SoFloTC

iTrader: (3)

arite so im just curious whats the best way to race an turbo auto from a dig or from some rolls?

how bad is it to downshift to lets say 1st for a 20 roll so the rpms are near like 3K when u go?

whats the best tactics for racing the auto?

nebster

its called doing it on a track

BrownDogg

From a dig.... Hold the brake and hit the gas and rev as high as the car will go without moving forward. Let go of the brake and put the pedal to the floor. Do that in 3 or 2. No need to do it in L as its not any faster

By doing the brake torque thing I just desrcibed, the car starts to build boost so when you let go of the brake, you have instant boost

SoFloTC

iTrader: (3)

what about from a roll brown?

Syldrin

iTrader: (1)

it's be the same. brake boost untill you're ready to launch it.

TurboToyotas

If its a stock tranny.......YOU DONT

not unless you want a good reason to replace it

Upgrade the tranny and you can do whatever you want.

An auto built right has way more potential than a 5 speed when it comes to drag racing.

Regards-

TOdd

SoFloTC

iTrader: (3)

we dont what? brake boost from a dig? or what?

whats the best way to race from a dig and roll then todd?

Syldrin

iTrader: (1)

I think what Todd is talking about is the valve body isn't exactly strong in the autos.

And when it comes to more potential then a 5 speed it's because a human can't shift faster then an auto..

Put it in a lower gear then floor it.

andino

^^ Just step on the petal if you have a stock auto tranny

Syldrin

iTrader: (1)

Actually i don't know if you'd even want to shift it like a manual now that i think about it with putting that much power down.

fishbone

+1, if it's an auto with no sport-tronic, I guess you'll have to live with it. Manually changing the lever from positions is not only useless, but potentially slower because you have to shift it at JUST the right amount of time AND count for the shift lag to not hit the rev limiter and do more harm then good. It's an auto for a reason, just punch it and go. From a dig, you can take chances with torque braking but I would never follow the advice above to "just rev it as high as it goes". I could probably rev it all the way up to 4 or 5K and blow the torque converter.
If you're serious about it, get a shift kit, a high-stall torque converter, a transmission cooler or all of the above. Otherwise, just drive it normally.

senseiturtle

Try this. Notice we're at the track.

Stage shallow, only pulling forward enough to break the first laser. Come to a complete stop.

Car in N.

Rev the motor while depressing the brake. You'll feel the brake pedal sink in, farther than it would without rev'ing. This is because you're increasing the pressure in the brake lines with the engine reving.

Stop reving when your brake pedal sinks as far as it's going to go. HOLD the brake pedal down.

While NOT REVING... put the car in drive. Now, press on the gas slightly, which will make the car want to move forward against the braking power. Give it just enough juice to reach about 1800-2000 rpm.

(If you're in a turbo, you might be building a little boost already with this. Unsure.)

Leave it in DRIVE for the race. Do not shift yourself. An automatic is generally slower than a manual in low-power cars due to more driveline losses (more friction), NOT because "you can shift faster." By trying to manually control the shifting, all you're doing is introducing more driver error.

When you see the 3rd yellow, release the brake and mash the gas. Hopefully you'll launch at a point where you won't bog down, nor spin. Adjust launch point until you find the sweet spot for your car, your suspension, and your tires.

.

Never Neutral-drop. BTW. That's asking for it.

healthynine

never neutral-drop....very very true...

but especially with a turbo, it won't build boost in neutral anyway, the only way is to brake boost

HotBox420

Where could I get a shift kit for my xb, the lag on shifting would be nicer if it was shortened... cant seem to find one.

fishbone

Unfortunately I am not the most qualified person here to answer that question. Anybody else?


Later edit: I forgot about Level 10
Be warned that you're looking at a lot of dough ;)
http://www.levelten.com/products.htm
They have a lot of stuff: shift kits, reinforced/racing/high-stall torque converters, clutch kits, etc.
Just take note that to locate Scion-specific products, on the selector on the top, go to Imports and it is actually under the Toyota brand, keep scrolling in the sub-menu and you'll find the tC, xA and xB

AcidDrop

iTrader: (4)

fishbone and browndogg are correct about how to race your auto from a dig, as from a roll you should already be in boost while the car is in drive since it stays in boost the whole time. "downshifting" as most people call it is just adding more stress on your motor and tranny without making you even go faster. you do feel that you go faster but really when it comes down to the shift point it's way to slow that you end up loosing time.

HotBox420