Rob, I was actually quite impressed with the drivability of Jim's car. As I said, at low rpm it was basically like stock. No lurching, missing, stalling, surging, etc. Drove just like normal.

I think the reasons why no OEMs use centrifugal blowers are as follows:

1. Noise - I was really surprised by the amount of noise that centrifugal blowers make. I've heard the whine before on Stangs and stuff, but never driven one around. It would probably be untenable for most modern car engineers, or would require some serious sound deadening work.

2. Performance benefit - minimal low end boost is akin to the primitive turbo engines of the 80's. Centrifugals are more linear than turbos, but they don't offer the city driving torque that so many manufacturers are looking for. Take a look at the latest OEM turbo cars - they're going to smaller and smaller turbos to increase low end boost and reduce lag.

I agree that aftermarket engine management designed for boost is preferable, but the Comptech kit works well within reasonable limits.

UL

 

Doesn't the Jaguar use a Paxton?

 

UL, good to know that the Comptech kit appears to be solid. Personally, I intend to keep my motor NA in the spirit of the car.

Also, Jaguar, like just about every other OEM that offers a supercharged engine, uses Eaton blowers.

Rob