All I have are Nismo short ram intakes...they were on the car when I got it a month ago. This was done at Church Automotive In So Cal. This dyno reads about 25HP HIGH...so don't get your shorts up your private parts when you see this. Just factor that in. All I was looking for were modest improvements and I got em. The biggest surprise was how friggn' RICH I was running...around 11.5 AFR!

Here is dyno baseline (GREEN) and after tune (RED). All I had were Nismo short rams. Like I said...just subtract around 25HP to get dynojet *equivalents*. Don't know about torque, but take off about 7% 15Lb Ft for dynojet *equivalent*. Got nice gains in torque accross the board..10Lb Lb Ft.



Here AFRs...leaned out from 11.5 to 13.0!



Much smoother acceleration and better GAS MI!

 

Does it register on the butt dyno? Would you do it again?

 

Damn that was rich as $hit!

Nice gains for a basically stock car.

You cant put a number on smoothness and better driveability....

 

I can feel better acceleration at lower rpms..2500 or so. In general, response is better all around. Accelerataing in 6th on the HWY is better too.

 

I'm pretty sure that 11.5 is the factory setting. Others have posted similar stock AFR readings.

 

Yep. Even stock base tunes from osirus and cobb are around 11.5 to 11.7 from what I've seen. Not exactly sure what their tuning to be honest.

 

If I recall from my base map the target a/f at W.O.T. at least on the DE is 11.7. This guy had no mods so we would expect near the target. With breathing mods you'll find it misses the target pretty badly.

 

I had Nismo short ram on...I would have expected a LEANER AF untuned.
That's why I was surprised to see it as rich as it was.

 

the stock ECU can run 600cc injectors. it has a wide ability to adjust your IPW. a tiny bit more air from CAI isnt going to just make the car run lean.

 

WOT is open loop so it doesn't make any adjustments there.

Furthermore the stock airboxes flow very well, so a CAI or short ram won't do much to the tune unless it fawks up the airflow across the MAF.

 

So this is pretty much BS then? (from AEM, which is NISMO):

http://www.raceindustry.com/part-sho...2007-350z.html



AEM Releases New Dual Short Ram System For 2007 350Z


The largest power gains are 10.2 horsepower and 8.0 lbs/ft of torque as measured at the wheels on the company’s Mustang dynamometer. This system is available with our new gun metal 2-stage powdercoat or mirror-polished finish. Dyno results and a description of AEM’s dyno and temperature testing procedures are on the company’s website at www.aempower.com.

AEM Air Induction Systems are dyno-tested against the competition to deliver unsurpassed performance. We tune each system right on the vehicle to deliver maximum torque and horsepower at every throttle position, and monitor OBDII sensors during this process to eliminate the chance of throwing a check engine light

 

yeaup

 

Waste of money on HR cars...

 

That old AFR is normal for a stock HR car.

 

It doesn't matter whether you actually gained power with the intakes or not -- you are still *close enough* to stock that the AFR won't have changed drastically from a stock car.

 

I know this is an old controversy beaten to death on these intakes, but It looks like this Nismo (AEM) is worth something here. Baseline on the HR (shown on this forum) shows 261HP. I have a baseline on a dyno that reads 8% high at 292 (see my first post). So that would put me around 268 on the dynojet.
Same with torque... my results at 256 TQ less 8% would correct to Dynojet 236 TQ vs 227TQ posted here for stock. So, with my only mod being the intakes, I would conclude that they definitely add something, albeit not what the manufacturer claims.

 

Unless it's on the same dyno, on the same day, with exact same conditions, and same car, it's pure speculation... don't try to apply conversions between different dynos and cars, and try to pass them as gains.

 

8% high on what day? In what conditions? Compared to what Dynojet? What car? Get the picture?

You aren't 100% that dyno reads 8% high, so all you are doing is guessing. Those intakes are garbage, if you want to prove me wrong go run your car faster down the drag strip than the fastest stock HR.

 

Here is info on Church Dynapack:

http://home.earthlink.net/~spchurch/id12.html

The 7-8% factor has been established after NUMEROUS comparisons...it's pretty much set in stone that this dyno is anywhere from 15-25 HP higher, depending on base HP (ie, 7-8% range). I use 8% to be conservative.

Here is an actual BACK TO BACK..7% difference (Pump Gas Plot, not racing was compared here):

http://www.8thcivic.com/forums/engin...jet-ftmfw.html

Church Automotive Dynapack - orange(pump gas) teal(race gas - ms109)
MD Automotive Dynojet - all were on pump gas
...fyi, the pumpgas plot on church's dyno and the plots on md automotive's dyno were done within 1 hour of each other on the same day, same calibration, no changes made to accomodate either dyno
Correction - SAE
...this just shows our dyno reads on average 7% higher than a dynojet

 

let me make sure I UNDERSTAND what you're saying here...as far as these intakes being *GARBAGE*

So I'll turn the table on you, do YOU have *evidence* that a car with a stock HR motor has trapped faster/same as a car with Nismo intake (AEM)??? What evidence do you possess that leads you to conclude that AEM intakes on this car are worthless *GARBAGE* as you put it? Show me anything..dyno or otherwise..with AEM intakes as the ONLY difference on an HR motor....that shows they are worthless as far as performance. At least I have SOMETHING here...unless you flat out reject the 8% factor I'm using.