT problem

Post by dimo » Thu, 23 May 2002 11:37:29


well, that's the exact same car i got, and i had the same problem.  i don't
know what kind of speed control you got with it (does t.h. come with the
streak?) but i have the lrp runner plus reverse, and had the same problem.
on the runner plus, the heat sinks come off, (in fact, i lost one in a race
on my 'foot) and it fits that way.  but if you can't take them off, just
don't use the cross member.  it's just there for support, but the chassis is
strong enough, and light enough to where you usually won't need it.  just
don't hack it in half, because then your center of gravity will be off to
one side, and you will have to get balancers (i know it's not much, and the
esc will probably offset it, but it makes it asymetrical, and i'm a
perfectionist).

try running it a few runs with out the crossmember, and if you really have a
problem with support, try a different speed controller.

hope this helps, and good luck with your 4-drive fun machine!

--
--dimoz.


Quote:

> I just recently purchased the HPI RS4 MT in a kit form from tower
> hobbies.The ESC that they (T.H.) put in the kit will not fit were the
> instructions show,as a matter of fact it will not fit any were with out
> hacking half of the cross member off.I wote to HPI no help,Tower hobbies
no
> help .It seem a shame to have to put the truck under the knife just to
make
> things fit.
> I know I'm not the first to run across this problem.If I have to cut, then
I
> guess thats what I wil lhave to do . When Tower Hobbies make up a kit I
> guess nobody checks to see if every thing fits .  OOPS sorry venting

>                              BOB


 
 
 

HPI RS4 MT problem

Post by Lee Ca » Fri, 24 May 2002 03:06:11


I don't know which ESC Tower Hobbies put into the bundle for you but now you
know to never buy a Tower Hobbies combo.  Despite their good intentions,
Tower Hobbies' combo deals typically are not well thought out, as you've
discovered.

Anyway, see if you can sell the ESC on eBay and buy something else that
fits.  ESC size is very critical for HPI RS4 MTs because of their tight
chassis configuration.  If you must have a forward and reverse ESC, try the
Futaba MC230CR or MC330CR.  These are fairly small reversing ESCs.

If you feel a little rich, get an LRP Quantum Reverse, which is just about
the smallest reversing ESC you can buy.

BTW, you may also discover that the ESC-to-Motor wire length will be an
issue.

Good luck.

Lee Cao


Quote:

> I just recently purchased the HPI RS4 MT in a kit form from tower
> hobbies.The ESC that they (T.H.) put in the kit will not fit were the
> instructions show,as a matter of fact it will not fit any were with out
> hacking half of the cross member off.I wote to HPI no help,Tower hobbies
no
> help .It seem a shame to have to put the truck under the knife just to
make
> things fit.
> I know I'm not the first to run across this problem.If I have to cut, then
I
> guess thats what I wil lhave to do . When Tower Hobbies make up a kit I
> guess nobody checks to see if every thing fits .  OOPS sorry venting

>                              BOB

 
 
 

HPI RS4 MT problem

Post by Lee Ca » Fri, 24 May 2002 03:07:42



Quote:
> try running it a few runs with out the crossmember, and if you really have
a
> problem with support, try a different speed controller.

> hope this helps, and good luck with your 4-drive fun machine!

Since the cross member is part of the battery hold-down system, how do you
secure your battery packs?

Quote:
> --
> --dimoz.

Lee Cao
 
 
 

HPI RS4 MT problem

Post by HPIma » Fri, 24 May 2002 03:20:59


What kind of ESC is it?
I have a TEkin 420 G2 and I cant use the gold press-in heatsinks with
the ESC.  Fortunately it doesnt get too hot.

Garrett

Quote:

> I just recently purchased the HPI RS4 MT in a kit form from tower
> hobbies.The ESC that they (T.H.) put in the kit will not fit were the
> instructions show,as a matter of fact it will not fit any were with out
> hacking half of the cross member off.I wote to HPI no help,Tower hobbies no
> help .It seem a shame to have to put the truck under the knife just to make
> things fit.
> I know I'm not the first to run across this problem.If I have to cut, then I
> guess thats what I wil lhave to do . When Tower Hobbies make up a kit I
> guess nobody checks to see if every thing fits .  OOPS sorry venting

>                              BOB

 
 
 

HPI RS4 MT problem

Post by HPIma » Fri, 24 May 2002 03:30:38


Heres a PIC.
Notice the ESC barely fits beneath the chassis brace without the gold
heatsinks.  I just run the esc with the MOSFETs exposed.

http://mediaservice.photoisland.com/auction/May/200252275533566795535...

Garrett

Quote:

> What kind of ESC is it?
> I have a TEkin 420 G2 and I cant use the gold press-in heatsinks with
> the ESC.  Fortunately it doesnt get too hot.

> Garrett


> > I just recently purchased the HPI RS4 MT in a kit form from tower
> > hobbies.The ESC that they (T.H.) put in the kit will not fit were the
> > instructions show,as a matter of fact it will not fit any were with out
> > hacking half of the cross member off.I wote to HPI no help,Tower hobbies no
> > help .It seem a shame to have to put the truck under the knife just to make
> > things fit.
> > I know I'm not the first to run across this problem.If I have to cut, then I
> > guess thats what I wil lhave to do . When Tower Hobbies make up a kit I
> > guess nobody checks to see if every thing fits .  OOPS sorry venting

> >                              BOB

 
 
 

HPI RS4 MT problem

Post by dimo » Fri, 24 May 2002 04:34:45


Quote:
> Since the cross member is part of the battery hold-down system, how do you
> secure your battery packs?

if you'll take a look at the body with nothing else on it, there is that
bridge that goes over the battery in the middle.  that is quite enough to
hold the battery down.

--
--dimoz.


Quote:



> > try running it a few runs with out the crossmember, and if you really
have
> a
> > problem with support, try a different speed controller.

> > hope this helps, and good luck with your 4-drive fun machine!

> Since the cross member is part of the battery hold-down system, how do you
> secure your battery packs?

> > --
> > --dimoz.

> Lee Cao

 
 
 

HPI RS4 MT problem

Post by Steve Godfre » Fri, 24 May 2002 06:05:51


I have a RS4 MT with a M.Tronics RV ESC, it fits nicely and there's
plenty of room let too!

On Wed, 22 May 2002 00:37:29 GMT, "strider675"

Quote:

>I just recently purchased the HPI RS4 MT in a kit form from tower
>hobbies.The ESC that they (T.H.) put in the kit will not fit were the
>instructions show,as a matter of fact it will not fit any were with out
>hacking half of the cross member off.I wote to HPI no help,Tower hobbies no
>help .It seem a shame to have to put the truck under the knife just to make
>things fit.
>I know I'm not the first to run across this problem.If I have to cut, then I
>guess thats what I wil lhave to do . When Tower Hobbies make up a kit I
>guess nobody checks to see if every thing fits .  OOPS sorry venting

>                             BOB

Steve G
Bristol, UK
RS4 MT leccy
 
 
 

HPI RS4 MT problem

Post by SBlackfoo » Fri, 24 May 2002 07:41:57


Quote:
> well, that's the exact same car i got, and i had the same problem.  i
don't
> know what kind of speed control you got with it (does t.h. come with the
> streak?) but i have the lrp runner plus reverse, and had the same problem.
> on the runner plus, the heat sinks come off, (in fact, i lost one in a
race
> on my 'foot) and it fits that way.  but if you can't take them off, just
> don't use the cross member.  it's just there for support, but the chassis
is
> strong enough, and light enough to where you usually won't need it.  just
> don't hack it in half, because then your center of gravity will be off to
> one side, and you will have to get balancers (i know it's not much, and
the
> esc will probably offset it, but it makes it asymetrical, and i'm a
> perfectionist).

Strong enough without the crossmember? Hardly... The MT's chassis is one of
it's weak points as it is (near the nose granted, but taking away a
structural member won't help). As well, it also stiffens the chassis which
is rather important, with the belt and all. Besides, the crossmember is
light enough so that even if he did slice it in half (also not recommended)
it wouldn't affect weight distrubution terribly much at all. A perfectionist
removing an important brace? As well, a stick pack would flop around an
awful lot and saddle packs would be a pain in the ass with the tape or
velcro straps you'd have to use.

To fit my Duratrax Blast (cheap but what the hell, I'm only running an old
Technigold) I had to notch the crossmember slightly and carefully tie up the
wires (they exit the ESC near the belt with my layout).

If you run without the inner body or are willing to cut into it a bit you
could probably get away with taping the ESC on it's side. Your centre of
gravity would be ever so slightly higher but honestly, would any of us
really notice?

 
 
 

HPI RS4 MT problem

Post by SiKin » Sat, 25 May 2002 00:16:58


Quote:

> I just recently purchased the HPI RS4 MT in a kit form from tower
> hobbies.The ESC that they (T.H.) put in the kit will not fit were the
> instructions show,as a matter of fact it will not fit any were with out
> hacking half of the cross member off.I wote to HPI no help,Tower hobbies no
> help .It seem a shame to have to put the truck under the knife just to make
> things fit.

I have had this problem with my SRooster.  Check

SiKing.

--
Will code for food, can perform minor miracles.
<http://resumes.dice.com/egeer987>