Shifting Question For you guys??
05-09-02 | 10:16 PM
#26
...
Joined: Mar 2001
Posts: 171
Likes: 0
From: Twin Cities, MN
SHEESH! You really need to learn to use the search
here's my OLD thread on this subject
https://www.rx7club.com/forum/showth...ighlight=shift
here's my OLD thread on this subject
https://www.rx7club.com/forum/showth...ighlight=shift
05-10-02 | 05:13 AM
#28
Lives on the Forum
Joined: Feb 2001
Posts: 26,664
Likes: 19
From: n
Originally posted by nitroracer
when i power shift i revout to 7 then push in the clutch and let it go to 8 then so why do u think u are gunna riun ur tranny someone please explain...i was think it was bad for my tranny cuz i dont let it go passed 8500...
when i power shift i revout to 7 then push in the clutch and let it go to 8 then so why do u think u are gunna riun ur tranny someone please explain...i was think it was bad for my tranny cuz i dont let it go passed 8500...
Before synchromesh transmission were invented, people drove without synchros.  They required rev matching and double-clutching which would match the upshift gear speed and RPM's for a smooth shift.  You try powershifting one of these non-synchro gearboxes, and it'll award you with a nice gear crunch.
Synchronizers were invented to eliminate the rev matching.  What it does is slowly engage the gear by (most common) sliding cones.  These things are usually made of bronze and do wear out.  You try to overpower these things, and they can explode into a bazillion pieces.
By powershifting (not lifting the gas), you're doing two things - you're putting serious stress on these synchronizers, and you're putting serious stress on the clutch disc.  "think about it" - the RPMs to gear change speed is totally WRONG - what has to give for the transmission to slip?  Either the synchro or the clutch disc...
The transmission are not designed to be "powershifted" - you're putting undue stress on them by "powershifting".
-Ted
05-10-02 | 11:25 AM
#29
Ho's and Cadillac Doors
Joined: Apr 2002
Posts: 2,703
Likes: 1
From: ATL, GA
isnt powershifting a shitty way of double clutching? I was always told that double clutching is a faster way to shift, and ive done it a million times but it seems slow as *****. Whenever ive done it, i push in the clutch, put it in neutral, let the clutch out, rev the engine to match speeds, and then throw it into gear. It has always worked smoothly for me like that. But I thought that was actually a better way to shift if you knew how to do it right?
05-10-02 | 11:49 AM
#31
Lives on the Forum
Joined: Feb 2001
Posts: 26,664
Likes: 19
From: n
Originally posted by 2ndGen.rocket
isnt powershifting a shitty way of double clutching?
isnt powershifting a shitty way of double clutching?
Double clutching was required of non-synchro transmission for smoother shifting; this also save wear&tear on synchonizers, if you want to try it.  Power shifting is totally opposite of that...
-Ted
05-10-02 | 12:48 PM
#32
Ho's and Cadillac Doors
Joined: Apr 2002
Posts: 2,703
Likes: 1
From: ATL, GA
ok i see now. yeah that is kind of gay. I always wondered because whenever i double clutched , i would never need to use the clutch the second time to go into gear. And it was always a very very smooth shift, like it was an automatic transimission almost
05-20-02 | 12:51 AM
#35
Full Member
Joined: Mar 2002
Posts: 174
Likes: 0
From: 415 -> 707
Re: Re: Power shift
Originally posted by RETed
There is no such thing as doing it "right" - when upshifting, the rev match to previous gear is always going to be lower on the RPM scale.  Explain to me how do you rev-match the engine with the transmission if you don't lift on the gas pedal???  Last time I checked, leaving your foot on the gas pedal and popping the clutch will cause the engine revs to INCREASE, not decrease.  So explain to me how having the engine revs always INCREASING in this sitaution be able to rev match for the upshift if you need to DECREASE the revs.
Please people, "power shifting" is hard on the transmission and the synchros.  It's an idiotic thing to do to a modern synchromesh transmission just to win a race.  This causes unnecessary wear and tear on your drivetrain just because you want to win a race.  Don't be complaining you blew up your transmission messing around with power shifting.  If you happen to misshift trying to do this, you're going to almost guarantee kill the synchro in the next gear or even take out the gear itself.
If you wanna be like TheBigOne and nitroracer and take the chance on ruining your transmission, go right ahead; I can only give you my opinion on why this is not recommended.  Just be aware of the consequences - remembers, there is nothing free about performance and going faster.
-Ted
There is no such thing as doing it "right" - when upshifting, the rev match to previous gear is always going to be lower on the RPM scale.  Explain to me how do you rev-match the engine with the transmission if you don't lift on the gas pedal???  Last time I checked, leaving your foot on the gas pedal and popping the clutch will cause the engine revs to INCREASE, not decrease.  So explain to me how having the engine revs always INCREASING in this sitaution be able to rev match for the upshift if you need to DECREASE the revs.
Please people, "power shifting" is hard on the transmission and the synchros.  It's an idiotic thing to do to a modern synchromesh transmission just to win a race.  This causes unnecessary wear and tear on your drivetrain just because you want to win a race.  Don't be complaining you blew up your transmission messing around with power shifting.  If you happen to misshift trying to do this, you're going to almost guarantee kill the synchro in the next gear or even take out the gear itself.
If you wanna be like TheBigOne and nitroracer and take the chance on ruining your transmission, go right ahead; I can only give you my opinion on why this is not recommended.  Just be aware of the consequences - remembers, there is nothing free about performance and going faster.
-Ted
yeah i agree it is bad for your tranny.
BUT FOR THE SAKE OF DISCUSSIN I WAS MERELY IMPLYING EXACTLY WHAT I SAID.
I dont do it and I dont recommened any one else to do it.
05-20-02 | 01:05 AM
#36
Just Looking Around
Joined: Jan 2002
Posts: 1,830
Likes: 0
From: Fort Benning, Ga./ Anna, Tx.
Somehow my sisters boyfriends in his 2001 couger blew a hole in is tranmission doing this. Luckly he is still under war. so they fixed it for like 50 bucks. But he doesn't do that anymore. I've had like 5 friends having to rebuild their trans b/c or "powershifting". Everything from rustangs to a del slow.
kleach
kleach
05-20-02 | 01:14 AM
#37
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
Likes: 8
From: Auckland, New Zealand
If you really want to “powershift”, you need one of these:
T-Sport Flat Shift
This one’s not available yet, but there are others out there.
T-Sport Flat Shift
This one’s not available yet, but there are others out there.
05-20-02 | 08:10 AM
#39
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
Likes: 8
From: Auckland, New Zealand
Re: power in high rpm
Originally posted by turbozetusa
This works great for boosting output above 5000k
This works great for boosting output above 5000k
05-20-02 | 01:26 PM
#40
Senior Member
Joined: Jul 2001
Posts: 366
Likes: 3
From: North Reading, MA
Re: power in high rpm
Originally posted by turbozetusa
This works great for boosting output above 5000k: http://cgi.ebay.com/ebaymotors/ws/eB...ADME:B:LC:MT:1
You may also need to investigate to make sure that your 6 port is opening up fully.
This works great for boosting output above 5000k: http://cgi.ebay.com/ebaymotors/ws/eB...ADME:B:LC:MT:1
You may also need to investigate to make sure that your 6 port is opening up fully.
