just an all stock baseline run: 203.9 hp - 219.7 tq

one screen said 204.8 but another said 203.9 but oh well.

just for fun the guy simply removed my stock air filter for the 3rd run....213.4 hp - 222.3 tq with about a constant 7 lb-ft torque gain from 4800 to redline. pretty nifty for just removing the filter.

 

My dyno w/ the PR CAI and a heat-soaked engine posted 205.65hp 222tq. I wonder what I would have posted if they could have gotten a good reading on the 1st run, rather than having to try 6 times to get a good reading. No matter what anyone says - I'm a firm believer that the hotter the engine is, the lower the numbers will be. The SAE adjustments are good only for climate, but say nothing about the internal temp of the engine. You know your car is hot when the fans are blowing @ idle before even starting to record your run.

Has anyone else dyno'd theirs with only 1 mod and/or stock?

 

i guess stillen's claims of 6hp gain is conservative.
nice runs
Jae

 

Can you post the plot? What was the CF(Correction Factor)?

I tried to check your website, but my slow connection speed was taking too long.

 

I dynoed 209.5hp 223tq with an HAI, with a hot motor, drove to the dyno, and dynoed it. Charts are on my homepage.

 

i only have hard copies of the graphs. i will scan them as soon as i can. the correction factor was 1.01

 

Well I drove to the dyno shop too, but after being hooked up, they ran it at WOT a number of times as if running the real test because their connection kept coming loose. I've seen peoples HP drop by 10hp on their 2nd/3rd runs due to engine temp... thats all I'm suggesting.

 

I totally agree. A hot motor will make less power I'm expecting 225hp this winter, i'll be at the dyno again.

 

Did the dyno shop turn your car off and let it rest after each run? Doing so will give you consistent numbers.

 

My max always hit's it's best #'s after like 5 runs in a row on the dyno. My last dyno on both visits was about 7HP more then the first one.

 

Here's the sequence of events: I drove there, it was about 95 degrees, pulled in immediately, but I live about 20 minutes from the shop. They took like 15 minutes to get me setup (straps etc...). This was the 1st Max that they had dyno'd and didn't know they had to connect to the injectors, so for the first 4 runs, they were on the coils (?), which were producing a 5v output, and their connection would be lost around 5k rpm. So finally, they gave up on that and switched over to the injectors, where they performed 2 more runs, 1 they had something setup wrong on their system, and then finally the run that was recorded. Overall, I was in there for about 1 hour, with about a 3-4 minute break between each run/startup to test connectivity. Next time I go, I'll have a bunch more mods (well, hopefully the WS Y-Pipe), and a cooler engine... What I don't like, is that there will now be a few factors in the increase in HP 1. cooler engine 2. exhaust mod.

 

Is your car turned off during those breaks? If you can, have them wait 5 to 10 minutes between each run.

My 3rd run is usually the strongest (unless if I'm tuning the air/fuel). Bring in some good number on your next dyno session.

 

as for me....it was also 95 degrees and i drove about 40 mins to get to the dyno. my car was sitting still for about 20 mins while they set the car up. they also had never done a maxima before but thankfully the guy knew what he was doing and connected it correctly the first time. had about a 10 min break in between the runs. i kind of wish he didnt take the filter out on the 3rd run because i was hoping for a little bit more than 203.9 but no big deal.

 

Is the place air conditioned? A CF of 1.01 seems a little low for 95 degree weather. Must have been extremely dry.

 

it was just in a garage bay with the door open. my car themometer said 95 when i got there and the Dynojet print out says air intake temp was 101 degrees. when i was reading the Dyno forum i noticed that Kevin's CF was 1.02 and his was 79 degrees

 

Newman, you are in VA too... Humidity.

Where did you have the Dyno done at?

Speaking of temp sensor.... anyone know where the sensor actually is on the 2k2?

 

Maybe their temp and barometric sensors are a bit off. Your CF should be higher, IMHO.

 

Thanks.

Man anyone who pays for a dyno should get it on DISK.

 

got it done at Springfield Motorsport. its the closest place that has a Dynojet.

 

I live in springfield. Where are they at? What kind of cars do they work on?

 

they are all about Mustangs. it looks like Mustangs are at least 90% of their business but they were really cool. i figured they'd be all snobby to me since i have a lowly import but they were nice. the guy who does the Dynos (his name tag says Wheat) was a very very nice guy.

i think it's technically Lorton. im not sure how to get there using regular roads but its right off exit 166A from 95. off of the Fairfax County Parkway and Terminal Rd.


www.springfieldmotorsport.com

 

They are on terminal rd. By the big gas tanks. I know right where they are.

 

I don't understand. I thought the car has 255 HP ?

 

OK, well it says newbie under your name so it means you have a lot to read and learn.

A motor can put down 255 HP at the Flywheel. that means they test the "motor" at the plant while it is on a big mount. They hook a gear to it and test the HP and TQ of the motor.

Now when you hook that motor into a car and test it with a Dyno, you lookse power do to gears, drive shafts, axles, etc. These components together take roughly 18% of the HO your motor will produce. So when you "Dyno" your car you are actually testing what your car is putting down to the Wheels. Thus the 210HP rating most of the 2k2s will get.

If you look at a Honda Civic. It puts like 165 HP rating on it. But you dyno it and it puts like 118HP at the wheels.

Hope this helps.

 

the 255 HP rating is the power it produces at the flywheel. after that power goes through the drivetrain and to to the wheels some of that power is lost. this dyno tells me how much power my car puts down at the wheels. this is true about every single car. som cars lose more than others for various reasons.

slightly unrelated...even though the maxima is rated at 255 HP at the flywheel i personally think Nissan was fibbing a little bit with that #. i think its more like 245.

 

Yeah, they have developed a habit of "fibbing" on their horsepower "claimings" fortheir cars, hmmm like the "NEW" Sentra SE-R SPEC V having 180hp but really only making 141hp at the wheels....
Like how my 2K Maxima has 222hp but on a dyno it only generates 190fwhp...

 

is that in response to the "i thought it had 255 HP" question? or in response to the "fibbing"?

if it is in reponse to the fibbing....190 to the wheels from a 222 HP car is prtty much right on the money. only a 15% loss. i wish my car only had a 15% loss.

 

The SE-R is rated at 175 HP and it put's down 145 FWHP, those # represent a respectable 16% drive train loss.

 

yo Ethan...when yout put that rear valance on did you do anything special with it? yours looks different (for the better) than this picture from Stillen's website. is it just the suspension on Stillen's car that makes it look less slanted?

 

 

Theres really only one way to put it on. I really don't know why it looks different