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> Corner Balance, Idiot check of percentages...
yeahmag
post Feb 18 2014, 04:44 PM
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I'm getting very close to aligning and corner weighting the car. What sort of percentages should i be looking for in cross and front to rear? I would guess 50% cross with me in it and closer to 45% front/55% rear.
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brant
post Mar 1 2014, 06:20 PM
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I can still feel my TB Diff...
If I go into a high speed sweeper and the car doesn't feel like its going to make it... I can mash the throttle and feel the line change and make the corner.

If I white knuckle and don't mash the throttle I usually drive off track
but the TB diff will slightly turn the car if you trust it and floor it right at the moment you don't think you will make the corner...

my old locked diff did the same thing but 4times more.
the only way around the corner with a locked diff was to
- kick the rear end out and then rotate the car..
- mash the throttle when the front end was pointing the direction you wanted to go in the rotation sequence.
- and go straight in the direction it was pointing

the big advantage to the locked diff was:
1) over cooking the braking zones in every single corner and making it due to the fact you were sliding sideways through the braking zone and cutting speed due to the slide.
2) being slightly faster due to the constant slide and practicing this style of loosing the car-catching the car... loosing the car-catching the car, in every single corner. The style taught you better reaction and better skilll at catching it. but it also made it a lot easier to mess up since you had to catch it 10-15 times per a lap.

The big advantage to the TB diff is
- the abilility to drive off line in the marbles or on wet or imperfect surfaces.
- the TB diff is a lot smoother. Just as good at full throttle-out and only gives up anything under braking. But MUCH better tire life and MUCH easier to drive due
to the technique differences.
- more forgiving of driver error, easier on the equiptment, and easier to maintain concentration...
- easier to be in traffic, since loosing controll side by side at 80mph is such a fine line when your 2 foot away from the other guys door.

if there was a driver error with the locked diff it was less forgiving
you would loose 5 car lengths to the next guy if he shut the door or you misjudged anything. I think it was faster on open laps, but you could never let up and never loose your momentum.
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toadman
post Mar 1 2014, 07:16 PM
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QUOTE(brant @ Mar 1 2014, 04:20 PM) *

I can still feel my TB Diff...
If I go into a high speed sweeper and the car doesn't feel like its going to make it... I can mash the throttle and feel the line change and make the corner.

If I white knuckle and don't mash the throttle I usually drive off track
but the TB diff will slightly turn the car if you trust it and floor it right at the moment you don't think you will make the corner...

my old locked diff did the same thing but 4times more.
the only way around the corner with a locked diff was to
- kick the rear end out and then rotate the car..
- mash the throttle when the front end was pointing the direction you wanted to go in the rotation sequence.
- and go straight in the direction it was pointing

the big advantage to the locked diff was:
1) over cooking the braking zones in every single corner and making it due to the fact you were sliding sideways through the braking zone and cutting speed due to the slide.
2) being slightly faster due to the constant slide and practicing this style of loosing the car-catching the car... loosing the car-catching the car, in every single corner. The style taught you better reaction and better skilll at catching it. but it also made it a lot easier to mess up since you had to catch it 10-15 times per a lap.

The big advantage to the TB diff is
- the abilility to drive off line in the marbles or on wet or imperfect surfaces.
- the TB diff is a lot smoother. Just as good at full throttle-out and only gives up anything under braking. But MUCH better tire life and MUCH easier to drive due
to the technique differences.
- more forgiving of driver error, easier on the equiptment, and easier to maintain concentration...
- easier to be in traffic, since loosing controll side by side at 80mph is such a fine line when your 2 foot away from the other guys door.

if there was a driver error with the locked diff it was less forgiving
you would loose 5 car lengths to the next guy if he shut the door or you misjudged anything. I think it was faster on open laps, but you could never let up and never loose your momentum.


Dang, this is pure gold. Thank you for sharing your experiences.
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Posts in this topic
yeahmag   Corner Balance   Feb 18 2014, 04:44 PM
Woody   I'm getting very close to aligning and corner...   Feb 18 2014, 06:50 PM
brant   Woody you need to take those numbers and use the c...   Feb 18 2014, 07:56 PM
Woody   What do you mean ideal balance?   Feb 18 2014, 08:51 PM
brant   there is a formula to calculate Ideal balance usin...   Feb 19 2014, 08:14 AM
Randal   there is a formula to calculate Ideal balance usi...   Feb 27 2014, 07:05 PM
Seabird   Having a cross weight of 50.04% (second pic) is da...   Feb 19 2014, 10:49 AM
Woody   Having a cross weight of 50.04% (second pic) is d...   Feb 19 2014, 12:04 PM
stimpyvan   Hi everybody. We are getting ready to start build...   Feb 27 2014, 04:46 PM
Woody   50/50 would be optimal on any car. 45/55 is where ...   Feb 27 2014, 05:18 PM
stimpyvan   50/50 would be optimal on any car. 45/55 is where...   Feb 27 2014, 06:44 PM
stimpyvan   Just out of curiosity, why not 50/50? Is everybody...   Feb 27 2014, 09:45 PM
J P Stein   Just out of curiosity, why not 50/50? Is everybod...   Feb 28 2014, 07:29 AM
stimpyvan   [quote name='stimpyvan' post='2004118' date='Feb ...   Feb 28 2014, 09:15 AM
J P Stein   We had to add about 80 Lbs of ballast to our RX7 ...   Mar 1 2014, 03:38 AM
stimpyvan   I don't know if you would call it a design fl...   Mar 1 2014, 07:42 AM
Randal   We had to add about 80 Lbs of ballast to our RX7...   Mar 1 2014, 11:18 AM
Woody   [quote name='J P Stein' post='2004553' date='Mar ...   Mar 1 2014, 12:38 PM
Randal   [quote name='J P Stein' post='2004553' date='Mar...   Mar 1 2014, 02:14 PM
Woody   Just out of curiosity, why not 50/50? Is everybod...   Feb 28 2014, 07:37 AM
J P Stein   Sorry, TB is Torque Biasing. na LSD with an extea ...   Mar 1 2014, 08:15 AM
Woody   Its next on the list after the new engine is compl...   Mar 1 2014, 02:40 PM
brant   I can still feel my TB Diff... If I go into a high...   Mar 1 2014, 06:20 PM
toadman   I can still feel my TB Diff... If I go into a hig...   Mar 1 2014, 07:16 PM
Randal   Interesting comments: I've never had my c...   Mar 2 2014, 11:39 AM
Woody   Nice post Brant. Very informative. I was never int...   Mar 1 2014, 07:05 PM
yeahmag   Finally finished my (race) alignment and corner ba...   Mar 11 2014, 10:22 AM


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