APR tuned S4 vs. GIAC tuned S4…

primetime · December 8, 2019, 3:13pm

So Jeff and I finally hit the track today… Wanted to start by thanking him for driving down and making this happen… Not many folks would drive 4 hours just to race and test their car… We didn’t just race and it was nice to meet him and party a little on Friday, we had a good time talking cars and such… The AK47 and Pink are pretty good, eh? Thanks Jeff! You’re welcome at my place any time…

So about the races… We made a total of 5 passes, two hot lapped to start and then it got crowded and a few breaks so it got slow… Anyway, I won 5-0 in terms of actual races but he ran a better ET one time… Honestly, not what I was expecting but I’m very happy with my car… We used the same fuel(MS109) and both ran our 104 tune… He did NOT spray w/m on any pass… He did NOT use LC anytime and given his 60’s he doesn’t need it…

Mods:
Me - 2010 S4 – APR tune, pulley, CPS, 034 HFC’s, Miltek non-res exhaust, custom intake, Brembo BBK, JHM LW rear rotors, BBS CHR wheels, H&R sways, and Alu-Kruez

Jeff - 2012 S4 – GIAC tune, GIAC DSG tune, pulley, meth injection, Eurocode longtubes, AWE resonated exhaust, roc-euro intake, VMR wheels, ECS rotors, Eurocode USS setup, Alu-Kruez, H&R sports, and SPC adj. control arms (correct me if I’m wrong on any mods bud)

Conditions:
DA was between 450 – 850 for all passes… 44-48F, 53% - 44% humidity, and 30.04 – 29.94BP ranges… We both started with 36psi up front and 32 in the back… I dropped mine slightly not sure if he did or not?

First pass… My car hooked hard but then violently shuttered, I honestly thought I snapped something… I stayed in it and it was fine so I was relieved but the shutter hurt my ET IMO… I’ll post the vid in a little and you’ll see the camera shake hard… Anyway, I went 11.84 and Jeff went 12.34 as he spun bad…

Second pass… We hot lapped and both of us ran our bests… These cars love to hot lap and hate sitting trust me… Hooked good and went 11.72 and Jeff went 11.82… He killed me in the 60ft time 1.62 to my 1.67 but I was ahead by the 330 and maintained… He mentioned a few times how I pulled him in 2nd but we seemed more even after that…

Third pass… He out 60ft me again 1.65 to 1.67 but I think he had a hang-up shifting and I went 11.86 to his 12.09… We had to wait almost 1 hour before this pass and the car just doesn’t like that…

Fourth pass… I “won” the race but he ran a better ET which is all I care about… He killed me in the 60ft yet again 1.65 to 1.70. Had a slight hangup this race and it cost me, he went 11.90 to my 11.94…

Fifth pass… He out 60ft me yet again… 1.66 to 1.69 and I went 11.93 to his 11.96… We waited again an hour or so before this pass…

So all and all happy, would to have liked to set a record but it was too cold… Would have been better if it was sunny and a little warmer with a higher BP but it is what it is… Really shocked that he out 60ft me on every run but one and still lost… I’ll review both sets of logs and post some thoughts from those… I think these will shine some light on things in comparison to the tunes… He peaked at his and said he was making killer timing up top like 28-29 but bypassing 10% of his boost so that is hurting him IMO… I haven’t looked at mine yet… His car sounds really good with the headers, pretty loud on cold start…