GT12 Help..

[mark christopher]

both my cars

[beale]

Very neat and tidy Mark which do you prefer?

[SlowOne]

Stu, the S1 chassis (missed that, sorry!) is the cause of your issues, along with some mighty heavy battery connectors and those 14g wires. Get rid of that lot before you try anything else.

Note also from Mark's cars that the one with the IS front end has virtually no lead on it and the beam one has enough lead to keep a bag of kittens at the bottom of the canal. Take the IS front end off if you still have it!

That is weight in completely the wrong place. Any weight forward of the servo will just make the car understeer - forward of the front axle line is like trying to turn a hammer quickly by holding it at the end of the shaft! I know, exaggeration on both counts, but you get the picture...

The reality is that if you get the car around 970g/980g you won't be any worse off than trying to get right down to the limit - that's 3% overweight, not a big deal. As you said yourself, the driving needs some work! Being 20g/30g overweight will make no difference if you have enough daylight between you and the apex to get another car through!

I'd be interested what Schumacher have to say, but I think we have sorted your problem now. HTH

[mark christopher]

Originally Posted by beale

Very neat and tidy Mark which do you prefer?

Originally Posted by SlowOne

Stu, the S1 chassis (missed that, sorry!) is the cause of your issues, along with some mighty heavy battery connectors and those 14g wires. Get rid of that lot before you try anything else.

Note also from Mark's cars that the one with the IS front end has virtually no lead on it and the beam one has enough lead to keep a bag of kittens at the bottom of the canal. Take the IS front end off if you still have it!

That is weight in completely the wrong place. Any weight forward of the servo will just make the car understeer - forward of the front axle line is like trying to turn a hammer quickly by holding it at the end of the shaft! I know, exaggeration on both counts, but you get the picture...

The reality is that if you get the car around 970g/980g you won't be any worse off than trying to get right down to the limit - that's 3% overweight, not a big deal. As you said yourself, the driving needs some work! Being 20g/30g overweight will make no difference if you have enough daylight between you and the apex to get another car through!

I'd be interested what Schumacher have to say, but I think we have sorted your problem now. HTH

Beale, the ifs one is my normal car but testing the set up at the moment, open verdict.

PDW your loosing it!!

the weights are to replace what's lost on the top car from fitting the zen wheels and axle, you will notice only 10g on the pod to balance it and not 30g, the ifs in that format is near enough the same as the kit front end.
20g in front of speedo surplus from rear pod
20g on servo for wheels/axle

both cars with lw ascari body and cell are 955g ish

[stucartwright]

Wonderful stuff chaps. This great stuff,any thanks for the pictures Mark.

Now, I have a problem.... HELP!! (Yes another one... :-) )

My Toro no longer recognizes my Core RC Tranny.

I've tried resetting the end points; the service works, green light on receiver is on but the speedo, nothing. Won't reset, won't recognize anything from the tranny.

Is this something that has occurred with anyone else?

I am going to order the carbon chassis, strip the car down; apply Allll your recommendations and go from there.

But first I need to get my electrics sorted...

If it helps, the green light on the receiver had been coming up red when I turned on the ESC and then I would turn it off, then turn it back on and it would recognize it followed by the green light.

Tonight at a race meet, the motor did no spin and then I could reset the end points and now nothing.

The ESC goes through the end point setup until I set the full throttle end point, it doesn't recognize the tranny.

Hope I'm not repeating myself, just want to be clear...

Hope someone out there knows what I need to do... Urghhhh!!

Best Wishes
Stu

[mark christopher]

plug receiver into the throttle channel and make sure the chanel works ok.

[stucartwright]

Sorry Mark, don't understand....
"Receiver into the throttle channel"??

[stucartwright]

Do you mean ESC into steering channel and servo in throttle channel?

[beale]

Yes to your last post so you have power

[beale]

Seen a few people have issues with the core code systems, normally steering not centring but change of RX normally cures it. 1 guy gave up and has Spektrum ever since, not to say Spektrum are faultless

[stucartwright]

Morning Chaps...
Yes I tried that at the time. Nothing, dead.
Looking like a new receiver?

[mark christopher]

Sorry should be servo in throttle channel

[i4n]

If you've got the Core Tx, make sure that the throttle inhibit switch hasn't been moved (it's the one on the top right of the front face above the steering).

I was caught out with that several times thinking something had gone wrong

[stucartwright]

Oooh i4n that could be a winner.
Will try now!
Let you know....

[Danosborne6661]

Mines bang on 950g with the carbon chassis, and that's with around 80-90g added to the car in copper/lead!

You should be able to get yours down to that easy!

[SlowOne]

That's a really neat install Dan - good work buddy!

Stu... the Core RC... you're on your own there as far as I am concerned!

I see the lowered pivot mod for the GT is very popular!

Weight in front of the servo - not a good plan especially with the GT12 suspension designs. It makes the car lazy in direction change and tend towards understeer. Wherever possible put the weight behind the servo and in the middle of the car, except where you are using it to balance the pod or the chassis. Keep that to a minimum.

Note on Mark's cars he has spaced the motor a lot to the left of the car and so can avoid some weight on the other side of the pod. Not sure why he uses the same motor spacer and yet has 10g on one car and 30g on the other - wasn't it Mark saying the pod was best balanced? Why did you do that Mark?

As a rule of thumb, weight on the outside of the car also tends to make it less able to turn quickly. Dan's install has everything as central as he can get it, so the trade-off for having the servo too far forward is that the weight is more central in the rest of the car.

My install has the speedo to the left of the chassis like Mark's, so I keep the ballast in the middle. It's all a compromise!

None of these layouts is definitive. Although each is different, one will suit one driver's style and not another's. Keep in mind what things do to the handling of the car, but never be afraid to try something different as you may find the clock is telling you one is faster for your driving style. HTH

[Martin.s]

Hi all...

So I've fitted an alloy rear axel to my ssgt and now there is a fair bit of end float (around 2mm). The diff assembly is butted right up to the spacer that is part of the alloy axel, so I don't think it is that side that is causing the float. The left hand drive dog is fitted as far as it will go up against the spacer on that side of the axel but there is still a little gap there. I was just wondering if anyone had come,across this before...is it as simple as a new left hand drive dog? Is that where the issue could be?

This thread rocks....keep it going!

Martin

[Danosborne6661]

Originally Posted by SlowOne

Weight in front of the servo - not a good plan especially with the GT12 suspension designs. It makes the car lazy in direction change and tend towards understeer. Wherever possible put the weight behind the servo and in the middle of the car, except where you are using it to balance the pod or the chassis. Keep that to a minimum.

As a rule of thumb, weight on the outside of the car also tends to make it less able to turn quickly. Dan's install has everything as central as he can get it, so the trade-off for having the servo too far forward is that the weight is more central in the rest of the car.

If you were to draw a line so the axles meet on my car SlowOne, you'll notice only about 35% of the servo/receiver steps over the front axles. And when my servo is only 20g and the receiver is under 10g that works out to be a VERY small amount of weight over the front axle line.

I probably wouldn't do this if I had a heavier servo like the CoreRC though you're right, mine is exceptionally light with non-metal gears so I find any negative effect this may have is out-weighed by the narrow central weight. Set-up is always a compromise right?

[stucartwright]

Right... The car is back in the game... Had the throttle off switch flicked so now that's sorted, very kindly from Beale I think it was I am back in game.

Ordered my new carbon chassis and will strip the baby down tonight...

If anyone knows of a micro receiver that works with the Core RC Sport tranny I am all ears.

Failing that, I will be balancing and getting my car very similar to those images and following your wonderful guidelines and posting picks.

Does anyone have a link where I can get those battery connectors every uses in these images? I don't know what they're called.

Very excited to get the chassis, also ordered the alloy axle...

[stucartwright]

I4n it was that helped with my ESC receiver issue... Many thanks buddy!!