Notices
997 Forum
Sponsored by:
Sponsored by:

997 3.8 IPD Plenum Install & Review

 
Old 01-06-2010, 09:31 PM
  #1  
mobonic
Super User
Thread Starter
 
mobonic's Avatar
 
Join Date: Oct 2008
Posts: 2,366
Likes: 0
Received 0 Likes on 0 Posts
Default 997 3.8 IPD Plenum Install & Review

IPD 3.8 Plenum

Make: IPD
Model: 997 3.8
Purchased from: RSS Stuttgart
Installed by: Self Installed



Name:  DSC01909.jpg
Views: 5132
Size:  165.7 KB



First Drive Impressions:

After installing this mod, its recommended to take a 5-20 mile drive so that the BOSCH ecu can relearn and remap the increases in air.

We could immediately feel that the car was relearning and adjusting to a difference.

After this drive there was a small notice in acceleration from 3500+ rpms. But no turbo like power increases.



Track Impressions:

We took the car to Willow Spring raceway for a testing day. After 20+ laps we observed the following with 2 drivers.

Observations:

1. The power difference is very hard to tell by the seat of the pants. We did not feel like there was a huge difference in before and after...but both felt like th car was a bit peppier all around.

2. What we did notice was that the car was pulling/accelerating harder in the higher rpms (3800 to redline) This is very good especially for track driving and we were happy about this.

3. Acceleration pulls were done on the front straight, and before and after plenum times were very similar, if anything the after plenum times were 1-2 tenths of a second faster after 4 runs from 2-4th gear topping out at 120 mph.


EVOMSIT ECU TUNE:

Since our race exhaust was installed we were getting a CEL light. So we contacted Evolution Motorsports to have the ECU coded.

At the time EVOMS stated that they could retune our ECU to take advantage of the intake and exhaust mods on the car:

Race Headers
Cat Bypass
1.5 lb Mufflers
Plenum


Once we got the ECU back and installed, the car was taken for a long drive.

After 20 miles of freeway driving the car was taken on back canyon roads. This is were the mods came to life.

The lost low end torque from the catless exhaust was back, and now the car pulled harder from 2500-4000 rpms.

Afte 4,000 rpms the car pulled ridiculously harder to redline, and we had to keep an eye on the tach not to keep hitting the rev limiter

Conclusion:

I think this mod alone is not a wonder fix, but its more of a sum of its parts.


With the hiflow exhaust, plenum and ecu retune by EVOMS, that where the true power from these mods is showcases and the performance speaks for itself. We are certain the car has more power through the rev band, and its more fun to drive.

Overall we are very happy with the IPD plenum install and will be keeping it in the car and installing it on another car soon.


Notes:

We did not decide to do a dyno before and after as we do not believe in them.

The car is driven on the road and the track and that is where we care about performance, not on a piece of paper.












Detailed Images and Installation pics


Name:  DSC01914.jpg
Views: 4300
Size:  133.3 KB



IPD Plenum vs. Stock 997S Plenum

Here you can the the quality difference between the stock T shaped and the IPD Y shape.


Name:  DSC01909.jpg
Views: 5132
Size:  165.7 KB

Name:  DSC01910.jpg
Views: 4265
Size:  107.9 KB

Name:  DSC01911.jpg
Views: 4341
Size:  117.4 KB

Name:  DSC01912.jpg
Views: 4736
Size:  116.2 KB


IPD Plenum Installed

Name:  DSC01915.jpg
Views: 4303
Size:  132.9 KB

Name:  DSC01916.jpg
Views: 4320
Size:  132.6 KB


Name:  DSC01917.jpg
Views: 4334
Size:  126.1 KB


Name:  DSC01919.jpg
Views: 4473
Size:  154.3 KB
mobonic is offline  
Old 01-07-2010, 12:40 AM
  #2  
Edgy01
Poseur
Rennlist Member
 
Edgy01's Avatar
 
Join Date: Nov 2005
Location: Santa Barbara, CA
Posts: 17,500
Likes: 0
Received 0 Likes on 0 Posts
Default

I like that. "We didn't do a dyno because we don't believe in them." Says it all.
Edgy01 is offline  
Old 01-07-2010, 01:14 AM
  #3  
mobonic
Super User
Thread Starter
 
mobonic's Avatar
 
Join Date: Oct 2008
Posts: 2,366
Likes: 0
Received 0 Likes on 0 Posts
Default

I have never dyno'd my nor will i ever.

Do you drive your car on a dyno?

+ ... porsche's need a lot of cooling through the radiators... which dyno fans can not reproduce....

I have heard of many porsche's getting hurt on dyno's because of this problem.
mobonic is offline  
Old 01-07-2010, 01:50 AM
  #4  
mdrums
Addict
Rennlist Member
 
mdrums's Avatar
 
Join Date: Mar 2006
Location: Tampa
Posts: 14,872
Received 13 Likes on 5 Posts
Default

Basically the conclusion and what I have said for years on these forums is everything works as a system. As soon as you change the breaking of the engine you have to tune the cars ECU to take advantage of this.
mdrums is offline  
Old 01-07-2010, 02:54 AM
  #5  
brendo
User
 
brendo's Avatar
 
Join Date: Apr 2008
Location: Seattle
Posts: 1,263
Likes: 0
Received 0 Likes on 0 Posts
Default

honestly i believe you probably created an incremental gain in performance but i don't get the aversion to quantifying it. seems very very silly to me. you don't believe in numbers? data? that it will hurt the car? that it's not relevant? what?:

We did not decide to do a dyno before and after as we do not believe in them.

The car is driven on the road and the track and that is where we care about performance, not on a piece of paper.
brendo is offline  
Old 01-07-2010, 10:40 AM
  #6  
RollingArt
Super User
 
RollingArt's Avatar
 
Join Date: Mar 2009
Location: Oregon
Posts: 2,016
Likes: 0
Received 0 Likes on 0 Posts
Default

Nice write up.

What headers are you using?



Phil
RollingArt is offline  
Old 01-07-2010, 10:51 AM
  #7  
utkinpol
Super User
 
utkinpol's Avatar
 
Join Date: Jul 2009
Location: MA
Posts: 5,888
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by mdrums View Post
Basically the conclusion and what I have said for years on these forums is everything works as a system. As soon as you change the breaking of the engine you have to tune the cars ECU to take advantage of this.
I installed plenum after I did all the rest - 200 cell cats, mufflers, K&N air filter, maf cleaning, ecu flash. I would not say car started to pull noticeably harder on hi revs after plenum add-on
as it is just difficult to notice but it definitely improved engine stability when i drive it on very low speed like 3-5 mph, then means it really does breath a bit better with plenum, as it should.

I think it is an OK add-on to do if you have extra cash you don`t know what to do with.
utkinpol is offline  
Old 01-07-2010, 10:54 AM
  #8  
utkinpol
Super User
 
utkinpol's Avatar
 
Join Date: Jul 2009
Location: MA
Posts: 5,888
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by mobonic View Post
Race Headers
Cat Bypass
1.5 lb Mufflers
Running on straight racing pipes on a public roads - aren`t you afraid to meet a cop somewhere? That will be a heck of a ticket.
I do not care much to obey any stupid regulation they impose, but sound of a cup car on an open road cannot go unnoticed.
utkinpol is offline  
Old 01-07-2010, 02:23 PM
  #9  
Edgy01
Poseur
Rennlist Member
 
Edgy01's Avatar
 
Join Date: Nov 2005
Location: Santa Barbara, CA
Posts: 17,500
Likes: 0
Received 0 Likes on 0 Posts
Default

That part could be put on a flow bench to ascertain its contributing to the breathing of the engine. That would be worth knowing.
Edgy01 is offline  
Old 01-08-2010, 03:25 AM
  #10  
mobonic
Super User
Thread Starter
 
mobonic's Avatar
 
Join Date: Oct 2008
Posts: 2,366
Likes: 0
Received 0 Likes on 0 Posts
Default

I only belive in dynos for a baseline, not a true reading.

In a perfect world I would have done a baseline on a dyno with my car 1 and then after the mods are done.

Then you get a base and then the second dyno run on the same dyno you get another number.

Compare the two and see what your mods did.

I would not trust the number just the difference in numbers.

BUT, then you have all the other factors/variables to address.

Dynos have too many loose ends... and I dont like loose ends.

I dont care about having a HP number to go with my car. I do my research and I DECIDE whether or not I feel the mods is worth it for my car and track performance and reliability.

Sorry guys I'll get off my dumb soap box.

Basically these mods are for me no one else. I just trying to give the most OBJECTIVE review I can because thats what i would want from the next person.

Hope that helps.
mobonic is offline  
Old 01-08-2010, 03:54 AM
  #11  
JohnnyBahamas
Super User
 
JohnnyBahamas's Avatar
 
Join Date: Dec 2004
Posts: 3,607
Likes: 0
Received 0 Likes on 0 Posts
Default

It's very shiny.
JohnnyBahamas is offline  
Old 01-08-2010, 10:45 AM
  #12  
RollingArt
Super User
 
RollingArt's Avatar
 
Join Date: Mar 2009
Location: Oregon
Posts: 2,016
Likes: 0
Received 0 Likes on 0 Posts
Default

Headers?
RollingArt is offline  
Old 01-08-2010, 04:17 PM
  #13  
mobonic
Super User
Thread Starter
 
mobonic's Avatar
 
Join Date: Oct 2008
Posts: 2,366
Likes: 0
Received 0 Likes on 0 Posts
Default

Headers are custom made by Synergy Racing
mobonic is offline  
Old 01-08-2010, 04:18 PM
  #14  
mobonic
Super User
Thread Starter
 
mobonic's Avatar
 
Join Date: Oct 2008
Posts: 2,366
Likes: 0
Received 0 Likes on 0 Posts
Default

They are not straight pipes

They have dual 1.5 lb mufflers

not as loud as muffler bypass
mobonic is offline  
Old 01-08-2010, 04:22 PM
  #15  
utkinpol
Super User
 
utkinpol's Avatar
 
Join Date: Jul 2009
Location: MA
Posts: 5,888
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by mobonic View Post
They are not straight pipes

They have dual 1.5 lb mufflers

not as loud as muffler bypass
Too bad you are too far away - I could show this car to my wife and tell her - look, _this_ car is not considered as 'too loud'.

She forces me to put stock mufflers back, as she cannot tolerate fabspeed maxflos with x-pipe cats. Life is full of compromises...
utkinpol is offline  

Thread Tools
Search this Thread
Quick Reply: 997 3.8 IPD Plenum Install & Review


Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: