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

Reply
 
LinkBack Thread Tools Display Modes
Old 01-28-2010, 04:21 AM   #1
Registered User
 
Join Date: Jul 2009
Location: Central Florida
Posts: 17
Instant-G

Does anyone have any info about their exhaust system? I did a search for this topic and only came up with a couple threads in which it was briefly mentioned, both of them positive. I'm just curious as to whether anyone has verified the claim of an extra 32 hp out of the 3.2 Boxster S engine with their exhaust mod.

http://www.instant-g.com/
__________________
Mark Dreyer
Kissimmee Florida
Daily Driver: 09 Jetta TDI
Weekend Fun car: 02 Boxster S
Mark Dreyer is offline   Reply With Quote
Old 01-28-2010, 05:06 AM   #2
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,081
Quote:
Originally Posted by Mark Dreyer
I'm just curious as to whether anyone has verified the claim of an extra 32 hp out of the 3.2 Boxster S engine with their exhaust mod.
Highly dubious and decidedly unsubstantiated claim..................
__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA is offline   Reply With Quote
Old 01-28-2010, 05:34 AM   #3
Registered User
 
Join Date: Nov 2003
Location: Illinois
Posts: 3,033
Quote:
Originally Posted by Mark Dreyer
I'm just curious as to whether anyone has verified the claim of an extra 32 hp out of the 3.2 Boxster S engine with their exhaust mod.

http://www.instant-g.com/
lol...like Jeff said 32 hp from an exhaust swap is completely unheard of and wishful thinking.
__________________
'03 3.2L GuardsRed/Blk/Blk---6Spd
Options: Litronics, 18" Carrera lights, Bose sound, Painted to match roll bars.
http://i100.photobucket.com/albums/m...Mautocross.jpg
Adam is offline   Reply With Quote
Old 01-28-2010, 05:56 AM   #4
07 Carrera S Cab
 
Boxtaboy's Avatar
 
Join Date: Nov 2005
Location: New Jersey
Posts: 2,273
Garage
LOL. 32hp from just changing the exhaust? That is a funny one. If that's the case, everyone can just forego spending the extra $10k in buying the S, and just get this exhaust, and have the same power. They would probably sell more exhausts if they just claimed a slight increase like 8hp...something not really measureable, even though it probably loses power.
__________________
Current: 07 Carrera S Cab in Midnight Blue

Previous: 01 Boxster in Arctic Silver, 86 944 in Guards Red
Boxtaboy is offline   Reply With Quote
Old 01-28-2010, 06:03 AM   #5
Registered User
 
Join Date: Sep 2005
Location: Sacramento
Posts: 3,417
Send a message via AIM to blinkwatt
Quote:
Originally Posted by Adam
lol...like Jeff said 32 hp from an exhaust swap is completely unheard of and wishful thinking.
I could see it being possible.

Over on the Boxster Spec Racing boards I believe it was Bill Pickering who dynoed a ton of exhaust and was able to pull out +15hp from one set that replaced the muffler only on a 2.5L. Many of the other ones gave out much less.

Forum Member Randall I pulled +10hp from Che's headers no?

I would think it's possible,does anyone have any dyno graphs to prove their gains though?
__________________
-99' Zenith Blue 5-spd...didn't agree with a center divider on the freeway
-01' S Orient Red Metallic 6-spd...money pit...sold to buy a house
blinkwatt is offline   Reply With Quote
Old 01-28-2010, 08:29 AM   #6
Registered User
 
Join Date: May 2007
Location: California
Posts: 71
I believe Bill's nearly free flow exhausts were painfully loud. He has documented the 15hp gain in a certain rpm range. I don't think anybody would want those exhausts on the street however - it's almost like no exhaust at all.

I got caught in a gaggle of SpecBoxsters at Thunderhill during practice session and I just had to slow down and let them pass (they would have anyway) - I couldn't hear anything but BLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH. Get a group of them together and you can't even hear yourself think.


kj

Last edited by Boxster44; 01-28-2010 at 08:37 AM. Reason: add'l
Boxster44 is offline   Reply With Quote
Old 01-28-2010, 09:40 AM   #7
Registered User
 
Join Date: Nov 2007
Location: Chicago suburbs
Posts: 1,675
32 HP? I think it actually makes your wallet 32 lbs lighter.
__________________
JGM
2002 Boxster S
1973 911 Green FrankenMeanie
PCA DE Instructor circa '95
jmatta is offline   Reply With Quote
Old 01-28-2010, 10:01 AM   #8
Registered User
 
Join Date: Mar 2009
Location: DFW, TX
Posts: 206
Garage
"32 HP? I think it actually makes your wallet 32 lbs lighter"

When you look for the fine print it usually says: muffler, cat back pipes, headers / sport cats, cold air intake and Chip programming. You add all that stuff up and I think 32 lbs sound about right.

For me it is more about sound. I am one of those louder is better people. On my old 930 Turbo the exhaust was so loud, my wife told me she could hear me 1/2 mile away I loved it.
__________________
rob76turbo
Current Porsches: 2002 Boxster S (Speed yellow)
Past Porsches: 1972 914, 1987 944S, 1976 930, 1986 951, 1999 986, 1992 968, 2001 986 S, 2006 Cayman S, 1986 951 track car, 2001 986 S, 2005 Cayenne

Last edited by rob76turbo; 01-28-2010 at 10:03 AM. Reason: add photo
rob76turbo is offline   Reply With Quote
Old 01-30-2010, 09:26 AM   #9
Registered User
 
Johnny Danger's Avatar
 
Join Date: Nov 2008
Location: Massachusetts
Posts: 4,809
Garage
I spoke with the owner of Instant-G awhile back concerning his exhaust systems. Needless to say, he had some interesting thoughts to share regarding his exhaust upgrades for the boxster. Unfortunately, the diameter of his system is proprietary, and, therefore it is not compatible with either oem or after market components. In any case, claiming a gain of 32 hp solely from an exhaust upgrade is a bit ridiculous.

Last edited by Johnny Danger; 01-30-2010 at 09:29 AM.
Johnny Danger is offline   Reply With Quote
Old 01-30-2010, 04:03 PM   #10
Registered User
 
Join Date: Jan 2007
Location: Depends on the day of the week....
Posts: 1,400
From just the exhaust, no way. I've seen the Instant-G stuff, and it certainly looks different than anything else. Good or bad I don't know, but it's certainly different.
__________________
Boxster S
Cloudsurfer is offline   Reply With Quote
Old 01-30-2010, 04:05 PM   #11
Registered User
 
Join Date: Aug 2005
Location: Sanford NC
Posts: 2,316
When I was young I thought

my ears could last forever. Now I'm a bit older and wished I'd turned the volume down.
mikefocke is online now   Reply With Quote
Old 01-30-2010, 04:41 PM   #12
Registered User
 
Join Date: May 2008
Location: Toronto
Posts: 2,655
Quote:
Originally Posted by Johnny Danger
the diameter of his system is proprietary
O.....kay.
ekam is offline   Reply With Quote
Old 01-31-2010, 04:25 AM   #13
Registered User
 
Johnny Danger's Avatar
 
Join Date: Nov 2008
Location: Massachusetts
Posts: 4,809
Garage
Quote:
Originally Posted by ekam
O.....kay.
This is an excerpt from Instant- G's web site
Instant-G Stainless Boxster 3.2/3.4 Headers.
The stock Boxster uses 1-3/8" tubing. The Boxster "S" exhaust is a joke and actually necks down to less than a square inch before the catalyst.. Porsche had to figure out some way to get rid of 32 HP!
Here's the deal.

The 996 makes 300 HP at 3.4 ltrs. 88 HP per liter.
The Boxster "S" makes 250 HP at 3.2 ltr. 78 HP per liter.
It doesn't take a rocket scientist to show that if you can get 996 power out of a Boxster "S" you'd gain 32 HP.
Now the kicker - these headers with no change to the cat or muffler same dimensions but built for a 996 make 318-320 HP with no mods to the DME. (94 HP/liter)
That means that you should be able to get 300 HP out of a Boxster "S".

It ain't rocket science. Well, maybe the headers are but the logic isn't!

NOTE: We sell this as a complete solution, from header through cat and INCLUDING muffler and your choice of tips. Porsche uses 1-5/8" tubing as primaries, we use 2-1/4. That is 80% more crossectional area.

When I spoke with the gentleman, he indicated that his exhaust components use larger diameter size flanges, piping and joinery through out. In addition, the design of the merge collector and the length of the primaries on his headers were altogether different from any oem or aftermarket system. Therefore, his headers, cats and cat back muffler will not "tie" into either the factory system or an aftermarket one that has the same size diameter as the oem.

Last edited by Johnny Danger; 01-31-2010 at 05:12 AM.
Johnny Danger is offline   Reply With Quote
Old 01-31-2010, 04:31 AM   #14
07 Carrera S Cab
 
Boxtaboy's Avatar
 
Join Date: Nov 2005
Location: New Jersey
Posts: 2,273
Garage
If it is the complete exhaust running from the headers all the way to the mufflers, I can see how there could be an improvement. Whether or not it's 32hp, who knows. I thought they were claiming 32 just from a cat back muffler.
__________________
Current: 07 Carrera S Cab in Midnight Blue

Previous: 01 Boxster in Arctic Silver, 86 944 in Guards Red
Boxtaboy is offline   Reply With Quote
Old 01-31-2010, 04:57 AM   #15
Registered User
 
Johnny Danger's Avatar
 
Join Date: Nov 2008
Location: Massachusetts
Posts: 4,809
Garage
I have never seen primaries of this length or a merge collector of this design, along with piping of this diameter, to include "olive" joints, used in conjunction with a 986 exhaust.

Last edited by Johnny Danger; 02-03-2010 at 03:16 AM.
Johnny Danger is offline   Reply With Quote
Old 01-31-2010, 05:57 AM   #16
Registered User
 
Join Date: Jun 2009
Location: Colorado
Posts: 25
>For me it is more about sound. I am one of those louder is better people.

Me too, but I prefer loud motorcycles to loud cars. Here's my Triumph triple with D&D cans. Don't forget your rubbers (earplugs) ... Tom

Installation...


Ready to rumble. Horsepower gain... Who cares !


....French video
http://www.youtube.com/watch?v=4Vl6ZsLfyMs&feature=player_embedded
__________________
Porsche 987
BMW 335xi
Aprilia SL-1000R
Triumph Sprint 1050
Werks is offline   Reply With Quote
Old 01-31-2010, 12:49 PM   #17
Registered User
 
Join Date: May 2008
Location: Toronto
Posts: 2,655
Quote:
Originally Posted by Johnny Danger
I have never seen primaries of this length or a merge collector of this design, along with piping of this diameter, to include "olive" joints, use in conjunction with a 986 exhaust.
The collectors are just plain ugly... and cheap.

Here's how they should look like (from a 997):

Last edited by ekam; 01-31-2010 at 12:56 PM.
ekam is offline   Reply With Quote
Old 02-02-2010, 11:57 PM   #18
arnoldclab
Guest
 
Posts: n/a
Instant-G 993 Exhaust Systems for 911 3.6 Conversions (Also works GREAT for 3.2!)
Pricing:
$1345 for all through 964 engines (Rotated Flanges) , modified stock 993 cat.
$1095 for 993 engines (Stock Flanges) modified stock 993 cat
$1995/2195 when substituting 'Happy Crab" muffler, complete with all under-engine plumbing for heat.
$1445/$1695 for heat exchangers and the Happy Crab
$1195 for the happy crab alone.
Discount applies when purchaced with a 3.6 conversion kit.
On both these systems, headers modified with welded heater exit, dual outlet tips added to catalyst, and all hoses brackets, etc. are included
The happy crab includes for 100% stainless oval resonator tips
Price DOES NOT include Thom Fitzpatrick's CF heater tube shown below.
System includes:
* Factory 1-5/8" 993 Heat exchangers (modified for 964 by rotating driver's side flanges, welding and precision surfacing)
* Modified catalyst with stainless exhaust tips and provision for 02 sensor
* Heater distribution tubes -w- factory rubber elbows
* Stainless hose adapters and high temp silicone tubing (About $50 in tubing)
* All required clamps, brackets, etc.
* Complete instructions and tech support
Note: You may supply your own 993 exhaust. Modification prices are as follows:
* Rotate header flanges and surface mill $249
* Add welded adapters to accept 2.5" Silicone tubing $75
* Hi-temp silicone hoses and clamps $55
* Add straight-through exhaust tips to cats $175
Factory components available separately:
* Headers $475 per pair unmodified, $649 modified
* Catalyst $400 unmodified
* Heater distribution aluminum casting with factory rubber elbows $295
o 993-211-360-00,
o 993-211-039-02 (2)
* Catalyst bracket with clamps $65
* 993 Short Pipe (joins CF tube to sheet metal) 993-211-034-01 $25
* Short silicone hoses (45mm length) $20 pair when in stock.
  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 04:11 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page