I figured the same, hence the reason I didn't go with a much cheaper alternative like the Strup or DC if my goal was solely to remove the rubbing problem. Tomei's site has a few charts illustrating the differences in equal lengths and diameters, but a bit of skepticism is always existent since it's their own site. I have yet to see any independent benchmark comparing different equal length headers, so at this point it's really a hope on my side that Tomei's test were not exaggerated and that I would see some gains.

Additionally, I like to provide some helpful graphs and information to the community, but unfortunately my test case is quite uncommon and wouldn't help many as much as if I had stock headers to start with.

 

Gabe......any results today?

 

For full details, my build thread is here:
https://my350z.com/forum/na-builds/4...e-welcome.html


City, State which Dyno occured: Austin, TX
Approx weather condidtions: about 75 degrees F, humid
Baseline Dyno: unknown on this dyno
Size of wheels/tires used during dyno: 18-inch wheels - 265/35/18 tires
Dyno after your mods : 260hp, tuned for 25-minute track sessions
Type of Dyno: DynoJet
Year: 2003
Model: 350Z touring
Motor: VQ35DE non revup
Engine Oil: Mobil1 0W40
Plugs: Colder
Transmission: 6MT
Clutch: Jim Wolf
Flywheel: Jim Wolf flywheel
Final Drive Gear Set: Stock
Rear Diff: Stock VLSD
Engine Ground Kit: Stock
Engine Internals: Wiseco pistons, Eagle Rods, Cosworth bearings
Heads: Stock w/ 5-angle intake valve job
Intake Manifold: Crawford V5 plenum
Lower Intake Manifold: Stock
Intake Manifold Spacer: No
Throttle Body: Stock
Intake: JWT pop charger
Headers: Stock
Cats: Kinetix resonated test pipes
Exhaust: Fujitsubo titanium
Fuel System: Stock
ECU: Stock with Uprev reflash & tune
Fuel used on Dyno: 93 octane

 

City, State which Dyno occured : South Florida
Approx weather condidtions : Sunny, HOT, about 90-95 outside.
Baseline Dyno : 220whp
1/4 mile time/trap speed : 14.0 @ 101
Size of wheels/tires used during dyno : 18 inch Stockers
Dyno after your mods : 296whp/256 tq
1/4 mile time/trap speed : Havent done it yet
Size of wheels/tires used during dyno : 18" Enkei RPF1 w/ Toyo RA1
Type of Dyno : Default calibrated Mustang Dyno
Year : 2005
Model : Z
Motor : Rev-Up
Engine Oil : Still on thin conventional, switching to RP synthetic after next track event.
Plugs : 1 Step Colder
Transmission : 6spd
Clutch : JWT, switching to twin disc next
Flywheel : JWT
Short Shifter : Stock
Final Drive Gear Set : Stock
Rear Diff : Stock
Engine Ground Kit : Stock
Engine Internals : 12:1 CP Pistons, Carillo Super A Rods, ARP studs,
Heads : 3 angle valve job, Ferrea Valves
Intake Manifold : Cosworth Plenum
Lower Intake Manifold : Cosworth
Intake Manifold Spacer : No
Throttle Body : Stock .
Intake : Custom K&N
Headers : Crawford
Cats : No way!
Exhaust : Custom Dual 2.5" w/ HKS Hi-Powers
Fuel System : Cosworth Fuel Rails, 440cc RC injectors, Walbro 255lph pump
ECU : Haltech Pnp Standalone
Fuel used on Dyno : E85 FTMFW!!!

See my sig for the build thread. Racing at Sebring next weekend!

 

Nope, not yet... They are quite backed up for now... This is agonizing to say the least, but i'll send you a PM when i get it done. This way we don't flood this thread.

 

City, State which Dyno occured : Wilmington, CA
Approx weather condidtions : I really don’t remember
Baseline Dyno : just prior to most recent upgrades = 275/255
1/4 mile time/trap speed : 14.1xx (1300 ft elevation, approx 3K ft DA, AAA speedway in Fontana, crap track).
Tires used in the 1/4 : OEM 17” wheels – Kumho Ecsta ASX 225/55/17 (I think)
Size of wheels/tires used during dyno : N/A, it was Dynapack
Dyno after your mods : 294.6/261.5
1/4 mile time/trap speed : 14.002 – 103mph (same track and conditions as previous - this is the fastest Ľ mile ET for a VQDE that I’m aware of at this track).
Tires used in the 1/4 : Toyo T1R 245/45/19 (street tires of course)
Size of wheels/tires used during dyno : N/A same dyno as above
Type of Dyno : Dynapack
Year : 04
Model : G35 - sedan
Motor : VQDE non revup
Engine Oil : Amsoil 5W-30 and sometime 0-30
Plugs : NGK iridium
Transmission : AT
Clutch : N/A
Flywheel : N/A
Short Shifter : N/A
Final Drive Gear Set : 3.692 (3.7)
Rear Diff : Quaife ATB
Engine Ground Kit : Sxexcx (So Cal local G35 vendor)
Engine Internals : stock other than JWT S2 cams & valve springs – upgraded to rev-up oil pump and rod bolts (in order to rev higher safely)
Heads : Stock
Intake Manifold : OEM machined upper by DEO
Lower Intake Manifold : blue printed machined – ported/blended by DEO
Intake Manifold Spacer : MD ˝” Iso-thermal
Throttle Body : stock tb with Designed Chaos spacer
Intake : Stillen intake with OEM Z-tube (plan to test OEM vs Stillen airbox)
Headers : Crawford
Cats : Crawford
Exhaust : Stillen cat-back
Fuel System : Stock
ECU : UpRevs Osiris – also have used Technosquare flash which is very good.
Fuel used on Dyno : MS103 and 91

 

Is this on the church dynopack? Just curious, but good stuff non the less.

 

Yes – and pre cams & headers it dyno’d roughly the same on Tony’s (Motordyne) machine, which is calibrated the same.

Dyno comparisons on the internet are worthless – saying one dyno is inflated means nothing… and one car having a higher (or lower) number from a different dyno is not indicative that it is faster or slower than another.

I will say though, that I’m quite confident in this car… it will compete with most and beat many.

 

I wasn't going to say a word......just curious. I am sure it's a fun ride.

 

it coud always be better - but I like it... these days I'm spending much more time with cosmetic chages than performace.

Thanks for the comments

 

If you don't mind me asking what did you make prior to the cam and header install?

 

It would be alot more fun to drive if it was a 6 speed! =p

 

Trust me – its plenty fun beating MTs and seeing the frustration on their face when they get their @ss handed to them by an AT.

I’ve had plenty of MT cars in the past… this car was initially intended for long business commutes – AT made most sense for the initial purchase reason… If I had a dedicated track car it would be MT though.

 

275/255 I think... the info on the list is based on pre-post cams/headers... I've had many other dynos and mods over the years, but cams & headers were the most recent so that’s what I based the list on.

Without going full-build, the cost vs benefit of cams and headers aren’t there.... there are definitely gains but they are minimal and I wouldn’t have done cams without headers and visa versa... I wasn’t aware of anyone that had done it (cams and headers alone) on a G (or even Z for that matter) so I tried it. It's expensive and really not worth the minimal amount of gains. I have ideas for future - but right now I'm doing a bunch of body stuff...

 

Im not a drag racer but you are trapping 103mph and handing modded Zs their asses?

 

I didn’t mention Zs, but I haven’t seen any at this track run faster... it's not uncommon for density altitude to be 3000' at this track... its 1300' elevation and often 70-100 degrees - there are only 1 or 2 track days with weather below 70 (and never below 60) and usually it ends up raining during those months... 14.00 is equal to mid to low 13s at some of the better tracks... if you know anyone that has run AAA speedway (previously Ca Speedway) in Fontana, they will tell you the same... and no, I know of no NA VQDE non revup (or even revup for that matter) that has run faster at this track... many HR don’t run that fast... I have beaten G37s and 07+ sedans (HR)... I've only seen a few Zs run there and they were low to mid 14s...

I’m not saying this car is unbeatable - but it holds its own and beats many...

 

I don't know if the correction is that great to be honest. Most of the times the DA is 1500-2000 here in MD during the months of May-Sept and it hasn't stopped me or many others from only losing .2-.3 at most. I ran a 13.4 (at 268whp) at 78 degrees over 60% humidity at a track nearly 600ft in elevation. Still your car has the power to be a low-mid 13 second car, but a nearly 1 sec correction is a bit much.

 

I’ve had several people that know the car tell me this… honestly I wouldn’t think it’s a mid 13 car because I’m used to running really sh!tty tracks and mid 13s to me are cars way faster than most on this forum… I need to get the car to Famosa in Bakersfield – I hear that’s a much better track and will probably net ETs that most people can relate to… I’m usually on g35driver and a few people over there have suggested the same… here is a recent post that just happens to corroborate what we are talking about:

http://g35driver.com/forums/4303037-post116.html

Anyway – this thread isn’t about racing or even dyno numbers… its about listing mods and gains made. So lets get it back on topic.

 

, thanks for all the great posts guys, keep 'em coming

 

Great numbers for your mods