T-Maxx tuning question

[bruce]

Hi

I've just run in my t-maxx 2.5 according to the book.
HSN 4 turns out, slow and steady. So i've started to tune the engine
according to the book 1\16 of a turn in, test repeat. Problem is I've
got just below three turns out on the HSN and it still seems to be
rich, lots of smoke ect. I tested it very briefly at 2 1/2 turns and
it seemed fine lots of power no sign of overheating. I'm using Tornodo
16% fuel. Can you guys clue me in, have I gone to far on the HSN.

Thanks for your help.

[Frater Mus]

On Fri, 11 Jun 2004 at 16:24 GMT, <brucefarrell@esatclear.ie> wrote:

> I've just run in my t-maxx 2.5 according to the book.
> HSN 4 turns out, slow and steady. So i've started to tune the engine
> according to the book 1\16 of a turn in, test repeat. Problem is I've
> got just below three turns out on the HSN and it still seems to be
> rich, lots of smoke ect. I tested it very briefly at 2 1/2 turns and
> it seemed fine lots of power no sign of overheating. I'm using Tornodo
> 16% fuel. Can you guys clue me in, have I gone to far on the HSN.

You haven't gone too far until it *acts* like you've gone too far.

Some 2.5 engines want to run at under 3 turns out. It depends on the
carb, the engine, the fuel, etc.

I am unfamiliar with that fuel so I cannot comment on it.

--
L.V.X., brother mouse
http://www.mousetrap.net/otr/ Old Time Radio trades
http://makeashorterlink.com/?K16312E06 CBS Radio Mystery Theater database
http://greyhound.mousetrap.net/altus/ retired racing dog

[ben]

"bruce" <brucefarrell@esatclear.ie> wrote in message
news:11c3327b.0406110824.677ae59e@posting.google.c om...
> Hi
>
> I've just run in my t-maxx 2.5 according to the book.
> HSN 4 turns out, slow and steady. So i've started to tune the engine
> according to the book 1\16 of a turn in, test repeat. Problem is I've
> got just below three turns out on the HSN and it still seems to be
> rich, lots of smoke ect. I tested it very briefly at 2 1/2 turns and
> it seemed fine lots of power no sign of overheating. I'm using Tornodo
> 16% fuel. Can you guys clue me in, have I gone to far on the HSN.
>
> Thanks for your help.

If its not overheating and theres smoke then its not too far. My t-max is
about a 3/4 of a gallon old, and it is only just set up correctly. havnt
needed to adjust it for last 3 runs and it screams. But every run seems to
have just a bit more power, still losening up I suppose.

Spend the time getting it right and it should stay somewhere near. Not all
engines are the same and have different tuning needs. You will know when its
right ;-)

Col.

[Andrew Fitzgerald @ GT]

Yeah, I figured this out, I was just kinda fishing for comments to see how
many people with a TMaxx have been able to find a tune where it wheelies at
WOT like they try to tout it in the advertising. The thing is so feaking
quick to me as I come from the world of Nikko 7.2V electric cars, like you
find in the display case at ToyRUs. I'm quite happy as it is, and I'll be
even happier once I stop breaking things!!



"ben" <ben@ben.co.uk> wrote in message news:wr_yc.208$1W6.60@newsfe2-win...
>
> I just bought a Ofna/Hobao pirate 10 monster it has too much power. It
> wheelies when you start off, it wheelies when you reach 2/3 throttle and
it
> flips over forwards with a gentle touch of the brakes. Its undrivable. If
> your t-max is just short of wheelies and needs a bump or incline to get it
> there dont worry. Being driveable is far better than having a wheelie
truck.
> i know I have both ;-)
>
> Col.
>

[Frater Mus]

On Sun, 13 Jun 2004 at 05:04 GMT, <qx1010@bellsouth.net> wrote:

> forth trying to get rid of bogging off idle, cutting off after a full
....
> I have yet to reach a point where my Maxx wheelies readily. Only a slight
> incline or bump to lift the front wheels can get the car's nose off the
> ground on acceleration. Any comments?

Both symptoms indicate a low-end problem which might be a function of:
* too fat on the LSN
* too cold/short/old/wrong glowplug
* high density altitude (as the pilots might say -- thin air)
* etc

It will be interesting to see what the others think.

--
L.V.X., brother mouse
http://www.mousetrap.net/otr/ Old Time Radio trades
http://makeashorterlink.com/?K16312E06 CBS Radio Mystery Theater database
http://greyhound.mousetrap.net/altus/ retired racing dog

[Bert Olton]

Frater Mus wrote:
> Both symptoms indicate a low-end problem which might be a function of:
> * too fat on the LSN
> * too cold/short/old/wrong glowplug
> * high density altitude (as the pilots might say -- thin air)
> * etc
>
> It will be interesting to see what the others think.
>

I think you're right on the money there Frater Mus - Andrew needs some
more LSN adjustment. Andrew - are you doing the pinch test between
runs? Once you've got your HSN dialed in, follow the Low Speed
adjustment instructions on pg 35 of the manual to the letter. That'll
get your engine cranking out it's best without hurting it. Two to two
and a half seconds to shut down...And the stuff about paying attention
to the weather conditions (particularly temperature and air density)
really makes a big difference.

Don't forget humidity!! The chart on that same manual page spells out
the adjustments for that. An 80 degree day with 40% humidity requires
different settings than an 80 degree day with 90% humidity. Kind of
like the old "full military power" of dumping some water into the
intakes for more hp output.

Sounds like a lot to keep track of - and it is - but these little bitty
engines are very sensitive. Once you get the hang of the micro
adjustments though, it's a lot of fun to be able to do them automatically.

Last note: Don't worry too much about wheelies. To quote the manual,
"When the low speed needle is set correctly, the engine's throttle
response should be very quick, *possibly* [emphasis mine] even to the
point of making it difficult to keep the T-Maxx from doing a wheelie
when you accelerate!" My T-Maxx has never, even new out of the box and
set up by an expert, done full out wheel stands. It always torques into
raising the right front wheel off the ground on take off and it digs and
sprints like crazy, but it's not a wheelie monster without a tiny bump
to help.

Bert
--
To all who have served or are serving the cause of freedom, from
whatever country, whether in peace or in war, at home or abroad, thank you.

"Let's roll!" Todd Beamer, Flight 93, September 11, 2001.

[Andrew Fitzgerald @ GT]

Yeah, I do the pinch test. Yes I understand and compensate when the weather
changes. I was just mostly curious to hear the anecdotal evidence as to how
wheelie prone other's Tmaxxs are.


"Bert Olton" <artorius@redsuspenders.com> wrote in message
news:2j6c6lFtd4lqU1@uni-berlin.de...
> Frater Mus wrote:
> > Both symptoms indicate a low-end problem which might be a function of:
> > * too fat on the LSN
> > * too cold/short/old/wrong glowplug
> > * high density altitude (as the pilots might say -- thin air)
> > * etc
> >
> > It will be interesting to see what the others think.
> >
>
> I think you're right on the money there Frater Mus - Andrew needs some
> more LSN adjustment. Andrew - are you doing the pinch test between
> runs? Once you've got your HSN dialed in, follow the Low Speed
> adjustment instructions on pg 35 of the manual to the letter. That'll
> get your engine cranking out it's best without hurting it. Two to two
> and a half seconds to shut down...And the stuff about paying attention
> to the weather conditions (particularly temperature and air density)
> really makes a big difference.
>
> Don't forget humidity!! The chart on that same manual page spells out
> the adjustments for that. An 80 degree day with 40% humidity requires
> different settings than an 80 degree day with 90% humidity. Kind of
> like the old "full military power" of dumping some water into the
> intakes for more hp output.
>
> Sounds like a lot to keep track of - and it is - but these little bitty
> engines are very sensitive. Once you get the hang of the micro
> adjustments though, it's a lot of fun to be able to do them automatically.
>
> Last note: Don't worry too much about wheelies. To quote the manual,
> "When the low speed needle is set correctly, the engine's throttle
> response should be very quick, *possibly* [emphasis mine] even to the
> point of making it difficult to keep the T-Maxx from doing a wheelie
> when you accelerate!" My T-Maxx has never, even new out of the box and
> set up by an expert, done full out wheel stands. It always torques into
> raising the right front wheel off the ground on take off and it digs and
> sprints like crazy, but it's not a wheelie monster without a tiny bump
> to help.
>
> Bert
> --
> To all who have served or are serving the cause of freedom, from
> whatever country, whether in peace or in war, at home or abroad, thank
you.
>
> "Let's roll!" Todd Beamer, Flight 93, September 11, 2001.

[Bert Olton]

O.K...sorry for the long lecture there! <humble seg>...

Bert


Andrew Fitzgerald @ GT wrote:

> Yeah, I do the pinch test. Yes I understand and compensate when the weather
> changes. I was just mostly curious to hear the anecdotal evidence as to how
> wheelie prone other's Tmaxxs are.


--
To all who have served or are serving the cause of freedom, from
whatever country, whether in peace or in war, at home or abroad, thank you.

"Let's roll!" Todd Beamer, Flight 93, September 11, 2001.