S/C owners: collecting information

[cali yaris]

My stock one is laying around... somewhere. Probably under a body kit that didn't sell.

lol

[kurokoma-kun]

Originally Posted by LtNoogie

The ECU is just too smart to fool. The car runs fine like this. Note that the bottom half of the filter at the tip is also taped up.

haha, nice mad science there noogie-san, I look forward to reviewing your lab notes.

SO... it sounds like we have obtained similar results, just by different routes--you are stabilizing your afr by lowering boost (via inlet restriction) and I am getting the same effect from boosting octane, thus allowing for more ignition timing advance...

i dunno, is that even right?

[LtNoogie]

I think that if I regress my car all the way back to stock, other than the S/C kit, I'll get the performance they designed for.

Next, my stock steelies and skinny tires go on. Then I'll raise my car with the OEM shocks and springs. That should get +5hp.

[kurokoma-kun]

It's interesting to note that the Blitz installation manual specifies two types of intakes recommended for use with the kit, the Sus power air cleaner and Sus power core.

http://www.blitz.co.jp/products/aircleaner/suspower.htm

http://www.blitz.co.jp/products/airc...re_type_lm.htm

In japanese but tons of pics, piped all sorts of dayum ways depending on application--how do you think they compare to what you have, Long?

[LtNoogie]

I don't think they use enough blue painter's tape for maximum performance.

Seriously, back to my previous post, if you could dare to run without an air filter, you could still not move any more air than what the diameter of the throttle body will let you pass. Now if the inlet to the stock airbox is smaller than the throttle body throat, some engineer at Toyota has determined that that is the optimum air inlet for whatever reason... performance (unlikely)... emissions... who knows.

We are requiring more airflow because we have a compressor, in effect sucking more air through that throttle body. You would think that we would need a bigger inlet than the stock 2" opening hence the larger filters.

I'm still trying to work this through my head why Peter's setup is not starving for air or for that matter my taped up setup.

[eTiMaGo]

one of you guys could also look into the effects of installing a larger throttle body, though I suppose it might make the lean condition worse...

[PETERPOOP]

i would think it would. i will use one during my tune.

[LtNoogie]

I don't think that more air is what we need. I think we need same air as stock or IF we have more air, then we need more fuel.

[eTiMaGo]

right, right, true... just throwing ideas out there... One more thing I just thought of, the old "resistor trick" does have its merits, by telling the ECU/Fuel controller that the MAF is seeing a higher airflow, it ought to adjust with more fuel. In closed loop mode the ECU will be smart enough to compensate for this, but once in open loop mode it could actually allow a measurable enrichment. at just a few cents (or $50 on eBay), it could very we be worth trying

[LtNoogie]

Yeah, it's too bad Garm cut his apart. I was going to offer him $80 for it.

Secondly, I found this plastic thingy in the garage that looked like a cross between a french horn and a solid bagpipe. From examininig archealogical sketches, I was able to determine that it was my stock airbox.

[cali yaris]

LOL

[PETERPOOP]

Originally Posted by LtNoogie

Yeah, it's too bad Garm cut his apart. I was going to offer him $80 for it.

Secondly, I found this plastic thingy in the garage that looked like a cross between a french horn and a solid bagpipe. From examininig archealogical sketches, I was able to determine that it was my stock airbox.

let us know your AFR when you get it on!

[LtNoogie]

I actually put so much blue tape over my filter that the car almost stopped running. I had to pull over to give myself a "tune-up". What is totally wierd is that the AFR gauge was a constant 15. I cannot get this car to go rich for the life of me.

[kurokoma-kun]

Originally Posted by LtNoogie

What is totally wierd is that the AFR gauge was a constant 15. I cannot get this car to go rich for the life of me.

Just bizarre Long. It's too bad we all have such different set-ups, makes it much harder to compare notes.

My latest observations: today I spent my first significant time on a major highway since installing the supercharger; drove about 30 minutes each way at constant 60-80 mph. At these speeds I was in boost for much of the time--and every time I hit even 1 psi of boost the AFR immediately went rich (11-12s), and (in due course ) the scangauge showed open loop.

camell, is this what youre saying you wish yours would do?

Same nice performance as usual from the car btw, just different gauge readings from what I've seen on my daily commmute. At those lower typical engine loads and speeds its been going into acceleration induced open loop a lot less often--only at higher boost level (say 5 psi) + throttle position (above 50).

[cali yaris]

Since Blitz only supplies a fuel controller, how would they make the car enter open loop when they want it to? Isn't that a function of the ECU? I'm not technical enough to understand what controls what, exactly.

[eTiMaGo]

as far as we can tell, the fuel controller sends some kind of trigger signal to the ECU to make it go into open loop.

Where it's confusing is that camelll believes in some conditions, there is a small window of time in between the supercharger activating and producing boost, and the ECU actually going into open loop mode and thus providing enough fuel. So, in that small window, there would actually be a lean condition of not enough fuel to go with the increased mass of air.

Unfortunately like Garm mentioned, the activation time of open loop depends entirely on the ECU, it's unlikely the blitz controller can speed this up in any way...

[kurokoma-kun]

Q: could Blitz possibly increase this kit's amount of AWESOME???

A: after autocrossing it yesterday, I'm gonna say this adjustment is not necessary



Not to make light of anyone's concerns, I'm just enjoying the hell out of the supercharger, with tinkering being approximately 33.3% of the fun.

[eTiMaGo]

that's right, make us atmospherically-challenged folks even more jealous, you evil woman