Schumacher Corner
08-04-2005, 01:13 PM
I don't think you're wrong, but it seems wherever you gain in one area you often lose somewhere else.
The narrower rear diff reduces transmission rotating mass, but on the other hand running the belt over a larger diameter pulley (standard set-up) is more efficient than a smaller (layshaft) pulley - so the question is which combination works out better?
I agree that there may be a small amount of "lag" with front diff spool-up time, but, it's the rear that does most of the acceleration under power and the drive to the rear diff is the same as other belt drives.
By running this more conventional layout we might find that the car has a little more rip out of corners, but this may be at the expense of slightly less overall efficiency than the current set-up.
The narrower rear diff reduces transmission rotating mass, but on the other hand running the belt over a larger diameter pulley (standard set-up) is more efficient than a smaller (layshaft) pulley - so the question is which combination works out better?
I agree that there may be a small amount of "lag" with front diff spool-up time, but, it's the rear that does most of the acceleration under power and the drive to the rear diff is the same as other belt drives.
By running this more conventional layout we might find that the car has a little more rip out of corners, but this may be at the expense of slightly less overall efficiency than the current set-up.
08-04-2005, 02:32 PM
Originally Posted by xxxkat
For carpet what would be "the" hop ups that you need,Stock/19,rubber tires.What is wrong with the belt system that is on the Mi2 now?? If you like the belt system that teemu was testing you can get one now..It's called a Yokomo BD/415/Xray.. 
I have no problem with the curent belt system it seems as free if not more than the 415's and Xrays.
I have no problem with the curent belt system it seems as free if not more than the 415's and Xrays.
08-04-2005, 07:08 PM
The carpet track i race at I own..so rubber tires for stock it is.. (jk)I'm with Ruben on "it's what the racers want".I have the Teemu chassis and the carpet towers and the steel cvd's and the tamiya shocks,I guess i should get the one way.On the belt system I still think the stock system works great,I have way more "rip" corner to corner with my Mi2 than with my Tech or 415 and both the tech and 415 use the "short" belt.I guess if you think the belt system for the Mi2 is "slow" get another car..
(jk)I'm with Ruben on "it's what the racers want".I have the Teemu chassis and the carpet towers and the steel cvd's and the tamiya shocks,I guess i should get the one way.On the belt system I still think the stock system works great,I have way more "rip" corner to corner with my Mi2 than with my Tech or 415 and both the tech and 415 use the "short" belt.I guess if you think the belt system for the Mi2 is "slow" get another car..
08-05-2005, 07:44 PM
TTT 
08-05-2005, 07:48 PM
Hey guys just wanted to re-introduce my self. Names Fred Perkins. I am returning to on road racing and Schumacher. I'll have my old MI2 (tracked it down from england back to the USA, lucky I found it!!) in about 3 days. I am going to Frederick Maryland for some testing next Sat and again on the 19th and 20th for there trophy race. Any setup help would be appreciated so that I have some where to start.
Thanks
Fred
Thanks
Fred
08-06-2005, 02:06 AM
Has anyone else broken the saver arm.. 
Car was on rails got hit by a back marker and 
..only spare part I dont have..
Car was on rails got hit by a back marker and ..only spare part I dont have..
08-06-2005, 07:58 AM
Tech Regular
Yep, I broke about six of them in a three week span on carpet with foams. Then out of desperation at the track (due to lack of replacement parts) I found something that worked and am running it ever since.
Jim
Jim
08-06-2005, 09:57 AM
That would be a TC3 steering rack?? How did you mount your servo,I'm using the Teemu chassis and I'm not sure if i have enough room to mount the servo.
Last edited by xxxkat; 08-06-2005 at 10:26 AM.
08-06-2005, 12:42 PM
Tech Apprentice
(How much) Will the grip level reduce if I change from standard wishbones to c/f wishbones?
08-06-2005, 12:54 PM
Originally Posted by AN
(How much) Will the grip level reduce if I change from standard wishbones to c/f wishbones?
Nice to see another Swede in the forum by the way ;-)
08-06-2005, 06:09 PM
Hey Paul, what should we do for gearing on this? 
08-06-2005, 07:25 PM
Originally Posted by jimnew
Yep, I broke about six of them in a three week span on carpet with foams. Then out of desperation at the track (due to lack of replacement parts) I found something that worked and am running it ever since.
Jim
Jim
... just the slightest brush on a wall or another car would snap the steering arm... while we could hit all kinds of things with our MI2 and not break. Never did figure out why his car broke all those arms 
but Jim did a great job changing over to a TC3 rack at the track and only missed one qualifier 
08-06-2005, 07:44 PM
Mo and I each broke one during the Speedworld Cup. We were both on the stand during practice, I tapped a board, *snap*, a lap or two later and he tapped a board, *snap*.
08-06-2005, 07:49 PM
Those were both over a year old parts though. Generally if you are breaking a lot of those arms or bellcranks, you may have the servo saver set a little too tight. Back off the spring tension a little and it should be ok.
08-06-2005, 10:15 PM
Originally Posted by jimnew
Yep, I broke about six of them in a three week span on carpet with foams. Then out of desperation at the track (due to lack of replacement parts) I found something that worked and am running it ever since.
Jim
Jim