Quote:
Originally Posted by ZMan8
A couple threads regarding how much people get with a tune:
Uprev Tuned at Z1, results inside :)
My dyno results
Went to Uprev. Here's my results
There are many more like that if you search in the tuning section. My point is people don't get much hp out of a tune on this car. What a tune helps with is better usable power, corrects the afr, and gives it better feedback when you mash in the pedal. IF you go to an uprev tuner, they will most likely say you will gain between 6-15 hp. That number will depend on multiple factors of course. |
That was some interesting reading, thanks for the links. To me it looks like most of those cars make over 300RWHP after a tune and a couple of bolt ons. Not too shabby for how light this thing is.
I've been browsing the tuning section of the forum but I'm not really finding any good nuggets of information that would help me know what's capable in these cars from a tune perspective. I may post a thread and see if anyone can chime in, but in my experience most end users have no idea how tuning works and think it's some kind of black magic. In reality it's no different than the old carb and timing light days, but since it's computer controlled people are spooked by it.
What I'd like to see is someone with a stock Z do a data log and see what the AFR is as well as the timing at WOT. It "could" be that Nissan already squeezed most of the available power out of this motor from the factory. OEMs don't normally do that, but it is possible. The fact that it's tuned for 91 tells me there is some on the table. We don't even have 91 in my area...it's all 93 and that'd be worth a bit right there. Normally you tweak the timing adding a bit at a time until the knock sensors show some retard, then you back it off just a tick. Then you start setting up the AFR and find the sweet spot of AFR and timing to avoid any knock retard on the fuel available.
I tuned my supercharged 4Runner myself and it's not really a huge deal. I did it with a Split Second piggy back since there is no tuning available for the 4Runner directly. I tuned it on a dyno, then touched it up on the street. Gained about 120RWHP in that little truck
Being able to switch tunes on the fly with the cruise control is VERY slick. I wish my Challenger could do that. I have to carry a tuner with me and I have two tunes. A 93 octane street tune and a 109 octane race tune. The only differences between the two are the race tune has a bit leaner AFR, 4 more degrees of timing, and the adaptives for IAT are dialed back to not pull as much timing as the IAT increases. It was good for about 3/10 and 2MPH at the 1/4 mile track.
Quote:
Originally Posted by PaulZ370
No where in my post did I say an internal combustion engine is the same as a vacuum cleaner. The point was the principle of doing a lot of work just to suck the air into the plenum vs not working as hard to do the same. The HP difference is what you use to do the suctioning, or divert to the wheels.
I hope that clarifies it a little?
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I hear what you're trying to say. I look at it differently, but probably comes to the same thought....my point of view isn't that it takes more horses to pull in the air, but allowing an engine to breath more easily makes it more efficient. Probably saying the same thing you are in the end. I'm just not sure a CAI will help this car that much, but I just got mine and have some research to do on the current system to form an educated opinion. On my Challenger, which had a similar stock CAI that pulled air from behind the head light, I only gained about 5RWHP. However once I added the supercharger it really needed it as that blower could use all the air I could give it.