Well I have installed a Crawford plenum earlier this week, The install went smoothly, except I doubled the gaskets.

Problem is: I went to the track to chart the changes and to my dismay the car was a good 2/10's slower. I expected 2/10's faster. The only setup change was the plenum and a 04 TCM update. The TCM update made things noticeably better. Has anyone expereinced poorer performance by adding the plenum or am I missing something, My conclusion is that I run an Injen CAI and a lot of people are running a popcharger/Ztube with the plenum. I would assume that the MAF sensor reads more air from the short pipe thus telling the ecu more fuel taking better advantage of the plenum since it is down stream from the MAF. My CAI may not be getting the needed air into the throttle body/plenum. Did you guys do a throttle position sensor reset when you installed the plenum. I'm so disappointed I want to send it back instead of my core right now. Please help.

I'm also thinking of adding a side scoop to my aero kit, kind of like this.

03 Sedan ~ 5AT ~ aero ~ 19x8" Axis wheels ~ Garnet ~ premium ~ NISMO body kit ~ clear front corners ~ Stillen Cat-back ~ Injen CAI ~ Crawford plenum

265447-Bumper Scoop.JPG

 

gspot35,

What were the differences in ambient conditions?

What was the difference in in the track's surface temperature?


DaveO

2003 G35 AT Sedan / DP / Willow / Premium / Sport
350Z Air Duct, Eng Cvr & T-Stat / Stillen CAI / Crawford Plenum
GG 10-Wire Kit / TS ECM / E-Fans
Street Edge TC / B&M Cooler / Stillen Exhaust

 

Being that you have an auto did you do a computer reset? That should help.

"Not all G35 owners are G35 Drivers"
2004 G35 Coupe 6MT-BS/BLK | Full Aero-Navi | Gounding Wires | Clear Corners | 35% Tint | 350Z Tube | JWT PopCharger | Passport 8500 |

 

wait, is this solid 20 hp dyno proven?

anyways, id say the obvious thing to do is get a ECU reflash. or, you can sell me your crawford plenum and ill go get a reflash =)

G35s6mt/TSecu/350Z Springs&Struts/K&Nfilter+Z-tube/StillenDualExhaust /6WireGroundKit/KinetixHighFlow

 

Thanks to smcallis for the advice. I talked with Doug today and pretty much got the same response. I think I'll try to add my stock airbox with my injen tube back into the car and try it out again. I'm waiting on my buddy who has a speed lab to contact Technosquare about being a dealer. After that I'll tune the car myself with his help.

03 Sedan ~ 5AT ~ aero ~ 19x8" Axis wheels ~ Garnet ~ premium ~ NISMO body kit ~ clear front corners ~ Stillen Cat-back ~ Injen CAI ~ Crawford plenum

 

gspotg35....
The Tecnosquare ECU upgrade really Improved on my existing Mods. Check out linky:
https://g35driver.com/forums/showfla...sed&sb=5&part=



265715-P5070201.JPG

 

I've got the Crawford Plenum & Injen CAI like you...



265720-P4260150.JPG

 

RugRat, Your ride is nice. So all in all I gather the CAI and the plenum are a good combo, just need to be dialed in. I'm wondering if I just change my injectors if that would full the ecu into thinking it's injecting x amount when it's really injecting y amount. Anyone know what the stock ccm's are?

03 Sedan ~ 5AT ~ aero ~ 19x8" Axis wheels ~ Garnet ~ premium ~ NISMO body kit ~ clear front corners ~ Stillen Cat-back ~ Injen CAI ~ Crawford plenum

 

gspot35 Thanks man...yea I've wondered that myself if you could fool the ECU with larger injectors.
You got a sweet looking G35S, I like the Color & your front Aero bumper...

 

Question, How do you "tune" the TS ECU reflash? You can't change the ECU settings can you?

301-bhp!!! ...and growing!

 

No, once you get the Technosquare ECU upgrade, you can send it back to T.S. for a small fee (not sure I've heard $50-75.00) for a reflash to include parameters for your newest mods...