Track days: Mod my MkV, or, get a new car?

[SuperSkyline89]

They're fine, you won't have any problems

I don't know about theoretical lap times but as far as the Porsche goes I agree with flat tire, a stock Cayman will embarass a modified GTI. It's the most balanced Porsche and it's built to do this kind of thing.

 

[flat tire]

For real. You're considering buying a Porsche and you made this thread? Stop the madness, and just buy the Porsche.

Pressure / stiff sidewalls will keep your fronts from running too far towards the sidewall but you need a lot more neg camber to make those tires happy under cornering.

 

[bostonaudi]

For real. You're considering buying a Porsche and you made this thread? Stop the madness, and just buy the Porsche.

Pressure / stiff sidewalls will keep your fronts from running too far towards the sidewall but you need a lot more neg camber to make those tires happy under cornering.

The newest gen Cayman's and Boxsters are both very capable right off the showroom floor, an instructor friend consistently out ran me with a 2014 BASE Boxster (not even an S), and I'm reasonably quick in my E36 M3.

 

[g60_corrado_91]

You need to recode the brakes with VCDS as well to remove / reduce the stop assist. There are a few threads here if you search

I searched for "stop assist," "VCDS brakes," "coding brakes" and couldn't find anything.

Can you point me to a thread or elaborate if you know how to do this?

 

[clockwise33]

Signed up for an autox this weekend and I'll see how I feel after ;-). Got an oil change and will play with tire pressure.

Also, picked up a OBDII device and downloaded Torque on my phone. One of these evenings, I'm gonna find an open stretch of road and record the hp/0-60/boost on stage 0/1 just to figure out what I've got.

Finally, -IF- I were to upgrade, I'm leaning towards a 2009+ (987.2) Cayman S. Fits my preference of an understated, nimble, light, sports car. Most of the depreciation is paid for already, so it's probably cheaper to own over 5 yrs than, say, a new-ish S3 or Mustang GT or something.. Open to better suggestions but I'm guessing that's for another thread .

Also, this is the best apples-to-apples comparison I've found for different cars on the track: http://www.caranddriver.com/feature...results-historical-lap-times-and-more-feature

Golf R: 3:12
MkVII 3:14
MkVI: 3:19
R32: 3:21
MkV: 3:25 (ouch)
2009 Cayman S: 3:05

If you presume a 3:25 baseline for the MkV, if I added the above mods, what would you guess that would do to laptimes (professional driver)?

I've always been astonished by the fact that the 2008 Chevy Cobalt SS-TC was able to put down a 3.13 on the C&D Lightning lap. Embarrassed quite a few cars - 135i, Lexus IS-F, Evo X MR, S2000, Elise, G37, STI.

Reading the spec sheet, nothing about the Cobalt looks remarkable. 2950 lbs, 225 summer tires, 260hp, FWD w/ LSD. MKV GTI is 100 lbs heavier, but has IRS instead of twist beam rear axle of Colbalt. Not sure why it would be impossible for a MKV with some extra power (K04?) to circle VIR in the same ball park as a stock Colbalt.

 

[g60_corrado_91]

I've always been astonished by the fact that the 2008 Chevy Cobalt SS-TC was able to put down a 3.13 on the C&D Lightning lap. Embarrassed quite a few cars - 135i, Lexus IS-F, Evo X MR, S2000, Elise, G37, STI.

Reading the spec sheet, nothing about the Cobalt looks remarkable. 2950 lbs, 225 summer tires, 260hp, FWD w/ LSD. MKV GTI is 100 lbs heavier, but has IRS instead of twist beam rear axle of Colbalt. Not sure why it would be impossible for a MKV with some extra power (K04?) to circle VIR in the same ball park as a stock Colbalt.

I use to be a porter at a Chevrolet dealership and got to experience a couple of the Turbalts, as I call them. Compared to the SC'd Cobalt SS, they're way more refined. It's hard to explain but I've driven both. That 2.0T is a monster of an engine. I actually believe it's based off the Saab 2.0T, just with DI and the KO4 turbo (different version KO4 than the OEM S3/Golf R KO4). A base Pkg 0 GTI is actually 3150lbs, so it's 200lbs right off the bat difference. Add in the optional mechanical LSD and the 4 piston Brembo front brakes (12.4" after doing a quick search), and it's no surprise to me about its time. I actually think it was pretty remarkable of a car for being a Cobalt that was pretty much on its last leg.

Yes, a Stg 2 stock turbo MkV or KO4 MkV would hang in there, but I'll bet it's more fun in the stock Turbalt with the LSD and better braking. Weight makes such a huge difference in the fun to drive factor. I've discovered that after daily driving my 2015 Mazda 3 HB iSport 6MT that weighs 2850lbs and throwing some light Enkei wheels on it. More than 300lbs lighter of a car than my GTI...

 

[Das Gespenst]

And that's why my track mkv is getting stripped lol. Saved ~80lbs with the bride seats alone lol.

 

[g60_corrado_91]

And that's why my track mkv is getting stripped lol. Saved ~80lbs with the bride seats alone lol.

My buddy is selling Sparco Spirit seats for a steal, but I just ordered the LSD and need to order the Tyrolsport Deadset subframe bushing kit and H&R FSB still just to get it back up and running properly.

#transmissionbuddies :lol:

 

[clockwise33]

I use to be a porter at a Chevrolet dealership and got to experience a couple of the Turbalts, as I call them. Compared to the SC'd Cobalt SS, they're way more refined. It's hard to explain but I've driven both. That 2.0T is a monster of an engine. I actually believe it's based off the Saab 2.0T, just with DI and the KO4 turbo (different version KO4 than the OEM S3/Golf R KO4). A base Pkg 0 GTI is actually 3150lbs, so it's 200lbs right off the bat difference. Add in the optional mechanical LSD and the 4 piston Brembo front brakes (12.4" after doing a quick search), and it's no surprise to me about its time. I actually think it was pretty remarkable of a car for being a Cobalt that was pretty much on its last leg.

Yes, a Stg 2 stock turbo MkV or KO4 MkV would hang in there, but I'll bet it's more fun in the stock Turbalt with the LSD and better braking. Weight makes such a huge difference in the fun to drive factor. I've discovered that after daily driving my 2015 Mazda 3 HB iSport 6MT that weighs 2850lbs and throwing some light Enkei wheels on it. More than 300lbs lighter of a car than my GTI...

I've had my 2 door 6MT package 2 on a certified truck scale and it came up 3050. I know truck scales aren't the best method, but I stood on the scale afterwards and it got my body weight within about 3lbs

I've seen people online report 2 door 6MT weighing on scales between 3050 and 3100. According to VW 4 door adds 62lbs and DSG adds another 51lbs.

 

[g60_corrado_91]

I've had my 2 door 6MT package 2 on a certified truck scale and it came up 3050. I know truck scales aren't the best method, but I stood on the scale afterwards and it got my body weight within about 3lbs

I've seen people online report 2 door 6MT weighing on scales between 3050 and 3100. According to VW 4 door adds 62lbs and DSG adds another 51lbs.

Wow no shit. Well, VW advertises 3150 for a Pkg 0 2 door 6MT, so clearly that's off. In that case, my 2006 2 door 6MT Pkg 1 is probably 3000-3020lbs (cloth being lighter than leather). I should weigh mine now. If my car is really 3000ish lbs, then my buddies Evo X GSR with almost full bolt on's and a Cobb OTS tune pulling me pretty hard from a roll is all the more disappointing. :frown:

 

[clockwise33]

Wow no shit. Well, VW advertises 3150 for a Pkg 0 2 door 6MT, so clearly that's off. In that case, my 2006 2 door 6MT Pkg 1 is probably 3000-3020lbs (cloth being lighter than leather). I should weigh mine now. If my car is really 3000ish lbs, then my buddies Evo X GSR with almost full bolt on's and a Cobb OTS tune pulling me pretty hard from a roll is all the more disappointing. :frown:

Have you done logs lately? Is your car running well?

 

[g60_corrado_91]

Car and Driver tested a 2007 Pkg 2 4 door GTI with a 6MT, so technically 62lbs more than our two doors. Still, at 3155, that's like saying the 2 door should weigh 3100ish like you said. That's with the 29lb Huff wheels too; the Classix of 2006 and 2007 weighed 23lbs, so 24lbs savings on a car without Huffs.

What's done to your GTI wheel wise? I bet your exhaust is lighter. My full 3" catless TBE is probably 30-40lbs lighter, I have slightly less weight with the single mass flywheel, rear seats out, but 25lb Q5 wheels with ZII (heavy) tires.

http://www.caranddriver.com/comparisons/2007-volkswagen-gti-page-5

Specifically, look at the first two links here:

http://media.caranddriver.com/files/2007-volkswagen-gti0705-vwgti-comparo-ts.pdf

http://media.caranddriver.com/files...-3-grand-touring0705-powertoys-vehicle-ss.pdf

http://media.caranddriver.com/files...-3-grand-touring0705-powertoys-chassis-ss.pdf

http://media.caranddriver.com/files...grand-touring0705-powertoys-powertrain-ss.pdf

http://media.caranddriver.com/files...and-touring0705-powertoys-finalresults-ss.pdf

 

[g60_corrado_91]

Have you done logs lately? Is your car running well?

Not really happy with Unitronic. I have a lot of driveability issues when not going WOT in boost. It's not smooth. I've tried working with them and just haven't had much luck. When I drove it in the winter, it'd throw lean codes too. Newer front and rear O2 sensors, new MAF, tried unplugging the MAF, no change. I've talked to another guy with a similar KO4 FSI running Unitronic on a B7 A4 with the same lean codes too and he went through just as much troubleshooting. My car has been down since October after taking out 3rd and 4th gear at the drag strip. I've done leak tests and boost wise, it's 23lbs and holds about 18.5psi at 7000rpm.

I actually hit my best 1/4 mile the first run on that night, a 13.6@107.8. Not a bad speed, but yeah, Evo X's with the mods my buddy has hit between 315-330awhp (Mustang dyno) and are low 12's at 110-113mph.

I was kind of disappointed too because I went with some Focus ST guys and this one guy with just a protune, TBE, and stock IC at the time (60 degrees out) was trapping 105mph, ON A KO3 turbo. I need to get a custom tailored tune, but I need to get my car back up and running first.

 

[clockwise33]

Car and Driver tested a 2007 Pkg 2 4 door GTI with a 6MT, so technically 62lbs more than our two doors. Still, at 3155, that's like saying the 2 door should weigh 3100ish like you said. That's with the 29lb Huff wheels too; the Classix of 2006 and 2007 weighed 23lbs, so 24lbs savings on a car without Huffs.

What's done to your GTI wheel wise? I bet your exhaust is lighter. My full 3" catless TBE is probably 30-40lbs lighter, I have slightly less weight with the single mass flywheel, rear seats out, but 25lb Q5 wheels with ZII (heavy) tires.

http://www.caranddriver.com/comparisons/2007-volkswagen-gti-page-5

Specifically, look at the first two links here:

http://media.caranddriver.com/files/2007-volkswagen-gti0705-vwgti-comparo-ts.pdf

http://media.caranddriver.com/files...-3-grand-touring0705-powertoys-vehicle-ss.pdf

http://media.caranddriver.com/files...-3-grand-touring0705-powertoys-chassis-ss.pdf

http://media.caranddriver.com/files...grand-touring0705-powertoys-powertrain-ss.pdf

http://media.caranddriver.com/files...and-touring0705-powertoys-finalresults-ss.pdf

At the time I weighed it my only mods were DG springs and BBS CO 18x8 which I have read weigh about 23lbs.

 

[g60_corrado_91]

Gotcha, well, that's pretty cool then.