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Yeah, it's been a great starting point. My car is 80% track / 20% street give or take, which is why I've not elected to get the Tarret Swift spring kit (yet anyway...). I hadn't considered the reinforcement plates... I should check those out.
Yeah, it's been a great starting point. My car is 80% track / 20% street give or take, which is why I've not elected to get the Tarret Swift spring kit (yet anyway...). I hadn't considered the reinforcement plates... I should check those out.
Here's the alignment I've been running with ... so far 1 day at Laguna Seca, and 1 day at Thunderhill.
Tire wear has been pretty even, but I'm also not pushing TOO hard just yet. I'm coming from a 911, and on top of that this is my first manual car in about 7 years.
Hardware modifications to hit this are:
- TPC Offset toe links
- RSS Caster pucks
- Additional shims
I'm also running a DSC Sport Controller. I had my 991 DSC controller reprogrammed for 718, and I'm using the 981 GT4 w/ Offset Toe Link Calibration. I'm hoping to do some modifications to the calibration after I'm more familiar and comfortable with the car.
Aero set to track front and back.
So far it's pretty good! There's still a good amount of understeer, and so next time out I'll put the rear sway bar to full stiff. I'm going to keep the front bar on medium because the front springs in this car are pretty soft (257 if I recall). I also plan to lower the car just a bit (10mm?) and install a DBJ Front axel lift kit (sitting in my garage actually... just need to find the time to install it). I may also do spherical LCA inners on the rear, depending on how planted the rear end of the car is as I get a little faster driving it (just to match the solid bearings of the toe arm).
With 2.5 degr front camber you still had "good amount" of understeer? WOW, i wouldn't expect that.
And TOE numbers are also look good.
You say both sway are currently set the same?
The TPC offset rear toe endlinks work on 718?
I ran out of rear toe adjustment and was thinking about those....
With 2.5 degr front camber you still had "good amount" of understeer? WOW, i wouldn't expect that.
And TOE numbers are also look good.
You say both sway are currently set the same?
The TPC offset rear toe endlinks work on 718?
I ran out of rear toe adjustment and was thinking about those....
Yeah. The front tires are significantly less wide than rear, at least that’s my theory as to the car’s tendencies. It by no means makes it less capable, I’m just pretty sure it can be dialed out further.
I have both bars on factory “middle” setting. I’ll be tightening the rear bar next time I get the car up.
The suspension is basically the same as the 981, so yeah the TPC offset links work great! My car didn’t really have any sloppiness under hard braking etc (also credit due to the DSC Sport controller !)
so next time: stuff rear sway bar, I’ll play with tire pressures a bit too.
min the future: solid bearing rear LCA inners, and start playing with the DSC settings a little.
Results:
I'll be tracking this Friday so i would be able to tell.
Out of the shop with cold tires the car was oversteery like crazy. Really got my confidence ruined.
Later on the road it wasn't bad but i didn't push too much as i still was scared
Will see how it goes from here.
Perhaps no other way bu adding more rear camber and adjustable rear toe links...
So i've been at the track.
The car dives in to the turn like crazy - this is awesome.
Of course it can understeer if driven too brutal - but driven sensibly it's absolutely fine.
The rear end is twitchy - the stock rear end confidence is gone, absolutely not there.
I would like to get some if it back - thinking about a bit more rear toe.
But for this aftermarket toe links are required. With them i'll have a freedom to add more shims at the rear to gain some 0.25 degr.
All of this i assume will calm the rear end. An hopefully the front end still will be happy.
Here is the footage (make sure you watch it in 1080)
Camber 2 degr and 10 minutes is not that small IMO.
It's not 2.75 or 3 of course.
I monitor air pressures, tire temps and wear very closely.
The shoulder wear is actually pretty OK.
Those Dunlops have shoulder wear marks very deep - a bit unusual to me.
How hard i'm pushing - the indication might be tire squeals (somewhat hard to hear but possible) and G-Meter - this is from phone app so i can't say how reliable it's in absolute terms but "relatively" i think it can be trusted to compare corners.
Laps 1,2 and 6 are fast ones.
Yeah. The front tires are significantly less wide than rear, at least that’s my theory as to the car’s tendencies. It by no means makes it less capable, I’m just pretty sure it can be dialed out further.
I have both bars on factory “middle” setting. I’ll be tightening the rear bar next time I get the car up.
The suspension is basically the same as the 981, so yeah the TPC offset links work great! My car didn’t really have any sloppiness under hard braking etc (also credit due to the DSC Sport controller !)
so next time: stuff rear sway bar, I’ll play with tire pressures a bit too.
min the future: solid bearing rear LCA inners, and start playing with the DSC settings a little.
One of the best upgrades for the track is to get a set of wheel that are 9" wide upfront.....the OEM are 8.5" (GT3 are 9"). This and coupled with a 255 or 2665 tire helps a lot with the understeer issue.
Good to hear finally the TPC toe links are 100% compatible, going for those again (+DSC) on the 718 GT4 but will add a bit more pieces to the suspension from Tarrett this time.
One of the best upgrades for the track is to get a set of wheel that are 9" wide upfront.....the OEM are 8.5" (GT3 are 9"). This and coupled with a 255 or 2665 tire helps a lot with the understeer issue.
Good to hear finally the TPC toe links are 100% compatible, going for those again (+DSC) on the 718 GT4 but will add a bit more pieces to the suspension from Tarrett this time.
I'm currently shopping around for a set with 9" up front and they're either hard to come by or very expensive. It's a lot cheaper to stay with 8.5 wheels up front and pinch a 255 in there.
After a whole weekend of searching I'm coming to the conclusion that the good old OZ Leggera HLT and RE-71R setup is still the best bang for your buck. I had that setup on my 981 GT4 and it worked well. Anything wider will follow the laws of diminishing returns. I'm contemplating the R-888R in 245/35R19 and 295/30R19 setup also as it's not much more expensive. I tried those tires last year and absolutely loved them on my 991.2.
My current setup is:
-2.5 front, 1mm toe out per wheel
-2.0 rear 2mm toe in per wheel
Toe links
5mm lower ride
front sway middle
rear sway stiff
Stock MPSC2 N1
I'm currently shopping around for a set with 9" up front and they're either hard to come by or very expensive. It's a lot cheaper to stay with 8.5 wheels up front and pinch a 255 in there.
After a whole weekend of searching I'm coming to the conclusion that the good old OZ Leggera HLT and RE-71R setup is still the best bang for your buck. I had that setup on my 981 GT4 and it worked well. Anything wider will follow the laws of diminishing returns. I'm contemplating the R-888R in 245/35R19 and 295/30R19 setup also as it's not much more expensive. I tried those tires last year and absolutely loved them on my 991.2.
My current setup is:
-2.5 front, 1mm toe out per wheel
-2.0 rear 2mm toe in per wheel
Toe links
5mm lower ride
front sway middle
rear sway stiff
Stock MPSC2 N1
Will report back after my next track day
that sounds like a great set up. Should be pretty good !
08-27-2020 | 12:25 PM
