I tried to explain this in another thread.

You need to maintain boost. Boost drops off under 3K. So when you shift normally, the RPMs drop below 3K and the turbo has to spool up again. Now.. keeping your foot down, maintains boost (to an extent being the stock ecu limits over 6K) and results in a fun ride.

I tired it once... It was VERY hard to do. I had to mentally, in my mind, keep my foot on the floor. It does work and it keeps the car in a constant surge...

I've since then tried to find a good inbetween. I lift, but very little... maybe a half inch if that. This way, I maintain boost, but not the redline....

 

So your saying you have to try to keep the RPMs above 3k and keep your RIGHT foot slammed to the floor as your working the clutch and the shifter? I'm thinking about my shifting habits and trying to imagine myself keeping my right foot on the gas as I'm working the clutch and the shifter...it's proving to be quite a difficult task, haha. But is that what you're saying?

 

its extremely easy to do, I've done it numerous times on this car.

floor it and don't ever lift off the gas. When you need to shift to slam the clutch and the gear as fast as you can. The car will more than likely spin tires in 2nd but should only chirp a bit in third and you won't have that annoying boost lag that you get between shifts.

 

^^^Right. That what the Mazda guys were getting at in the article...

But what I'm saying is.... during shifting, you just have to keep your RPMs above 3K.

So hold your foot on the gas enough to maintain 3K's and shift. Holding it to the floor makes me nervous...

 

DUPE

 

don't worry, hold it to the floor sometime

trust me, nothing bad will happen

 

Alright. I think I get what you guys are getting at. Just seems like a lot of practice. I took it to the track on Friday, my times were 15.6 on first run and 15.2 on second run, beat both guys. Those were 1/4 mile times btw. I bogged down a bit on the first run and spun first on the second. I'm gonna take it again in a week or two I'll try to a little bit better. My friend is taking his 520awhp STi just for fun so it'll be a good time.

 

Just to stating the obvious but Just cause the mazda engineers said it could handle it doesnt mean that its good for a car you want to drive for a couple years or more.

They are merely trying to get the best scores possible a magazine mule that will likely be auctioned off for parts at the end of its run or whatever it is they do with these often abused vehicles.

 

[quote author=solipsism link=topic=78047.msg1424845#msg1424845 date=1179677902]
Just to stating the obvious but Just cause the mazda engineers said it could handle it doesnt mean that its good for a car you want to drive for a couple years or more.

They are merely trying to get the best scores possible a magazine mule that will likely be auctioned off for parts at the end of its run or whatever it is they do with these often abused vehicles.
[/quote]

I don't plan on doing this every second I drive my car though. I still prefer my conventional speed shifting. The only car I really felt comfortable shifting a little bit harder on was the STi b/c the tranny was basically bulletproof, not invincible, but a lot stronger than many of its competitors.

 

if your comfortable with the tranny and quick with clutch work then it should only come down to mental focus. It is tricky cause your almost always lifting off the gas in between shifts. When you do try, theres almost like a mental barrier when you attempt it. But it gets easier as you practice... Just remember you got be quick at the clutch work.....
.....try clutch-less shifting, now thats tricky to do. Some people can do it like its nothing, I can never get that.

 

I can clutchless shift and the MS3 does it fairly well, but definetly not at speed yet....



I keep it floored and run it up to the limiter and when the engine noses over from the limiter, I slam home another gear!!!!

Not really, but I want to try it...

 

[quote author=BLACKMS3 link=topic=78047.msg1424909#msg1424909 date=1179680716]
I can clutchless shift and the MS3 does it fairly well, but definetly not at speed yet....



I keep it floored and run it up to the limiter and when the engine noses over from the limiter, I slam home another gear!!!!

Not really, but I want to try it...
[/quote]

Clutchless shifting?? That just sounds like A LOT of strain on the car. I accidentally did that but I popped out of gear. I was barging down a straightaway at 145 in my STi in 6th and popped the car into nuetral w/o engaging the clutch, scared the crap out of myself.

 

Try it out... start in 3rd (for ease), then let off the gas like you normally would and at the same time apply pressure downward until it engages in 4th.. done.

It's all about finding the sweet spot between the engine and the rest of the drivetrain.

 

I can clutchless shift up and down. If you hit it right it is like the car wants to go in to that gear. It is no strain on the car at all and is easy to do.

 

[quote author=BLACKMS3 link=topic=78047.msg1425108#msg1425108 date=1179692234]
Try it out... start in 3rd (for ease), then let off the gas like you normally would and at the same time apply pressure downward until it engages in 4th.. done.

It's all about finding the sweet spot between the engine and the rest of the drivetrain.
[/quote]It's at like 1200rpms though.

It's also not meant to be done on modern transmissions.

 

car and driver said never shift without the clutch. causes premature syncro wear and eventually you will grind gears with the clutch or not. unless its absolutly perfect.

 

Well if C&D said it, it must be true!!!!

I believe them though...

 

If you do want to practice without your clutch try going downhill.

 

[quote author=BLACKMS3 link=topic=78047.msg1425386#msg1425386 date=1179701958]
Well if C&D said it, it must be true!!!!

I believe them though...
[/quote]

me too, i used to do it all the time but now i figure i have been warned.

 

never shift without the clutch.. :shock: They make race transmissions for this that cost more than our cars do.

A clean power shift is more about speed than anything else. Clutch and shift fast. But the faster you shift the less time the synchro's have to catch up and they can wear faster.

Also, rpm has nothing to do with lag as far as shifting is concerned. Keeping the throttle plate open keeps the compressor loaded.

Now, I just need a motor mount so I can actually drive this car...


Here's a little more info for the newbs... just before your clutch foot hits the floor "slip" your foot off the pedal to the footrest and let it "pop" back up.. Hence the terms "slipping the clutch" and "popping the clutch"...

 

[quote author=Slapnutzz link=topic=78047.msg1426309#msg1426309 date=1179727541]
Now, I just need a motor mount so I can actually drive this car...


[/quote]

You just nailed it!!

A stiffer motor mount makes a world of difference, keeps the driveline IN-LINE !

 

[quote author=Slapnutzz link=topic=78047.msg1426309#msg1426309 date=1179727541]
just before your clutch foot hits the floor "slip" your foot off the pedal to the footrest and let it "pop" back up.. Hence the terms "slipping the clutch"
[/quote]

Nice try, but no. Slipping the clutch is when you allow it to slip against the flywheel; thus allowing the RPMs to be higher than they would be if you had complete engagement of the clutch.

 

^^^ RIGHT.. Slipping allows you to control power to the ground and RPM's in relation to that.

 

I almost never use the clutch when pulling the car out of gear and rolling to stop. As long as there is no strain on the trans. Might extend life of the slave cylinder and other clutch related parts. Brakes are much cheaper than a clutch also.

 

[quote author=Slapnutzz link=topic=78047.msg1426309#msg1426309 date=1179727541]
Here's a little more info for the newbs... just before your clutch foot hits the floor "slip" your foot off the pedal to the footrest and let it "pop" back up.. Hence the terms "slipping the clutch" and "popping the clutch"... [/quote]

Now that just sounds like you're dumping the clutch which I know for a fact is really bad...or maybe it's not dumping and I'm just crazy...but I'm pretty sure that's considered dumping...haha.