View Full Version : Please give me some pointers on weight jacking/ tweak


bimmerboy318
09-26-2009, 05:02 PM
I've got my SC18V2M built.

Where should I start with my tweak. I've got both screws tightened down just enough to touch the chassis.

This will be an oval car.

Basically I want to tighten the driver side tweak screw 1/4 turn at a time until I find a sweet spot in how the car drifts through the corner correct? Shouldn't I just completey remove the passenger side tweak screw then? Therefore putting the weight of the rear pod on the driver side tweak screw and more toward the left front of the car?

Also, I find that my chassis sags. The rear of the main chassis and pod kinda sag as the pivot ball point. How can I flatten this out? I would compress the dampener disk springs right? But then I will effectively stiffen the rear suspension and make the car looser?

I also find that the car wants to spin out on the straightaway. I think I need to tighten the diff but then it wants to spin out coming out of the corner. Maybe I need to turn down my throttle endpoint. I'm trying to run 5 cells with a Mamba 4200kv.

BudBartos
09-26-2009, 07:38 PM
Set tweek neutral to start.

Set diff so it slips sightly if You have it too tight it will spin the rear tires.

Move bottom damper collor up to remove some sag then adjust top for dampening action it is best to use 100 weight shock oil on dampener discs for lube.

4200 on 5 cell??? that also may be why You have some sag since the T plate is designed for 4 cell weight. We do sell a soild T plate also but we only used that on tracks that had pretty high bite. That could be way fast how is it geared?

What tire sauce are You using?

bimmerboy318
09-28-2009, 06:12 PM
After taking out the batteries it still sags. I wonder if I should take apart the pivot ball and re-assemble to make sure it's not binding up.

martian 710
09-28-2009, 06:40 PM
You can also put an extra washer or two under the front of the t-plate to raise it and eliminate sag.

bimmerboy318
09-28-2009, 07:00 PM
You can also put an extra washer or two under the front of the t-plate to raise it and eliminate sag.

I'll try that as well.

bimmerboy318
09-28-2009, 10:42 PM
Doesn't tweaking down on the right side add more weight to the right front? I thought you want to add weight to the left front?

BudBartos
09-29-2009, 09:27 AM
Doesn't tweaking down on the right side add more weight to the right front? I thought you want to add weight to the left front?
It depends on what You want the car to do thats why I suggest neutral to start. More weight on right front will take away steering more on left will give You more to the left. You don't need much of a difference to notice it.

ScottH
09-29-2009, 11:56 PM
Bud is right.

On our track 1 hour on the crew is a TON.

BudBartos
09-30-2009, 10:11 AM
Bud is right.

On our track 1 hour on the crew is a TON.

1 hour on the pit crew??? :)

ScottH
09-30-2009, 06:52 PM
Yeah, you should see the crew, LOL

Should be screw...