Does anybody know what a stock 03 SE auto puts down hp and torque wise. I have loked and i just cant seem to find out any where. even better yet does anyone know what it would it would put down with just an Injen CAI. if this is a i am sorry but i just couldnt find it

 

~196hp........

 

how bout torque

 

some one out there has to know

 

nobody????

 

~200 whp and ~210 tq.

Not sure with the CAI. Check the injen website, tehy claim some decent gains, but I don't believe it.

 

Hmm, has anyone over thought of this topic. . .maybe this should be a separate thread.

It seems as if the 6spd takes some power away compared to the normal 15-16% of the 3.0, or the engine is overrated.

But when comparing stock Auto dynos, we see from 195-200 whp, which translates to~255 crank HP using 20-22% loss.

It doesn't seem to be Nissan overrating, it was their crappy trannies, and well, a generous underrating of torque numbers.

Are there any other cars that use the same 6 spd tranny as the Maxima? How about the new Alti SE-R? It be nice to see dynos from that and compare.

What do auto Alti's usually put down compared to auto 5.5g Maximas

 

I just had my dyno run on my bone stock 2k3 se. I see a bit different numbers than what is being said on this thread. With my calc's, it looks like about 17% and not 20-22%.

Here is the run:

 

Is this on a 6 speed or auto? My auto dynoed about 14 hp lower than yours. I'll post my numbers.

Rob

 

His profile says he has a 6 speed. His dyno is typical of 03 6 speed.

 

That is the highest 'Stock' A33B dyno chart I have ever seen. You're certain that NOTHING has been done to it?? Is the graph showing SAE, STD or Uncorrected?

And please link us to a copy of that run file.


Thanks

 

The graph is SAE corrected. You can see it in the upper right corner of the image. It also have a smoothing of 5 which tends to lower the peak by about 1hp or so compared with no smoothing. Its definitely not typical. I thought my car was on the upper end when I dynoed 205.7whp/222.8wtq based on all the other dynos I had seen. I have never seen a 3.5max dyno near what you have stock. If that is stock then that is definitely one of the luckier maximas.

 

Hmmm, I guess I was wrong about it being typical. I thought the stock 03's were dynoing at 210 hp.

 

Stock 03 manuals are typically 204hp

Also, why does sohails curve look so messy?

 

sorry for the delayed response to this thread... There is a link to the run file at the end of this email.

Yes I have a 6 speed. The graph is SAE corrected.

here is the link:

www.bhamani.org/Dynorun.002

Its possible that my graph has bumpy lines because I do not know how to use the runviewer to get the best looking charts... any help for a better graph is much appreciated.

Sohailb

 

Why do the manual and auto tranny Maximas dyno so close? My stock auto dynoed 198. I'm still learning about these front wheel drive cars, but I'm used to seeing a bigger percentage difference between auto and manual rwd cars. For example, bone stock 6 speed '03 Corvette dynos around 305 rwhp. An A4 C5 dynos around 285 rwhp.

Before seeing these posts and not having anything to compare to, after dynoing my Maxima, I guessed bone stock 6 spd cars would dyno around 210 whp.

 

bone stock is typically around 204, auto is around 197

 

Sohail: used the smoothing feature to make the graph look nicer

 

The smoothing is maxed out. It looks bumpy becuase its such a big image that it is easier to see the small "imperfections" in the curve.

The bigger difference in the corvette is due to the amount of power the engine puts out. The more power the bigger the difference. Ex. A difference of 5% in a 100whp vehicle is 5, but a 500whp vehicle its 25. However it is speculated that the main issue with the 3.5maxs dynoing so close is the possibility of Nissan's 6spd being somewhat inefficient comapared to other manuals... say an 18% loss compared to the average 15%.

 

The percentage difference is what I was referring to. I was wondering why there isn't a bigger percentage difference between the two. Apparently there seems to be a bigger loss with the front wheel drive 6 speed than a rear wheel drive 6 speed.

 

Rob: Tranny loss is manufacturer specific. Every manufacturers transmission is different than another (unless its GM) so you really cant compare driveline loss from one to another.

Also, RWD cars with a shorter axle loses less power than one with a longer axles. (ex corvette vs CTS-V). Then there is the type of differential used Basically, suffice it to say that its simply not just FWD vs RWD, there are alot more factors involved.

 

Okay, I read the FAQ and tried to upload my baseline dyno with no luck. I get a bunch of error messages. Does the picture need to be hosted somewhere or can I just upload it from my hard drive? Thanks!

Rob

 

You need to have it hosted somewhere and post a link.

 

I just downloaded this run file and compared it to one of my old run files. It matches near perfectly with the run file of a 2k2 with a different intake or modified airbox.

 

I got the cai and the upd sitting in my office waiting to be installed. The Jan 15 check will get me all setup! Then I will send the new dyno after.

 

what is the dip in the middle of the curve? i see that the torque dips and the engine stops producing power for a bit.... what is actually taking place? is the intake switching over is the cam changing its timing?

 

variable intake manifold switchover

 

If you are manual, the power loss is 18%

Automatic, 23%, but from the look of the graph, you are a manual

 

Definitely a manual.

I should be getting the cai and upd installed in a week, so ill post a new dyno after that.

 

Could it be our 30 something pound flywheel? Or the clutch? I think with the addition of even a 20 LB flywheel and better clutch the numbers would be a little more accurate. I think the clutch on the 5thgens was designed for use by less than novice users. I think nissan knew that most of the people buying the 6 speed would not be extreme racing guys so they put in a heavy flywheel (for smoother shifts) along with a light clutch. I could be completely wrong on the clutch (I am just throwing something out there). Anybody have some insight?

 

please let this thread die already....

 

After this....

It's definately the 6-speed/flywheel. The Spec V guys have the same low dyno problems. The f*cking thing weights 31 pounds! Ours (5-speeds) weights only 18.