AFR idel problem

EVOHUNTER · 06-20-2014, 02:53 PM

whats your AFR at cruise speeds and at WOT? Are they dead on?

zuperman 370 · 06-22-2014, 03:48 AM

thank you to everyone who chimed in with various things to look out for, after opening this thread i decided to pull the trigger and ship the car to a tuner to take a look at it, and the finding he found were shocking, first of all the AFR were crazy and car cutting off at idel was due to the fuel trims in the previous tune to be messed up also noted slight knocking at normal driving which has been addressed and the drivability issues as well ( slow response, lazy hesitant shifting, jumpy rpm) everything that can go wrong with the car basically, also changed my pully to 92mm from 96mm on a stage 2 sc so should be more fun, and got a uprev back fire map, iv invested so much on this build and used only the best of the best parts and i was pissed that the outcome was crap basically iv hated to drive the car for the past year and a half leading to abandoning it and being parked for months not being driven, i hope this new tune rekindles my love for my z and get to enjoy is as much as before if not more iv had a sc on my car for the past year and havent even enjoyed or felt it and what kills me is that i read many posts of guys here with similar setup if not less than mine and they are raving about how the cars preform and i havent even felt any joy or even power, wish me luck guys that tune goes well and ill keep you all posted for sure.

VSS370z · 06-22-2014, 08:24 AM

Good luck and hope everything goes well!

zuperman 370 · 06-22-2014, 03:31 PM

Numbes are in guys 457 hp 334 tq on 8 psi on mustang dyno extreme hot humid weather and bad fuel overall pleased how much will this convert to on dyno jet?

Jordo! · 06-22-2014, 10:27 PM

Quote:

Originally Posted by zuperman 370

Numbes are in guys 457 hp 334 tq on 8 psi on mustang dyno extreme hot humid weather and bad fuel overall pleased how much will this convert to on dyno jet?

Nice -- congrats and glad you got the problems sorted out

Any idea what a stock Z puts down on their dyno? It's hard to compare and contrast between mustang and dynojet...

If I know what a stock Z put down on their dyno, I can give you a good ball park estimate.

zuperman 370 · 06-23-2014, 04:07 AM

Quote:

Originally Posted by Jordo!

Nice -- congrats and glad you got the problems sorted out

Any idea what a stock Z puts down on their dyno? It's hard to compare and contrast between mustang and dynojet...

If I know what a stock Z put down on their dyno, I can give you a good ball park estimate.

ill have to ask my tuner that and get back to you on it, the thing is i did not do a before dyno with my old tune as my tuner was afraid to push the car at first cuz he detected knock and fuel trim problems when he initially checked the car

Jordo! · 06-24-2014, 02:19 AM

Quote:

Originally Posted by zuperman 370

ill have to ask my tuner that and get back to you on it, the thing is i did not do a before dyno with my old tune as my tuner was afraid to push the car at first cuz he detected knock and fuel trim problems when he initially checked the car

Understood.

I can still give a pretty reasonable estimate if I know what a typical stock Z puts down on their dyno -- I have data on around a dozen VQ37HR's on dynojets in both 4th and 5th gear, so I can calculate the approximate % difference between A and B and give you a close estimate.

06-20-2014, 02:53 PM	#16 (permalink)
EVOHUNTER Track Member Join Date: Jul 2011 Location: Edmonton, Canada Posts: 681 Drives: BOOSTED3-7-0 Rep Power: 15	whats your AFR at cruise speeds and at WOT? Are they dead on? __________________

06-22-2014, 03:48 AM	#17 (permalink)
zuperman 370 Track Member Join Date: Dec 2009 Location: BAHRAIN Posts: 944 Drives: 370z 2010 at blue Rep Power: 16	thank you to everyone who chimed in with various things to look out for, after opening this thread i decided to pull the trigger and ship the car to a tuner to take a look at it, and the finding he found were shocking, first of all the AFR were crazy and car cutting off at idel was due to the fuel trims in the previous tune to be messed up also noted slight knocking at normal driving which has been addressed and the drivability issues as well ( slow response, lazy hesitant shifting, jumpy rpm) everything that can go wrong with the car basically, also changed my pully to 92mm from 96mm on a stage 2 sc so should be more fun, and got a uprev back fire map, iv invested so much on this build and used only the best of the best parts and i was pissed that the outcome was crap basically iv hated to drive the car for the past year and a half leading to abandoning it and being parked for months not being driven, i hope this new tune rekindles my love for my z and get to enjoy is as much as before if not more iv had a sc on my car for the past year and havent even enjoyed or felt it and what kills me is that i read many posts of guys here with similar setup if not less than mine and they are raving about how the cars preform and i havent even felt any joy or even power, wish me luck guys that tune goes well and ill keep you all posted for sure. zefaulter likes this.

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06-22-2014, 08:24 AM	#18 (permalink)
VSS370z Enthusiast Member Join Date: Apr 2012 Location: Puerto Rico Posts: 380 Drives: 09 Nissan 370z CY M6 Rep Power: 13	Good luck and hope everything goes well!