Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 07-14-2014, 07:01 AM   #1
Registered User
 
steved0x's Avatar
 
Join Date: Dec 2012
Location: FL
Posts: 3,908
I installed my Top Speed cat bypass pipes this weekend - I am happy with them!

These are the pipes:
http://986forum.com/forums/boxster-parts-sale-wanted/52134-f-s-che-986-boxster-boxster-s-test-pipes.html

I also went ahead and ordered a set of these Easy Seal clamps because I heard that they seal better than the included clamps.

Top Speed's Cat Back System Installation

Now that I am done I think that the included clamps would have been fine for me, but the Easy Seal clamps were pretty cheap and I didn't want to have to get under there twice. The piece that has a profile like an hourglass is not symmetrical; make sure it goes the right way. If you think about it, it is obvious which is the right way. If it is wrong it won't seal the join between the two pipes very well. (I did it the wrong way on the first side and I couldn't figure out why there was such a gap in the seal, until I figured it out)

My car is a 2000 S with (well until now) an all stock exhaust, stock headers with integrated cats and stock muffler.

Removing the existing secondary cats:

This went much easier than I had thought. I think it may have been because I had the IMS Bearing replaced Dec 2012 and so the exhaust was removed at that time? And so everything wasn't welded in place with 14 years of rust and heat cycles? This was the part I was the most afraid of - that some bolts or something would snap and I would be stuck. Turns out that I didn't need to use any PB Blaster or anything (although on hindsight I wish I had as I believe I greatly increased the chances of something snapping without it). I was able to remove everything just with regular sockets and box wrenches, no breaker bars.

Installation:
This went fairly straightforward, the driver's side went on pretty easy, The toughest part was threading the bolts through the flange where the pipes connected to the outlet of the stock header. At first I fit the back parts of the pipes together and then lined up the flange, but I could never get it just right so I took it all apart and then loosely connected the bypass pipe to the header outlet, and then fit the back part in.

Passenger side: After many attempts and contortions, I finally took the adapter pipe (the one that is around 6-8" long) to Tire kingdom and had them cut off around 2/3" of the back end, and then that side went together like a champ. NOTE: The driver side was fully tightened down when I started the passenger side, and I noted that while installing the driver side I was able to get some wiggle out of the muffler. If I had kept everything loose, I may have had enough wiggle room to get the passenger side installed without trimming. My advise, don't tighten everything up until you get both sides fitted.

Hardware:
The pipes were very nice. I didn't use the included clamps, and I didn't use any of the nuts and bolts either; I believe they were for the flange, and they looked longer than the ones that came with the car. Space was so tight in there (especially the top one) that I just reused the existing hardware on the driver side, and when I was out trying to get the pipe adapter cut I picked up new hardware for the pax side.

Results:
Sound is definitely a little throatier, a little louder, and when you are accelerating you get a little more "sound" altogether, and in a good way. When you rev match you get a little hint of "burble" for lack of a better word when the revs are dropping down after the blip. I don't recall this being present before.

Performance seems a little "peppier" than before but maybe that is my imagination. I just spent a weekend at Road Atlanta with a lot of long WOT accelerations so it is hard for me to compare that with regular driving. I am doing an autocross in 2 weeks so I will report back. (And I guess these pipes move me out of BS into BSP... luckily for me I am so new that this will not affect my competitiveness... although I did win BS one time against 2 Honda S2000s. But the next time a husband wife team in an S2000 beat me by 6 seconds... 40 something vs 46 something... that is huge!)

Summary:
Fairly easy to install, nice sound, I believe there is a little performance boost (and the old cats are heavy! the piper are much lighter)

Tips:
Remove the back wheels - it is much easier to access the top bolt on the flange where the pipes meet the outlet of the stock header, and also easier to climb under the car and move your elbows and arms around with these rear wheels removed.
Don't tighten up the 3 bolts on the flange side until you get both sides in.
You can do this job without removing the big triangle plate and braces under there, but if you are having a very hard time with the flange end of the pipe, removing this may provide some relief. I was able to do it without removing it.

Would I do it again? Yes I would. And I am now considering getting the muffler to go with it, I have heard that combining the muffler with the cat deleted pipes resolves the drone issues that some folks have had when using the muffler with the stock secondary cats in place.

Steve

steved0x is offline   Reply With Quote
Old 07-14-2014, 10:36 AM   #2
Registered User
 
Join Date: Sep 2013
Location: Fullerton/Brea, CA
Posts: 43
Can you post a sound clip? So, you're on stock mufflers... I take it these shouldn't introduce droning then correct?
rijc99 is offline   Reply With Quote
Old 07-14-2014, 10:53 AM   #3
Registered User
 
steved0x's Avatar
 
Join Date: Dec 2012
Location: FL
Posts: 3,908
Quote:
Originally Posted by rijc99 View Post
Can you post a sound clip? So, you're on stock mufflers... I take it these shouldn't introduce droning then correct?
I am on the stock muffler, and these cat delete pipes have not introduced any drone. I think the drone can come with aftermarket mufflers that have two independent chambers and don't connect like the stock muffler.

My son took a video, I will see if I can get it posted. It does sound quite nice and is a definite difference over all stock.

Steve
steved0x is offline   Reply With Quote
Old 07-15-2014, 01:04 PM   #4
Registered User
 
Join Date: Sep 2013
Location: Fullerton/Brea, CA
Posts: 43
Quote:
Originally Posted by steved0x View Post
I am on the stock muffler, and these cat delete pipes have not introduced any drone. I think the drone can come with aftermarket mufflers that have two independent chambers and don't connect like the stock muffler.

My son took a video, I will see if I can get it posted. It does sound quite nice and is a definite difference over all stock.

Steve
I ordered the combo but am on the fence about the muffler. I'm really worried about droning. I might do the secondary pipes first and then proceed from there.

Let me know if you do go with the muffler.

And thanks in advance on the video.
rijc99 is offline   Reply With Quote
Old 07-21-2014, 10:24 AM   #5
Registered User
 
steved0x's Avatar
 
Join Date: Dec 2012
Location: FL
Posts: 3,908
Quote:
Originally Posted by rijc99 View Post

And thanks in advance on the video.
We are not having any luck with the video, but I am going to autocross Sunday, and those videos are uploaded a different way. I run with the top down, and will be at relatively high revs so you should be able to hear it there.

After driving on it a few more times it seems "deeper" that the stock sound, and more "meaty" if that makes sense. It is not a huge overwhelming change but it is definite And in the lower gears there definitely feels like a difference at 4000+, the kick in the pants is stronger. I haven't tried it on the higher gears yet as I rarely get over 4000 in any gears except 1 & 2 on the street.
steved0x is offline   Reply With Quote
Old 07-21-2014, 08:55 PM   #6
Registered User
 
Join Date: Sep 2013
Location: Fullerton/Brea, CA
Posts: 43
Installed the bypass pipes and muffler... happy with the overall tone when accelerating but getting too old for the added noise when cruising with hardtop on/window up. So, I'm thinking I'm going to go your route and just do the bypass pipes with stock muffler. Oh well. Should've tried it your way first.

The Top Speed muffler (15 miles used) will be in the FS section soon.
rijc99 is offline   Reply With Quote
Old 07-22-2014, 08:02 AM   #7
Registered User
 
Dlirium's Avatar
 
Join Date: Oct 2013
Location: San Jose, CA
Posts: 583
Garage
Quote:
Originally Posted by rijc99 View Post
Installed the bypass pipes and muffler... happy with the overall tone when accelerating but getting too old for the added noise when cruising with hardtop on/window up. So, I'm thinking I'm going to go your route and just do the bypass pipes with stock muffler. Oh well. Should've tried it your way first.

The Top Speed muffler (15 miles used) will be in the FS section soon.
Is this what you have

PORSCHE 986 BOXSTER & BOXSTER S 2.5L 2.7L 3.2L 97-04 AXLE-BACK EXHAUST SYSTEM *** SINGLE LAYER OR DUAL LAYER TIPS
__________________
2000 S - Borla Exhaust, TS Cat Deletes, RSS UDP, B&M Short Shift, T96 Steering Wheel, Potenza RE-71R's,
Mantis 2.0L Deep Sump, de-snorkeled, Bilstein PSS9 Coil-Overs, Rennline lug studs, and auto crossed regularly
.
Dlirium is offline   Reply With Quote
Old 07-22-2014, 07:02 PM   #8
Registered User
 
Join Date: Sep 2013
Location: Fullerton/Brea, CA
Posts: 43
Yep, that's the one.
rijc99 is offline   Reply With Quote
Old 07-22-2014, 10:13 PM   #9
Registered User
 
Porsche9's Avatar
 
Join Date: Sep 2013
Location: Chandler, AZ
Posts: 1,795
One of the unexpected benefits of the bypass pipe is the the truck does not get as hot.
__________________
03 Carrera
02 Boxster S Guards Red, black interior with matching hardtop
89 Carrera 4
89 944 S2
78 911SC
Porsche9 is offline   Reply With Quote
Old 07-23-2014, 01:39 PM   #10
Registered User
 
Join Date: Sep 2013
Location: Fullerton/Brea, CA
Posts: 43
Quote:
Originally Posted by Porsche9 View Post
One of the unexpected benefits of the bypass pipe is the the truck does not get as hot.
Oh man... it was kinda nice. Especially if I leave a jacket in there for evening trips.

rijc99 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 07:13 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