Boxster 986 Autocross/Track Setup

[BrantyB]

Originally Posted by maytag

Explain? Ya lost me.

Sent from my SM-G970U using Tapatalk

To fit the 4" pulley you'll have to shave off part of the TDC (top dead centre) boss which is a hollow alloy protrusion cast into the crankcase. It is used to fit a TDC rod when locking the camshafts as part of the IMS replacement procedure.

That is my understanding.

[maytag]

Originally Posted by BrantyB

To fit the 4" pulley you'll have to shave off part of the TDC (top dead centre) boss which is a hollow alloy protrusion cast into the crankcase. It is used to fit a TDC rod when locking the camshafts as part of the IMS replacement procedure.

That is my understanding.

aaah, yes, this is true. Thanks for helping me connect the dots, hehe.

However, at least in my case, enough remains of the 'boss to still use the pin. Regardless; there are other means of finding TDC, and locking the crank, if IMS replacement is desired. But a "fancy-pants" shop may not be willing to work outside-the-box like that. So consideration might be appropriate.

[lawren]

Still hoping to get an answer to the following questions:

1. Should i do a front or rear adjustable sway bar with stock shocks/struts? Or should i do both? Or should i do neither?
2. Will 235 fit on front or is 225 the max with LCAs and stock struts?

[thstone]

Originally Posted by lawren

Still hoping to get an answer to the following questions:

1. Should i do a front or rear adjustable sway bar with stock shocks/struts? Or should i do both? Or should i do neither?

Do both. The staggered tire setup's will definitely tend towards understeer. The adj sways will help you balance the handling by dialing out some of that understeer.

Originally Posted by lawren

2. Will 235 fit on front or is 225 the max with LCAs and stock struts?

235 should fit on the front with both the 7" and the 8.5" wheel.

[Topless]

Originally Posted by lawren

Still hoping to get an answer to the following questions:

1. Should i do a front or rear adjustable sway bar with stock shocks/struts? Or should i do both? Or should i do neither?
2. Will 235 fit on front or is 225 the max with LCAs and stock struts?

I ran 255/255 square for a year on stock struts and 8.5/17" wheels. They will fit. If you roll the fenders you can mount 285/285 square.

[lawren]

I have my first autocross and track day of the season in a few weeks. I was wondering if someone could give me some tire pressure recommendations. This is the setup that I will be starting out with:

Car
1998 Boxster Base Model (2.5L)
Manual with Aero Package

SCCA Autocross STR Class Setup:
Stock 17"x 7" fronts and 17"x 8.5" rear wheels
Bridgestone RE71Rs (225/45-17 front & 255/40-17 rear)
Front LCA (this is my only suspension mod at this point)
Carbotech xp8 brake pads (or should I stick with stock for autocross?)

Track Setup (same as above with following additions/changes):
OZ 18"x8.5" fronts and 18"x10" rear wheels
Toyo R888Rs (235/45-18 front & 265/35-18 Rear)

[lawren]

I have my first autocross and track day of the season in a few weeks. I was wondering if someone could give me some tire pressure recommendations. This is the setup that I will be starting out with:

Car
1998 Boxster Base Model (2.5L)
Manual with Aero Package

SCCA Autocross STR Class Setup:
Stock 17"x 7" fronts and 17"x 8.5" rear wheels
Bridgestone RE71Rs (225/45-17 front & 255/40-17 rear)
Front LCA (this is my only suspension mod at this point)
Carbotech xp8 brake pads (or should I stick with stock for autocross?)

Track Setup (same as above with following additions/changes):
OZ 18"x8.5" fronts and 18"x10" rear wheels
Toyo R888Rs (235/45-18 front & 265/35-18 Rear)