Go Back   986 Forum - for Porsche Boxster Owners and Others > Porsche Boxster & Cayman > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 12-05-2017, 05:57 PM   #21
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,046
Quote:
Originally Posted by mikefocke View Post
OK, it isn't fast enough so lets list what you can do to cure that.

But I'm not sure any of the low priced mods are really that great. Though one that can help on both street and track is lightweight wheels.
Thanks Mike!
__________________
JesseJames
2004 986 S
Wussomatic no more!
NewArt is offline   Reply With Quote
Old 12-06-2017, 07:27 AM   #22
Registered User
 
jsceash's Avatar
 
Join Date: Aug 2009
Location: PA
Posts: 1,248
Garage
This may sound corny but a Xbox ONE with Forza 6 or 7 and a good steering wheel-pedal controller. Don't use the joy stick.
__________________
2003 Boxster 3.6 LN Nickies Black
NHP exhaust, 987 Intake, IPD Plenum, 74 MM Throtle body, L&N Pan Extension, L&N IMS, RSS Underdrive pulley, Recaro Pole Position seats, Accusump, Remote filter, Softronics Flashed ECU, GSR electric power steering pump Kit. GT3 control arm, KSport coil overs
jsceash is offline   Reply With Quote
Old 12-06-2017, 07:48 AM   #23
Registered User
 
jsceash's Avatar
 
Join Date: Aug 2009
Location: PA
Posts: 1,248
Garage
I think if you do some math 125# is equal to a 10hp change in power/weight ratio.
3150/255=12.35 stock

3025/255=11.86 -125#
3150/265=11.88 +10HP

2925/255=11.47 -225#
3150/275=11.45 +20HP
__________________
2003 Boxster 3.6 LN Nickies Black
NHP exhaust, 987 Intake, IPD Plenum, 74 MM Throtle body, L&N Pan Extension, L&N IMS, RSS Underdrive pulley, Recaro Pole Position seats, Accusump, Remote filter, Softronics Flashed ECU, GSR electric power steering pump Kit. GT3 control arm, KSport coil overs
jsceash is offline   Reply With Quote
Old 12-06-2017, 09:05 AM   #24
Registered User
 
achillies's Avatar
 
Join Date: Apr 2016
Location: Tannersville PA
Posts: 395
I have a observation on the Road & Race vids. The stock car makes 260hp but that is at the flywheel. So the number on the RR would be lower (drivetrain loses maybe making 235hp). So if the car now makes 285 on the RR arent the mods worth more like 50 hp? and 285 at the wheels is more than a 3.4 carrera maybe even a 3.6 carrera. Or do I just not have it incorrect.
__________________
2003 Boxster S
Speed Yellow
achillies is offline   Reply With Quote
Old 12-06-2017, 12:52 PM   #25
edc
550 Anniversary
 
edc's Avatar
 
Join Date: Jul 2012
Location: Surrey, UK
Posts: 429
Garage
The Road and Race poster was mainly on boxa.net and gathered a lot of info from users there doing the tried and tested mods. But to answer your question no. You won't get +50bhp whether at the wheels or at the flywheel with those mods. I did them all and put the car on the same dyno at each stage and posted the graph with each mod stage over layed including a baseline run. You'll note the Road and Race vids "layer" up the mods and power on an assumed 260bhp start point. I have seen standard cars run anything up to 35bhp different to each other depending on their maintenance.
__________________
Current: 550 Spyder Anniversary- Carnewal exhaust - 100 cell cats - stainless manifolds - 4" underdrive pulley - poly gearbox mounts - rear lower alu brace - adjustable rear toe links
Sold: 986S - Zenith Blue - 18" Sport Classics - Black Zunsport grilles - Stainless silencer and manifolds - K&N panel - shortshift - M030 suspension - 75mm throttle body - custom 83mm intake - SmartTop - custom remap - MDS underdrive pulley

Last edited by edc; 12-06-2017 at 12:56 PM. Reason: Extra info.
edc is offline   Reply With Quote
Old 12-06-2017, 01:01 PM   #26
Registered User
 
achillies's Avatar
 
Join Date: Apr 2016
Location: Tannersville PA
Posts: 395
I get that. But where does the 260 HP number come from? I don't think any 986 makes 260 at the flywheel. So if the RR says 285 at the wheels....that is well over 320 at the flywheel. Not possible.
__________________
2003 Boxster S
Speed Yellow
achillies is offline   Reply With Quote
Old 12-06-2017, 01:03 PM   #27
edc
550 Anniversary
 
edc's Avatar
 
Join Date: Jul 2012
Location: Surrey, UK
Posts: 429
Garage
In the UK the facelift 986 S is rated at 260, Anniversary 266, early S 252. It might be bhp or PS but the figures are all still the same.
__________________
Current: 550 Spyder Anniversary- Carnewal exhaust - 100 cell cats - stainless manifolds - 4" underdrive pulley - poly gearbox mounts - rear lower alu brace - adjustable rear toe links
Sold: 986S - Zenith Blue - 18" Sport Classics - Black Zunsport grilles - Stainless silencer and manifolds - K&N panel - shortshift - M030 suspension - 75mm throttle body - custom 83mm intake - SmartTop - custom remap - MDS underdrive pulley
edc is offline   Reply With Quote
Old 12-06-2017, 01:06 PM   #28
edc
550 Anniversary
 
edc's Avatar
 
Join Date: Jul 2012
Location: Surrey, UK
Posts: 429
Garage
The RR is not showing 285 at the wheels. Charlie who operates that dyno is round the corner from me and one been using him for a good few years. The 285 is the corrected flywheel figure. He does also provide the wheels figure and the AFR plot. But as he will tell you most people want the fly figure as its good pub talk. I only managed to get from him an overlay of my flywheel figures and I know all my at wheels data is still in his system but I never got the time to ask him to pull all those different runs for at wheels onto one graph.
__________________
Current: 550 Spyder Anniversary- Carnewal exhaust - 100 cell cats - stainless manifolds - 4" underdrive pulley - poly gearbox mounts - rear lower alu brace - adjustable rear toe links
Sold: 986S - Zenith Blue - 18" Sport Classics - Black Zunsport grilles - Stainless silencer and manifolds - K&N panel - shortshift - M030 suspension - 75mm throttle body - custom 83mm intake - SmartTop - custom remap - MDS underdrive pulley
edc is offline   Reply With Quote
Old 12-06-2017, 01:35 PM   #29
Registered User
 
achillies's Avatar
 
Join Date: Apr 2016
Location: Tannersville PA
Posts: 395
Thanks sooo much...I thought I was loosing my mind.
__________________
2003 Boxster S
Speed Yellow
achillies is offline   Reply With Quote
Old 12-06-2017, 07:09 PM   #30
Registered User
 
Join Date: Jun 2017
Location: Southeast
Posts: 23
There's still more power to be had. In those R&R videos they still have all the cats and are using the 986 MAF and tunes. I think 300+hp is achievable with decats and the larger MAF+Carrera tune.
deathsled986 is offline   Reply With Quote
Old 12-07-2017, 12:03 AM   #31
edc
550 Anniversary
 
edc's Avatar
 
Join Date: Jul 2012
Location: Surrey, UK
Posts: 429
Garage
The UK cars only have 1 pair of cats at the rear where you call the mid pipes. The 987 3.2 puts out 276PS or maybe 280 bhp. A couple of guys have dyno'd mods for this and not quite cracked 300 but I guess if you started with an already strong engine and high baseline then you can.
__________________
Current: 550 Spyder Anniversary- Carnewal exhaust - 100 cell cats - stainless manifolds - 4" underdrive pulley - poly gearbox mounts - rear lower alu brace - adjustable rear toe links
Sold: 986S - Zenith Blue - 18" Sport Classics - Black Zunsport grilles - Stainless silencer and manifolds - K&N panel - shortshift - M030 suspension - 75mm throttle body - custom 83mm intake - SmartTop - custom remap - MDS underdrive pulley
edc is offline   Reply With Quote
Old 12-07-2017, 02:33 PM   #32
Track rat
 
Topless's Avatar
 
Join Date: Nov 2006
Location: Cucamonga CA
Posts: 3,491
Garage
Quote:
Originally Posted by jsceash View Post
I think if you do some math 125# is equal to a 10hp change in power/weight ratio.
3150/255=12.35 stock

3025/255=11.86 -125#
3150/265=11.88 +10HP

2925/255=11.47 -225#
3150/275=11.45 +20HP
Yes and those weight loss numbers look even better when you realize that 20hp improves straight line acceleration only. Weight loss improves acceleration, braking distance and cornering speed. Back-of-the-napkin 986 performance improvements look something like this on a typical 2 minute race track:

Add 20hp, cost: $3000, shave 2/10s of a second/lap
Remove 200#, cost: zero, shave 2 seconds/lap.
Upgrade suspension and run R-Comp tires, cost: $5000, shave 5 seconds/lap

Some mods deliver a lot more measurable bang for the $$ so spend your long winter tinkering wisely.
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor
PCA Zone 8 DE/TT Chair (SoCal, AZ, NV)
Topless is offline   Reply With Quote
Old 12-07-2017, 02:38 PM   #33
Registered User
 
Join Date: Aug 2005
Location: Sanford NC
Posts: 2,037
Is your deep sump baffled? Better not to starve bearings with slicks on high speed turns.
mikefocke is offline   Reply With Quote
Old 12-07-2017, 03:00 PM   #34
Track rat
 
Topless's Avatar
 
Join Date: Nov 2006
Location: Cucamonga CA
Posts: 3,491
Garage
Quote:
Originally Posted by mikefocke View Post
Is your deep sump baffled? Better not to starve bearings with slicks on high speed turns.
I have been very fortunate regarding oil starvation. My 986 was set up for BSX class with *moderate* R-comp tires and logged over 100 track days including 20 at AAA Speedway which is notorious for killing 986 motors. We added the X51 pan and checked/topped the oil before every run session. Zero oiling issues even while posting top times.

My current car is a 987.2 with 4 scavenge pumps and a vastly improved oiling system. Zero oiling issues after 2.5 years and 40 track days. So far, so good.

__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor
PCA Zone 8 DE/TT Chair (SoCal, AZ, NV)
Topless is offline   Reply With Quote
Old 12-07-2017, 03:02 PM   #35
Motorist & Coffee Drinker
 
78F350's Avatar
 
Join Date: Jul 2014
Location: Oklahoma
Posts: 1,680
Garage
So, what's the best way to spend $1,000 (CDN?) lightening a Boxster?
Woody's build thread has some great weight loss info.
I'm guessing that seats and wheels are a good place to spend the money if you still have stock equipment.
-CF trunk and frunk.
-Remove the soft top? Make the soft top manual by removing the motor & transmissions?
-AC compressor, lines, and condensers?
-A couple pounds by removing the spoiler mechanism and fix it in the up position.
-Liners, carpet, and padding. Is it negligible weight loss vs loss of comfort?
...what next?
__________________
I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
78F350 is offline   Reply With Quote
Old 12-07-2017, 03:22 PM   #36
Track rat
 
Topless's Avatar
 
Join Date: Nov 2006
Location: Cucamonga CA
Posts: 3,491
Garage
Quote:
Originally Posted by 78F350 View Post
So, what's the best way to spend $1,000 (CDN?) lightening a Boxster?
Woody's build thread has some great weight loss info.
I'm guessing that seats and wheels are a good place to spend the money if you still have stock equipment.
-CF trunk and frunk.
-Remove the soft top? Make the soft top manual by removing the motor & transmissions?
-AC compressor, lines, and condensers?
-A couple pounds by removing the spoiler mechanism and fix it in the up position.
-Liners, carpet, and padding. Is it negligible weight loss vs loss of comfort?
...what next?
How far do you want to take your car? Wheels, stock interior, and top are the low hanging fruit and make a noticeable difference. The SPBOX guys have this down to a science regularly pulling 400 lbs off the car (which transforms it's performance). Then they put 50 lbs back in with a full cage. Tom Stone and Brad Roberts both have build threads detailing weight loss for winning 986 cars.

The 986 weight loss king was a manic AX guy from SFO (Grant) who got the dry weight down to around 2000lbs. That car also had 285 slicks all around and dominated the AX circuit for a while. I think it is in Texas now.

Weight loss works and costs very little to do.
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor
PCA Zone 8 DE/TT Chair (SoCal, AZ, NV)

Last edited by Topless; 12-07-2017 at 03:29 PM.
Topless is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 02:28 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2016 Pelican Parts - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page