The custom intake measured a full 3 inches in diameter, over a 1/2 inch larger than the rubber BRP intake. In addition to the increased diameter, the custom intake allowed for a much smoother flow of air into the supercharger, especially near the fire-wall, at the throttle body, where the factory BRP intake used a 90 degree silicone elbow. Both improvements increased the superchargers ability to operate efficiently and increased boost slightly.

The custom intake had a similar effect as adding the Big-Bore-Throttle-Body to the kit, which I had already installed on my Miata's setup.

The combination of the Big throttle body and the 3 inch custom intake is probably the reason I saw a slight increase in boost.

Mike

 

Oh, and thanks for the compliments on the Miata

 

[QUOTE=Rdrcr,Sep 24 2006, 08:55 AM]Oh, and thanks for the compliments on the Miata

 

Still patiently waiting...this is the solution I want....Blower reliability with turbo performance.

 

Wouldn't that be a Centrifugal Super Charger?...

It's reliable and it's the closetest you can get to a turbo setup with a SC.

A roots-blower acts nothing like a turbo.

Andre

 

I think you have some reading to do 8K.

Proposed performance from the BRP PD blower is much closer to that of a small turbo than the centrifugal SCs.

 

I don't have to do any kind of reading... he never mentioned a small turbo... he just said turbo. And the closest you can get to a turbo, is a centrifugal SC.

A blower gives all out low-end grunt... a normal sized turbo will not, unless it is really small, in which case it will do you nothing up top.

Andre

 

Latest update is that they were installing the first BETA kit last week on a customer car and had to scrap the initial design mounting brackets and dummy throttle body due to fitment and clearance problems. They should have the new brackets and TB in this week or early next.

A centrifugal SC builds boost in a linear fashion, not realizing full boost until max RPM. This results in a not-so-flat lower torque curve than either the turbo or positive displacement SC.

A turbo builds boost faster, reaching max dependent on how fast it spools up and then holds it depending on sizing. Typical S2000 turbos hit max boost in the 3500-4200 rpm range and most hold it all the way to 9K.

The positive displacement SC (which BRP is using) should build max boost at around 3500-3800 and hold it to redline - which makes it much more like a turbo in performance than the cetrifugal SC.

AusS2000's comment of "small turbo" was in regards to the assumed power being made by the BRP - 280-320 RWHP.

I also wait patiently - I should be getting one of the first kits that ship.

 

8K.... the BRP blower is very close or above the performance of all the "bolt on" turbo kits available from our sponsors. Unlike the centri blowers, roots blowers spool WAY faster, and you are in the powerband as quickly, or sometimes EARLIER than a turbo. Thats what I mean.

 

a Roots blower looks nothing like a turbo, but it acts a lot like a turbo ---


And Roots blowers are solid and dependable enough for OEM applications...





I can't wait for the dynos and videos of this beast...


well - I guess I'm gonna have to wait