S/C owners: collecting information

[LtNoogie]

Thanks for sacrificing for the team. I was just told that the opening to the stock airbox is 2" in diameter. That seems awfully small when you look at these big-ass cone low-restriction intake filters but it made me think some more.

Performance will be limited to the smallest restriction if air speed is equal. The smallest restriction is either the stock airbox inlet or the diameter of the stock throttle body.

Does anyone have the diameter of the stock throttle body opening. I'm sure if I searched, I would find it in another thread but maybe one of you have it handy.

It looks like I need alot more blue tape this afternoon. No wonder there was very little effect with the amount of tape I put on the filter.

[cali yaris]

Blitz has confirmed that they tested the kit on a stock car.

[LtNoogie]

I'm going to wrap my beautiful aFe cone shaped filter in black electrical tape and leave a two inch diameter hole? That sucks (pun intended)

[LtNoogie]

Mike, tape up your filter and see if your ignition timing climbs back up to double digits. I'm hoping to feel the additional power that the timing advance will give me.

[LtNoogie]

I forgot that you have a CAI and that the filter is stuck in the fender. Anyways, I'm off work now and will go out to the parking lot with my trusty roll of blue masking tape to do some more "tuning".

[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.

It's not going to win me points at any car show.

[PETERPOOP]

lol. definately no points for style. maybe someone can sell you their stock airbox that is lying around the garage or something? I'm sure there are people with them still, who don't care for them.

[supmet]

Originally Posted by PETERPOOP

lol. definately no points for style. maybe someone can sell you their stock airbox that is lying around the garage or something? I'm sure there are people with them still, who don't care for them.

or would trade for an AFE

[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.