Guys,

I have searched around a bit, found some informative stuff, but I still would like to run this past most of you with more experience on this....

#1. My brother is an Infiniti mechanic, he said that I "shouldn't need" a tune after I install my Crawfordz cats this weekend.

#2. My combo is simple, something the ECU can work around, Stillen cat-back, drop in K&N, Z-Tube, 5/16" spacer, and that's it. Not really aggressive mods in my opinion. I read a thread about a lean condition after installing HFC's, but maybe that was an isolated incident (looks that way to me)

#3. I know I SHOULD get a tune to get the most out of my mods, and have contacted MRC Motorsports regarding this, but I would like to get it done in the Spring as opposed to right now. Will I be "safe" driving the hell out the car from now until then, or should I get the tune to avoid any kind of damage?


Thanks.

Don

 

I dont think that you necessarily need a tune with the mods you have.l The ECU learns and adapts to the minor mods that you install. I have Injen CAI, DC Headers and Injen Exhaust and my car out performs stock G35s.

However tuning will maximize those mods for sure.

 

+1, except for the ECU learns part lol.

 

What do you mean "except for the ECU learns" part?

 

ECU only has a set range of AF ratio and other specs, a tune allows the range to be at the level it should be. ECU doesn't tune into those ranges by itself. (though it was said that UNICHIP has an adaptive chip for us? )

 

Ok, so where do I stand with the mods/air fuel ratios? "Safe" range or "other"?

 

to maxamize gains, you should always need a tune...with whatever mods you have. but it would only be cost efficient to get a tune when youre done modding. for instance, dont get a tune after an intake more, and another after a spacer mod, etc.

 

Jordan, I agree.

I was just wondering. I have the common sense to know I won't be wasting about $1000 on a UTEC and then about $250 every time after I tune.

I'll just ask my brother regarding the adaptability of the stock ECU and how much leeway it has regarding air/fuel ratios.

 

that pretty much sums it up. Our ECU isn't powerful enough to figure out the best air/fuel ratio's if we are changing parts, which changes how much air, and depending on you mods, how much fuel you are enjecting is the best for driving.

 

You definitely don't need a utec with your current mods. That would be definite overkill. I would wait until you go FI or you start to build up the motor if you are going the NA route, unless you have buddies that can hook you up with the constant re-tuning (which some of us here have).

 

I was going to bring my car to MRC Motorsports, and they were gonna tune with a UTEC....

That's why I brought up the UTEC. I figured it would be overkill as well, but it's better to be safe than sorry.

Don

 

+1 agreed

 

#3. I know I SHOULD get a tune to get the most out of my mods, and have contacted MRC Motorsports regarding this, but I would like to get it done in the Spring as opposed to right now. Will I be "safe" driving the hell out the car from now until then, or should I get the tune to avoid any kind of damage?

GUYS, none of you are telling me anything I don't already know or have not already stated in my post!

The question is WILL THE A/F RATIO be safe after the mods? Hence, DO I NEED a tune?

 

I am interested as well.

When I last got my car dyno'd, the A/F band told me my car was running lean, but it was on the border of lean and too lean. The guy at the Speed shop told me I'll be okay, but I have considered the technosquare reflash. I am done with my modding endevours, so I won't be adding anything after the reflash.

 

Yes you will be safe, and no you don't need a tune whatsoever. That should have been apparent in the responses you got. These are just basic mods, it's not like you are adding nitrous, a turbo, SP, or Different engine internals.