Anyone can tell me why?

niznizbobo · 08-31-2011, 09:14 AM

Hello, I am sorry if my question is stupid!

I went to dyno my Z today and the guy told me that my car is a bit lean or AFR lean? If my spell is right? What is that mean? Can any one explain to me plz? He said that it might does a little damage to my engine!!! He told me that the AFR should around 14 and my one is a bit low or something? and he ask me to buy a ECU flash to tune the engine!! I am really confusing? Don't know what is it mean?

I have FI CBE system, Stillen G3, Berk HFC on my car.

Red__Zed · 08-31-2011, 09:23 AM

Afr= air /fuel ratio

Running lean means there is too much air, relative to the amount of gas coming in.

It is not uncommon to need a tune after installing your mods, and you may pick up some power.

Post up the dyno with afr if you have it.

V8Killer · 08-31-2011, 10:35 AM

Ya once you do those mods exhaust and intake you need to look into doing a tune. You want everything to run smoothly in your vehicle not to mention you will pick up some extra ponies.

SPOHN · 08-31-2011, 12:43 PM

Get a Uprev and have it personally tuned for best results. You'll be really happy with your ride after.

08-31-2011, 09:14 AM	#1 (permalink)
niznizbobo Base Member Join Date: Sep 2009 Location: australia Posts: 41 Drives: 09 nissan 370z Rep Power: 16	Anyone can tell me why? Hello, I am sorry if my question is stupid! I went to dyno my Z today and the guy told me that my car is a bit lean or AFR lean? If my spell is right? What is that mean? Can any one explain to me plz? He said that it might does a little damage to my engine!!! He told me that the AFR should around 14 and my one is a bit low or something? and he ask me to buy a ECU flash to tune the engine!! I am really confusing? Don't know what is it mean? I have FI CBE system, Stillen G3, Berk HFC on my car.

08-31-2011, 10:35 AM	#3 (permalink)
V8Killer A True Z Fanatic Join Date: Feb 2011 Location: Newport, NC Posts: 1,127 Drives: It Hard Till It Pops Rep Power: 16	Ya once you do those mods exhaust and intake you need to look into doing a tune. You want everything to run smoothly in your vehicle not to mention you will pick up some extra ponies. __________________ "Punch" Too much to list and a baby shot of nitrous....

08-31-2011, 12:43 PM	#4 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 46 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	Get a Uprev and have it personally tuned for best results. You'll be really happy with your ride after. __________________

08-31-2011, 09:23 AM	#2 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 120	Afr= air /fuel ratio Running lean means there is too much air, relative to the amount of gas coming in. It is not uncommon to need a tune after installing your mods, and you may pick up some power. Post up the dyno with afr if you have it.