Best dyno vid I have seen. Excellent description of the graphing and power gains. A great tutorial on the failures you can expect to see with plastic and rubber parts on an older vehicle. Well done!
Excellent video- would also love to see: 1. New Header install. 2. Fabspeed exhaust (or equivalent). 3. Cold Air intake. 4. + TPC Plen. Then a Dyno run..... Thanks
FYI for those interested...that plastic coolant hose joiner is now available made from aluminum. Pelican sells it as well as others. I like that I'll never have to worry about breaking it again!
*Golf Clap* This validates how much less HP we have compared to some of the caymans in our class. Oh and I have a few extra's of those plastic junctions when I work on the car just for this type of situation. Great Video!
Over $1000 for a nominal gain. I’ve also seen a Mythbuster vid on YT with a 997.1 where the upgrade to GT3 (I think) made 1hp difference. I think it’s worth checking out because I honestly wouldn’t expect just a plenum and TB to make much difference, given that all the piping and air filter box are still the same a conversion like this can’t affect the air coming into the filter. Usual form with the Boxster upgrade is upgrading the filter to TB pipe size which isn’t pretty. Obviously there is a noticeable size difference. It was noticeable that on the 997.1 vid they also separately added a K&N cone filter which lost hp!
Nicely done! Having done an air intake, throttle body and plenum upgrade on my 986 S, it was really interesting to see the differences when working on a 996. I will say that removing the airbox/maf unit in the Boxster was much more difficult than what you just did! On the other hand, the plenum and throttle body removal is easier on the 986. I have documented my modification on my channel. I like that IPD plenum, maybe when my next old age pension cheque comes in! Haha
Excellent video. The only thing missing are before and after comments from the owner/driver on throttle response and performance improvement on the road . I've been thinking about this upgrade for a 2004 996 C4S with X51 Power Kit and would like to hear an owners perspective on driveability and performance gains.
I would discredit the second dyno run because the car needs to drive atleast 300-400 miles for the ecu to reprogram and relearn to compensate for the bigger throttle body. Thats why the bhp gain isnt as significant. The car will run richer too.
I'd say a Cobb access port or a professional tune would do better. If you are going to change out the the intake, then might as well go with an aftermarket intake, IPD plenum. Or you can do what I did, save your money and just find a 996 turbo.
For this 1999 Carrera 996 there is no possibility to upgrade to a larger 82mm TB since it utilizes a Cable TB (Non E-Gas). The 74mm Cable TB is the largest Cable TB that Porsche offers. Only E-Gas applications have the ability to install a larger 82mm TB.
Would replacing the stock air box with a K&N intake or a Fabspeed allow you to take better advantage of the plenum? Thinking the combination of the two may be larger than the sum of the plenum or airbox on their own.
![Porsche 964 ITB Upgrade [Incredible Sound] + Wavetrac LSD, AT Power ITBs, Longman Racing ECU & More!](http://i.ytimg.com/vi/cun-fNzU9ok/mqdefault.jpg)
Best dyno vid I have seen. Excellent description of the graphing and power gains. A great tutorial on the failures you can expect to see with plastic and rubber parts on an older vehicle. Well done!
Thanks for not editing out the ooops--that's the reality of working on a 20 year old car.
Excellent video- would also love to see: 1. New Header install. 2. Fabspeed exhaust (or equivalent). 3. Cold Air intake. 4. + TPC Plen. Then a Dyno run..... Thanks
Great video, thank you for making a very practical video about the 996 series these are wonderful cars. Would love to see more and more 996 content.
So glad you showed the broken part. It makes it more relatable.
FYI for those interested...that plastic coolant hose joiner is now available made from aluminum. Pelican sells it as well as others. I like that I'll never have to worry about breaking it again!
That's what we upgraded to as well.
Actually impressed at the baseline wheel horsepower for a 20 year old car. And I too noticed the sound difference on the IPD pulls.
*Golf Clap* This validates how much less HP we have compared to some of the caymans in our class. Oh and I have a few extra's of those plastic junctions when I work on the car just for this type of situation. Great Video!
Great video! Answers some of my questions and I’m sure it will cause a stir on multiple forums.
Thanks for doing this been waiting for years for someone to actually do this test good to see it's working but still don't justify the price.
Over $1000 for a nominal gain. I’ve also seen a Mythbuster vid on YT with a 997.1 where the upgrade to GT3 (I think) made 1hp difference. I think it’s worth checking out because I honestly wouldn’t expect just a plenum and TB to make much difference, given that all the piping and air filter box are still the same a conversion like this can’t affect the air coming into the filter. Usual form with the Boxster upgrade is upgrading the filter to TB pipe size which isn’t pretty. Obviously there is a noticeable size difference. It was noticeable that on the 997.1 vid they also separately added a K&N cone filter which lost hp!
What was the total job time including repairing the broken coolant line and replacing the connector?
Just bought an IPD Plenum, can't wait to get it on!! '03 C4S
How are your results?
Nicely done! Having done an air intake, throttle body and plenum upgrade on my 986 S, it was really interesting to see the differences when working on a 996. I will say that removing the airbox/maf unit in the Boxster was much more difficult than what you just did! On the other hand, the plenum and throttle body removal is easier on the 986. I have documented my modification on my channel. I like that IPD plenum, maybe when my next old age pension cheque comes in! Haha
Great video! Thank you very much!
Glad you liked it!
Excellent video. The only thing missing are before and after comments from the owner/driver on throttle response and performance improvement on the road . I've been thinking about this upgrade for a 2004 996 C4S with X51 Power Kit and would like to hear an owners perspective on driveability and performance gains.
@cabby is your c4s for sale?
@@mehdijafri8424 my C4S is for sale, £35,000.
Nice video, I wonder if Mike would recommend a chip tune after this install, or especially if you are also modifying your exhaust!
A couple of guys I follow on YT use DPA mics with a wireless set-up, pricey, but top notch audio.
Clearly, the car had a different intake tube (silicon) and the resonator box bypass, but likely that didn't change power.
I would discredit the second dyno run because the car needs to drive atleast 300-400 miles for the ecu to reprogram and relearn to compensate for the bigger throttle body. Thats why the bhp gain isnt as significant. The car will run richer too.
I'd say a Cobb access port or a professional tune would do better. If you are going to change out the the intake, then might as well go with an aftermarket intake, IPD plenum. Or you can do what I did, save your money and just find a 996 turbo.
Hello, thank you for the video. What would it cost to install and replace the fragile hoses too?
I have an IPD plenum on my 08 CSS and my butt dyno could feel the mid range torque inc.
Now you should try the GT3 throttle body.
Hi Vu, do you think already having the sport exhaust helped some of the gains from the intake plenum?
How much do they pay Tom to hold the flashlight?
why not upgrade the throttle body and or mass airflow sensor for larger ones since changing the plenum???
For this 1999 Carrera 996 there is no possibility to upgrade to a larger 82mm TB since it utilizes a Cable TB (Non E-Gas).
The 74mm Cable TB is the largest Cable TB that Porsche offers. Only E-Gas applications have the ability to install a larger 82mm TB.
@@PorscheClubofAmerica Probably a big untapped market then if someone designed parts and 3D printed some prototypes to test 🤔👍😊
This makes no sense to me. The cars had around 300 HP these results made no sense to me. Did we lose 60 horse power in 20 plus years?
300 hp is at the flywheel. We were measuring horsepower at the wheels. Drivetrain loss can be significant depending on model.
Would replacing the stock air box with a K&N intake or a Fabspeed allow you to take better advantage of the plenum? Thinking the combination of the two may be larger than the sum of the plenum or airbox on their own.
How much is the part
Fantastic.
Need a decent handless microphone, it is 2020 after all.
Agree but it sure beats tons of ambient noise.
Wow all that coolant showering the engine is going to smell awesome for weeks to come 🤢
Hmm... not worth the money..
I broken the same ($%^&^%&) plastic part when I helped my neighbor fix his starter.
I hope you upgraded it to the metal aftermarket one. Mine failed after some work.... when I drove to dinner. I had to rig it to get home.
Mine broke while driving! Lots of steam and coolant loss. The tow cost more than the part and repair!
Looks like a lot of time and money for not a lot of gain. That's gonna be a no from me dawg.
Go buy a turbo engined car if you want big gains for no work.
I agree. Not worth the money.
251 whp 233 tq after 268whp 242 tq
those aren't the numbers at all.
Pretty nice gain for a NA car, add some headers and probably double the gain...but triple the cost!_!
I guess I slightly ambitious with my guesses lol.