HAI Experiment

[Project84]

This makes me smile. I had forgotten about this site on purpose because of my recent poor gas mileage and lack of enthusiasm for attempting to save gas... my rings are shot (or at least, they've got 1 foot out the door).

But I just signed back in the other day and posted about someone's SL2, advising him to add a HAI... now today I'm getting a big thumbs up of gas saving when I'm least expecting it.


Truth is, my HAI cost me about $12 and paid for itself within a month, ever since then I'm saving gas. Even now, when my numbers are slowly lowering because of my engine about to need an overhaul, I'm more than willing to bet if I took the HAI off I'd drop 3 or 4 MPG on my next fillup.

Lets keep in mind the HAI is my only mod other than my ScanGaugeII. Hell, I haven't even checked tire psi in 6 months. I do not P&G, EOC, or any other acronym. lol I literally just DRIVE, and try to "smart brake" when I remember to.

EDIT: I also never completed any insulating as has been discussed by other members, which will increase IAT's even more. Mine is a VERY savage design. Some flashing as a heat shield, dryer ducting for an intake, and it's got a hose clamp on a 90* PVC plumbing fitting just hanging out of the bottom of the airbox. I'd say if I'm lucky I'm only getting about 60% hot air into the intake, the rest is going to be engine bay air/fresh air. Intake temps rarely get above 150*F, and that's on the HOTTEST of summer days. It's been tested and found beneficial to reach 170-180*F in the Saturn S-Series. I've never seen temps that high. I can only imagine if I did get 170-180, I'd be saving even more gas (although there is a lack of engine power at those temps, and I've heard emissions #'s get ugly)