What did you do to your GT4 today?
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07-31-2022 | 11:39 PM
#2769
Rennlist Member
Joined: Jun 2015
Posts: 3,612
Likes: 673
Curious if you worked with John G on all of those goodies. Mind sharing what specifically you did (looks like there's more than meets the...ear) and approximate cost? Thanks so much.
08-01-2022 | 12:51 AM
#2770
Track Day
Joined: Jul 2022
Posts: 16
Likes: 20
From: Philadelphia
It was $6550 for everything from Soul which includes headers, IPD plenum, 82mm throttle body, Softronics tune, X pipe, titanium tips and air filters.
I also did ARP exhaust studs, new spark plugs and new gaskets while I was in there. (not included in that cost)
If you want to cut costs, I think just the headers and tune would get 90% of the effect for about $4900.
People argue about if the IPD plenum really does much but I went with it to replicate THIS known good setup that makes 10NM more torque than a 2022 GT3RS. It also makes sense that if I open the flow up exhaust side, I should balance that a bit intake side.
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Dpmarc (08-01-2022)
08-01-2022 | 01:06 AM
#2772
Track Day
Joined: Jul 2022
Posts: 16
Likes: 20
From: Philadelphia
I haven't gotten my tune from Softronics yet since I just sent them my ECU file yesterday. Since it's still on the stock tune I haven't given it 100% throttle yet and also haven't gone above 5-6k or so.
I know the stock ECU is good enough to adapt, but still, I'd rather not push it until the tune is flashed, will update then with some measurements from Dragy.
All I can say now is it sounds (more) amazing and even on the stock ECU was smooth all over, no stumbles from the larger throttle body. Put about 70 miles on it since and no CEL.
Oh and not that we care about this much here but I found it pretty amazing I got 29mpg on a 1 hour highway drive after installing these lol. Not bad for a 400HP+ "racecar"!
I know the stock ECU is good enough to adapt, but still, I'd rather not push it until the tune is flashed, will update then with some measurements from Dragy.
All I can say now is it sounds (more) amazing and even on the stock ECU was smooth all over, no stumbles from the larger throttle body. Put about 70 miles on it since and no CEL.
Oh and not that we care about this much here but I found it pretty amazing I got 29mpg on a 1 hour highway drive after installing these lol. Not bad for a 400HP+ "racecar"!
Last edited by LuckyX222; 08-01-2022 at 01:12 AM.
08-04-2022 | 10:27 PM
#2773
Rennlist Member
Joined: May 2020
Posts: 382
Likes: 167
From: Phoenix, AZ
- A few rehab/upgrade items on a 2016 981 GT4
- Tarett Front Droplinks (OEM were bent)
- Tarett Rear Droplinks (OEM were bent)
- Tarett Monoboll control arm ends
- Tarett Locking Plate Kit for Rear Toe Links
- Tarett/Wevo Semi Solid Transmission Mounts
- Front Left Wheel liner housing (original one was damaged)
- Bilt Racing Service BRS Billet 2.5 QT Deep Sump Oil Pan Kit
- Bilstein Clubsport coilovers
- Zunsport engine side scoop grilles (prevents track debris from fouling the engine cooling fans)
Last edited by Scott O'Connor; 08-07-2022 at 02:32 PM.
08-07-2022 | 06:03 PM
#2775
Track Day
Joined: Jul 2022
Posts: 16
Likes: 20
From: Philadelphia
I got the tune applied and got some clips 
Not sure how to embed on here...
Exhaust sounds
Feels real nice, I think actually the thing I notice most is throttle response/tip-in. I find I need to be more delicate with my foot around the city because it comes on sharper now.
Not sure how to embed on here...Exhaust sounds
Feels real nice, I think actually the thing I notice most is throttle response/tip-in. I find I need to be more delicate with my foot around the city because it comes on sharper now.