Desert Pearl

I am looking for dyno results from any of you guys with automatic 5th Gen Maxes. I am particularily interested in stock numbers. I recall someone quoting a 26% loss due to drivetrain (putting his stock #s around 165 or so). I just had mine dyno'ed today as a baseline before doing my Federal exhaust manifold/Y-pipe mod. You can see my current mods in my sig. My results were:

HP - 174 @ 6500
Torque - 171 @ 3750

If you have stock dyno numbers, or can very closely estimate them based on your actual dyno results, please send them my way. If I get several responses, I'll post the results for all of us to know. Please tell me what year your car is and if it has Federal or CA emissions.

Also, if you have .jpg or .xls files with the raw data in them, I'll make a summary in Excel containing our stock dyno numbers. You could email those files to me at boosted@prodigy.net. THX!!!

Y2KevSE

iTrader: (13)

Nice numbers. You just gave me a general range of what my car puts out. Good luck on the Fed spec conversion!

Y2KevSE

iTrader: (13)

By the way, I believe Paul2kGXE has dyno numbers: http://www.paulwendy.com

AznWontonboy

argh.. 160hp dynoed.. why!??!?!!! i wish i got an manual now.

Desert Pearl

Thanks for the info. His stock numbers match the 160 quoted by AznWontonboy. Hey, Azn... what was your peak torque?

If our cars are putting down 160 stock, that's a remarkable 28% loss due to drivetrain... STUPID AUTO TRANNY!

That means my 173.8hp is more like 241.1hp at the crank.

AznWontonboy

o sorry bro, i took the info off pauls web site... i got an Se auto so we should be runnin the same hp and tq.

UMD_MaxSE

iTrader: (1)

why is there a 14 hp difference between two of the exact same cars?....174 hp and 171 tq translate to 22% drivetrain loss which is pretty good. Is there variation amongst dynos? Perhaps the conditions for Paul's dynos were different? It really doesn't make a lot of sense...I have heard of other stock autos getting up to like 175 hp.....

Max_Vader_2K

Hey I dynoed 175-hp and 172-tq with the stillen intake and muffler. I have not dynoed the fed-Y yet though.

There is a questionable spike on my dyno that would make it 180-hp though.

RussMaxManiac

The HP is right on the money where a auto dynoed here locally a while back. The TQ I can not remember though where it was.

Paul6speed

The reason that Desert has higher figures is that his car is Fed Spec, while mine is Cali Spec. I would like to go to the dyno a 3rd time to see what my OSCAI does.

Also... the results vary upon which gear you are in during the dyno plot. My figures are 5 HP higher in 2nd gear vs. 3rd gear. I dyno'd 170 in 2nd gear with my pop charger.

A 3rd item to consider. My figures are SAE corrected. Some people like to report uncorrected results when it works to their favor.

UMD_MaxSE

iTrader: (1)

Desert has a cali spec also....hence, the reason for doing a fed spec manifold conversion....

Paul6speed

Ooops. I should have read that more closely. That is the highest I've seen a stock Cali spec auto dyno.

During our last dyno event, GR8BONE and I were 1 HP apart. His is Cali spec too. He had a slightly different cone intake on his car. Desert may have the automatic Sprung version. Sprung has a monster engine in his 5th gen stick. He dyno'd 200+ to the wheels.

Paul6speed

Russ... you have Fed Spec in TX, right? His is Cali Spec. Those figures are on the high side for Cali Spec.

MrBurner

desert also has a full catback exhaust, udp, and a cone intake...his dyno isn't stock

Paul6speed

I can't believe I missed this! I need another cup of coffee. Desert has an AE edition. A duh! This has a different front exhaust downpipe and larger resonator.

Green 2kSE

I have to say, I'm sceptical about the Fed vs Cali emissions making a big difference. If there was a difference, Nissan would have rated the Cali car with lower numbers, like Honda does. Apparently the difference is negligible, unless Nissan underrates the Fed car. The dyno differences can be due to variations between the cars, dyno models, air temperature, etc.

UMD_MaxSE

iTrader: (1)

Don't dynos take into account ambient temperature amongst other conditions?

Paul6speed

There Fed Spec flows better. They have one less precat. The ECU is also less polution friendly. In actuality, the HP rating should be lower for the Cali Spec cars. Mitsubishi does this with their cars. Usually the Cali Spec rating is 5-10 HP less. Nissan is being dishonest and the various dyno plots I've seen back that up.

Paul6speed

Most of them do. You can have the computer print out corrected or uncorrected though. I'm not saying anyone here is doing that though. When you look at a plot, make sure it says SAE corrected on it.

Max_Gator

Another thing you'll frequently see with 2k dynos is a blip at fuel cut. Because max hp is at fuel-cut/red-line, this will cause the max hp reading to be higher than it actually is. The dyno operator should "smooth" out the results to eliminate the blip. If I recall correctly, I dyno'd at something like 5-7 hp higher to the wheels before smoothing. After, it was 190.X

Not saying that Desert has that problem.

DYNO PLOT: Stock(Run2) v. Y/SI(Run 5) v. Y/SI/UDP (Run 11)

DYNO PLOT: Air Fuel ratio (with all mods)

Desert Pearl

Okay, here are a few comments from my side.

1. My car is modded... see my sig. (Thanks Zach for pointing this out).

2. My car is a 2001 so therefore it is a CA spec.

3. Regarding the output of a CA spec vs a Fed spec... the only dyno results I have seen were from ones with manual transmissions and the CA spec car made 10ft-lbs less torque up until 5000rpm, where they evened out. This means that there was NO peak HP difference between the two models, but you'd definitely feel the difference in acceleration in lower rpms. These results were posted by MadMax2k. Here's the link...

http://forums.maxima.org/showthread....887#post225887

So, it still looks like stock autos are making 160-165hp at the wheels. Anyone have any more data????

sprung

There you go flattering me again Paul...hehe. Sadly my couple of hp advantage will seem silly once thoes 3.5L Altimas hit the street!

How you been?

Green 2kSE

Did anyone notice that the Fed spec cars dyno virtually identically, even though one was stock and the other had a SI and Y-pipe?

Max_Gator

I'm not sure which dyno graphs you were looking at, but that's not correct.

They dyno'd the same stock and then they both dyno'd the same with mods (one had SI and Y; the other CAI and Y).

On later plots, we picked up a couple hp by dropping the exhaust after the cat. We also picked up a couple running MT-90 and Mobil 1.

Green 2kSE

I simply went to the thread posted by Desert Pearl. Here is a quote from madmax2k's post:

Max_Gator

The two fed-specs were stock. The cali-spec had the SI and the Y. However, the cali-spec also had aftermarket wheels which we later speculated hurt his dyno results.

Paul6speed

Doing pretty good... spending way too much time on Maxima.org.

Are you going to help me take out my friend's Impala SS this Friday? I think this may require a 5 speed or Tony's boost.

RussMaxManiac

Like my car stock dynoed 164 with 17x8 MOMO Arrows compared to another 2k dyno that had stock wheels and he got 174. both Fed.

Empz

What spec are CANADIAN Maxima's??

We Under the FED or the Cali Spec????

Y2KevSE

iTrader: (13)

Look at the sticker under your hood.

Wustylez

These are for 5th gen auto tranny rite???

Empz

Where and What do I look for??

Thanx Kev!

DKNYchinito

There's a good diagram on www.cattmanperformance.com

Click on the y-pipes section, then you'll see a diagram showing the differences.

Y2KevSE

iTrader: (13)

If you read something about California emissions blah blah blah blah... then you got a Cali spec car.

UMD_MaxSE

iTrader: (1)

or NLEV/ new LEV emissions.....

theMax

What does nlev/lev stand for? which is ca emissions?

theMax

What does nlev/lev stand for? which is ca emissions?

DKNYchinito

NLEV is cali emissions.

DKNYchinito

oh yeah... if you still have your window sticker from when you bought your's, it'll say on there.

sprung

Impala SS huh...I ran one from a light one morning, got a good launch and ran doorhandle to doorhandle off the line then walked away from him by the top of first, grabbed second with a vengance and pulled on him even more, went to third and let off as we were coming up on traffic. I was amazed that I beat him after the way people talk about them, LT1 this, 350 that...whatever. I do think it would give an auto a tough time.

I probably won't be able to make it Fri, my inlaws are coming into town and they always keep me busy, you know how it is. What's planned for Fri. anyway?