This is the second car we took to "The Performance Garage" in Smryna Tn. on the same day. The car belongs to my friend and mechanic of 23 years, Clark Crawford. He owns "Z Cars by Clark Crawford" in Nashville Tn. He is also an authorized Motordyne dealer. We did 4th and 5th gear pulls just like with my car.

INFORMATION ON CAR AND PARTS INSTALLED

2003 350Z T-2 SCCA National race car.

Sunoco 98 octane race gas, Rev up cams, Rev up plenum, Z1 motorsports test pipes, Motordyne XYZ pipe, Shockwave dual exhaust with resonator and diffusers, Drop in K&N Filter, Pulstar sparkplugs, 245/45/18 Street tires for all dyno runs.

John @ Z1 motorsports tuned the car in Sept of 09 with all of the above mods, minus the pulstar sparkplugs. (258HP and 236TQ)

All dyno runs were done without unstrapping the car. We tried different combinations with A.R.T. Pipes, Z1 Motorsport pipes, 03 stock plenum and 06 Rev up plenum.

Clark bought the car 2 years ago race ready, it came with the rev up plenum that was supposed to be "THE" plenum to use with rev up cams, back in the day. These dyno sheets prove otherwise.

Touring rules state that you can update and backdate within year models. It took allot of R&D by Nissan Motorsports to make the rev up cams work in an 03 engine. *NOTE* Neither aftermarket or Nismo cams are legal.

We want to reiterate that these different combinations were without any re-tuning, just swapping and bolting on.

Clark would love to take the car back to Z1 Motorsports, for John to do a super re-tune with the A.R.T. pipes, stock 03 plenum and pulstar sparkplugs. However a 600 mile round trip is time consuming.

The dyno charts are a little crowded, but next time we will have it more separated. This was our first dyno experience.


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Here is a list of the dyno run files with the different combinations.

4th Gear Runfiles.....

runfile 18,19 are Z1 pipes, 03 stock plenum

runfile 14,15 are ART pipes, 03 stock plenum

runfile 10,11 are ART pipes, rev up plenum

runfile 4,5 are Z1 pipes, rev up plenum

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Here is a list of the dyno run files with the different combinations.

5th Gear Runfiles.....

runfile 20,21 are Z1 pipes, 03 stock plenum

runfile 16,17 are ART pipes, 03 stock plenum

runfile 12,13 are ART pipes, rev up plenum

runfile 6,7 are Z1 pipes, rev up plenum


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Closing Comments.......

The biggest gain was the 03 stock plenum over the rev up plenum. You have to look at the graphs closely to see the gains with the ART pipes. "Without re-tune" Sorry again for the crowded runfiles. (We will know better next time)

We did a few runs in 3rd gear, but did not save them. On the next dyno visit with Chris we will do 3rd, 4th, and 5th gear runs with both cars. The race car uses 3rd and 4th gear most of the time on the track. RPM range 4500-6800

Final results... ART Pipes with stock 03 plenum and pulstar plugs (mrev2 and spacer not legal if you were wondering) 271HP and 253TQ which is a gain from Z1 pipes and rev up plenum 258HP and 236TQ. The rev up plenum is a pig !

The air fuel ratio is more consistant with the ART pipes and 03 plenum. Please note...without a re-tune.

 

Ok, I'm confused, I have an 06 revup, if I had a MREV2 and a spacer...would I get more power out of these ART pipes if I was just stock? Or would I have more power with the MREV2 and spacer and ART pipes...Sorry, I may sound confusing...

Thanks! Nice results BTW!

 

Mrev2, Spacer, ART pipes. Look at the dyno sheets from my 06.

 

Great numbers and gains - nearly exact to mine (271/252) on my 03' with similar mods and ART pipes but stock 03 cams.

 

interseting. Will you be re-tuning and testing?

 

Yes, a re-tune for Clark and after my motordyne exhaust, a tune for me. Should be a month or so until it happens. We will post the dyno results for each car.

 

Reply to Scotts300

Great numbers and gains - nearly exact to mine (271/252) on my 03' with similar mods and ART pipes but stock 03 cams.
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Clark is not using a plenum spacer.

 

I'm a little confused, is that 271WHP with the cams or without?

You have a plenum spacer right? About the same gains as the cams, from what I know. Since this car doesn't have a spacer, you guys have about the same power added with the mods. Either way, great dynos. You can definitely see the massive increase in power throughout the band with ART Pipes over test pipes.

MD haters suckin' it down some more. =)

 

Yes, plenum spacer and stock 03' cams. Need to work on my intake now.

 

Get the 06 airbox, call it a day. Trust me.

 

explain please...i switched from 06 airbox to Z1 intake tube with R2c dry filter and it was an improvement, now just switched to popcharger filter and the car feels ever more responsive.

 

Did you do the changes post tune and still felt a response?

 

Heat soak is just awful on aftermarket intakes. The stock intake is super smooth, takes the air in from a great location, has virtually no weird restrictions, has a great velocity stack/venturi ring, and doesn't get heat soaked very fast.

Out of curiosity, has anyone ever dynoed the Z1 intakes?

 

yes post uprev dyno tune, I dont think there is an intake that sucks more air better than the popcharger. I still have yet to see one dyno disproving the popcharger vs 06 airbox swap...if there is someone please school me

 

Looking at the Z1 intake, I will say this: it has a velocity stack and comes with a K&N filter, so intake of air shouldn't be much different than an 06 airbox + K&N drop-in. That said, I'd be willing to bet the improved feeling Gabe feels is coming from the tube itself, which deletes the rippled-accordion connector on the OEM intake path. I've always believed that to cause a disturbance/restriction in airflow somehow.

 

Did you re-dyno and re-tune after swap or no?

I switched to a bastardized intake installing a higflow filter at the end of the z-tube and didn't feel anything. I can barely hear it for that matter over my exhaust.

 

I definatly agree with you on that, the straight pipe smooths airflow for sure. But also when i put the pop charger filter it just feels like it BREATHES so well and its crisp.

 

no, I was going to purchase the ART pipes and pop charger first before I went back to Austin for a retune. But I'm telling you I know what I feel and its running better...butt dyno ftl i know, i know

 

^ im curious if there is a gain. I would think yes, after the heatsoak dissapates.

 

Where? I see a marginal increase I think. Graphs are not easy to read.