For all to see, here are the dyno numbers everyone has been asking for! Ive run the first of a series of dyno tests on my 2000 Maxima SE 5 speed. This first series is with the car stock. Future tests will follow (maybe by Saturday) of the same car with a Cattman Y-Pipe and Place Racing CAI. When looking at the plots, dynorun.003 is with the air filter removed, while dynorun.004 and dynorun.005 are totally stock. All test results are values at the wheels. Crank numbers, if desired, can be approximated by dividing the values at the wheels by about 0.85.

Heres the URL:

http://homestead.juno.com/madmax2k/f...aselinetif.TIF

On the day of the baseline testing, three 2000 Maxima 5 speeds were present. A plot showing results of one run from each of these cars is shown at the URL below. The first dynorun.001 is a 2000 California spec car with Cattman Y-pipe and Stillen intake. The second dynorun.001 is a stock Maxima, dynorun.004 is also a stock Maxima. It is apparent that the Cali spec cars are behind the 8 ball a bit compared to their Fed Spec brothers. The peak hp is similar on the modded Cali spec car, but at any point below the manifold switchover (5000 rpm) its output is lower. As an aside, with the Stillen intake, the 5000 rpm changeover sounds awesome! The entire pitch of the engine changes.(Very much like a VTEC....Dont flame me for that.....)

Well, heres the URL of the 3 cars together.

http://homestead.juno.com/madmax2k/f...masoct2000.BMP

All of the above tests were perfomed on the same dyno, same day. Ambient temp was about 75 F.

I will continue to provide future test results as they are available. I hope they are found to be useful to the community at large.

Larry
Tampa Bay, FL

Something is happening at 4000 RPM too. There a little blip on all 3. I wonder what that is.

Good question, but since its in all 3 cars, it must be in the Nissan ECU calibration. Id suspect it has to do with fuel delivery as the blip, although tiny, is right near the torque peak, where fuel delivery (and cylinder pressure) are highest. Well all have to assume that Nissan knows what they are doing

But, damn Paul, you catch everything! The community is lucky to have you looking out for us!

Larry

what gear did you use on the dyno?

3rd. I did a run in 4th a few months back and it gave the same results. But, the drums are spinning awfully fast at that point, so I didnt see the purpose in it. If it were a turbo car, I might see the point as it would load the engine more.

3rd wil give you higher numbers than 4th in the Max. My pulls in 3rd were 15 hp higher than my 4th gear runs (in the same dyno seesion)

Really? Ive tested the Max, a Dodge, and my VR6 in 2nd, 3rd, and 4th gears and the results were very similar.

The numbers Ive posted are pretty much spot on Nissan's claims I figure. 222 hp at the crank should be in the neighborhood of high 180's low 190's at the wheels with a 5 speed.

On the next dyno session (with the CAI and Y-pipe), Ill be sure to do some runs through the gears. Maybe Ill start in 2nd and shift through 4th and lay the plots side by side consecutively on the same plot by mph and see how they look.

Yeah... at our last DC dyno event (25+ cars ran on they dyno), every car dyno'd at least 10 HP higher in 2nd gear for the autos and 3rd gear for the sticks. Sprung, didn't you hit 200+ in 3rd gear and about 185 in 4th?

Wow, this just made me realize how much more I would have like the 5 speed. Too bad I couldn't have bought one like I wanted. Compared to my stock automatic dyno (you can find that on my webpage), the auto tranny eats about 20 hp and 10 ft/lbs out of the engine that the 5 speeds are putting to the road. I knew there was a power loss with autos, but I didn't realize how much.

That's 10% loss on hp, and 5% on torque between the stick and the auto. Oh well, I'll learn next time to wait until I can get exactly what I want.

Thanks for the useful info Madmax! I was waiting for somebody to due dyno runs! Kind of made me happy that I search for a 5sp!

I've had dyno runs on my page since the spring. Click on the link below.

[Edited by Paul2kGXE on 10-13-2000 at 01:24 PM]

Yeah, Paul was there hes saw all the cars I did, 3rd was definately putting down more than 4th on the 5spds. My scanner died so I can't show you all the chart but these were the results: 4th gear pull = 184.3hp and 192.7tq, 3rd gear pull = 200.5hp and 195.8tq.

And my Max (as all of the new ones in the DC area are) is a Cali. Spec. model, so as you can see compared to the Fed. Spec models there is no measurable difference in output.

I was the other 5spd fed spec. (incidentally, MadMax and I have the identical car). Great to find some other max owners here in Tampa.

The results were actually higher when first done because there was a spike at redline when they shutdown. My run after smoothing was 191.7 but before it was 197. All the other results were run with the same amount of smoothing. Sprung, you either had the spike or you got the mac-daddy aberration. Hopefully, it's the aberration!!

If you take a look at Paul's charts, you can see the spike. In his first dyno without mods, it doesn't appear as much and doesn't appear to make any difference since max hp appears to be at around 5700-5800 unlike the 5spds at redline. It is more pronounced in the second one. Take a look at those charts.



[Edited by Max_Gator on 10-13-2000 at 04:46 PM]

Big difference at upper rpms between the auto and 5spd. The auto essentially peaks at 5500 through redline. The 5spds, though, just keep climbing.

Don't remind me! LOL.

About my spike... I'm looking at my 2nd dyno result and I don't see a huge spike in the first run. It goes down and up to where it was before the dip and then up a tiny bit. The 2nd run has a big spike, since they ran into some rev limiter or something. But you are right, that result is not as a high as I've been reporting, due to the spike. If you see where it was shut down around 5850 RPM, it was still climbing. I did hit an honest 169 in my first run though. I'm not sure what they did, but they messed something up. At our dyno run at Extreme Motorsports, they allowed us to drive our own cars. I wish EIP allowed us to do the same.

I'm going to another dyno test next Saturday. I plan to run with a K & N panel filter and without the filter.

[Edited by Paul2kGXE on 10-13-2000 at 06:13 PM]