Chipping non-turbos
Discussion
What does chipping actually do, on a naturally aspirated car? Are there reasonable gains or is it not worth it?
I understand it can change the ignition advance so it runs closer to 'knock' - fair enough. But what would it change in the fuel injection area? Do cars from the factory really run too rich or too lean?? Surely that would be bad for the engine?
So where does the power come from in chipping a n/a engine, if anywhere? I know that the effect of changing the ignition advance varies from engine to engine, depending on a particular engine's ignition slope(?).
I ask because I've had a crazy idea of experimenting with home-made 'piggyback' chip modifications on old Mercedes - I even have a data logger than can measure acceleration so could produce graphs of the changes. Wondered if it's worth it, perhaps just as a learning exercise?
I understand it can change the ignition advance so it runs closer to 'knock' - fair enough. But what would it change in the fuel injection area? Do cars from the factory really run too rich or too lean?? Surely that would be bad for the engine?
So where does the power come from in chipping a n/a engine, if anywhere? I know that the effect of changing the ignition advance varies from engine to engine, depending on a particular engine's ignition slope(?).
I ask because I've had a crazy idea of experimenting with home-made 'piggyback' chip modifications on old Mercedes - I even have a data logger than can measure acceleration so could produce graphs of the changes. Wondered if it's worth it, perhaps just as a learning exercise?
Pentoman said:
What does chipping actually do, on a naturally aspirated car? Are there reasonable gains or is it not worth it?
I understand it can change the ignition advance so it runs closer to 'knock' - fair enough. But what would it change in the fuel injection area? Do cars from the factory really run too rich or too lean?? Surely that would be bad for the engine?
So where does the power come from in chipping a n/a engine
Do you think every single engine is tuned for optimum performance from the factory ?I understand it can change the ignition advance so it runs closer to 'knock' - fair enough. But what would it change in the fuel injection area? Do cars from the factory really run too rich or too lean?? Surely that would be bad for the engine?
So where does the power come from in chipping a n/a engine
No.
"Chipping" which is about as shite a term as "re-mapping" both of which ged bandied about something shocking these days.
Basically it should involve someone re-tuning the ignition and fuelling settings for the engine, to give better performance.
This may involve more or less timing, or more or less fuel. All engines will respond differently, so lots of testing would need to be done, in order to offer some sort of plug in "chip" that will offer benefits.
Most are a waste of money n/a these days, IMO.
Mave said:
I think main benefits are "driveability" where manufacturers tend to map lean at the points where economy numbers are derived eg 56mph in 5th.
Gotcha.. okstevieturbo said:
Pentoman said:
What does chipping actually do, on a naturally aspirated car? Are there reasonable gains or is it not worth it?
I understand it can change the ignition advance so it runs closer to 'knock' - fair enough. But what would it change in the fuel injection area? Do cars from the factory really run too rich or too lean?? Surely that would be bad for the engine?
So where does the power come from in chipping a n/a engine
Do you think every single engine is tuned for optimum performance from the factory ?I understand it can change the ignition advance so it runs closer to 'knock' - fair enough. But what would it change in the fuel injection area? Do cars from the factory really run too rich or too lean?? Surely that would be bad for the engine?
So where does the power come from in chipping a n/a engine
No.
"Chipping" which is about as shite a term as "re-mapping" both of which ged bandied about something shocking these days.
Basically it should involve someone re-tuning the ignition and fuelling settings for the engine, to give better performance.
Would I be likely to get a noticeable difference? Old mercs generally only accomodate up to 95RON fuel.
How long is a piece of string ?
Given most chips are generic, they cant exactly tune them optimal for each engine.
So that is holding them back from producing the best results they can. The only way to get the most from an engine, is to tune each individual engine, on the fuel you intend to use.
Unless you have some way of doing that, I wouldnt bother with a pre-programmed chip, unless they have an excellent reputation in terms of producing the goods.
Perhaps looking into some sort of piggy back ecu that can be mapped to your needs might be better ?
Or more expensive, just go for a full stand alone ecu, and dump the factory one.
Given most chips are generic, they cant exactly tune them optimal for each engine.
So that is holding them back from producing the best results they can. The only way to get the most from an engine, is to tune each individual engine, on the fuel you intend to use.
Unless you have some way of doing that, I wouldnt bother with a pre-programmed chip, unless they have an excellent reputation in terms of producing the goods.
Perhaps looking into some sort of piggy back ecu that can be mapped to your needs might be better ?
Or more expensive, just go for a full stand alone ecu, and dump the factory one.
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