Well I have been searching for the last 2 hours, and a little bit yesterday. I have not found much other that what AF ratios are lean and rich. I want to know though, If you are running lean, what are some consequences, and what can happen?

I am going to the Drag strips in 1 month, and am scared to mess up my car, but might not be able to save enough for a reflash by then, and I don't want anything bad to happen at the drag.

MODS:

Injen True Dual Angled Exhaust
JWT Popcharger
Helix TestPipes
Motordyne Plenum Space 5/16"

Sorry for a dumb question but I searched for a long time.. so thanks in advance.

 

detonation, or at least that is what Alberto would say.

 

Yea that was one of the only things I found when I searched. So basically I can get spark knock, which usually only results in engine damage if its for prolonged amounts of time?

 

Bad Gamble. Rich better than lean.

Eventually someone who deals with that stuff will chime in.....

 

Maybe I should just dish out the money before the drag day...

 

If you know you are running lean you will make more power with a tune.

Its not OK to run lean, but fortunatly the knock sensors will pull back the spark timing if it senses knock. The drawback to retarded timing is further reduced power.

So either way, you will make more power with a tune.

 

That makes sense to me. So I should be able to take it to the drags with no problems..

 

Probably, but how lean are you?

 

I have no idea, you would have to judge by the MODS in my signature. I have not been to a dyno to check my AFR because its 100 for 3 pulls, and I could just put that towards the TS reflash I want.

I am so debated in what I want to do right now its ridiculous, I really wanted to wait for headers before a TS reflash so I dont have to pay them another 500 to reflash it after I get some headers on, but I also want my car to run safely at the track.

With similar mods I have seen people running 14-15:1.

 

you do realize probably almost a 1/3 of the people on these boards have a lot of the basic bolt on breather mods such as the ones you have on your car and have zero problems running a bit "lean". i think you are confusing F/I and N/A when it comes to damaging your car running a bit lean. you are gonna be fine N/A running with those mods you have with no tune. get over it already! .

 

Thanks.

 

The test pipes are what will make you run lean. I have similar mods (i, iman, h, hfc, stillen TD) and before the TS reflash I was running 13.0 for most of powerband. After re-flash, the dyno put the AF around 11.5 +/- 0.3 over the same range. I did it cuz it's hot here (ie easier to detonate when lean), and for the peace of mind. I want to have my Z for a while so a little protection goes a ways I think. I'll glady sacrifice a few hp for longevity. Lightweight wheels and an oil cooler are next.

 

Running too lean can lead to detonation....



JET

 

Ive already decided to reflash before i hit the track.

 

if i were you, i would want to take it to the track without then with the flash just to see what good the flash did for you. but thats just me.

 

^Yeah. I wouldn't worry about being lean with NA mods.

 

Lean condition causes the engine to run hotter as well, leading to more issues. But on the plus side it will clean carbon deposits out of the cylinders

 

That is a good idea, I won't worry about the track then. I actually am getting a dyno done today so I can send it to Technosquare with my ECU. Then I will post my after results as well.

 

Long before the piston explodes every knock drives the bearings into early failure.

Unfortunately knock sensors cannot be relied upon above the torque peak rpm to discriminate between engine noise and knock, they are primarily for below 4,000 rpm operation.

 

You are NA so its consequence is not as greater than FI'ed cars. We have to know first how lean you are so go to a dyno and have it check or get a Widband. You can always put Race Gas at the track to give you that extra safety....