Computer Modification/Tuning ??

[hellbound F150]

Originally Posted by Big Platinum

I HIGHLY doubt you'll get 20hp and 40tg in the Titan. I don't believe it the the F-150 either. Go on websites and look at the average gains for all the cars and trucks, they aren't that high. Real world dyno's show even less gains. But, I have no doubt you will get some power, but is it really worth it? The expense of the chip plus the continued expense of 91 is too much to justify a few horsepower gain. Now if it does show there is power to be gained than great, I'll buy one, but that waits to be seen.

How do you know about the F-150? There isnt even a tuner available for the new 04 yet. There is a custom tuning which requires the PCM to be sent into the tuning dealer but it is not really advertised. He does it out of his own shop and once you do, you cant tune it back. Once the tuner comes out you can. He has dyno proven 25hp and 47lbs ft at the wheels on a 4x4 model. He has quoted me with a custom tuning on my truck w/ 93 octane at around 30 HP at the wheels. Plus, rev limiter is gone, shift points changed and so on.

[pciley]

No, the QX56 does not have variable valve timing, or a different top end than the Titan. The difference must be in the ECU since nothing is mechanically different.
MAYBE it was jut marketing.. .possibly there is no power difference between the two?
They had to make some incentive for buyers to go with an Infinity QX56 over a Nissan (Pathfinder) Armada. If you compare an LE Armada 4x4, than the QX56 4x4 is $10k more...
$41,250 vs. $51,000 (retail vs retail). That extra 10-15 horsepower/tq isn't enough incentive for me
obviously, there are many more pimped out interior features in the Infiniti, but we can ignore those for an engine vs engine discussion right?

[JS02]

It just seems that the performance of the QX56 is better than you would expect considering the extra weight. I wonder if it is not more than the 10-15 hp it claims. Maybe some of the testers were just extra fast.

[Steve04SE]

Originally Posted by Big Platinum

I HIGHLY doubt you'll get 20hp and 40tg in the Titan. I don't believe it the the F-150 either. Go on websites and look at the average gains for all the cars and trucks, they aren't that high. Real world dyno's show even less gains. But, I have no doubt you will get some power, but is it really worth it? The expense of the chip plus the continued expense of 91 is too much to justify a few horsepower gain. Now if it does show there is power to be gained than great, I'll buy one, but that waits to be seen.

FWIW, I asked MTI about the potential rwhp gains IF the PCM were retuned for 93 octane and Jayson guessed 15 rwhp.

[juma]

I heard back from hypertec...no plans to do an HPP3 for the Titan.

juma

[Big Platinum]

How do you know about the F-150? There isnt even a tuner available for the new 04 yet. There is a custom tuning which requires the PCM to be sent into the tuning dealer but it is not really advertised. He does it out of his own shop and once you do, you cant tune it back. Once the tuner comes out you can. He has dyno proven 25hp and 47lbs ft at the wheels on a 4x4 model. He has quoted me with a custom tuning on my truck w/ 93 octane at around 30 HP at the wheels. Plus, rev limiter is gone, shift points changed and so on.

All these companies make big claims. But I am yet to see a real world dyno by an unbiased source of before and after computer tuning on almost any newer truck (except diesel) showing any significant gain in rear wheel HP and TQ. I'm not picking on your F-150 so don't get so defensive, I'm talking about all trucks and most cars for that matter. The power just isn't there in over the counter engine tuning on stock, or almost stock cars and trucks. Show me proof otherwise and I'll believe it.

[SupraTitan]

Think outside the box! We have a japaneese truck, the Japaneese aftermarket is the BEST period, espcially when it comes to electronic gadgetry. There are generic items that will work on the Titan. The domestic aftermarket is horrible, hypertech, superchips and jet etc., total waste of money and thank God they don't make anything for the Titan and I hope they never do. If your serious start digging, look for computer upgrades for the 350Z, i'll being willing to bet the titans computer shares the same interface that the 350Z does. Using domestic aftermarket computers is like buying a Ducati, then transplanting the engine into a honda chassis, a major step back.

[GARRICK ANSON]

New computer programing can help on all cars to different extents. Nissan though have one major problem. There computers like to self destruct if you try to reprogram them, or even piggy back them.
the only company i know of that has been successfully doing this for years on nissans is Jim Wolf Technology.
They have been tuning Zcars, Skylines, Silvias, anything with a nissan/infiniti emblem on it.
They do custom computer apps, all you have to do is call and tell them what you want. They are not cheap, but they are the best source for nissan owners who want real power.
http://www.jimwolftechnology.com/customer_part.asp

[61 Bel Air]

Originally Posted by Big Platinum

Cars and Trucks (Titan included) are coming pretty well tuned from the factory. As a result, there is increasingly less and less power to be gained by aftermarket tuners. However, there are some other nice features which they offer such as the ability to adjust:

-Top Speed Limiter (in case you really get moving in 1/4 mile)
-Speedo for different tires and gears
-Tranny shift points and firmness (although tow mode does this to an extent)
-Electric Fans (if you have a low temp thermostat)
-Diagnose trouble codes
-And possibly even adjust the "fly-by-wire" system for better throttle response and WOT.

Just a thought

Actually the Titan is very responsive to modifications and doesn't need a chip or programmer to benefit from an intake or an exhaust. The Bosch mass air sensor you seen on the Titan is also used on the new F150. 30+ hp gains on the f150 are real, but at the same time you have to make sure the fuel trim numbers aren't too high. It seems the new Bosch mass air sensor is very sensitive and combined with the higher output of these vehicles and the restrictive air cleaners makes for some very good HP gains.

[rholland]

"All these companies make big claims. But I am yet to see a real world dyno by an unbiased source of before and after computer tuning on almost any newer truck (except diesel) showing any significant gain in rear wheel HP and TQ. I'm not picking on your F-150 so don't get so defensive, I'm talking about all trucks and most cars for that matter. The power just isn't there in over the counter engine tuning on stock, or almost stock cars and trucks. Show me proof otherwise and I'll believe it."

I agree with this, I am a dragracer, motorcycles, I go to the dragstrip almost every weekend, and all the computer chips, exhaust systems, and air intake systems that I have bought for my pick ups have never made much of a difference. I will run my Titan one of these days to see what it does, and agin buy all of the goodies, hopeing that they work.
My Web Site is : http://www.geocities.com/bholland3175/index.html

[61 Bel Air]

If you look at the claims of most manufactuers they always claim "up to" XX amount of HP. Thats because every vehicle is different. Not every vehicle will respond the same way. But they will be reasonably close. A responsible manufactuer will make claims they know they can meet and anything extra is just a bonus. There are a lot of people who say the manufactuers are full of it and their claims are outrageous, but this is not true of all manfacturers. Like I said, some vehicles respond better than others.

[GARRICK ANSON]

Thats one of the reasons I like JWolf Tech ECUs, they predict aroud 10-15HP on Non-turbo Nissans, but major gains when it comes to throttle responce and powerband changes. Governors and shift points are usualy adjusted very nicely on their kits.
The point of a good "chip" or new ECU is not for major HP gains, but to optimize your engine for use with your other modifications (intake, exhaust, throttle body, fuel injectors, ect...).
So unless you have a turbo to tune up the boost with, dont expect miracles with your chips.

[SupraTitan]

Originally Posted by rholland

"All these companies make big claims. But I am yet to see a real world dyno by an unbiased source of before and after computer tuning on almost any newer truck (except diesel) showing any significant gain in rear wheel HP and TQ. I'm not picking on your F-150 so don't get so defensive, I'm talking about all trucks and most cars for that matter. The power just isn't there in over the counter engine tuning on stock, or almost stock cars and trucks. Show me proof otherwise and I'll believe it."

Also I would not feel comfortable modifying the fuel system to any degree without dyno'ing with a wide band o2 sensor to verify that there are no lean spots that could spell trouble later on. Where these aftermarket "chips" generally find there power is in leaning out the mixture in the top end. Typical stock calibrations run pretty rich on the top end, but do so for a reason. Of course there is always room for improvement but the leaner you are on top the closer you are to detonation. I'd really want to see where they draw the line, its easy to find power by leaning it out, the hard part is finding power and keeping the engine at a safe fuel/air mixture. It would be nice to see one of the Nissan tuners (wolfe or stillen) step up to the plate with the titan, they typically find power and retain a safe operation condition.

On another note does anyone know the size of the stock fuel injectors, i'm just curious to know at what power level they become a liability, i'm sure there fine until forced induction is thrown into the mix. They look much smaller than the 440's I have in my supra, but they do look bigger than the hemi's injectors. I'm guessing there around 370cc which would probably be ok for 350 rwhp.

[Fatfreeone]

has anyone installed the apexi system yet? to see if it works or not.

[pciley]

If Jim Wolf can get 10-15 hp out of a 4-banger or 350Z, think of what they can do with 5.6 Liters. If that 10-15 was from a Z or G35, then I would guess another %25 - %40 increase on that number for us.