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Old 04-27-2005, 12:59 PM   #1141
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Default Re: need help real bad

Quote:
Originally posted by SA_Racer
I managed to get out to the track today and tried my 1/12. I cant find anything wrong with the car but I cant get it to run in a straight line, cornering is also very twitchy and mostly just spins out.

The car setup is as follows for asphalt

10 Deg Uprights
.022 springs
1 deg camber
Brace removed
Purple fronts
Hitec servo mounted flat
4.5 mm clearance

Rear
Dampening washers
40wt oil and olive spring
Pink tyres

I checked tweak…..OK
No bearings are binding
Tried the diff loose and tight
Tried compound on rear wheels only as well as rear and front.

It seems no matter what I do, as soon as I go on power , I loose the car. If I accelerate slowly or freewheel it goes perfectly straight
Put the 5 degree caster blocks on the front. You might even want to try the 0 degree blocks if you can get the body to fit in the front. Add more static caster (both white shims in the front position). You should be using the thin T bar (.063) and only two screws where the T bar mounts to the lower motor pod plate. Always use 12 balls in the diff. You should be able to lock the diff up and the wheels spin freely. The distance from the center line of the car and the outside edges of the rear wheels should be equal. You did not mention what you are using on your dampener discs but the softer the side to side movement of the motor pod, the more rear traction. The only other thing you might try is mounting the servo at an angle to minimize the bump steer.
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Old 04-27-2005, 01:45 PM   #1142
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Hi all,

Just wondered, are there any plans to make a "TRUE" lowered rear pod ??

Just as it stands, the smallest rear tires i can go too is 46mm (before i drop below 4mm ride height) and to be honest they are still very useable !!

Other than this the car is great

Sorry if this has been asked earlier in the thread but i must have missed it

Thanks again

Rod
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Old 04-27-2005, 02:42 PM   #1143
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SA_Racer...
I agree with the info posted... The Hitec servo will not center... I tried it in a 1/18 car and it didn't work!! The thin t-bar with 2 screws would help too. I really think it's the Hitec servo causing all the problems. What tire traction did you try?

Merciless...
How much droop do you have in the rear pod? On carpet I'll run 1mm droop and run my tires to 44mm with the #4 adj. and have 3.3 to 3.4mm clearance at the back corners of the chassis. I start to loose traction when the tires get to 44.5mm at the end of the race. There doesn't seem to be enough rubber to keep traction the full 8 minutes, but even lower plates can be talked about. I just didn't have any luck with them. Let me run it by Jason!!


Wayne
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Old 04-27-2005, 02:44 PM   #1144
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im very happy with the BMI chassis..i was faster at my local track for a change..the handling was superb man what are you guys gonna come up with next...Thanks for designing a car that accually works~Jason
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Old 04-27-2005, 02:48 PM   #1145
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Glad you like it... You have a PM!!

Wayne
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Old 04-27-2005, 02:58 PM   #1146
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Default Re: need help real bad

Quote:
Originally posted by SA_Racer
I managed to get out to the track today and tried my 1/12. I cant find anything wrong with the car but I cant get it to run in a straight line, cornering is also very twitchy and mostly just spins out.

The car setup is as follows for asphalt

10 Deg Uprights
.022 springs
1 deg camber
Brace removed
Purple fronts
Hitec servo mounted flat
4.5 mm clearance

Rear
Dampening washers
40wt oil and olive spring
Pink tyres

I checked tweak…..OK
No bearings are binding
Tried the diff loose and tight
Tried compound on rear wheels only as well as rear and front.

It seems no matter what I do, as soon as I go on power , I loose the car. If I accelerate slowly or freewheel it goes perfectly straight

Have you tried different rear tires...i know this sounds silly but i tried pinks(rear) at my track and had the same effect but when i changed to greys or whites the car came back to me no matter what i did ...just trying to help
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Old 04-27-2005, 03:06 PM   #1147
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Quote:
Originally posted by sg1
SA_Racer...
I agree with the info posted... The Hitec servo will not center... I tried it in a 1/18 car and it didn't work!! The thin t-bar with 2 screws would help too. I really think it's the Hitec servo causing all the problems. What tire traction did you try?

Merciless...
How much droop do you have in the rear pod? On carpet I'll run 1mm droop and run my tires to 44mm with the #4 adj. and have 3.3 to 3.4mm clearance at the back corners of the chassis. I start to loose traction when the tires get to 44.5mm at the end of the race. There doesn't seem to be enough rubber to keep traction the full 8 minutes, but even lower plates can be talked about. I just didn't have any luck with them. Let me run it by Jason!!


Wayne
1mm of droop to but i'm trying to stay over 4mm ground clearence always (bumpy tracks)

There just seems to be more useable life in those tires when i run out of spacers to raise the rear

Thanks for the quick reply too !!
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Old 04-27-2005, 03:11 PM   #1148
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Merciless...
Try starting your tires larger and change ride hgt. adj. Where do you start at?? I go up to 48.25 and the car still feels good. You can glue the side walls if you want to go a bit bigger. Just a thought...

Wayne
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Old 04-27-2005, 03:20 PM   #1149
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not to change the subject but what about a carbon fiber axle from BMI that would be sharp real sharp
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Old 04-27-2005, 03:44 PM   #1150
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Quote:
Originally posted by sg1
Merciless...
Try starting your tires larger and change ride hgt. adj. Where do you start at?? I go up to 48.25 and the car still feels good. You can glue the side walls if you want to go a bit bigger. Just a thought...

Wayne
Big tires are cool, i just don't want to have to throw them out so fast just cause there getting down alittle.

Cheers, but i know what the adj.'s are for and how to use them.

I usually just take a mm or 2 off from new use them for a few club race nights till i get them down to 46/47 then save them for events but when they go down to 45mm or so i like to be able to use them again for club nights where possible just to save the £'s

there's no fun i buying tires all the time just cause i can

Anyway if the lowered pod is possible that'd be really kool and i'm sure they'd sell !!
It might make a welcome up-grade for new kits as using the spacers to raise the axel ain't all that bad on the Knife i used to run

Last edited by Merciless; 04-27-2005 at 05:24 PM.
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Old 04-27-2005, 03:54 PM   #1151
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maciless
found you

had a shock last friday running my 1/12th had to raise the rear pod cos i lost 5 mm of tyre through wear in one evening

also i brought some carbon fibre spacers that go under the front blocks to get the ride hight down
they are i piece jobbies undo both screws on front just slide the i piece thingy in come in 1.0mm,1.5mm.2.0mm sections
fibrelyte is the company
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Old 04-27-2005, 04:04 PM   #1152
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Quote:
Originally posted by MR JOLLY
maciless
found you

had a shock last friday running my 1/12th had to raise the rear pod cos i lost 5 mm of tyre through wear in one evening

also i brought some carbon fibre spacers that go under the front blocks to get the ride hight down
they are i piece jobbies undo both screws on front just slide the i piece thingy in come in 1.0mm,1.5mm.2.0mm sections
fibrelyte is the company

Hi Colin !!

Good to hear from you and i hope your well ?

Got the fibrelyte spacers good ain't they, really easy to use too.

But thaks for thinking of me and posting !!

Rod
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Old 04-27-2005, 08:26 PM   #1153
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SG1>> Your stuff went out!!!!!!
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Old 04-28-2005, 06:23 AM   #1154
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Bud,
I hope you didn't let Tang touch any of it!!!
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Old 04-28-2005, 06:40 AM   #1155
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Wayne did you get thosw pics lastnight?if so what did ya think?
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