NTC3 fuel guzzler

[Ryacap]

For those of you who werent there on the 25th, there is a segment in the latest newsletter explaining what I am talking about below.

For those of you that were at Kingston on the 25th that saw my Associated NTC3 siphen a full tank of fuel into and out the exhaust every time you start it, I think I may have found the problem.

After trying everything I pulled the engine(OS .12 TZ 5 port) out and found that there was fuel 'running' out the front bearing. So obviously it has a serious leak.
Could that be causeing the problem some how? Usually when a front bearing goes you run lean though?
Other than that everything is fine.

[rodders47]

I some how doubt that a leaking front bearing would be the cause Ryan.

Reason: as you said it would normally make the motor run LEAN, not put backward pressure on the fuel supply line !

Do you have a manual that came with the car? If so check out the fuel tank, maybe there is a one way valve in it! that is not working properly?

Apart from that you have me beat mate

[TOFAST]

this may sound silly , but have you got the fuel lines plugged into the right outlets , sounds like the pressure line is on the tank outlet ,also is the sleeve in the motor in the right position ?
very strange problem indeed
buggered bearings would not cause this one

[rodders47]

Gidday Rocket.

Yep tried all that as well the fuel pick up goes naturally to the bottom of the tank, BUT the Presure fitting goes almost to the bottom of the tank but made no difference at all swapping them around !!

[aussie racer]

hi have read about your problem and try checking the exhaust stinger for any blockages. this will cause the pressure line to over pressurize and push all the fuel through the motor and out and it only takes the slightest blockage too do this...........

[rodders47]

Hi Rocket , Ryan.

Yeah as rocket said "Have you taken the sleeve out of the motor at all".

Maybe if it is in the wrong way around ie. exhaust port where the Inlet port should be, that may cause a back pressure in the fuel pick up line !!

First of all I suspected the pressure fitting in the silencer being too far inside the silencer, thus causing a venturi effect and sucking the fuel out, but we rectified that problem to no avail ?

[idawina]

are you spinning the engine the right way?

NTC3's need the starter table to run in reverse to spin the engine in the correct direction, because the motor is mounted on the opposite side to normal. just swap the + and - on the statrer table battery

trust me, this has cought me out with my ntc3 before!
hope it helps!

[rodders47]

yep I thought that as well but the car goes forward when running

Even if it did run backwards how would that make fuel SPURT out of the fuel tank from the pressure fitting point on the tank ? If the motor is running it MUST be sucking in fuel to the carby even if running backwards, correct ?

[TOFAST]

bloody yanks , always building things backwards

[Ryacap]

Thanks for the help guys but Ive solved the problem by selling the car and buying a Kyosho Evolva 1/8th.

[TOFAST]

now ya talkin dude

[Nyssa]

Thanks for the help guys but Ive solved the problem by selling the car and buying a Kyosho Evolva 1/8th.

What a bout the poor guy who brought the car off you? Or did you fix the prob?

[rodders47]

I am sure he fixed the problem.

Are you going to come back down to Kingston for a race meeting NYSSA?

We have quite a number in the 1/10th Nitro "B" class at the moment, why not come down and enjoy the racing .

[Ryacap]

Nyssa, the buyer new of the problem he just wanted it for spares for his TC3.

[Nyssa]

I am sure he fixed the problem.

Are you going to come back down to Kingston for a race meeting NYSSA?

We have quite a number in the 1/10th Nitro "B" class at the moment, why not come down and enjoy the racing .

Im thinking about it, i have been to busy but just changed my work hours so i have weekends off, so maybe ill come for a look see on Sunday 23rd i STILL have no idea what im doing but hey ill give it ago once i retune my nitro.

[rodders47]

well nyssa if you have problems tuning just ASK either Ian or myself or any of the guys I am sure you will find them all only too willing and as I said the "B" class nitro is growing with a lot of people that are NEW to racing. Come on down and dont be afraid, everyone has to start somewhere