High speed G-maxx for ISC event, 100mph or bust

[JERRY2KONE]

Good test data so far River. My 2cents. Unfortunately I believe the only way you are going to reach your (speed)goal is from a lot more testing and trying different effects. Running a 1/8 scale vehicle at those speeds takes a lot of tweeking to get all of the variables just right. The ones I have seen up to now that do very well were running with a body that covers the entire vehicle, including the wheels, which prevents or elliminates alot of the turbulance and push that you will see. Take a good look at todays "Funny Cars" and see what you can use from that technology. You might try fabricating your own wedge type body out of thin lexan sheeting. This type of body will give you more control and also give you more protection for your equipment in the event of a roll over at high speeds.

Your steer pull issue does sound more like natural torque steer from your drivetrain. This is something that is almost impossible to over come completely. A strong servo setup and the Gyro may help though. It is good to see what you what are going through in order to learn what (to do & Not to do) when my project gets to that point. Good effort River, and good luck.

[JThiessen]

Jerry - per the MT speed rules your body cant cover the wheels, so he's stuck with something close to standard width. He may be able to extend one out to almost touch the wheels though.

River - I would almost think that a light diff fluid may help with the torque steer. If not, you may have to get good at setting up your chassis to compensate. I'm going off memory here - can you adjust the maxx arms front to back at all? You may have one wheel sitting slightly forward of the other which could cause a slight drift.

Maybe also try adding a shim to the spring on the uphill/crown side of the truck.

[Rivermaxx]

Originally Posted by JThiessen

Jerry - per the MT speed rules your body cant cover the wheels, so he's stuck with something close to standard width. He may be able to extend one out to almost touch the wheels though.

River - I would almost think that a light diff fluid may help with the torque steer. If not, you may have to get good at setting up your chassis to compensate. I'm going off memory here - can you adjust the maxx arms front to back at all? You may have one wheel sitting slightly forward of the other which could cause a slight drift.

Maybe also try adding a shim to the spring on the uphill/crown side of the truck.

The body cant cover the tires in the open wheel class. I was told by Nic Case that a spool or locked front diff is what I want thin dif fluid will have the opposite effect I want. The front will unload one tire quicker causing drift or torque steer. If its locked or close to it, both tires have to spin the same speed no matter what causing the truck to pull itself straight. I dont know if you guys noticed the arms are the short old style rpm arm so they are not adjustable. I did put some more toe in in the front to help with high speed stability, I will lyk how it works out. Not sure if a shim will help either the truck is pulling toward the side with the most traction. It was pulling toward the crown so if I shim that side it will put more pressure down causing more traction and more pull now if I put it on the other side it might help. My springs are adjustable so no need for shims just preload one side more than the other.
Jerry, I have seen plenty of open wheel cars go fast. Look @ the fastest top fuel cars, 230+ mph indy formula 1 cars, and outlaw cars. I also have seen a few open wheel buggies go 100mph+ and a few 80mph revos, and 1 that went 91.2mph . So I know it can be done it just getting everything set up just right and lots of testing like you said. Remember this is my first real test with the proper tires and I allready am doing 67mph. How many maxxes have you seen, heardor read about going that fast on radar? I know I might have read about 1 or 2 and thats it.
How do you guys like this open wheel design? I am thinking of stealing the front wing design. Will more smaller stablizers front and rear be as good as big ones on the rear. Kinda like a indy car.