[mspv12]

Hi guys and gals.

Looking for any ideas as to why my new 906 fly Porsche has suddenly started to run very slow. With full throttle applied, the car will not drive off without a push. Once running, it seems like it's doing about 50% power, but even 50% should get it moving off the line. There doesn't appear to be any rubbing. Wheels all turn freely. The car is fitted with a scalextric saloon chip.

Thanks for any advice.

 

[ixwa]

If you move this question to the Scalextric digital sub-forum, you're more likely to get helpful responses. Right now it is kinda hanging out in the lobby between all the different digital brands!

 

[MrFlippant]

Questions:

1) if programed to the same ID, do any other cars behave the same way?
2) what power base are you using?
3) are you using any race management software?
4) what happens if you left the rear and gun it? Does it speed up, or slow down, or only go slow?

It sounds like maybe the chip is having problems. Is that your only Fly? If not, do you have any others with the same motor, gearing, and magnet?

 

[mspv12]

Hi Greg.
Other cars on that ID act normally
Latest powerbase 7042
No software (just yet)
Engine revs when wheels raised, but not very fast.

I will re-chip it and see what happens. I have not had much luck with the scaley chips. Four bad out of ten!

 

[MrFlippant]

Don't put another Scaley chip in that fly, then.
It sounds like it's burning out chips.
It could have a motor that isn't in good condition, pulling too many amps, and slowly overloading the chip.
You can get a slot.it chip and install that.
If there's not enough space for it, you can get the scaley chip upgraded (fix the blown ones, don't buy new ones to upgrade) by gmyers. He replaces the mosfets and/or diodes according to a guide that RichG published a while ago. If you're good at fine soldering, you can do it yourself. For about the same price as a new chip, you send in a bad chip and get back a SUPER chip that can handle any motor you throw at it.

 

[mspv12]

Update.

Have corresponded with gymers. I will send him some old chips to mod for my next batch of cars. In the meantime, with regard to the 906, I fixed it last night.

Looking at it with fresh eyes, I noticed the small gear on the motor shaft was actual touch the inner side of the rear tyre! Adjusted that and it runs great again! Whoo Hoow! She is still extremely tail-happy though! On the look out for tickier tyres now, or purhapas try adding some weight over the rear axle???

 

[MrFlippant]

Ah, so it was a mechanical issue. That rubbing made it go slow and made the motor draw too much power constantly, burning out the motor.
The upgraded chips will be a good investment, though, rather than buying new chips. With those, you can run whatever motor you want with no worries.

Have you sanded the tires to get better grip yet? Start there. If that's not enough, soften them with a drop of 3-in-1 oil on each tire, rubbed in, and let it dry. If that's not enough, just put a small amount of weight at the back as near the axle as you can.

 

[Martyn_]

My fly 906 came fitted with what look like wheelbarrow tyres!

Ground them down about 3mm, glued and oiled them, much better performance. Have you got a mag in? Mines magless and the weight has gone by the nose. The motor position causes the tail wagging, more weight there is likely to make things worse.

But have a good play and see what works on your track with your style.

I have to be honest, it's the prettiest car I ever run.