This car is quick off the line...
This car is quick off the line...
Okay so today I was experimenting with my '09 RA and I was reading up on the X's launch control. I figured I'd give it a try so I took the ASC off and I put it in Sport mode. I floored the gas and brake. Then the revs went up and up and then all of the sudden it started to rev up near the 6-7K's and the car said like "Slow Down" or something of that sort. Then I tried again except this time when the revs hit like 3K I let go of the brake and VROOM off I went, my head back in the seat, it was awesome. Could anyone explain to me what happened the first time I tried and it over-reved and said "Slow Down"? Also is there a "perfect" way to do this type of launch, like is there a certain RPM I should let the brake go at?
Yeah you'll get that slow down warning whenever the car thinks you're beating the living crap out of it; it's cool though; last time it happened to me it went into a total limp mode for like 3 seconds lol
Just don't power-brake too much too often, like hibby said it's just not good for the tranny; If the Ralliart didn't come with some sort of launch control is for a reason; mitsu wants to keep as many good trannys as possible; that SST is one expensive piece of equipment.
Just don't power-brake too much too often, like hibby said it's just not good for the tranny; If the Ralliart didn't come with some sort of launch control is for a reason; mitsu wants to keep as many good trannys as possible; that SST is one expensive piece of equipment.
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From: PA
So is there like a correct way to do this? Like what is the optimal launch RPM's? Also when you say don't do it too much too often, how often is that? And like when you say it will hurt the transmission, how long will it take before that happens? 10K miles? 30K miles?
Found this in the TSB...
Power Braking (Applying the brake and throttle at the same time) - The gear sets of the TC-SST are like those in a manual transmission, but with hydraulic gear and clutch actuation. It features an automated mode where the gears are shifted automatically under the control of a computer. Power is transferred from the engine through clutches like a manual transmission as opposed to through a torque convertor like an automatic transmission. The clutches in the TC-SST are wet-type and located inside the transmission. When power braking an automatic transmission, the clutches within the transmission are fully engaged and the fluid coupling of the torque convertor allows slippage between the engine and transmission. While this does increase automatic transmission oil temperature, there is no slippage of the clutches themselves. The clutches in the TC-SST function more like a manual transmission clutch. If you power brake, the ECM communicates the increase in engine RPM to the TCM, which begins to apply the clutches. This causes them to slip, leading to elevated transmission oil temperature. If the oil overheats, a warning will appear on the Multi-Information Display (MID). Power braking will shorten the life of the clutches.
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From: PA
I found this is the Technical Service Bulletin. So basically when you Power Brake, there is no clutch slippage, the oil just can overheat is the process is over-done. But at the same time, even though there is no clutch slippage, it will shorten the life of the clutches? How does that work?
Power Braking (Applying the brake and throttle at the same time) - The gear sets of the TC-SST are like those in a manual transmission, but with hydraulic gear and clutch actuation. It features an automated mode where the gears are shifted automatically under the control of a computer. Power is transferred from the engine through clutches like a manual transmission as opposed to through a torque convertor like an automatic transmission. The clutches in the TC-SST are wet-type and located inside the transmission. When power braking an automatic transmission, the clutches within the transmission are fully engaged and the fluid coupling of the torque convertor allows slippage between the engine and transmission. While this does increase automatic transmission oil temperature, there is no slippage of the clutches themselves. The clutches in the TC-SST function more like a manual transmission clutch. If you power brake, the ECM communicates the increase in engine RPM to the TCM, which begins to apply the clutches. This causes them to slip, leading to elevated transmission oil temperature. If the oil overheats, a warning will appear on the Multi-Information Display (MID). Power braking will shorten the life of the clutches.
Last edited by hibby; Jun 5, 2009 at 06:34 AM.
if you want to launch you prob should have just spent another 2500 bucks on a used gsr, drive your car for what it is and dont beat it, its a great car but all cars have their limitations.
just remember it takes $ to play
so if you damage your transmission and mitsu doesnt want to fix it have fun with that.
just remember it takes $ to play
so if you damage your transmission and mitsu doesnt want to fix it have fun with that.
Yes the lesson here is, please don't play around with the SST... also, remember how the RA has a close to a second delay to get up to speed; I'm sure that was Mitsu adding more protection to the tranny so that owners wouldn't mess the damn thing.
brake launch only if your at the 1/4 mile lol..even then dont do it too often or much.
I hit limp mode like 4 times already at the track, just had to let it cool off.
I got my 13.5 @ 97mph..I was happy..So no more brake launching for me for awhile.
I hit limp mode like 4 times already at the track, just had to let it cool off.
I got my 13.5 @ 97mph..I was happy..So no more brake launching for me for awhile.
just wondering
I already have my 225 RE050's and 17 pounds O.Zs waiting for me at TirekRack.com... all I need is $1,800 hahahaha!
back on topic
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Joined: May 2009
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The tranny was leaking after 500 miles, took it back to the dealer and they said, we can fix it. Never the less I get the car back, and 2 days later the tranny was back leaking... So at this point i call Mitsu Motors. They then sent out some tech to the Norco Dealership where I bought the car and determin, they needed to replace the tranny. So they did. I ask the parts guy, how much is that tranny and he said 9k.... But now i have a new problem with my MPG's.. There gone! I only get 254 miles to a tank of gas... wtf