[sperry]

Originally Posted by Libila

What kind of handicap would you guys think would be fair for a Jag S-Type Diesel and a 05 STi? I'm thinking of assigning points to different aspects like motor size, forced induction, drivetrain layout, whp, wtq, and weight in an attempt to make the cars "even."

Thoughts?

I wrote the Time Trials Production car rules here:

http://www.seccs.org/ttclass.php

Here are the results:

TT Classification for a 2006 Jaguar S-Type Diesel (UK spec) (based on Rev 1.1.9 rules)
Trials Weight:
3826 lbs Official Weight (including driver)
Modifier Calculation:
1.0 Baseline
+ -0.25 Diesel
+ 0.8 Forced Induction
+ 0.25 Multi-Valves
+ 0.25 Multi-Cams
+ -0.626 Weight
= 1.424 Total Displacement Modifier
Displacement Calculation:
2.7 L Base Displacement
* 1.424 Displacement Modifier
= 3.8 L Adjusted Displacement
NORPAC Trials Classification:
TT-5

2006 Jaguar S-Type Diesel (UK spec)

TT Classification for a 2005 Subaru STI Type UK (based on Rev 1.1.9 rules)
Trials Weight:
3200 lbs Official Weight (including driver)
Modifier Calculation:
1.0 Baseline
+ 0.8 Forced Induction
+ 0.25 Multi-Valves
+ 0.25 Multi-Cams
+ 0.5 Variable Valve Timing
+ 0 Weight
= 2.8 Total Displacement Modifier
Displacement Calculation:
2.0 L Base Displacement
* 2.8 Displacement Modifier
= 5.6 L Adjusted Displacement
NORPAC Trials Classification:
TT-3

2005 Subaru STI Type UK

So the STI is a significantly faster car according to the weight of the factors I've included. Basically the Jag's motor is the equivalent of a 3.8L low tech N/A motor. The STI is the equivalent of a 5.6L low tech N/A motor.

By looking at the modifiers in the TT rules, you can kind of get a feeling for what we decided each piece of technology is worth. Unfortunately for your purpose, the rules assume the cars have all made significant braking and handling upgrades. If both cars are stock, the STI will have even a greater handling advantage not built into these numbers which are essentially all power to weight adjustments.