ECU TUNING FOR THE VERSA

[C-Kwik]

Look at the rest of the forum dude. The versa that was tuned was a cvt transmission, which means it can't be rated in HP because at WOT it only sits at 1000 rpm.

If there is torque, there is a force. If the force is accelerating a mass, there is power. BASIC PHYSICS. If you disagree with this, go have a talk with Newton.

Tuning for our manual and automatic transmissions can produce anywhere from 40 to 60 HP depending on the tune used and the skill of the tuner

There is only so much energy in a given amount of fuel (and the corresponding amount of air that is needed to extract that energy). There is only so much air a motor of fixed parameters can take in. There is also only so much energy that the same engine can convert into usable energy. There are physical constraints that exist. The tuning only serves to maximize the results from those given constraints. Major increases in HP are made primarily by changing the constraints (by changing the parameters). Unless of course you are saying we can change the laws of physics. Again, your argument there is with Newton.

As for CVT's, what CVT's can not do in variable gear mode is they can not provide a horsepower curve over the entire range of RPM. Assuming Nissan Engineers have the engine spinning at the peak HP RPM during max acceleration, then the HP made at that RPM level is going to be exactly what a dyno will calculate (less the losses in the drivetrain). If your tuner is telling you no HP calculation is provided, then they are full of crap. If you had no HP, your car would not be able to move...PERIOD.

[C-Kwik]

Didn't you guys know? The Versa's engine was originally designed for F1, but they decided to scale it back a bit to get better gas mileage.

They also co-developed a NASCAR version, but to get those power levels you need to convert to a carburetor.

LOL!

[audtatious]

With all that said, a tune on a stock engine is relatively not worth the money. 5hp should /=300 bux in a custom tune. Now, get headers, cats, cat back, intake, better manifold, lightened flywheel, cams, etc etc then a tune would be worth it.

[AZhitman]

Actually, the ECU can adapt to mild mods such as an intake / exhaust / high-flow cats / lightened flywheel.

Keeping in mind that some of those mods simply free up horsepower (not add it), even ALL of those together (assuming they were designed to work together - they're NOT), you'd still only gain maybe 10-15 hp on a 120hp car.

OP: This is a place to learn (and share knowledge). NOT a place to trade tall tales. It takes a lot to impress most of us, we've built / raced / studied / modified / blown up a LOT of cars.

[OutToWinPAHC]

Lies Greg you can totally get 40hp from a tune.... in the world of LS that is

[PapaSmurf2k3]

Right, its a percentage game.

[AZhitman]

Lies Greg you can totally get 40hp from a tune.... in the world of LS that is

[audtatious]

Keeping in mind that some of those mods simply free up horsepower (not add it), even ALL of those together (assuming they were designed to work together - they're NOT), you'd still only gain maybe 10-15 hp on a 120hp car.

No arguments. Should look into lowering unsprung weight instead of spending 300 bux on a ECU tune or trying to get that final couple hp squeeze out of the motor.

[Blue_street_racer]

Go to the link at uprev.com that was posted earlier in this forum. Read there where it says that it sits at 1000 rpm at WOT

[AZhitman]

Go to the link at uprev.com that was posted earlier in this forum. Read there where it says that it sits at 1000 rpm at WOT

You can't read very well, and you certainly don't know much about cars.

We were also worried about how to tune a car that under wide open throttle conditions really just sits at one RPM.

Show me where that says 1,000 rpm and I'll shut up.

I own a CVT car. Do I need to take a video of my car with the accelerator mashed to the floor so you can read the tachometer? Do you really think there's a vehicle on the market that only revs to 1000 rpm?

[Andrews Chalmers]

You can't read very well, and you certainly don't know much about cars.

Did you see the garbage from that site? Apparently Versas with CVT in the United States have been secretly shipped with the HR16 instead of the MR18!



What a great business model - give me $ and I'll tell you that your car now produces the same hp it was supposed, but you'll be dumb enough to believe it because I tell you the baseline hp is 20hp lower.

[AZhitman]

^ THIS man gets it.

p.s. I challenge ANYONE to add 20hp reliably to a MR18 for less than $1,000 without forced induction or nitrous. ANYONE.

[PapaSmurf2k3]

Do you really think there's a vehicle on the market that only revs to 1000 rpm?

Not really on the market, but this is probably about there:

[AZhitman]

I'm sure Blue_street_racer would probably list that as one of his "epic street kills".

[PapaSmurf2k3]

^ THIS man gets it.

p.s. I challenge ANYONE to add 20hp reliably to a MR18 for less than $1,000 without forced induction or nitrous. ANYONE.

http://www.homedepot.com/webapp/wcs/sto ... reNum=2912
Graft that on. I win.

[AZhitman]

LOL - nice.

Have fun finding someone to do the fabrication for the $50 left over after you pay tax on it.

[PapaSmurf2k3]

bahahah!
Not to mention a way to make that 20hp useful (you're not going to get out of the car, pull the cord to start that thing up, and RUN back into the car while its moving with that 20hp).

20 hp for less than a grand MIGHT be possible, but you'd have to do a lot of work yourself, and hence the whole "reliability' aspect comes into play.
You could pull the head and shave it down, run premium, advance your timing, and you're only into it for the price of a gasket at that point.
Not sure how the cams work on the MR18, but you could also pull a DIY adjustable cam gear type deal, maybe shift your power curve to be more of a number chasing dyno queen. Sawsall the exhaust off after the 2nd O2 sensor (so you don't throw a code), or do it before the cat and get something to trick the ECU to think that the cat O2 is still working.

I'd be interested to see someone take on the challenge. Hell, I'd do it if I had a versa.

[nissangirl74]

Quoted from uprev's site:

Martin ended up with almost 5hp gain at the wheel and thats not bad considering these cars are rated at 107hp from the factory.

[themadscientist]

I'm taking the wife's Tiida to the races, daym! Epic misinformation here; I wish I could bottle it and sell it as novelty fail.

[blindsnyper]

WHAT GOES ON IN THE MOD FORUM???

[audtatious]

Quoted from uprev's site:

Martin ended up with almost 5hp gain at the wheel and thats not bad considering these cars are rated at 107hp from the factory.

http://www.nicoclub.com/archives/the-dy ... ement.html

Even those measurements are suspect (No, I'm not saying uprev is intentionally doing anything)

[audtatious]

WHAT GOES ON IN THE MOD FORUM???

Beer and pretzels.

Hard to do anything in the Mod forum with all the strippers

[PapaSmurf2k3]

Someone has to put these girls through college!

[Andrews Chalmers]

This entire ECU tuning stuff would be more believable if we're talking about a VW engine that runs 30-40hp more in the EU but got toned down for emissions in the US.

But with non-turbocharged MR-18? ummmm nope.

[AZhitman]

WHAT GOES ON IN THE MOD FORUM???

We make fun of people who post stupid things.

[AZhitman]

Quoted from uprev's site:

Martin ended up with almost 5hp gain at the wheel and thats not bad considering these cars are rated at 107hp from the factory.

PWNT.

(...by a gurl...)

[BigBodyV]

EPIC!!!

[RED_DET]

just went and picked up a versa, tuning will commence shortly....

[AZhitman]

167 hp or ban.

[OutToWinPAHC]

WHAT GOES ON IN THE MOD FORUM???

I post nude video of me playing Kinect naked