How many of you guys are tracking your 991s ?
#31
Drifting
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Absolutely right. Tires do not get "greasy", that is a misnomer used by guys who haven't figured out this is what happens to all tires when they let the heat of hard use cause the tires to become over inflated. The best way of avoiding this is to check pressure immediately after each run and bleed out whatever it takes to get down to your ideal pressure, in your case 30.
#32
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#35
Drifting
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As for the Cayman, I had the stock PASM suspension.
#36
Rennlist Member
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My car has the regular PASM. As much as I appreciate the track friendly SPASM, I didn't like the ride quality around my pothole infested town so I specifically ordered PASM. No regrets.
I like your idea about tire upsizing in the front. I did that when I was tracking an E46 M3 and it helped a lot. I may try that when these tires burn out. I need to investigate sizes and tire availability. I'll probably get new ones over the winter.
Are MPSC2 and NT01 tires capable of driving distances to and from the track? And are they ok in the rain? I don't have any experience with either tire brand. It's always a compromise when I can't dedicate a tire for track only use. What I buy has to do everything.
I like your idea about tire upsizing in the front. I did that when I was tracking an E46 M3 and it helped a lot. I may try that when these tires burn out. I need to investigate sizes and tire availability. I'll probably get new ones over the winter.
Are MPSC2 and NT01 tires capable of driving distances to and from the track? And are they ok in the rain? I don't have any experience with either tire brand. It's always a compromise when I can't dedicate a tire for track only use. What I buy has to do everything.
I think the standard 991 front fender has plenty of clearance up front for 255 and maybe 265 (GT3RS runs that size, but that car has a widebody fender) as well, given how stretch the 245 tires are on the wheels with stock width and offset. Just FYI, euro cars typically have plenty of tire-to-fender clearance since TUV requires them to be able to safely fit a set of snow chains.
But you should measure how much clearance do you have between the tire and fender well liners at full steering locks as well. I torn up the oil cooler on my E92 once running oversized front tires.
Hope that helps. And if you have any videos of the thing on track, please share. Non-GT3 991 track videos are surprisingly hard to come by for whatever reasons.
#37
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I have the base, non adjustable suspension in my Cayman S. Car handles great, but I've heard the X73 suspension really transforms the car.
#40
Drifting
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I researched different tires to fit my 19" wheels and am disappointed that there is so little choice. The goal is to maintain as close as possible to the original rolling diameter and that is proving very difficult. I would love to get some Pilot Sport Cup 2's or similar but the sizes don't work out.
Does anyone know just exactly what variance of diameter is allowed?
Does anyone know just exactly what variance of diameter is allowed?
#41
Advanced
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1)going from MPSC2 to Trofeo R next, the needed stiffer coils for stickier tires are on the car now, and teh car sits lower than PASM as desired
2)went from PASM to home made SPASM using KW HAS kit (30% stuffer coils)and TPC bars, very happy at the track with it now; would LOVE a TPC 991S DSC next before trying out a JRZ setup on this car if that doesnt get me closer to what I want
3)running the Pagid rs29 pad and moving to girodisc next, braking is better with the pagids. no plans for a BBK
4) ordered monoballs from elephant racing, these will be nice on tarmac
5)running Tarrett 991 camber plates @ -2.7 front camber
2)went from PASM to home made SPASM using KW HAS kit (30% stuffer coils)and TPC bars, very happy at the track with it now; would LOVE a TPC 991S DSC next before trying out a JRZ setup on this car if that doesnt get me closer to what I want
3)running the Pagid rs29 pad and moving to girodisc next, braking is better with the pagids. no plans for a BBK
4) ordered monoballs from elephant racing, these will be nice on tarmac
5)running Tarrett 991 camber plates @ -2.7 front camber
#42
Drifting
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What size wheels and tires are you running? I am finding tire sizes that work with OEM spec wheels limited.
What benefits do you anticipate with the Girodisc? I can't get over the cost.
#44
Advanced
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Tires are key, dont waste any time with OE wheels and tires. I went with some inexpensive OZ stuff of tirerack, but if your budget allows for forged, do it! For me, having considered 19s, and not all fitting,I simply stayed with 20s, and found three tires I like alot:
-MPSC2 for street and track, just not the sticky icky I need on track
-DUNLOP Sport Race Maxx for track with some street possible, also usable wet
-Trofeo R a trackday monster
great question: Girodiscs are simply a lighter larger rotor retaining oe calipers. The OE brakes get over their head on hard hard braking before chicanes, ABS engages sooner than I like; where my buddy in his z28 out brakes me with his ccb. I want to try and have better modulation with the brakes so upping rotor size makes sense; however there is nothing available from AP/Essex for the 991S; they only have gt3 stuff so far but talking with Jeff Ritter it IS in the pipeline
I forgot-
1- My car is not Sport Chrono, so I added a Tarret supplied Transmission mount that does increase the nvh slightly but after a few days even wife got used to it, it does keep the entire driveline from moving as much in fast transitions, see link below
2-i'm on Torque 700 brake fluid and also use ATE gold and SRF in my garage
3-I've ordered Elephant Racing monoballs (ask for Chuck) and am considering his FEA designed cnc lower rear links, and would steer clear of the Agency copycat part, btw.
http://www.function-first.com/products/991
http://www.6speedonline.com/forums/9...che-991-a.html
http://www.tpcracing.com/cayman-boxs...uspension.html
http://www.rennsport-one.com/shop/pagid-rs-29-rear-991/
http://www.rennsport-one.com/shop/pagid-rs29-front-991/
https://rennlist.com/forums/997-gt2-...xx-race-2.html
in retrospective reconsideration I would also consider the Elephant kit which can be ordered with stiffer coils than the KW setup right off the bat, however u may also find a preference for 70mm ID coils as per same height of coil spring there is more winding than on a 2.5ID coil and hence, sometimes a better ride quality on softer springs, I suspect.
I cannot emphasize enough how much the TPC sways were a boon, pricey but worth it, and just as critical is the alignment, dont skimp here; I went to EVOMS who uses a Beissbarth; the front camber is essential, as is rear toe on this chassis. Dont be stingy on either
Next mods:
GMG Seat base and atleast a drivers trackday seat
#45
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I took my car to the track and had a horrible experience. The car itself was even better than I expected, but I was extremely disappointed with how the whole event was run and the (almost non existent) instruction either on or off the track. After that I don't know if I'll ever take my own car on the track again.
If you're planning on keeping the car for many years is taking it on the track once a year going to beat it up? Also will it wear out your brake and tires? How much should you expect to spend each time you go to the track?
If you're planning on keeping the car for many years is taking it on the track once a year going to beat it up? Also will it wear out your brake and tires? How much should you expect to spend each time you go to the track?