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Can a tune HURT your engine?

 
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Old 12-25-2010, 08:44 PM
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Can a tune HURT your engine?

I was lectured at the table today during xmas, that tuning a car with new 3in exhaust and v2 intake will actually hurt the engine. For the reason you are surging more fuel and air into it (now that it can breath easier) then factory set. Almost like a mini boost. I tried to argue that the h engine isn't like that (standard american is what I was aiming for), and there's some room in it for improved performance without having to rebuild the internals. It IS a high performance 4 cylinder engine. I read somewhere that you can even put a boost with 5-7 psi on it and you wont be in danger of blowing anything stock on it.

But the fact that you are pushing it further then factory is a good point. So I want to be sure, or have the right intel to be able to tell them it isnt a real threat. Will a good tune be significant enough however, to actually put strain on the engine.
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Old 12-25-2010, 09:31 PM
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Re: Can a tune HURT your engine?

In my experience no. I've seen guys run 16-18 psi on stock B16 blocks with a good tune. Most of these cars are still running.

Its known a good tune will make your car run more efficient. So why would it add strain to the engine? It makes more since that a engine would have less strain (with the same load might I add) on a tuned engine than a un-tuned engine.
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Old 12-25-2010, 10:54 PM
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Re: Can a tune HURT your engine?

sure a tune can hurt your engine. To much ignition timing or low 02's(fueling) can cause damage. If its someone that knows what they are doing then you will be fine
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Old 12-25-2010, 10:57 PM
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Re: Can a tune HURT your engine?

go to a reputable shop- ask for a tune. they will do it , improve some hp on your car, and give you a thumbs up... you cant screw up a tune, unless its a newbie, or someone reading the charts wrong...
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Old 12-25-2010, 11:01 PM
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Re: Can a tune HURT your engine?

for what you are doing, not a tune will not mess up your car. and you are correct. h22 is good on a t3/t4 turbo up to 8~psi all stock. its all how you tune it. i know for a fact an UNtuned 3" exhaust outperforms a tune 2.5" exhaust as well
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Old 12-26-2010, 12:58 AM
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Re: Can a tune HURT your engine?

Tunes are everything with our cars. Although, I wouldn't bother spending money on a tune when you've only got an exhaust and intake.
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Old 12-26-2010, 06:28 AM
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Re: Can a tune HURT your engine?

Quote:
Originally Posted by Terror View Post
I was lectured at the table today during xmas, that tuning a car with new 3in exhaust and v2 intake will actually hurt the engine. For the reason you are surging more fuel and air into it (now that it can breath easier) then factory set. Almost like a mini boost. I tried to argue that the h engine isn't like that (standard american is what I was aiming for), and there's some room in it for improved performance without having to rebuild the internals. It IS a high performance 4 cylinder engine. I read somewhere that you can even put a boost with 5-7 psi on it and you wont be in danger of blowing anything stock on it.

But the fact that you are pushing it further then factory is a good point. So I want to be sure, or have the right intel to be able to tell them it isnt a real threat. Will a good tune be significant enough however, to actually put strain on the engine.
A good tune will take strain off of your engine. When you start adding different things to your engine like cams or high compression pistons without a tune, the stock program on your ecu doesn't know how to automatically correct itself to use those parts the most efficiently. A tune is doing exactly that and in turn lightening the load on your engine by correctly programming your ecu with the proper map for the parts that you have.


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Originally Posted by Vanz__ View Post
Tunes are everything with our cars. Although, I wouldn't bother spending money on a tune when you've only got an exhaust and intake.
I also agree with this, although a tune wouldn't hurt in any way, it is really unnecessary for just the exhaust and intake. Wait to spend your money after you get some real work done to your engine.
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Old 12-26-2010, 10:14 AM
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Re: Can a tune HURT your engine?

Alright I might wait. What about the people who say they can, or have friends who can hook a laptop up to their ECU and they'll gain like 30 hp. I imagine that would be a "bad" tune, just telling the car to push more fuel then it already is completely, or close to stock.
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Old 12-26-2010, 01:30 PM
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Re: Can a tune HURT your engine?

just to chime in here a good tune is not hurting anything as long as is done correctly ,so that the engine performance up grades are all in communication with each other,haven't said that there is a basic upgrades that don't need any tunning at all,thats what you have ,just do some research you be fine and also come back to the prelude zone it well find answers, any question hit me back.
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Old 12-26-2010, 03:15 PM
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Re: Can a tune HURT your engine?

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Originally Posted by Terror View Post
Alright I might wait. What about the people who say they can, or have friends who can hook a laptop up to their ECU and they'll gain like 30 hp. I imagine that would be a "bad" tune, just telling the car to push more fuel then it already is completely, or close to stock.
It depends. An engine is basically a pump: fuel and air mixture in, exhaust gases out. On the street, that pump has to operate efficiently from idle to redline, so stock ECUs are tuned to accordingly, with the sweet spot in range they expect the engine to operate most of the time. Valvetrain and chip memory limits (crude fuel/air maps) used to mean engines ran a little rich at idle and a little lean at the top, so there was a little margin to increase power at the top end by pushing more fuel, usually at the expense of performance lower in the rev range. Improved valvetrains -- initially, more cars running multi-valve heads, later, variable valve timing (VTEC and others) -- coupled with improved chips (more memory = larger, more refined maps) have diminished the value of rechipping a stock engine. Some engines, particularly those tuned for maximum fuel economy, can still benefit from remapping, but for the most part, simply pumping more fuel in just makes the engine run dirty. Running too little fuel can hurt the engine, particularlly if running higher cylinder head pressures via a higher compression ratio or forced induction -- running lean leads to detonation, holed or melted pistons, and associated mayhem. Be very careful leaning out an engine!

From what I've seen, Honda does a pretty decent job of tuning its engines in stock form -- I haven't seen chips deliver significant performance gains unless accompanied by raising the redline (peak engine power is related to engine speed) and making mechanical adjustments to improve airflow on the top end of the rev range.
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Old 12-26-2010, 03:24 PM
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Re: Can a tune HURT your engine?

the only thing i can think of that is harmful to your engine as a byproduct of tuning is more heat. more power always equals more heat. however it takes a considerable amount of power before you need an aftermarket cooling system. the laptops people are hooking up to their cars are what is used for tuning. if you don't know what you're doing and you put more fuel when its not required or is harmful or retard the timing timing when its not required or is harmful, that's called a bad tune. there are many ways to tune a motor that are still considered safe. some people have moderate tunes meant for decent power but gives the best gas mileage for daily driving. when they go to a race, they put a different tune that gives more power but reduces the gas mileage. doesn't necessarily mean its worse for the engine.
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Old 12-26-2010, 03:33 PM
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Re: Can a tune HURT your engine?

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Originally Posted by Terror View Post
Alright I might wait. What about the people who say they can, or have friends who can hook a laptop up to their ECU and they'll gain like 30 hp. I imagine that would be a "bad" tune, just telling the car to push more fuel then it already is completely, or close to stock.

That's not necessarily true. Some guys have the capability to hook up their laptop to their ECU to change the mapping. An example would be:

1) A street use map that is used for commuting daily

2) A race map used to obviously race, this map would take full advantage of the engine's HP and be good only for driving at high RPM's and short distances (racing) and would suffer under normal street driving conditions

Some guys have 6,7, or whatever number of maps saved for their car on their laptops but for the most part only run the best 2. Both of these tunes are optimal for this cars engine set up but only for certain types of driving. Does that make sense?

This isn't the best explanation sorry but kind of a light weight description.
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Old 12-26-2010, 09:29 PM
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Re: Can a tune HURT your engine?

Bro you gotta get your vtech cracking as low as possible, I'd recommend 2.5k, that way you can maximize your torque. When I did this I hit 97ft lbs of torque at the wheels, its legit.
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Old 12-26-2010, 09:35 PM
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Re: Can a tune HURT your engine?

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Originally Posted by vtech_is_best View Post
Bro you gotta get your vtech cracking as low as possible, I'd recommend 2.5k, that way you can maximize your torque. When I did this I hit 97ft lbs of torque at the wheels, its legit.
you're obviously an asshole. find some other forum to mess with when you're bored kid
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Old 12-26-2010, 09:49 PM
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Re: Can a tune HURT your engine?

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Originally Posted by vtech_is_best View Post
Bro you gotta get your vtech cracking as low as possible, I'd recommend 2.5k, that way you can maximize your torque. When I did this I hit 97ft lbs of torque at the wheels, its legit.
I lol'd.
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