I just baselined my car so that I know how much I gain from the borla exhaust I'm getting put on next week. Dyno completed at New England Dyno in Worcester, MA (www.nedyno.com) on a Dynojet Dynometer. Great people to work with!

This baseline has these mods:
- Crawford Plenum
- 350Z intake tube
- K&N Panel filter
- Magnaflow exhaust resonator in place of stock resonator

I would have loved to get a bone stock dyno, but it's just too damned expensive!


Dyno'd in 5th gear.
Raw numbers were actually higher because of the cold temps (249HP).

 

That's a pretty good number.... How many miles on the car (is it broken in)?

But it is a little high (just the usual variation among different dyno machines). The corrected number for the Z is 233-236 (normal-track model). BTW, the trackmodel is higher due tot he lighter wheels.

Gurgen

 

<blockquote><font class="small">In reply to:</font><hr>

That's a pretty good number.... How many miles on the car (is it broken in)?

But it is a little high (just the usual variation among different dyno machines). The corrected number for the Z is 233-236 (normal-track model).

<hr></blockquote>
Thanks! I have about 22,000 miles on her. Also the dyno operator said that stock 350Z's that he's dyno'd on this machine were in the high 220's and low 230's.

 

Wait a minute....

I thought this was a bone stock car!!! My bad. You do have the plenum, magnaflow, K/N, z-tube. This is awesome. My car with almost these very same mods (i had the injen intake instead of the filter/z-tube) + ECU update scored exactly this much.

So the ECU, which has been shown to add about 8-10 HP (or may be even more) on the Dynojet, probably accounts for the difference between the 5AT and 6MT. This is great info!!! It just confirms, for the frst time, the difference between the MT and the AT. This is why the gains on the AT's are so much greater than the MT's. It would be interesting to see what the ECU would do for your car.

My dyno is shown above with the following mods: Injen, Crawford, ECU, High flow cats (which don't do much on a stock exhaust), magnaflow 22" resonator. The lower (green curve) is a stock G35 AT.

<P ID="edit"><FONT class="small"><EM>Edited by gurgenpb on 01/10/04 03:01 PM.</EM></FONT></P>

168190-Dyno2.jpg

 

Gurgen,
Just curious if you were running the stock 215 Eagles when you did that pull?

Also ...

M3m,
Were you runing those 215 Eagles with stock 'Sports' wheels as well?
Outstanding power output btw. I wonder what the graph would look like w.o. the Plenum but w. the Borla in place instead.

Clint (THX723)<P ID="edit"><FONT class="small"><EM>Edited by THX723 on 01/10/04 05:03 PM.</EM></FONT></P>

 

<blockquote><font class="small">In reply to:</font><hr>

Were you runing those 215 Eagles with stock 'Sports' wheels as well?

<hr></blockquote>
Actually, I'm running Blizzak LM22's (235/50/17) on my stock 17's.

Yeah, I agree.. I am very curious what my car put out bone stock.

 

Clint,

I was running the stock Turanza 215/55s. I am now running 235/50 KH11 as you know ... but they are identical in size (0.1% difference).

Yeah I was getting identical numbers to n3m - good to know that the 5AT with the ECu is right on par with teh 6MT - makes perfect sense to me. Now, as to the A/F ratios... Stock 5AT's run a super-rich 10.5 a/f believe it or not - while the MT's do not - they run 12.5. It is clear that the mixture on n3m's car has leaned from that to 13.x-to even 14 in the low range. You may get 1-4 more hp if you bring in the mixture to mid-13's - but that's really splitting hairs.... Your car is right in the optimum range - but you will stand to gain a little from the advanced timings from the ECU upgrade (2 more degrees of advance) and the raised redline, in addition to a removed speed governor.

My ECU is runnign 12.8 all across the range - in the next couple of weeks I am gonna g dwn there and have todashi make it leaner in teh low-mid range - to gain a little more mid range power!!! BTW, I am also installing a full-time true wideband O2 sensor with an a/f gauge - for true/enhanced diagnostics/tuning!

Gurgen

 

Looks like with your mods you gain about 6hp over stock hp. 260hp at the crank X 0.90 ( about 10% manual drivetrain loss to the wheels) = 234 rwhp
But looks like you didn't gain much torque.
If some of you automatic people are wondering how much hp to the wheels, just mulitply your hp rating at the crank by 0.85 considering there is appox. 15% drivetrain loss for autos.
260 x 0.85 = 221rwhp. This calculation also works for estimating torque. This is not exact but it should be close enough to give you an idea.

n3m
So you gained about 4hp to the crank.
240.3 x 1.10 = 264.33 crank hp.

Oh but wait ambient air temp,relative humidity, engine temp can play a big part in your dyno readings.

Shift_DEZ' NUTS
www.midnightimpulse.com<P ID="edit"><FONT class="small"><EM>Edited by Xmax on 01/11/04 10:27 PM.</EM></FONT></P>

 

XMax, most 350Z's are running at about 233whp. A sedan running at 240whp is beating the Zs. I would like to see a drag race to really compare the two cars. (I realize there are different suspensions, but it would help as a comparo.)

 

Good numbers n3m and Gurgen.

XMax, those 10% (manual) and 15%(auto) do not line up.
If Z running arount 233-234whp stock then 233 / 0.81 = 287.6 crank ponies which is 19% drivetrain loss to a manual????




2004 G35s auto (bone stock)
-----------------------------------
2002 s/c Accord V6 auto
so far best 1/4 mile - 13.9@101.8
coming soon: custom internals, cams, performance auto tranny w/LSD

 

<blockquote><font class="small">In reply to:</font><hr>

260hp at the crank X 0.90 ( about 10% manual drivetrain loss to the wheels) = 234 rwhp

<hr></blockquote>
10% power loss from a manual drivetrain is not typical for this car... or any mass production car for that matter. It is more like 16 - 18% from what people have been dyno'ing stock.

<blockquote><font class="small">In reply to:</font><hr>

Oh but wait ambient air temp,relative humidity, engine temp can play a big part in your dyno readings.

<hr></blockquote>
And that is why the SAE correction factors are in place, so that I will be able to compare my dyno to another one that I may do in the summer.

 

Yep. Manual Z based on my calculation above is loosing between 18.5-19%. I would assume the same for both MANUAL G35 coupe and sedan.

Thats why I was surprised to see people telling here that auto only loosing 17% instead its looks like between 20-21%.

I know people here thought that say if AUTO sedan stock DYNO 216-217 whp with 17% loss its equal 260 chp. However, its seems to me AUTO sedan is really pushing at least 270 chp based on 20% drivetrain loss or 273.4chp based on 21% loss

216whp / 0.80 = 270 chp (20% loss)
216whp / 0.79 = 273.4 chp (21% loss)

Other examples:

2002 Acura RSX Type S (manual)
163whp /0.815 = 200 chp (18.5% loss)

2002 Honda Accord V6 (auto)
156whp / 0.78 = 200chp (22% loss)

Hope its clear now.

2004 G35s auto (bone stock)
-----------------------------------
2002 s/c Accord V6 auto
so far best 1/4 mile - 13.9@101.8
coming soon: custom internals, cams, performance auto tranny w/LSD

 

Hmm thats what i noticed too, with the 350z rwhp numbers...but for a a stock auto 97' Maxima with 190hp to the crank people have been getting around 161hp to the wheels which is about 15% drivetrain loss for an auto, when they dynoed their cars stock. Hmmm i wonder if Nissan overrated the 350z's hp? The 350z and the G35c has the same rwhp rating as the g35 sedan?....260 x 0.90 = 234 hmmmm. Very puzzling...but it sounds so true.

Another reason the 350z's hp rating is overrated, the 5th gen 02' 03' Maxima rated at 255hp.
255 x .90 = 229.5
This fwhp rating is about average for most 02' and 03 Maxima's.

I dunno thinking about this to much makes my head hurt.

Shift_DEZ' NUTS
www.midnightimpulse.com

 

Hmm... "drive terrain loss" is an interesting concept. How does that work? Different power ratings depending on if you're driving on dirt/gravel/asphault/etc.?

[img]/w3timages/icons/tongue.gif[/img]

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter