Quote:
Originally Posted by khcoaching
^^I used the ZLE front brakes mainly due to cost and keeping the stock look. APs would be amazing and the fact when driving at pace, the front pads last 3-4 days (max) there is merit to getting something that lasts longer. Weight wise, they are heavier, but I offset it with the Giro rotors which are the same as the stock SS 1LE.
The next steps are going to be interesting....I'm at the point where there are 3 paths to go:
1) More Grip
2) Aero
3) More HP
1) Grip - The next step will be a set go Hoosiers to see what they can do. I was thinking scrub slicks, but I find many times you don't know what you are getting and sizing is somewhat problematic. I don't many days with the car, so when I do go, I want to be sure I am not guessing about what tires I have.
2) Aero - I can't find real definitive info on how much this will improve, but based on some issues I am having, I think there is something here. The high speed stuff I drive, I can already run flat, so I am thinking more about the lower speed longer radius corners is where I need help. But, more grip I think will help this. (Until I just go faster and the same thing happens)
3) Power - Pandora's box here. But I would love to have another 100-125 rear wheel HP. I think this would be a massive equalizer, while still keeping the car friendly on exits.
There for sure is something also with weight, but not that much. Exhaust, seats, rear rotors is about all I would want to do.
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I get the cost factor and the stock brakes are really good on all 1LE cars. My problem is I get about 2 days (~10 to 14 x 25 min sessions, depending on the track) on a set of OEM pads before they need to be changed. Rotors will need to be changed min once a year so this gets pricey. At this point, I am still putting together a build plan and after doing research the AP racing 390mm Heavy Duty option looks like the best direction for my use case. As for your current dilemma, I'd ask... have you considered a lightweight flywheel from kaTech? According to the Engineer I spoke to at Katech this will drop ~24.5 lbs of rotating weight.
Roughly for each pound removed which is rotating at Engine speed, you realize + ~2.14 HP equivalent gain.
Back in 2019 I did this same thing (Alu swiss cheese FLWH) along with a six-puck clutch on my Turbo Boxer Flat Four daily driver/occasional track day car and dropped ~19lbs in the process. The little sucker revs out like a liter-class sportbike now.
To my surprise, it isn't horrible in stop and go traffic as some folks report. If you don't daily drive your SS 1LE this won't be applicable to you, but might be to anyone else going the dual-purpose route. However, this is of course subjective.
A side benefit is you will spend less time in each gear so you will definitely see a drop in your lap times at every track you go to. However, if you rely on engine braking you will certainly lose some or possibly most of this effect since the rotating mass is being reduced. And you will need to adjust your driving style a little to compensate.
Great build so far and very informative to watch your progress/restults, thank you!