Sorry if this has been discussed. I was looking at a pic of the Spirit R that was done for Sevenstock and noticed that there is an airguide in the license plate holder. Is this true and how effective is it. Was debating on the 99 spec or the one without the plate holder.

 

its effective if you have the 99 spec airbox as it allows air into it. However, if you put a plate on the front then you defeat the purpose.

In our case, most people have after market intakes so the airguide is less useful. Behind the bumper, there is another airguide that most people don't buy with their bumpers. I posted a link on it. With an ASP intercooler and scoop installed it does allow a "guide" to the inlet of the intercooler duct. Whether its effective or not...who knows.

https://www.rx7club.com/forum/showth...light=airguide

 

Hi there,

Granted the opening is for the air intake, but it opens into the air space behind the bumper, and is not directly ducted or linked to the air intake to the filters (as shown in the attached photo. The extra rounded intake was placed into the bumper just as an added precaution, though). With a number plate in place, there is a gap between the plate and the intake, allowing air in (although not in a direct ram effect). Indeed, the pictures in the Spirit-R catalogue, show the air-flow diagrams, with the plate in place covering the opening. I'm not saying things can't be improved if the plate wasn't there, but for a std FD, Mazda obviously thought the redesign was good enough to allow unrestricted, cold air flow to the airbox. If you didn't already know (apologies if you did), the air and intercooler intakes were split post 99, so they are both dedicated. The intercooler draws ram air from a duct in the front radiator opening, so no chance of the dreaded inter-heater effect!

 

Here, This shows how the ducting works. I think if it didn't help Mazda would have left it off.

 

Cool, thanks for the info. Kinda seems a lot like the feed bumper (without the plate holder, obviously)