[dflwrx]

I think the generalization that "NA is more popular for road racing" may be a bit misleading.

If this is being discussed for sanctioned racing series I think it's important to consider whether or not FI is actually legal and whether or not the cars using FI are forced to run restrictors. There are a lot of solutions out there to improve throttle response on FI cars, antilag and flat foot shifting are just a couple examples. Although, as mentioned previously, some series may not allow antilag... making FI relatively less attractive than NA.

I think it's important to consider the context of discussion... I think in any situation where there are not regulations limiting power output, or handicapping the FI cars to allow NA cars to compete with them, Forced induction would be almost universally preferred.

That is, in series where maximum power to weight ratio is not mandated, restrictors aren't required for forced induction vehicles, or displacement limits aren't lower for Forced Induction vehicles most teams/drivers would select to run a boosted vehicle.

That's my .02, on the other hand, as mentioned before NA is MUCH cheaper to race on average. So that's likely an important consideration for most people.