I took the R to the dyno today (brand new dynojet) to get some basic baseline numbers before I do some tuning, and before I replace my rattling cat and add SMSP's cat-to-bpipe bottleneck remover. (Thanks for helping me out Dave)

I also wanted to see the diff between the stock box and AEM, and see how much gains you actually receive from removing the power steering belt.

Mods:
AEM Intake (currently in shortram form *)
JDM DC 4-1 Header
2.5" Carsound cat (rattling and soon to be replaced)

*I used to have the AEM in cold-air form, but replaced it with stock intake. At some point I decided to put the AEM back on in short-ram to see how I liked that.

So anyway, on to the numbers:

Run 0: AEM short-ram: 160.9hp/122.5tq

Run 1: AEM short-ram: 161.2hp/122.5tq (basically no change, 0.3hp, just wanted to warm car up and see if it was consistent)

Run 2: Stock airbox: 164.9hp/121.1tq (peak 3.7hp gain, 1.4tq loss)

Run 3: Removed power steering belt: 169.5hp/123.4tq (peak 4.6hp gain, 2.3tq gain)

I'll have the charts up tomorrow hopefully, which show a lot more info, specially the low-end gains. But basically I showed once again that the stock air-box owns, even with the stock filter (and I mean stock, the one the car came with and was never used, lol). Also proved that removing the power steering belt actually makes an impressive gain (almost 5hp!). Again, all things that have been shown before, but it was fun to do.

In a couple weeks hopefully I'll have the new cat and b-pipe bottleneck remover, and a FPR and VAFC to tune with, to see what kind of numbers we can make. I'm hoping for 170hp with the P/S still hooked up, which is how I drive it daily.

edit:
Here's the dyno graph... run 0 not included. Regarding comparing the stock intake with the AEM- if you look at the curve it seems generally smoother with general gains overall, particularly from 7000rpm and up, not just peak. Again, I'm no expert (far from), so I'll let all of you with actual dyno/tuning experience draw your own conclusions and post your thoughts.






Modified by uncleben at 2:28 PM 11/30/2003

 

Good stuff, I look forward to seeing the plots

 

nice numbers man, and thanks for the help, cause alot of peeps have questions about removing the power steering belt, my a/c and power steering belts are removed :-)

 

does your car has AC ?

 

it really depends on the condition...the stock air box on the itr is very efficient because it pulls air from the fenders....but in really cold weather, I'm pretty sure that the AEM would make better numbers.

 

Beautiful, I plan on ditching my power steering very soon. Thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MiraiZ &raquo;</TD></TR><TR><TD CLASS="quote">...but in really cold weather, I'm pretty sure that the AEM would make better numbers.</TD></TR></TABLE>

I guess it's impossible to know on a dyno. It was probably about 55 degrees in the shop, as we had the garage door open. Plus the monster fan blowing across the front of the car. I imagine when I put a K&N filter in the stock box though, it will gain another couple hp on the dyno, which should even the playing field out a little between dyno numbers and on-the-road numbers.

GettaluvR: yes, I still have AC on my car. I was really surprised at the gain with that power steering off- makes an aluminum pulley set seem like a pretty cheap/effective mod.

 

Question: was the only mod the intake on the baseline run?

 

How can you say the stock air box 'owns' It only gained 3 hp which you'll never notice and it lost torque. As far as I see it our cars need as much torque as you can get as they forgot to add it at the factory. Otherwise good numbers, what was your base though, like stock as can be?

 

so, do you have any idea what type of oil temps you were seeing run to run... nah, i didn't think so.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Arsenal &raquo;</TD></TR><TR><TD CLASS="quote">How can you say the stock air box 'owns' It only gained 3 hp which you'll never notice and it lost torque. As far as I see it our cars need as much torque as you can get as they forgot to add it at the factory. Otherwise good numbers, what was your base though, like stock as can be?</TD></TR></TABLE>

Because you don't have to pay for the stock airbox. It also made more hp which means it was holding on to more torque up high which is were I'm at when I race. Just because the peak torque was higher doesn't really mean squat. (this is in a non aggressive tone by the way )

&lt; has an AEM CAI

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Arsenal &raquo;</TD></TR><TR><TD CLASS="quote">How can you say the stock air box 'owns' It only gained 3 hp which you'll never notice and it lost torque. </TD></TR></TABLE>

like I said, thats just peak, you'll have to see the actual plot to see the entire gains.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Deez Nuts &raquo;</TD></TR><TR><TD CLASS="quote">so, do you have any idea what type of oil temps you were seeing run to run... nah, i didn't think so</TD></TR></TABLE>

Please enlighten me. Seriously. I have no idea how what you said relates to my post. No, seriously, I don't know what you are talking about. So, since I don't claim to know anything beyond the most rudementary stuff regarding going to the dyno and using its results as useful information, how about you fill me in... you know, if you have the time and all.
(really, I'm not trying to be sarcastic, I'm honestly saying I'm not knowledgable about this, just please explain instead of just the "you're a tool, so there" statement)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ActiveAero &raquo;</TD></TR><TR><TD CLASS="quote">It also made more hp which means it was holding on to more torque up high which is were I'm at when I race. Just because the peak torque was higher doesn't really mean squat.</TD></TR></TABLE>

yup, and when the Dyno guy posts up the dyno's on his website, I'll post them here for all you experts to mull over. edit: dyno's up...


Modified by uncleben at 2:48 PM 11/30/2003

 

Yeah, hp and tq are kind of relevant when dyno'ing for power, but stop dodging the important question. What were your oil temps on each run?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D &raquo;</TD></TR><TR><TD CLASS="quote">so, do you have any idea what type of oil temps you were seeing run to run... nah, i didn't think so.</TD></TR></TABLE>

Ok wise guy

Explain that.

 

Thanks for the graph. It confirms the stock airbox was better in this case. It either out gained or was dead even with the AEM everywhere except for a measly 400rpm or so. The AEM having more torque was due to a minute little spike thats barely noticeable.

By the way I was comparing the red and blue lines, not the green so I'm not confused

 

Got any pics of the intake? I want to see where you cut it how short the short ram really is.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by uncleben &raquo;</TD></TR><TR><TD CLASS="quote">and see how much gains you actually receive from removing the power steering belt.
</TD></TR></TABLE>

too bad you cant turn the wheels on the dyno , you'd really see a big difference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B2FiNiTY &raquo;</TD></TR><TR><TD CLASS="quote">Got any pics of the intake? I want to see where you cut it how short the short ram really is. </TD></TR></TABLE>

I'll try and find some pics. I wouldn't say it was THAT short either, I cut it a bit before the elbow, enough that the filter fit very comfortably without touching anything. Why, what you thinking? Curious minds want to know.

 

The length can affect how much power you make on a dyno.

Was the hood up? Fan blowing?

Just curious cause it's hard to dyno an intake. But numbers are numbers.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Batoutahell &raquo;</TD></TR><TR><TD CLASS="quote"> What were your oil temps on each run? </TD></TR></TABLE>

Gee Ben - next time, just hold your finger in place of the oil plug so you can tell us if it was
1. Cold
2. Medium or
3. EXTRA Spicey hot
...during your dyno runs! hehehehe (I owe you a beer for that one.)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B2FiNiTY &raquo;</TD></TR><TR><TD CLASS="quote">The length can affect how much power you make on a dyno.

Was the hood up? Fan blowing?

Just curious cause it's hard to dyno an intake. But numbers are numbers. </TD></TR></TABLE>

hood all the way up and one of those huge warehouse type fans in front of the engine. this pic kind of shows- right before I removed it. i tried to have it cut so the filter was about where it would be in the box, but it's a little more forward i think.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B2FiNiTY &raquo;</TD></TR><TR><TD CLASS="quote">The length can affect how much power you make on a dyno.

</TD></TR></TABLE>

I agree with this one (and its not only on the dyno). You would of seen a noticable gain with the uncut AEM.

Get a AFC or a field and a Adjustable FPR, you will gain all around if you adjust that A/F ratio.

Your Dynoplots are no good to compare the intakes (they were not tuned), just slapped on.

 

.....thanks for the plots of a near stock itr.

Had you a chance to run open header, you'd definitely have noticed some quiet remarkable gains..... (more so than the p/s belt removal, imho)



And thanks for the a/f plot!

Do you perchance have the a/f and whp/ rpm/ tq plot of a bone stock itr for comparison's sake?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Black R &raquo;</TD></TR><TR><TD CLASS="quote">Do you perchance have the a/f and whp/ rpm/ tq plot of a bone stock itr for comparison's sake?</TD></TR></TABLE>

edit: duh me...
nope, sorry man, first time to the dyno, only with the JDM 4-1 DC header and 2.5" cat on.


Modified by uncleben at 9:20 AM 12/2/2003