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Speed Shop Tuning and Modification Are Chip Upgrades Worth It?
84 messages, Last post on Jul 20, 2009 at 8:18 AM
You are in the Speed Shop Tuning and Modification Forum. Your Host is steve_
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Do not EVER believe a manufacturers claim about HP improvement with a chip. On an n/a, street car, a mail order tune on a chip will have extremely marginal improvement. Anyone who says that they can feel the difference with the bott-o-meter, is only only noticing the fact that their wallet is thinner. I have seen many a car on a dyno with a mail-order tune where the car actually made less power, yet the owner swore it was faster. On a 300 hp car, expect to see about 5-8 rwhp improvement at most, UNLESS, the original tune was pig-rich to begin with. Chips should pretty much never be used unless you are getting a custom dyno-tune. And on a stock car, even a custom tune makes only a small difference. If you see larger gains, then something was wrong with the car to begin with. Things change a bit on a turbo car, because the tune can adjust the waste gate setting and you might be able to make more boost. With an s/c, you can also make improvements presuming the original tune left some power on the table. Chips basically make power by advancing timing a bit, and leaning the a/f. This is why you generally need to run higher octane. If you have an automatic, you will benefit by having a tune/chip because you can adjust the way the car shifts. This makes the car shift faster and firmer. On a deisel, a chip can make measurable power even with a mail-order tune, but that is the exception. There are some cases with certain cars, where adding a chip in conjunction with a CIA can add pretty good power so long as the tune on the chip is a dyno proven match for the CIA. Chips void all warranties! If you use a chip and get caught, you are hosed. This si why using a flash tuner is much better. This way the tune can be installed and removed w/o using a physical chip and no one will ever know the tune was there. I have used chips, hand-held programmers and multi-position chips. I currently use an SCT 4 Position Switch Chip with 4 custom tunes on an after-market supercharged application. The car is dyno-tuned. A dyno tune WITH a chip will typically cost around $500 on a stock or near-stock application. If you are really interested, find a local tuner in the area who uses either SCT or Diablo and get it on the dyno if you really care. Otherwise, don't waste your money on a mail-order tune. Make sure the tuner has experience with your car. |
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Replying to: waterdr (Jan 18, 2008 12:38 am) -mike Motorsports and Modifications Host
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Replying to: paisan (Jan 18, 2008 6:26 am) One change I made, for $300, did only 1 thing, it removed the knock/ping detector input. This let the ignition advance up to 50 deg. Unless I ran two cans of octane booster on top of Premium gas, the engine would ping like mad. Note that most "Octane Boosters" are just kerosene and some detergent to clean your fuel system. I won't name the one I used, but it was made for "Off Road Use Only" and wasn't for use on cat equipped cars. The real downside was that, at that time a gallon of gas cost about $2.25.9 and the cost of a can of booster was $5.00. So 15 Gal of gas cost about $44. I got 10MPG in that truck with the computer on performance mode. Point is, be careful what you put on/in your car, the long term cost might shock you.
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Replying to: paisan (Jan 18, 2008 6:26 am) |
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Replying to: phaetondriver (Jan 18, 2008 9:50 am) Octane boosters are all the same. Actually, there are two types. One that works and one that does not. The cheap crap is nothing more then cleaners and essentially alcohol. You get a small amount of octane increase....usually something like 0.1 to 0.2 octane points. The good stuff has MMT. There is no other way to do it. I have a sneaky suspicion that I know what you used - lol - and it has a lot of MMT in it, though, they won't tell you and it is not listed on the MSDS. MMT works VERY well. BUT, it will wreck your O2 sensors and it coats the spark plugs. It is unlcear if the reddish dirt that forms on the plugs hampers performance, but it makes reading the plugs impossible which sucks if you are racing. I always keep a bottle of it in my trunk and use it if I have no other choice. My car was tuned for 93 Octane. It runs fine on 92, but if I am stuck with 91, a half bottle goes in the tank. I am going to get a 91 Octane tune this spring to suppliment the 93 to avoid these situations. I also have an 89 octane tune. I would never use 89, but most of time, I drive with this tune. It keeps the cyclinders running a bit cooler and is less harsh on the car. I really don't notice the 30 hp loss certainly for normal driving. What REALLY aggrevates me, is when people make rediculous comments about the amount of HP some cheap, bolt-on mod will make. I hate to stereotype, but it seems like the younger the driver, and the fewer the cyclinders, the more hp a CIA seems to make - lol I do not believe any claims w/o a dyno unless someone is using the same configuration that has been dyno proven and is posted. As car guys, we work hard for our money and when people post silly claims, less suspecting people believe it and then spend their hard, earned money expecting something that will never happen. BTW, there is a lot of evidence that adding octane booster to 87 octane fuel works a tiny bit, but does nothing, in fact, lowers hp output when added to slightly higher grades of fuel. I have seen a few tests that concluded this. |
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Replying to: inguano (Jan 13, 2008 9:32 am) |
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hi i just bought a diablo sport predator tuner for my 7.3 diesel is their anything i should be worried about or know before i install it. any info thanks
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Replying to: ethanwkolsen (Feb 06, 2008 8:00 pm) |
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Hey i have a 2001 chevy HD and i wan to make it faster and have more power with pulling so i was woundering which performance chip would be the best.
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Replying to: getzy2323 (Jun 19, 2009 5:42 am) Chips have modest gains, at best, and as previous posters have said there are alternatives now as many cars support various types of reprogamming of the stock computer (ECU). Turbocharged cars generally respond the best to chips and/or ECU reprogramming but this generally voids the warranty and can be risky. It can also be easy, reliable horsepower. 
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