06-16-2014, 04:13 PM
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#1
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,433
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Do you downshift when you slow down or stop?
Dad always taught me to do this.
Is it harder on the car / clutch than you need to be?
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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06-16-2014, 04:21 PM
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#2
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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My opinion:
The only reason to downshift is to be ready for the next time you need to accelerate. Downshifting through each gear when coming to a stop is a waste of clutch material. But it is fun....
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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06-16-2014, 04:30 PM
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#3
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,793
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I look at it this way
Brakes are a lot less $$ to replace than a clutch, as well as easier to do, especially DIY
__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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06-16-2014, 04:43 PM
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#4
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Registered User
Join Date: Apr 2014
Location: Chicago
Posts: 329
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Quote:
Originally Posted by JayG
I look at it this way
Brakes are a lot less $$ to replace than a clutch, as well as easier to do, especially DIY
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Exactly what I was going to say.
__________________
'99 Porsche Boxster 986 - weekend car
'04 BMW 645ci e63 - daily driver
'98 BMW 528i e39 - dog carrier
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06-16-2014, 05:49 PM
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#5
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,793
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Quote:
Originally Posted by all_mota
Exactly what I was going to say.
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you snooze, you lose
:dance:
__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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06-16-2014, 05:55 PM
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#6
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Beginner
Join Date: Mar 2013
Location: Houston
Posts: 1,659
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Not with the Boxster. With the Mustang GT it was fun because it made a heck of a noise. Juvenile, but fun.
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2003 S manual
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06-16-2014, 06:02 PM
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#7
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Registered User
Join Date: Oct 2012
Location: Cincinnati, Ohio
Posts: 373
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Quote:
Originally Posted by JayG
I look at it this way
Brakes are a lot less $$ to replace than a clutch, as well as easier to do, especially DIY
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I agree!
Van914
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06-16-2014, 07:15 PM
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#8
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Registered User
Join Date: Dec 2012
Location: Jackson Hole, Wyoming
Posts: 800
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Quote:
Originally Posted by Timco
Dad always taught me to do this.
Is it harder on the car / clutch than you need to be?
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Only downshift to control your speed on long downhills. Brakes are for stopping, gears are for accelerating. Dad always taught me that.
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06-16-2014, 07:42 PM
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#9
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Registered User
Join Date: May 2011
Location: Miami florida
Posts: 1,591
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Using the clutch to slow the car a sign of someone who doesn't know how to drive.
Downshifting is used make sure you are in the right rpm range for the gear you are in. Never use a downshift to slow the car.
Race car drivers never use a downshift to slow the car. When approaching a second gear corner, for example, a racer will never use a downshift to slow the car. He will brake hard and at the same time downshift and rev match so the clutch is never used to slow the car.
__________________
Current car
2000 Boxster 2.7l red/black
Previous cars
1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
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06-16-2014, 08:00 PM
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#10
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,433
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Quote:
Originally Posted by san rensho
Using the clutch to slow the car a sign of someone who doesn't know how to drive.
Downshifting is used make sure you are in the right rpm range for the gear you are in. Never use a downshift to slow the car.
Race car drivers never use a downshift to slow the car. When approaching a second gear corner, for example, a racer will never use a downshift to slow the car. He will brake hard and at the same time downshift and rev match so the clutch is never used to slow the car.
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Glad I asked! Dad taught me to do this in a '78 Pinto Wagon.....
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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06-16-2014, 08:13 PM
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#11
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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I am very easy on my car on road & highway. I only brake when I need to. I lift to slow down. I rarely down shift unless its a tight turn where a blip is in order. I use the e-brake at traffic lights. I short shift until the needles are pointing 12 oclock. I get on the throttle gradually, never jabbing. I round my tuns to open out the curve, maybe it saves some rubber over constantly cutting sharp turns.
I've gotten in the habit of cranking up the AC if I hit traffic snd find myself idling for long stints. I check tire pressures every other gas fill up to ease up on suspension.
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GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
Fabspeed Headers & Noise Maker
BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
Last edited by Perfectlap; 06-16-2014 at 08:19 PM.
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06-17-2014, 03:56 AM
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#12
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Registered User
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,239
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I go to neutral when approaching a stop and coast until I know what gear I'll be going into. I have gotten into down shifting through each gear on situations like off ramps where you go from 6th down to 3rd or 2nd and I know I will be continuing in a lower gear
But as everyone before me said, cheaper and easier to replace brake pads
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2002 S - old school third pedal
Seal Grey
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06-17-2014, 04:48 AM
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#13
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Gone
Join Date: Feb 2014
Location: NV
Posts: 249
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Quote:
Originally Posted by kk2002s
But as everyone before me said, cheaper and easier to replace brake pads
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You WIN! This is the correct answer.
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06-17-2014, 07:28 AM
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#14
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Rookie
Join Date: May 2014
Location: Portland Oregon
Posts: 215
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Interesting thread. What does everyone use for right turns in motion? Ive been using 2nd, as its easier to rev match than 1st, but it always seems to leave me a little low in RPM. Sometimes as low as 1500 when the corner is complete, is this bad?
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02 Seal Grey 5 Speed
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06-17-2014, 08:11 AM
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#15
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Registered User
Join Date: Apr 2012
Location: Ontario, Canada
Posts: 598
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I always double-clutch downshifts into a corner - if you match the revs correctly, it puts little wear and tear on the clutch and even less on the transmission. It should add no additional wear and tear on the brakes because, as has already been pointed out, you are heel and toeing and are not using compression braking (the whole point of double-clutching is to equalize revs so that there IS no compression braking and there is less strain on the clutch/transmission than releasing the clutch with mis-matched revs). The fact is that a properly executed, rev-matched downshift put less not more wear and tear on the clutch, cv joints, engine/transmission mounts than any downshift without rev matching.
I do not down-shift into first gear for corners - it is much harder to match revs and, frankly, even at 1500 RPM's in second, the engine is still pulling quite strongly (peak torque on the 2.7 occurs at relatively low RPM's).
Rolling to stop in neutral? I have always believed that while moving, the car should always be in gear in case you need to take an evasive maneuver (such as moving forward a bit to avoid contact from a late braking, or sliding car from behind - believe me, I know from experience).
Is downshifting prior to a corner and double-clutching necessary? Of course not, but all racing drivers do it with manual transmissions as it enables you to be in the correct gear in order to apply power in the middle of a turn and on exit. When you enter the turn your downshifting is done and you can concentrate totally on steering and trailing throttle braking, if you so choose. Plus it sounds great and let's face it, that is one of the true joys of owning a Boxster!
Brad
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06-17-2014, 10:18 AM
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#16
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Registered User
Join Date: Apr 2008
Location: Southern New jersey
Posts: 1,054
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I heel/toe for corners, generally not when stopping. I bought the car to have fun, and that's the way I drive it !
I virtually never downshift to 1st for a turn. It would have to be a slow turn, and it can be a bit abusive IMO.
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06-17-2014, 10:40 AM
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#17
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WALDMEISTER
Join Date: Sep 2013
Location: Germany
Posts: 1,337
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Gear shifting is too much fun not to do it.
I sometimes double-clutch when downshifting...just for the classic engine rev up sound.
double-clutch sound = +1 smile
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Original Owner | PORSCHE Boxster 2.7L (MY01) | Seal Gray
Last edited by BRAN; 06-18-2014 at 02:26 AM.
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06-17-2014, 12:47 PM
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#18
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Registered User
Join Date: Jun 2012
Location: Little Switzerland, north carolina
Posts: 551
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of course it puts more wear on your clutch, but why do we drive these cars if not for the fun, and downshifting is fun. If we were going for economy we would drive kias.
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06-17-2014, 01:15 PM
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#19
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Registered User
Join Date: Apr 2008
Location: Torrance, California
Posts: 132
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I don't downshift to slow in a Boxster, but there are cars where this is almost necessary.
I've driven a 914 with drum brakes that didn't feel safe without downshifting. On anything light with old brake systems it can be helpful.
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1962 VW Beetle
1966 Triumph Spitfire
2003 Porsche Boxster S
2005 Ford F-150 Monster Truck
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06-17-2014, 01:56 PM
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#20
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Registered User
Join Date: Jan 2014
Location: Albuquerque, NM, USA
Posts: 730
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Not a bad idea to use a lower gear to maintain desired speed downhill in mountains.
Brakes are NOT for prolonged use.
Also no need for true double clutching with modern transmissions. What you're likely doing is sometimes called half double clutching and is simply rev matching prior to engaging clutch, which should always be done. True double clutching is moving gearshift to neutral and then engaging clutch and speeding up motor to get trans gears up to speed prior to then declutching and moving the gear lever to the lower gear. Synchromesh accomplishes this for you.
PS: I checked page 31 of my copy of the April, 1970, issue of Road & Track (first 914 test) ... the 914 is a 4- wheel disc brake car.
__________________
Kent Christensen
Albuquerque
2001 Boxster
2007 GL320 CDI, 2010 CL550
2 BMW motorcycles
Last edited by lkchris; 06-17-2014 at 02:16 PM.
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