Crown

Board: Porsche - 911 - 997 - Turbo Language: English Region: Worldwide Share/Save/Bookmark Close

Forum - Thread


    Re: The result of IPD Plenum + Exhaust

    Porschephile - Did I understand this correctly; this was referring to the difference of just the IPD plenum  -  "The overall improvement for my car across the whole power band is roughly 4-5%. At my level that is roughly 25 hp"



     

     

    Stradale,

    The graph above shows the effect of a 75mm IPD plenum and a 75mm throttle body added to a 996TT that previously was modded with EVOMS GT700 kit. The 4-5% improvement is an average increase in g forces measured on the performance box and calculated with their software. This data was run in July when my car had about 580 whp. Thus 4-5% of that would be roughly 25 whp. The graph shows only the effect of the plenum and throttle body. I believe it is more or less congruent with prior claims about the plenum.

    Here are some more data I collected at the time I installed plenum/TB This is a 60-100 or so with very similar atmospheric conditions. The blue line is GT700 alone and the red line is GT700+ plenum. The software is a little goofy and wont let me superimpose the runs exactly but if you look closely you can see that the plenum line starts at a lower speed but then accelerates past the non-plenum line. The green line is linear acceleration in gs of the plenum. The black line is linear acceleration of the non-plenum.60-100 compare GT700 vs. GT700 +plenum+TB.jpg

    Next I have a 60-130 mph done entirely in fourth gear to remove the variable of shifting. Again atmospheric conditions were as similar as possible. (Once summer hits in south Texas every day is almost identical to others ie hot and humid!!).  Again, the plenum is the red line and the nonplenum is the blue line. The software again wont let me line the runs up perfectly, but you can see the red line starts at slightly a lower speed and then passes the blue line by 130 mph (and keeps pulling away even above 130). You can see the pattern I described earlier here as well. The red line catches up to the blue line fairly early in the run then holds relatively even then pushes significantly ahead in the higher rpms. The actual time of the 60-130 runs was 7.37s for the plenum and 7.53s without the plenum/TB. Remember, this is a fourth gear ,no shift, run in heat and humidity.

    60-130 No shift GT700 plenumTB vs. GT700 alone (7.37 vs. 7.53).jpg

    In these last two graphs, the gains of the plenum are less. More along the lines of 2-3%. But you can still see the pattern in both graphs with greater power immediately after the turbos hit then laying back abit and finally a harder pull to the redline at the top.


    Re: The result of IPD Plenum + Exhaust

    porschephile1:
    Porschephile - Did I understand this correctly; this was referring to the difference of just the IPD plenum  -  "The overall improvement for my car across the whole power band is roughly 4-5%. At my level that is roughly 25 hp"



     

     

    Stradale,

    The graph above shows the effect of a 75mm IPD plenum and a 75mm throttle body added to a 996TT that previously was modded with EVOMS GT700 kit. The 4-5% improvement is an average increase in g forces measured on the performance box and calculated with their software. This data was run in July when my car had about 580 whp. Thus 4-5% of that would be roughly 25 whp. The graph shows only the effect of the plenum and throttle body. I believe it is more or less congruent with prior claims about the plenum.

    Here are some more data I collected at the time I installed plenum/TB This is a 60-100 or so with very similar atmospheric conditions. The blue line is GT700 alone and the red line is GT700+ plenum. The software is a little goofy and wont let me superimpose the runs exactly but if you look closely you can see that the plenum line starts at a lower speed but then accelerates past the non-plenum line. The green line is linear acceleration in gs of the plenum. The black line is linear acceleration of the non-plenum.60-100 compare GT700 vs. GT700 +plenum+TB.jpg

    Next I have a 60-130 mph done entirely in fourth gear to remove the variable of shifting. Again atmospheric conditions were as similar as possible. (Once summer hits in south Texas every day is almost identical to others ie hot and humid!!).  Again, the plenum is the red line and the nonplenum is the blue line. The software again wont let me line the runs up perfectly, but you can see the red line starts at slightly a lower speed and then passes the blue line by 130 mph (and keeps pulling away even above 130). You can see the pattern I described earlier here as well. The red line catches up to the blue line fairly early in the run then holds relatively even then pushes significantly ahead in the higher rpms. The actual time of the 60-130 runs was 7.37s for the plenum and 7.53s without the plenum/TB. Remember, this is a fourth gear ,no shift, run in heat and humidity.

    60-130 No shift GT700 plenumTB vs. GT700 alone (7.37 vs. 7.53).jpg

    In these last two graphs, the gains of the plenum are less. More along the lines of 2-3%. But you can still see the pattern in both graphs with greater power immediately after the turbos hit then laying back abit and finally a harder pull to the redline at the top.

     

    Thanks so much for the detailed explanation. It's really interesting to see.

    Just noticed eclou  had posted a 997 Turbo EVOMS 700 IPD plenum dyno earlier in the thread. All this mod talk had me researching kits last night, looking forward to it one day.    

    997TurboDynoSheetfromEVOMS.jpg


    --

    08 PORSCHE Turbo Cabriolet, 06 Ferrari F430,  04 Durango HEMI,  04 Harley Davidson Screamin Eagle,  93 Harley Davidson Nostalgia


     
    Edit

    Forum

    Board Subject Last post Rating Views Replies
    Porsche Sticky SUN'S LAST RUN TO WILSON, WY - 991 C2S CAB LIFE, END OF AN ERA (Part I) Thread Closed 9/24/20 12:47 AM
    watt
    586579 2849
    Porsche Sticky The moment I've been waiting for... 12/30/20 9:03 AM
    rhino
     
     
     
     
     
    359350 1279
    Porsche Sticky OFFICIAL: New Porsche 911 Turbo S (2020) 4/10/21 2:32 PM
    Joost
    87139 1085
    Porsche Sticky Welcome to Rennteam: Cars and Coffee... (photos) 5/12/21 3:30 PM
    WhoopsyM
    45570 344
    Porsche Sticky ROAD TEST: New 992 Carrera 4S 3/3/21 10:57 PM
    Wonderbar
    35715 336
    Porsche Sticky Porsche Taycan Turbo S - Short Review 10/19/20 6:12 PM
    Leawood911
    33583 380
    Porsche Sticky SUN'S LAST RUN TO WILSON, WY - 991 C2S CAB LIFE, END OF AN ERA (Part II) 5/11/21 3:34 PM
    watt
    17035 344
    Porsche Sticky Porsche extends the Taycan model range (Taycan 2WD) 2/1/21 12:42 PM
    Leawood911
    4750 29
    Porsche OFFICIAL: New 991.2 GT3 (2017) 7/27/20 2:13 AM
    DJM48
    566893 5257
    Porsche Cayman GT4 5/4/21 4:46 PM
    Topspeed
    408681 3586
    McLaren McLaren on a winning streak 4/25/21 4:04 PM
    Topspeed
    359040 3916
    Porsche OFFICIAL: 911 GT2 RS (2017) 4/29/21 7:24 AM
    GnilM
    356646 3494
    Porsche OFFICIAL: 991.2 GT3 RS (2018) 4/28/21 12:26 PM
    W8MM
    318373 3252
    Porsche OFFICIAL: 911 R (2016) 12/8/20 7:51 PM
    DJM48
    310354 2646
    Porsche OFFICIAL: The new Porsche 992 – a design icon and high-tech sports car 2/28/21 8:05 PM
    Topspeed
    219333 1542
    Porsche Tesla Roadster 9/23/20 8:22 PM
    bluelines
    197540 4279
    Porsche OFFICIAL: New Panamera (2016) 2/11/21 9:22 AM
    Itsme
    161457 1379
    Others Alfa Romeo 4C 9/23/20 10:22 AM
    RCA
    138368 792
    Porsche 992 GT3 5/18/21 11:19 PM
    xpto
    123334 2376
    Lambo Lamborghini Huracan and variants 4/9/21 4:32 PM
    Topspeed
    107018 1225
    McLaren F1 2/25/21 11:33 AM
    RCA
    77421 207
    Porsche Welcome to the new Taycan Forum! 5/18/21 6:01 PM
    WhoopsyM
    71585 1164
    AMG AMG GT R 11/19/20 11:47 PM
    Topspeed
    65244 819
    Lambo Aventador and SV 4/20/21 3:21 PM
    CGX car nut
    64306 683
    Porsche 991 Speedster 9/3/20 4:29 PM
    Topspeed
    57755 878
    Porsche Nürburgring - Tesla vs. Taycan 11/23/20 6:10 PM
    Topspeed
    43594 596
    Others Bugatti Chiron 4/12/21 3:42 PM
    RCA
    36782 476
    Porsche Olive 991.2 GT3 Clubsport 1/1/21 7:58 PM
    throt
    34279 615
    Ferrari Ferrari 812 Superfast 5/19/21 3:20 AM
    mcdelaug
    31571 487
    BMW M BMW M2 Rumors 3/21/21 5:01 PM
    Topspeed
    28878 385
    273 items found, displaying 1 to 30.