Your track times will be slower for sure

If you can tune it a bit more aggressive on timing then your times should go down, but other than that they should stay about the same. Most of my time gains between stock ecu and AEM were because I could raise the boost with the larger injectors on the AEM.

 

I notice a definite increase in power and I am getting to 8400 rpms in fourth from a 2nd gear forty roll a full second faster than I did with the AFC and only reaching 7600rpm!!

 

Well I did have 8000 rpms on my stock ecu. What is your max timing with the AEM?

 

14-15 degrees on race gas...110 octane with as much boost as the lil 16g can muster..pump gas was like 12-13 at 20 psi...I put three cars on Chris's stage three srt which trapped 117...and now is faster than it was when he trapped 117....I pulled on him steady from 2nd to the end of fourth. I was on pump gas he was on race gas!!!

 

Bumping this for some more data.

Difference between stock OEM airbox with K&N drop in filter and then swapping for a open air filter:



24whp gain from the open air filter with a FPgreen turbo. Boost levels are the same (it increased up top with the air filter but I brought it back down to match)

(the 350whp run was it totally maxed out with the stock OEM box, I could not create any more power with it)

 

Bump for presenting information that goes against the "prevailing wisdom."

Always question the status quo

 

FWIW, it's always best to conduct such tests on the same day and near the same time if possible to eliminate variations that occur with weather/temp. I realize that it isn't always possible, but as we noted just recently with some dyno testing, it makes a difference.

Likewise, a A/B test with the stock box and then another run with the filter removed would be insightful as well.

 

Ted, I couldn't agree more. I will post my old graph again. Same day, 10 minutes apart, same everything, no tuning changes. Blue line is with airbox top off and NO filter. Red line is with OEM box and OEM filter:




This graph's two pulls are taken almost a week apart and is therefore not a valid comparison:

 

I can understand 5whp or so difference 10 days apart but 24whp?

I can do before/after on the dyno same day if you want. Trust me it was maxed out, no amount of tuning changed anything more than +/- 5 whp. Smogrunner, of course I made tuning changes for the open air filter. Why wouldn't I have?

You can shoot it down all you want but it happened. Saying that small temp differences on a dyno with huge box fans made a 24whp difference is just plain insanity. If anything it was warmer the day with the open air filter in the dyno room.

Here is a case study comparing stock OEM box to ARC intake box, same day, same dyno, 15wtq / 13whp gain on a evo 9 with stock turbo that was hardly close to being maxed out, still smoke and mirrors?

https://www.evolutionm.net/forums/sh...&highlight=ARC

 

FWIW, you may want to re-read that entire discussion, and consider the data and the 'devil in the details' along with it.

No need to get angry with us, we're just illustrating the potential effect of variables that you didn't consider that affect the outcome of such tests. And yes, 10 days and 10 degrees difference (according to the weather records for Hayward, CA) do create issues of variability.

No one is questioning that a good intake isn't potentially worth something. What needs to be done when testing different air intake assemblies has been discussed ad nauseum, and it's a bit tedious if quality, reliable data is going to be generated. We didn't make it that way, we're just illustrating what and why for the benefit of those who may be misled into believing that bolting on an aftermarket intake is going to net them 25whp.

 

Bryan,
You may very well be right that aftermarket boxes choke power at higher rpms. If you look at the dyno I posted, the pull with no filter DID make more whp over 6500rpms with a peak gain over around 7whp at 7500rpms. Also, I'll post up the same graph again, but this time with the air/fuel graph expanded to more clearly show differences. My guess is that we are both right: there ARE gains (you) but they aren't dramatic enough to justify the removal of the box (me).

 

Here is the graph again with the Air/Fuel curve MUCH larger. The blue line is without the airbox on and it does appear to be slightly leaner throughout much of the pull which would indicate a gain in efficiency. Readers, draw you own conclusions....

 

My question is, even with the filter out, is the stock box still a restriction?

I don't think that question has been answered.

 

Dave Buschur had shown a solid increase with his filter which only increases as the WHP does. It is a great mods and works well with a proper open air Element.

 

I dont understand UICP's like that , those alone would perform worse than the stock pipe