IPD plenum on a GT4
Thread Starter
Instructor
Joined: Nov 2012
Posts: 100
Likes: 1
From: Germany
IPD plenum on a GT4
I spoke to the IPD guys for the plenum of the GT4 . They told me that some
owners have already installed it and have been testing . All they can say to
me is that the feedback is very positive . A performance gain of 15-20 hp at the
rear wheels was seen on other caymans and carerras . But still not a dyno available on GT4.
Has anyone from here guys tryed the IPD plenum on his GT4 ? I am planing
to order it soon and i want to know if anyone has done it already . Combined
with a Cobb must unlock at least 30hp . If someone tryed IPD or Cobb please
let us know.
owners have already installed it and have been testing . All they can say to
me is that the feedback is very positive . A performance gain of 15-20 hp at the
rear wheels was seen on other caymans and carerras . But still not a dyno available on GT4.
Has anyone from here guys tryed the IPD plenum on his GT4 ? I am planing
to order it soon and i want to know if anyone has done it already . Combined
with a Cobb must unlock at least 30hp . If someone tryed IPD or Cobb please
let us know.
Race Director
Joined: May 2013
Posts: 10,235
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From: Hypercar Invitational
Does plenum require an upgraded chip like a Cobb accessport to make car run properly? Can dealer tell that it is there if they don't open the engine cover just by attaching their computer to the obd?
Thread Starter
Instructor
Joined: Nov 2012
Posts: 100
Likes: 1
From: Germany
believe so? We need someone who has tryed it on a GT4.
If someone knows from installed example please let us know.
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I have just been hesitant to tell anyone that adding the larger 82mm plenum would be 100% successful until I did it to our car and then drove it without issue. It could be that more air for the GTS and S tipped the scales and might not for the GT4 but I'm just advising folks that it could happen because I know how frustrating it is to have a CEL. We have dyno tested this upgrade in Germany on the GT4 already by itself without the flash and then with the flash. There is power to be gained with this upgrade and for that reason we include it in our Stage 1 and Stage 2 415HP and 430HP packages.
Burning Brakes
Joined: Jun 2003
Posts: 1,223
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From: 1 hour from Lime Rock Park
John @ BGB can you update this thread with the latest info as it relates to the IPD plenum, 82mm TB, Cobb tuning and CELs?
Plenty has changed since 2015, but a lot of that info has become buried in other threads or gotten mixed in with exhaust related CELs and tuning etc.
Thank you!
Plenty has changed since 2015, but a lot of that info has become buried in other threads or gotten mixed in with exhaust related CELs and tuning etc.
Thank you!
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Mine did not throw a CEL on a factory tune....but it required some sort of calibration via PIWIS (not the typical TB adaptation) that COBB walked my shop through. Cobb has added a feature that is supposed to suppress/work around the implausible minimum flow error caused by the 82mm TB in their tunes.
Racer
Joined: Mar 2013
Posts: 383
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Mine did not throw a CEL on a factory tune....but it required some sort of calibration via PIWIS (not the typical TB adaptation) that COBB walked my shop through. Cobb has added a feature that is supposed to suppress/work around the implausible minimum flow error caused by the 82mm TB in their tunes.
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The problem I have is a throttle decay issue that seems to be triggered by high RPM rev matching (or just free-revving). When I rev match, I over-rev, and then time the clutch release to match the revs of the downshift. I do this fairly early and get into the lower gear fairly early because I like the engine braking feel and stability when slowing into a corner. Many people do the matching/shifting at the very end of braking/during trail braking - unlikely to see the issue.
I'm going to play around at COTA this weekend with the auto-match to see if it happens with the nannies in control.
Last edited by ShakeNBake; May 5, 2016 at 03:59 PM.
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From: Midwest
^ I am in agreement with you as well. I am going to talk to the Master Mechanic at my Dealership this weekend and just be blunt what I am thinking of doing and if he can advise me. He is pretty cool and they have been good w/mods
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From: Midwest
Mine did not throw a CEL on a factory tune....but it required some sort of calibration via PIWIS (not the typical TB adaptation) that COBB walked my shop through. Cobb has added a feature that is supposed to suppress/work around the implausible minimum flow error caused by the 82mm TB in their tunes.