HAI Experiment

[Jay2TheRescue]

@Project 84: I wouldn't try to get your IAT's up any more, since you already suspect that your engine is starting to fail. I'm guessing that you're losing compression? If so, heating the air more, and losing even more power... Well that car may not be able to get out of its own way afterwards. However, after a repair or replacement of the engine I'd totally go for it.

-Jay

[Project84]

I've given up on FE mods.... for now. Been tinkering w/ my Z28 and finally got my Turbo Miata build underway. Right now it's performance. I cannot concentrate on two aspects of the auto industry at the same time and be productive.

Plan is, as soon as I purchase a house (I've been in the market about 7 months now, but I'm picky and want a GREAT DEAL; currently have an offer on a bank owned property in Short Sale, waiting 3 weeks to hear back from them) I'm going to use the garage space to re-ring and hone the Stock block, and drill oil relief holes in each piston, OEM didn't think of that for some reason. Might try some somender grooves for the hell of it while I'm at it, although, I'm not sure lowering the compression any more will help, as the car is slow until about 4500 rpm as is, which it never sees.

If I have to replace more than the rings, I'm going to port the exhaust side of the head and then have it decked, upping compression a bit, carve some somender grooves, evening things out, and hope for a more friendly FE vehicle, that doesn't run on oil, but only uses it for lubrication. lol

2 quarts every fillup (300 miles)

[sc2dave]

with my 96 Saturn sc2, and using Scanguage, i was able to get 42mpg at a throttle position setting of 15% with 17" wheels.I also put a resistor of around 110 ohms to make the engine think it was sucking in 147* air,approximately!

[jeep45238]

Originally Posted by sc2dave

with my 96 Saturn sc2, and using Scanguage, i was able to get 42mpg at a throttle position setting of 15% with 17" wheels.I also put a resistor of around 110 ohms to make the engine think it was sucking in 147* air,approximately!

Which is doing nothing for the vehicle. Your o2 sensor is picking up that the engine is running lean and the computer is dumping in more fuel to compensate for the false reading.

Tricking electronics won't do much at all, but performing the physical changet the trickery is imitating can help.

Right now mine's sucking air approximately 35-45*F higher than ambient (dependant upon ambient and how long I've been driving). It's helped a small amount, but it did help warm the vehicle up quicker in the winter.

[usedgeo]

It has been months since I posted anything. I still like warm air intake on the '01 SL1 Saturn. I now use a liquid air intercooler with a bypass water loop through it. My IAT sensor is screwed into the aluminum so there is a bit of bias toward the high side from heat conduction into the sensor. This gives me quicker warm air and regulates it somewhat. The air temp runs just a few degrees cooler than the water temp. I like it but I suppose it will never pay for the $175 intercooler. I became a bit obsessed.

My original WAI going through the resonator hole was more restrictive than I thought. I gained quite a bit of power with the new set up but could not retain the original air cleaner. I have an oil foam cone air cleaner now.

The engine takes a bit longer to warm up now. The intercooler and heater are enough to cool the engine on cold days. Grill was kept completely blocked most of the winter.

With Somender Singh grooves in the head and balanced injectors my car runs smoothly at 220 WT, 205 IAT and WOT. Never a hint of detonation. Of course your mileage may vary. Saturn's seem to like this. My power is more than I need.

Ernie

[Project84]

220 water temp... steady? That's putting a lot of unneccesary heat stress on your engine. My cooling systems is 100% functional and operational and it runs 198*F when driving after warmup and hits 210-212*F in traffic, the fans turn on and it cools back down to 204-206*F. I wouldn't feel comfortable running my engine at 220*F all the time.

And yes, your $175 "intercooler" was a horrible idea. You could've gotten a junkyard heater core for $5 and done the same thing.

[R.I.D.E.]

Mercedes service bulletins stated clearly that their engines could run at sustained coolant temps as high as 256 degrees without damage, as long as the antifreeze percentages were correct.

regards
gary