At the limit of cornering, I can't see how you would want to shift mid-corner.

 

I often have to shift mid corner when taking off in 1st from a stop as first gear hits the rev limiter mid corner. I could short shift but would not be accelerating as fast. I could also bounce off the rev limiter which would cause me loss of speed. Another option would be to maintain speed and not bounce off the rev limiter but also not gain speed through the corner.

I often do my shift with little to know throttle lift as well and my car always goes in like butter. I have taped it and cannot hear my shift in the video. Basically I shift like I do when drag racing although let out the clutch slightly slower or the car likes to jump about a foot sideways. That can also be fun though as long as there is enough corner area.

 

I think that as people are thinking about this they are thinking traditional corner.. 90' something short, come in, brake, downshift, turn, stand on the throttle, unwind etc..

But.. one person mentioned long increasing radius, which is one type, decreasing radus wouldn't but a constant radius corner would.. Some corners that I can think of that are out there..

Turn 8 Roebling Road Savannah, GA.. you come into it flat, stay flat through it, and in many cars have to upshift in the corner, otherwise you just have to ride the rev limiter for 500 feet. The 5 speed Stock Evo is lucky in this corner, because you enter it at 90, exit at 104-107 and its 4th gear all the way. throw in R compounds and some basic mods though, and all the sudden you need an upshift in the corner. To me a smooth upshift is better than the sudden loss of acceleration that disrupts or can disrupt the car when it catches the limiter.

Turn 2 Roebling Road. Entry Speed 70, exit speed 85.. lots of cars run out of 3rd gear in this corner, and it requires some type of shift mid corner much of the time.

VIR, any shift (up or down) while driving roller coaster is a shift while cornering.. Also coming onto the main straight (long or north course) is a long increasing radius corner that will require shifting.

Watkins Glen, esses.. chances are at some point you are going to have to upshift in this set of corners..

Any long corner that you accelerate through is a potential for an upshift while cornering that depends on the gearing of the car..

Mov, I think whats catching you is "at the limit of cornering" in many of the long corners you are not at the limit, take Roebling turn 8 that i mentioned.. the "limit" might be 100, but because of the straightaway size behind it, you dont have the chance to reach that limit.. so you are shifting at redline, but below the tires limit of the car because of the size of the corner. Though I stand by the fact that sometimes you just get to the time to shift and you do it, with proper attention and seat time to back up what minor upsetting of the car might take place.

Any word on the origional issue with the driver/car that was having trouble?

Jon K
www.seat-time.com
www.racerjon.com

 

I'm sorry about not keeping up with the thread. I can not determine if there is a lot of movement from my motormounts. The more I think about it in daily driving(I have not been to an event lately), is I may not be rev matching as well as needed. If I let the revs drop to far from second to third I will have a catch in the shift. If I rev match it is smooth. My next autox is in Dec.

Thanks again

Tom

 

There are plenty of places that you have to shift when in mid corner. To name a few....

Road Atlanta:The Esses
Barber, hell you're always turning there, I am shifting in 2, 3, 4, coming out of the hairpin, in the corkscrew, and in the last few turns as well
Sebring: coming out of T5 you are mid corner and have to upshift, upshift in 9, upshift in the long left sweeper before 15.

So there are many places where you have to shift mid corner.

 

Will a bad syncro cause the lock out?

 

Butonwillow turn 2 (increasing radius turn) and also after the bus stop (long sweeping right after a harsh kink of a left).
Willow Springs dog leg (ok so that's almost not a turn)
Streets of Willow bowl, you can stand on the throttle and go through probably 4th gear before that banked mother is over!

These people who say never shift mid corner must not drive road courses. Now as for autocross, I would imagine you'd only need this in an increasing radius corner or a sweeper that comes shortly after a sharp corner (essentially making it like one big increasing radius). But I've never seen a high performance car have trouble shifting in a sweeper. Something is wrong.

 

Thanks, the more I think about it, in daily driving 2nd to 3rd is not smooth sometimes it catches sometimes not. I'm going to have Mitsu look at the problem, without going into details.Tom

 

FWIW I find shifting from 2nd to 3rd under heavy cornering hard.

Did NOT have this problem with the STi's 6-speed.

I think Mitsubishi's cable linkage has something to do with it??

 

don't mean to bump this thread, but are you really running the shift patterns it seems?

sebring, down to 55 mph in t5, 2nd doesn't make a whiff of sense there, i'm only down into 2nd, once if i remember right, and thats the safetypin. (125 down to 35). turn 9 really isn't even a corner, it's flat out.

Not sure what i did in turn 3, as i just ran the short course about a month ago, and the full course has kinda slipped my mind.

Something many people don't consider, is just staying in the higher gear, the time shifting, and re-spooling, takes away from the total time. Example: Turn 17 at sebring is a big u-turn. i'd down shift to 3rd and get real high on the revs, gun it out, and top out 4th at the end of the stretch. (first time out there). Instructor had me keep it in 4th, and at the end of the stretch, i was grabbing 5th about the start finish line, i gained 12-15 mph down the stretch, by picking the higher gear. As with 10-11-12 at sebring, I was taught to short shift 3rd right after 10, before 11, then grab 4, (basically using the short space in between the turns to shift and get the car re-settled) and i'm topping it out by 12, whereas staying in 3rd, it really wasn't worth grabbing 4th even.

besides, it's much easier on the car