8LikesRoche Rapide F1-2016
05-02-2017, 01:36 PM
#241
I did this mod but also added 1mm under the pivot ball (making the chassis and rear pod plate flat) then also added 1mm under the rear balls on the lower pod plate.
05-02-2017, 08:42 PM
#244
As many have mentioned to me over the past few weeks. This evidently is not how the roll center of a pan car is raised. Supposedly its done only by raising the pivot points. I still don't understand the geometry of a pan car i guess.
However, with that said and dumb luck, i can tell you from lots of testing. This mod does make the car rotate better around a corner. F1's with Shimizu tires are very stuck in the rear on CRC black carpet in high grip. This helps free up the car.
I experimented with stock position, 1 mm, and 1.5 mm. 1.5 was way to much, very hard to drive. I'm currently running .75 mm and feel it's optimal.
I don't recommend this for low grip conditions. The car will spin-out mid corner.
Sometimes the best new discoveries are made by accident. If no one has tried this on a 12th scale it may be worth some experimentation. There were some things tried at MHIC this year that I've never seen before and they worked.
Last edited by bkspeedo; 05-02-2017 at 09:08 PM.
05-02-2017, 09:14 PM
#245
Tech Elite
Thread Starter
I would say don't raise the center pivot ball ever. Chassis designers put considerable effort into keeping it as low as possible. It is not a tuning option. It's late I'm grumpy. Stop the madness.
05-02-2017, 11:48 PM
#246
Tech Regular
Hi Ralph,
As many have mentioned to me over the past few weeks. This evidently is not how the roll center of a pan car is raised. Supposedly its done only by raising the pivot points. I still don't understand the geometry of a pan car i guess.
However, with that said and dumb luck, i can tell you from lots of testing. This mod does make the car rotate better around a corner. F1's with Shimizu tires are very stuck in the rear on CRC black carpet in high grip. This helps free up the car.
I experimented with stock position, 1 mm, and 1.5 mm. 1.5 was way to much, very hard to drive. I'm currently running .75 mm and feel it's optimal.
I don't recommend this for low grip conditions. The car will spin-out mid corner.
Sometimes the best new discoveries are made by accident. If no one has tried this on a 12th scale it may be worth some experimentation. There were some things tried at MHIC this year that I've never seen before and they worked.
As many have mentioned to me over the past few weeks. This evidently is not how the roll center of a pan car is raised. Supposedly its done only by raising the pivot points. I still don't understand the geometry of a pan car i guess.
However, with that said and dumb luck, i can tell you from lots of testing. This mod does make the car rotate better around a corner. F1's with Shimizu tires are very stuck in the rear on CRC black carpet in high grip. This helps free up the car.
I experimented with stock position, 1 mm, and 1.5 mm. 1.5 was way to much, very hard to drive. I'm currently running .75 mm and feel it's optimal.
I don't recommend this for low grip conditions. The car will spin-out mid corner.
Sometimes the best new discoveries are made by accident. If no one has tried this on a 12th scale it may be worth some experimentation. There were some things tried at MHIC this year that I've never seen before and they worked.
It is different story if you want to introduce some self steering of the rear wheels. On your car this could be done by changing the shims at the front of the links. Removing the shims should introduce roll oversteer.
DavidNERODease is right - you dont want to raise your rear roll center.
05-03-2017, 08:34 AM
#249
Interesting experiment, but I think the same effect could be accomplished by changing the side spring with harder ones. This would have exactly the same effect - raising the rear roll stiffness. Raising stiffness through the side springs is way more easier and flexible.
It is different story if you want to introduce some self steering of the rear wheels. On your car this could be done by changing the shims at the front of the links. Removing the shims should introduce roll oversteer.
DavidNERODease is right - you dont want to raise your rear roll center.
It is different story if you want to introduce some self steering of the rear wheels. On your car this could be done by changing the shims at the front of the links. Removing the shims should introduce roll oversteer.
DavidNERODease is right - you dont want to raise your rear roll center.
FYI, I'm already running Pink sides, stiffest Roche offers. I tried more pre-load, was not a fan. Makes that car to twitchy and more prone to traction rolling.
To each his own on what they like or want to try. I'm just passing along what I've found that works on CRC Black carpet. Your free to give it a try and provide your feedback.
05-03-2017, 09:34 PM
#252
I just ran the car at a local club track and noticed all the F1 had metal rear axles? coming from WGTR that had 4 screws and carbon axle and this is a nut and metal axle??? Why metal?
05-04-2017, 02:38 AM
#253
Tech Adept
05-04-2017, 05:59 AM
#255
Stiffer side springs on a foam car in hi grip generally encourages traction roll, at least that's what I do to prevent - soften. I had to go soft on side springs to prevent traction roll on my F1s as well. I don't understand how stiffer is better regardless of tire, and of course referring to crc high grip carpet that is.