SUPERCHARGED NC Racer Project!

[Brian]

okay cool.

well Brian i got another question..

I recently installed the AEM CAI.

I took the liberty of Emailing Cosworth asking if the S/C will work with the CAI.

This was their reply:

"Ronald,
The answer to your question is no.
Our kit includes a new air box lid with a larger diameter MAF housing
and the ecu calibration is scaled to work with the diameter if that
housing.

Using any cai will cause detonation and poor performance.

Thanks for asking.
Ken"

What does he mean by detonation?

Also if i were to stick with the CAI is there a way i can calibrate the S/C?

Detonation is ping, or pre-ignition. That's incomplete combustion that causes rough running. With the optional extra software upgrade you could calibrate to work with the CAI....but certainly less work to simply sell the intake when you get the supercharger (you won't miss it once the supercharger goes on).

[rr1santos]

hmm.. okay..

i can probably drop the CAI in my moms AUTO NC?


but if i were to calibrate it...wouldn't it improve performance of the S/C

CAI would offer better air flow since it's air entering the grille vs air from the upper half of the bumper (given theres a panel inbetween the stock airbox tube inlet and the radiator seems like little airflow to none)??

[Brian]

Far from clear with the forced induction that you would notice any difference with the CAI given the tuning issue that comes with not using the box that Cosworth designed to work with the supercharger. Thus, I suggest the potential downside easily outweighs the upside.

[rr1santos]

gotcha.

what's the cost on labor from a local mechanic (specializing in mx5s preferred)?

and average cost on Dyno/tuning

[Brian]

"Rocky" does the install in about 12 hours. He owns a Miata, and works on them every day and customers have driven from as far as Alaska for Rocky to do their Miata supercharger installs. Figure roughly $900 for install. As for dyno tune, we don't have a dyno here, but there are several local places we have used and can direct you to.

[avkills]

Hey cool Brian, thanks for posting the estimated labor cost for that install. My plan was exactly that; driving to sunny California to have you guys install when I am ready.

-mark

[rr1santos]

For those with S/C how is your gas milage? i've read that expected gas milage is lower than what it should be since the S/C cause the engine to work a little harder/faster?

[mykrrrr]

For those with S/C how is your gas milage? i've read that expected gas milage is lower than what it should be since the S/C cause the engine to work a little harder/faster?

really depends on how you drive the car but you'll see a slight decrease in mpg.

[Sandor]

As previously stated, Fuel mileage is very subjective. It all depends on how you drive the car. I was getting around 28 MPG on the average, when not doing a lot of hard driving. That now has dropped to around 25 or so. However, if you get in the throttle hard and do so often, your consumption will go up dramatically and you could see numbers in the high teens and low 20's. Not a bad trade off for the power. I was getting in the low single digits in my Mustang when I romped on it up a lot. The power to weight ratio was about the same, but, the handling was not even close. I, for one, am happy with my decision to buy the S/C, and would do it again.

[Brian]

On the racetrack I got just 10-12 mpg BEFORE the supercharger went on...and not much different now on the track. I don't have much opportunity to pay attention to my street mileage....as an autocrosser I never fill the tank (except for those track days).