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Trying to understand the porting/polishing cross reference -- for Full Prep cars is porting/polishing unlimited? Does that extend to the combustion chamber bowl?

Only met him (longtime EP TR6 racer) once, at VIR last year. Really nice guy. Very sad to hear this.

Woot! I gots my dry sump (TR8, EP). Needed that, oiling issues were ruining season after season. Question on the 2mm reduction in the throttle body for the Z3. First, why just the Z3 and not all 2.5L BMW motors? That doesn't make a lot of sense as I think the consensus the problem wasn't the...

Just to confirm my thinking -- no electric water pumps allowed? Stock only? I don't see anything in the Prep 1 or Prep 2 rules on water pumps. Am I missing something?

Long time ITS racer here, building a bankruptcy inducing EP TR8 for VIR. Some pics from about a month ago -- hope this thing is on the dyno in a week or so and possibly at Road Atlanta mid March.

Long time IT guy here, not really following the Prod rules on door windows. I've got a two seat sports car, roll down windows with a fixed "vent" window. Can I replace all of the existing glass with Lexan/Perspex of 3mm thickness and run the car with the windows up? Or if I replace, do I have...

Ok, motor in question is a Rover V8. Rule says I can switch from the stock hydraulics to solids. Great, that gets me some more RPM to play with. Can I switch to a hydraulic ROLLER lifter? I'm thinking no but want to confirm that as I believe the rule says something like you need to use the...

The allowance is in the driveline section and just wanted to clarify that's true for front hubs on a RWD car as well?

The EP TR8 build continues. I'm relatively convinced the EFI is a better option than the four barrel, given 12 years of experience with these motors. In reading the rules, it looks like I have to retain the stock intake manifold and the stock throttle body. What about the plenum? Free with the...

Hello...see some familiar names here. I've raced an ITS TR8 since 2003, numerous races wins and the 2011 SEDiv championship. Love the car, other than brake maintenance. Lots of common knowledge out there about these cars that is wrong, including and most importantly the FI system v. carbs. In...