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#1
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Performance Chips
I have been looking at performance chips promising more horsepower and
better fuel economy. Prices range from $4 to over $400. Many are no-name items sold on e-bay and some are well know names like Conforti and Dinan. Does anyone have any first hand experience with these chips. Do they actually work? If so, which is best? |
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#2
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Performance Chips
I put a bavauto chip in mine -- It does feel different driving it. Not faster, really; but like the car is "lighter" (735i) definately peppy-er now... According to them it remaps the entire throttle -- as I understand it; dinan maps WOT (80% - 100%) but don't quote me on that at all! For kicks I bought a $25 chip off ebay -- put it on. put the original chip in - put the 25 back on -- but my bavauto on. the 25 chip did feel different that stock, but not as much as the bav auto. I'd guess the 25 chip guys bought (or borrowed) a real chip, used an eprom burner they had work and burned a bunch of copies; stuck their own label on it & figured they'd make a few bucks. (don't quote me) The one I bought had outragous claims that just couldn't be true "40 hp gain" and also claimed they developed the fuel mapping themselves. but it did do something. I gave the chip to a friend, who put it in; took it out & tossed it. he wasn't willing to risk damage to his baby with a no-name chip -- I would stick with brand / respected names. On Sun, 4 Jun 2006 23:02:04 -0700, "ETW" > wrote: >I have been looking at performance chips promising more horsepower and >better fuel economy. Prices range from $4 to over $400. Many are no-name >items sold on e-bay and some are well know names like Conforti and Dinan. >Does anyone have any first hand experience with these chips. Do they >actually work? If so, which is best? > --- AntiSpam/harvest --- Remove X's to send email to me. |
#3
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Performance Chips
"ETW" > wrote in message ... >I have been looking at performance chips promising more horsepower and >better fuel economy. Prices range from $4 to over $400. Many are no-name >items sold on e-bay and some are well know names like Conforti and Dinan. >Does anyone have any first hand experience with these chips. Do they >actually work? If so, which is best? You may get a slight horsepower increase in the newer cars or a significant increase on the earlier cars. Rev limiter is usually bumped a couple 100 RPM. The top speed limiter is disabled. With the electronic throttle cars, the throttle response is quickened. I don't think you'll see a fuel economy improvement. R / John |
#4
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Performance Chips
John Carrier wrote: > "ETW" > wrote in message > ... >> I have been looking at performance chips promising more horsepower and >> better fuel economy. Prices range from $4 to over $400. Many are no-name >> items sold on e-bay and some are well know names like Conforti and Dinan. >> Does anyone have any first hand experience with these chips. Do they >> actually work? If so, which is best? > > You may get a slight horsepower increase in the newer cars or a significant > increase on the earlier cars. Rev limiter is usually bumped a couple 100 > RPM. The top speed limiter is disabled. With the electronic throttle cars, > the throttle response is quickened. I don't think you'll see a fuel economy > improvement. I recently red that over time, the OBD2 system eventually overrides the custom programming to get the car back to the design parameters. I believe this happened with my wife's VW turbo. After about a year we could hardly tell the difference between chip mode and stock. Anyone else heard of this? |
#5
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Performance Chips
"Rex B" > wrote
> John Carrier wrote: >> You may get a slight horsepower increase in the newer cars or a >> significant increase on the earlier cars. Rev limiter is usually bumped >> a couple 100 RPM. The top speed limiter is disabled. With the >> electronic throttle cars, the throttle response is quickened. I don't >> think you'll see a fuel economy improvement. > > I recently red that over time, the OBD2 system eventually overrides the > custom programming to get the car back to the design parameters. I > believe this happened with my wife's VW turbo. After about a year we > could hardly tell the difference between chip mode and stock. > Anyone else heard of this? As a programmer, that's bull****. The chip has the fuel/ignition map that is used to run the engine, which can't be changed by OBD2, nor would OBD2 know what the "design params" are in the first place. FloydR |
#6
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Performance Chips
Floyd Rogers wrote:
> "Rex B" > wrote > >>John Carrier wrote: >> >>>You may get a slight horsepower increase in the newer cars or a >>>significant increase on the earlier cars. Rev limiter is usually bumped >>>a couple 100 RPM. The top speed limiter is disabled. With the >>>electronic throttle cars, the throttle response is quickened. I don't >>>think you'll see a fuel economy improvement. >> >>I recently red that over time, the OBD2 system eventually overrides the >>custom programming to get the car back to the design parameters. I >>believe this happened with my wife's VW turbo. After about a year we >>could hardly tell the difference between chip mode and stock. >> Anyone else heard of this? > > > As a programmer, that's bull****. The chip has the fuel/ignition map > that is used to run the engine, which can't be changed by OBD2, nor > would OBD2 know what the "design params" are in the first place. Yeah, I'd bet mnoney that what got reprogrammed over that year's time was Rex's remembery of what it used to feel like... -- -Fred W |
#7
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Performance Chips
Fred W wrote: > Floyd Rogers wrote: >> "Rex B" > wrote >> >>> John Carrier wrote: >>> >>>> You may get a slight horsepower increase in the newer cars or a >>>> significant increase on the earlier cars. Rev limiter is usually >>>> bumped a couple 100 RPM. The top speed limiter is disabled. With >>>> the electronic throttle cars, the throttle response is quickened. I >>>> don't think you'll see a fuel economy improvement. >>> >>> I recently red that over time, the OBD2 system eventually overrides >>> the custom programming to get the car back to the design parameters. >>> I believe this happened with my wife's VW turbo. After about a year >>> we could hardly tell the difference between chip mode and stock. >>> Anyone else heard of this? >> >> >> As a programmer, that's bull****. The chip has the fuel/ignition map >> that is used to run the engine, which can't be changed by OBD2, nor >> would OBD2 know what the "design params" are in the first place. > > Yeah, I'd bet mnoney that what got reprogrammed over that year's time > was Rex's remembery of what it used to feel like... That could well be. I attributed it to degradation of performance due to the accumulating miles. But some of those chip upgrades are piggy-backed onto the stock chip, or attached via the diag connector, so it's conceivable that could be happening with some designs. On the VW the CPU chip was unsoldered and replaced, so that should kill any chance of it there. |
#8
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Performance Chips
Floyd Rogers wrote:
> > As a programmer, that's bull****. The chip has the fuel/ignition map > that is used to run the engine, which can't be changed by OBD2, nor > would OBD2 know what the "design params" are in the first place. I think the fuel map is used under normal operating conditions, but it could be overridden by emissions code based on what the O2 sensor, for example, is saying. That map is ignored, for example, in WOT conditions. In any case, it's not an unreasonable theory to think that something in the engine management code could override the fuel map. |
#9
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Performance Chips
On Mon, 05 Jun 2006 14:55:15 -0400, Nobody Important
> wrote: >Floyd Rogers wrote: >> >> As a programmer, that's bull****. The chip has the fuel/ignition map >> that is used to run the engine, which can't be changed by OBD2, nor >> would OBD2 know what the "design params" are in the first place. > >I think the fuel map is used under normal operating conditions, but it >could be overridden by emissions code based on what the O2 sensor, for >example, is saying. That map is ignored, for example, in WOT >conditions. In any case, it's not an unreasonable theory to think that >something in the engine management code could override the fuel map. Indeed, the rom-based maps are never ignored, as invoking such behavior would overly complicate the entire engine management system. The values that the maps cough up at any given moment are based on primary inputs such as throttle position sensor, MAF, etc. Those values are then further adjusted based on other real-time inputs such as you mentioned (o2 sensors, knock sensors, torque sensors, etc). "Performance chips" modify the base maps and rely on the ECU operating code to account for the real-time environment... Cheers |
#10
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Performance Chips
Rex B wrote: > > Fred W wrote: >> Floyd Rogers wrote: >>> "Rex B" > wrote >>> >>>> John Carrier wrote: >>>> >>>>> You may get a slight horsepower increase in the newer cars or a >>>>> significant increase on the earlier cars. Rev limiter is usually >>>>> bumped a couple 100 RPM. The top speed limiter is disabled. With >>>>> the electronic throttle cars, the throttle response is quickened. >>>>> I don't think you'll see a fuel economy improvement. >>>> >>>> I recently red that over time, the OBD2 system eventually overrides >>>> the custom programming to get the car back to the design >>>> parameters. I believe this happened with my wife's VW turbo. After >>>> about a year we could hardly tell the difference between chip mode >>>> and stock. >>>> Anyone else heard of this? >>> >>> >>> As a programmer, that's bull****. The chip has the fuel/ignition map >>> that is used to run the engine, which can't be changed by OBD2, nor >>> would OBD2 know what the "design params" are in the first place. >> >> Yeah, I'd bet mnoney that what got reprogrammed over that year's time >> was Rex's remembery of what it used to feel like... > > That could well be. I attributed it to degradation of performance due > to the accumulating miles. On re-reading that, I could be describing the car or the writer. Works either way |
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