I went to a dyno session with my cousin and his Z club today. Threw my car up on their new dyno setup and ran it a few times. I was very surprised, but I hit a consistent 200.3hp/213.9lbs at the wheels. I didn't have time to give my car a tuneup beforehand. This was with my car needing new plugs badly, oil change, fuel filter, and my intake looked like it was from hell. My cousin gave me a new and big Injen cone filter after I got home. After replacing my old one, it felt like night and day- just like when I put my K&N for the first time. Smoooooth. I'm really wondering how my car woulda done if it was properly tuned on the dyno. I also did a mock 1/4 run on the dyno, and it was pretty disappointing: 14.9sec@92mph. But I did realize that with 115K, my front suspension will be watched closely, as my front end was all over the place during the 1/4 run. What do you guys think: run was with a dirrrrty K&N cone, WSP Y, 2.75" straight pipe, and custom catback. Just wondering how people are coming with the new JWT cam setup and computer.

 

you got 200 at the wheels with Catback Wsp y-pipe straight pipe and intake? nice.

 

yea pretty good, stock we are what, like 170 maybe? y-pipe is 15, intake is almost 10 and catback is like 5...dam i share what u have so i'm at 200 too just about and maybe 220 at the crank?

 

umm, what gear did you do these runs in? and what was the correction factor? can you post a pic of the dyno sheet? what rpm did you hit peak hp and tq?

 

Don't be silly Mecca. With those mods running strong your lucky to be at 190, you can't just add numbers up like that, that's not how it works.

 

Not sure about that correction factor...? But it was 200.3hp@ (of course)5250rpm, and 213.9tq@4750rpm. All runs were done from 4th gear. Don't have a scanner, but maybe I'll try it on a friends comp. My 60' was a 2.2 by the way.

 

Looking at the graph, what was also interesting I guess, was my torque level hit about 220lbs @ about 4,600rpm. But it didn't list it in the final torque quantity. The tuner thought that was funny too.

 

Those numbers are kind of insanely good, no, fantastic, for a 4th Gen. You just might have the absolute most powerful NA 4th gen out there. Still, I'm skeptical . . . . . .

DW

 

On your print out, on the left and right sides of the page, does it say "Actual" horsepower/torque or somthing else?

 

I go tfirst dyno last weekend. My peak hp 171 torques was 183.

I have done full exhaust, udp, wai. I am ran 17" on the dyno I was hoping to get 180 and 200 to thw wheels, but your numbers are awesome.

 

Chassis dynos can be calibrated to say pretty much anything you want them to say. If you are not on the same dyno, the same day, with the same calibration... comparisons between pulls are not 100% valid.

The 'Mustang' brand dyno shows less power, but is more accurate and repeatable dyno-to-dyno than the dynojet... especially when it has the 'eddy current' brake option.

Good Luck!

 

SOmething's not right with those dyno results...way too high. There are a buttload of 4th gen dynos out there, and the absolute best n/a 4th gens, with JWT/GForce ECUs and all the other goodies muster at very best 205 ftlbs, best HP 195. It is not reasonable for a 4th gen with just a ypipe/intake/exhaust to muster 200 HP and 214 ftlbs. Both figures are on the order of 20 too high. Either the dyno put out overly optimistic results, the correction factor is incorrect, or there was an artificial spike in the readings that boosted HP and torque due to slippage, etc. BTW my observation is not intended as a knock towards you at all, the numbers just don't sound right.

What were the raw uncorrected figures? Is your car an auto?

 

Right what kind of dyno machine was it? Dyno Jet? Those are pretty accurate among others which are a tad higher/lower.

 

you got to be full of **** cause iv'e sen s/c maxima's pushin 230 .

 

 

aaaaah man, thats quite a bit of power, post your Dyno sheet we d like to see it

 

In fact, I did put my car on a Mustang Dynamometer. The tuning shop was Sound Performance in Bloomington, IL. On the sheets, they say either total power on the graph, and max power/torque on the chart. Yes, I was wowed too. I was hoping for 180 myself. I ran twice. The x-factor for me was my straight pipe. I know most of you have similar setups, but I do have a straight pipe. I ran with no fan blowing in front of me either. I may be skeptical also, but there were a couple other cars there that show that the dyno was right on. Most specifically a brand new 6spd 350Z with an injen intake only. She pulled a 250rwhp if I remember correctly- very close to what was expected. I have a 97 SE 5spd. I had custom bent 2.75" pipes after the y- to the Terminator muffler. that's all I can say. I'll try to scan my sheet for you skeptics.

 

You sure that thing didn't measure crank Hp???...

 

Oh yea...I do believe it has that brake option...not sure if was that "Eddy", but it did have a brake function via computer.

 

350Z Dyno from Injen's website

 

Ok now with no doubt that dyno gave you 20 extra HP. I guess the tunner has to tune his dyno . Looks like you did hit 180 which is still good for what you have.

 

The owner of the dyno also ran his 02 Z06- bone stock and hit a 344 at the wheels. 02's put out 405 at the crank.

 

Strange... Sound Performance is no joke, they've got (or used to have) 2 of the fastest supras in the states, haven't heard from them in like 2 years. Anyways, I agree that the results are extremely high for the given mods. Next time I'm in chicago I'll have to dyno at SP and see if my results come back sky high or not. The 350Zs numbers are high, 250 is unheardof for them, low 240s are rare, typical is 230ish. Are you certain these numbers are SAE corrected or could the be uncorrected (standard) numbers? If they are standard numbers they are believeable, if they are corrected then somethings up, either with your car or with the dyno. You sure there wasn't a Nitrous Oxide storm in Chicago today hehe.

 

I know....but that Z06 ran right after me, and those numbers are right on no matter how you put it. So I have no reason to not challenge the dyno's accuracy however which way....as some other stock cars there that i don't really remember cause I didn't care about em.

 

Most of the 230hp runs for the 350Z's are under 2400 miles. Anything above that and they are dynoing anywhere from mid-240 to 265. depending on the miles of the 350 Z in question, I'd say the numbers are on point.

If anyone has noticed, he is running 2.75" piping for his exhaust. Papasmurf runs the same diameter and has been known to have lots of high end power. For 5-speeds this exhaust diameter seems to gain more power than 2.5" piping without too many negative results. 200 FWHP may not be accurate, but it's not too far off. Papasmurf got 196.3 FWHP of the Dynojet and 211.8 Ft/Lbs. torque.

 

196 out of a car with upgraded injectors and JWT ECU.. thats a little different now huh?

 

I don't even know why he has that on his page. He has the ECU sitting in his garage. He isn't using it. The upgraded injectors are on the car though.

 

Here's my dyno sheet. Believe it or not, after talking to numerous people who ran their cars that day, and the stock numbers put down, I have no reason to believe that the numbers are bogus.

 

Where is the dyno?

 

 

 

Thanks Pervis...I'm very computer illiterate, and my friend had a hard time putting up the sheets. Thanks for the assist.

 

 

hmm, 2.75 inch exhaust eh? Where is it 2.75" from? and whats the inlet on your muffler?

 

No mention of correction factor, probably not SAE corrected.

 

I'll look into the correction factor, but the #'s for the 350Z, stock Z06 and a stock NA32 all prove to be pretty legit off of factory numbers so I don't see why I would need to further worry about it. To prove my number crunching right, a stock 5spd Max would put down ~160 at the wheels right? I don't see why it's so hard to believe- what "should" I be putting down in your opinions?

 

You "should" be putting down about 180 with your mods, maybe 185 if you have a really strong car, and about 195 ft-lb. Guys with way more mods are not even putting down the numbers you are, SAE corrected of course. Uncorrected numbers I've seen guys above 200, but not SAE numbers. BEJAY1 and Keven97SE come to mind, they have 2 of the most powerful 4th gens out there and were at like 195 and 207ish torque, in addition to the basics that you've got BEJAY had an ECU, and Keven97 had an extrude honed intake manifold if I recall correctly

I still contend that 250 is really high for a stock Z. I've seen alot of Z dynos and never seen one close to that high from a stock car. NightRider says otherwise but in all my searching 244 is the absolute highest I've seen and I've looked pretty hard.

 

i had 200.6 HP & 198.11 tq uncorrected. standard i had 203.53 hp & 201.33 tq. whats the difference between standard and uncorrected?
of course i had 194 & 192 SAE.

--Paul

 

okay...I this should be the dyno I ran it on: MD-1750-I Model - Inertial Only

Dynamometer Performance
Horsepower:
1,750 hp maximum measurement capability

HP Measurement:
By measuring the rate at which the vehicle accelerates a known inertia (rollers), the vehicle¡¯s torque and actual wheel horsepower is calculated.
Maximum Speed: 225 mph
Inertia:
2,370 lbs base mechanical inertia

Dynamometer Controls
Controls:
Pentium-based control system

MD-7000 Control Platform

Hand Control:
RF Remote Mouse

System Features
Rolls:
Precision machined & dynamically balanced
50¡± diameter balanced rolls

28¡± face length

28¡± inner track width

84¡± outer track width

Frame:
Heavy-duty structural steel frame

Restraints:
In-ground units supplied with (12) anchor pods. Above ground units supplied with rear tie-down restraints. All units include (4) 10,000 lb, 10¡¯ long ratchet straps;(2) Axle straps; and (2) wheel chocks.

Roll Lock:
Industrial brake pad in contact with O.D. of roll

Roll Decelerator:
Allows vehicle deceleration without the use of vehicle brakes

Axle Weight:
10,000 lbs maximum

Drive-Over Capacity:
10,000 lbs maximum

Shipping Weight:
7,500 lbs. (5,216 kg) Dynamometer Only

System Requirements
Air Requirements:
80 PSI, dry, regulated, oil free

Power Requirements:
120 VAC single phase, 60 Hz, 15 Amps (control)

Options & Accessories
Inertia-exclusive, Single or Dual Power Absorbers 4-post lift with stairs, platform and dyne platform
Engine RPM Module Weather Station
Integrated 5 Gas Analyzer 24" 5,500 CFM fan
Advanced Data Acquisition Throttle Actuator
Air/Fuel Analyzer Track Lap Simulation
Boost Pressure Monitor upgrades
Manifold Pressure Sensors Color printer
EGT Sensor



MD-1750-I Model

Dynamometer Performance
Horsepower:
1,750 hp maximum measurement capability

HP Measurement:
By measuring the rate at which the vehicle accelerates a known inertia (rollers), the vehicle¡¯s torque and actual wheel horsepower is calculated.
Maximum Speed: 225 mph
Inertia:
2,370 lbs base mechanical inertia

Dynamometer Controls
Controls:
Pentium-based control system

MD-7000 Control Platform

Hand Control:
RF Remote Mouse

System Features
Rolls:
Precision machined & dynamically balanced
50¡± diameter balanced rolls

28¡± face length

28¡± inner track width

84¡± outer track width

Frame:
Heavy-duty structural steel frame

Restraints:
In-ground units supplied with (12) anchor pods. Above ground units supplied with rear tie-down restraints. All units include (4) 10,000 lb, 10¡¯ long ratchet straps;(2) Axle straps; and (2) wheel chocks.

Roll Lock:
Industrial brake pad in contact with O.D. of roll

Roll Decelerator:
Allows vehicle deceleration without the use of vehicle brakes

Axle Weight:
10,000 lbs maximum

Drive-Over Capacity:
10,000 lbs maximum

Shipping Weight:
7,500 lbs. (5,216 kg) Dynamometer Only

System Requirements
Air Requirements:
80 PSI, dry, regulated, oil free

Power Requirements:
120 VAC single phase, 60 Hz, 15 Amps (control)

Options & Accessories
Inertia-exclusive, Single or Dual Power Absorbers 4-post lift with stairs, platform and dyne platform
Engine RPM Module Weather Station
Integrated 5 Gas Analyzer 24" 5,500 CFM fan
Advanced Data Acquisition Throttle Actuator
Air/Fuel Analyzer Track Lap Simulation
Boost Pressure Monitor upgrades
Manifold Pressure Sensors Color printer
EGT Sensor

 

If weight is a factor in calculating your hp, then I think I see the problem. According to them, your 97 Maxima weighs quite a hefty (for a 4th gen) 3375 lbs

DW