Cold Air Intake

thanks very interesting

With work /family /Christmas excitement I haven't got back to the forum

The scangauge is now on the birthday list with my wife.

I've promised her I won't get OCD with this car, and at least wait until warranty the is finished before any real changes.
She didn't realise sound proofing would mean stripping out the whole interior

The scangauge will pick up the temp difference, but the at highway speeds the under bonnet temperature stays close to ambient. It's in the city with low speed and stationary that under bonnet temps really go up. There should be enough Australian summer left after my birthday to test any benefit.

The other factor changed is picking up high pressure air from the grill. This is the inverse of the temperature benefit, in that at low speeds almost no pressure would be seen, but at highway speeds it may be possible to eliminate the losses from the intake tract. It would be very unlikely to see positive pressure, as you'd need a proper scoop shoving the air into the throttle body.

So a vacuum gauge in inches of mercury would be needed to do a base line at 100kph, then add the $25 CAI and calculate the difference.

I think I'll stick to the original plan, just enjoy an interesting, reliable, (relativity) economical, NOT shopping trolley car . . . but I'll still get the scangauge, can't resist.

You don't need a vacuum gauge, you can calculate it from MAP. I'll be interested to se what losses you get from the stock intake tract, I think you'll find its a lot less than you may think.

Last time i had a car i cared about, it was carburetor and a vacuum gauge was your best friend for tuning.
Darn 'puters making life simpler.

Oh it was an 87 Suzuki Sierra, so this car is the reliving your youth cliche