troublesome GTR!

[lukeyboy900]

sorted the porsche gluing to the track problem, turned the magnet over which has made it much more fun for both of us as i run the outer lane when we're side by side he wipes me out with the 911 rear end. we are having much more fun than driving "glued" cars

[Busterfla]

I know that when I took my Stillen GT-R out and ran it on Scaley's new tires, it held pretty good and then when I went with Super Tires, they had a lower profile and the magnetic effect was increased. I compared it to my Ferrari 430 that was running in the "black window" class here and the Magnet Marshall said they were within 10 grams of each other (GT-R being lighter) and the GT-R ran better times because the motor was a real punchy sweet one (of course the Ferrari has many many laps on it too) The GT-R gives the Lambos (car of choice by many here) a real run for the money and I opened it up to all to see that there was no monkey business going on. Now, if I could only drive well.
Buster

[lukeyboy900]

i worked out that with the gtr i've loosened the front body screws a little and it can add some slide if it's less than the rear screws but understeer when looser than the rear, don't know why lol

[ElSecundo]

It's possible that it's not actually understeer. Could be that with the front screw loose, there could be some slight tire rub or other issue caused by the loose front. Check for any kind of rubbing or interference in the front end of the car.

[boopiejones]

the more you loosen the body, the more tendency for the car to roll out of the slot vs. fishtail. since scaley cars have a fairly shallow guide flag, it doesn't take much body roll before the car "understeers" out of the slot and goes straight instead of turning.

mess around with the screws until you find the sweet spot where the car is stable and will slide predictably at the limit rather than roll/understeer. i usually start with the front screws about 1/4 turn off tight and rear screws about 1 turn off, and make adjustments from there.

[lukeyboy900]

no interference at all, it does create understeer but it's also aids in "snap" oversteer which is instant de-slot so back to drawing board lol

[ElSecundo]

What have you already done to this point with your wheels and tires?

[lukeyboy900]

trued both cars wheels and tires, not glued them yet though, glued the bushings in and motor

[lukeyboy900]

trued wheels and tires, sanded all flash off wheels!

[Manimmal]

With your screws, use them like suspension, ie tight is stiff, loose is soft- make sense? I read 'how to make your car handle' for reference, and suspension principles apply even in our 75 gram rockets.
When you first had your issue, should you have been running sans magnet then loosening the rear screws would help it to turn with reduced oversteer.

[lukeyboy900]

i've tried with the body tight to the chassis and it does make a little difference but it brings back the problem of "snap" oversteer

[ElSecundo]

How is the body float? Can you flex the rear wheels, and nothing 'catches'?

Also, is the motor in this car more punchy at the low rpm's than the other car you race it with?

[lukeyboy900]

it's a typical scaley chassis so the body also rests on the front and rear lower lips, so it's not a hovering chassis per-se.

[ElSecundo]

Originally Posted by lukeyboy900

it's a typical scaley chassis so the body also rests on the front and rear lower lips, so it's not a hovering chassis per-se.

That doesn't help.
Is this a 6-screw chassis, with two middle screws holding an interior in place? If so, pop those screws out.

[lukeyboy900]

it's an IMPACT RESISTANT car so no interior lol