[Mike@N54Tuning.com]

Hey guys,

Here are some dyno tests on an otherwise stock car running 93+ octane comparing the stock airbox to the DCI on map 1, map 2, and then with meth enabled on map 3. As you can see the higher the boost levels and the higher the RPM the more gains the DCI offers.

Mike

[theriz]

nice mike!!!!!

JB4 FTW!!!!

[georgelb]

You have any with the torque curve too? People keep saying they hurt low end torque.

[The Ghost]

Originally Posted by georgelb

You have any with the torque curve too? People keep saying they hurt low end torque.

HP is derived from tq, so if the tq goes down, the HP at that same rom will to down. If you look at the above, there is no low-end power loss, thus there is no tq loss according to his test.

[thebigragu99]

Mike is the power being made on the map 2 with just a dci ??????

[Mike@N54Tuning.com]

Originally Posted by thebigragu99

Mike is the power being made on the map 2 with just a dci ??????

Yes. Full bolt ons the car has made 390-400rw on pump gas without meth.

Mike

[vasillalov]

Awww Mike,

Come on now!

Where is the torque curve or the boost levels?

EDIT: I keep forgetting the old saying: "You buy horsepower, but your DRIVE torque!"

[georgelb]

Originally Posted by The Ghost

HP is derived from tq, so if the tq goes down, the HP at that same rom will to down. If you look at the above, there is no low-end power loss, thus there is no tq loss according to his test.

Looks like it does on the last two; dunno.

[thebigragu99]

Originally Posted by Mike@N54Tuning.com

Yes. Full bolt ons the car has made 390-400rw on pump gas without meth.

Mike

custom map or striaght map 2 out the box??????And how much tq???

[vasillalov]

There is something else missing from this picture apart from the troque curves: mike is comparing stock airbox with dci. Well of course we will see a hp gain at the top end. The dci filters to indeed allow for more airflow compared to the paper filter in the stock airbox. Noone is denying that!

Mike, put a quality drop in filter in the airbox and compare again. This time post boost and torque curves too.

Enough sales pitching!

[Joshboody]

Originally Posted by vasillalov

There is something else missing from this picture apart from the troque curves: mike is comparing stock airbox with dci. Well of course we will see a hp gain at the top end. The dci filters to indeed allow for more airflow compared to the paper filter in the stock airbox. Noone is denying that!

Mike, put a quality drop in filter in the airbox and compare again. This time post boost and torque curves too.

Enough sales pitching!

torque don't matter... hp is directly related to air flow.

[Joshboody]

hehe, i like my contributions today, it's only been slight correction with all these tech discussions today

[rader1]

IMO the best comparo to do would be runs down the quarter mile. Take a tuned x35i and make 3 passes with stock air box and make 3 passes with a DCI and average the times. I magine the result will be that it really doesnt make a difference and the times will be within a couple thousands either way.

[SennaZ]

Originally Posted by rader1

IMO the best comparo to do would be runs down the quarter mile.

Precisely! The other way, of course, is to use one of those 'wind-tunnel' dyno rooms that can supply mass quantities of high velocity air.

[SennaZ]

btw, this is what the "real" dyno guys use for a fan

[vasillalov]

Originally Posted by Joshboody

torque don't matter... hp is directly related to air flow.

Then go drive a Honda. Those engines have one of the best flowing heads available on a passenger vehicle.

[thebigragu99]

Vas I agree with the sales pitch,but the dci does make more power then a restrictive air box with a cheesy drop in..

[Mike@N54Tuning.com]

Originally Posted by rader1

IMO the best comparo to do would be runs down the quarter mile. Take a tuned x35i and make 3 passes with stock air box and make 3 passes with a DCI and average the times. I magine the result will be that it really doesnt make a difference and the times will be within a couple thousands either way.

All the fastest times have been recorded with a dual cone intake. It's simply the best cheapest alternative to the stock airbox. Now if you run map 1 (13psi tapering to 10psi) the difference between the stock airbox and the DCI isn't huge and could be eaten up in run to run variance. But at 17-18psi on meth we're talking a 20hp+ difference that is impossible to miss at the track.

Mike

[rader1]

Originally Posted by Mike@N54Tuning.com

All the fastest times have been recorded with a dual cone intake. It's simply the best cheapest alternative to the stock airbox. Now if you run map 1 (13psi tapering to 10psi) the difference between the stock airbox and the DCI isn't huge and could be eaten up in run to run variance. But at 17-18psi on meth we're talking a 20hp+ difference that is impossible to miss at the track.

Mike

If thats the case, then i'm all for it. I just dont get the whole DCI vs stock airbox arguement, its a $99 part that even if it does absolutely nothing hp wise(which your dynos seem to prove is not the case) it has no real down side. I just get tired of seeing all the "more hot air vs less cool air" debates.

[nafoo]

Originally Posted by Mike@N54Tuning.com

All the fastest times have been recorded with a dual cone intake. It's simply the best cheapest alternative to the stock airbox. Now if you run map 1 (13psi tapering to 10psi) the difference between the stock airbox and the DCI isn't huge and could be eaten up in run to run variance. But at 17-18psi on meth we're talking a 20hp+ difference that is impossible to miss at the track.

Mike

Do you have any comparisons between DCI v. CAI (STETT, Dinan, UR)?

[ar design]

Looks good sir!

[Mike@N54Tuning.com]

Originally Posted by ar design

Looks good sir!

Thanks..

The graphs really show the upper RPM gains from an intake upgrade..

Mike