wat is peak and hold and saturated?
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Re: wat is peak and hold and saturated?
Peak and hold is a low impedance injector, saturated is a high impedance injector.
Impedance is the amount of a resistance an injector has, typically high or low. It's measured in ohms (represented by Omega sign) with high impedance being 12-16 ohms and low impedance being 2-6 ohms.
Impedance is the amount of a resistance an injector has, typically high or low. It's measured in ohms (represented by Omega sign) with high impedance being 12-16 ohms and low impedance being 2-6 ohms.
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From: hmt noggs
Re: wat is peak and hold and saturated?
^ there is a bigger difference than just resistance values, why do you think an injector driver is sometimes neccessary.
Found this on honda swap pretty good should fill you in.
There are two basic types of injectors that work on Honda and acura cars. How they operate are totally different. Let's take a look.
Peak and Hold:
Peak/hold injectors are low impedence, usually in the 1-4 ohm range. When the ecu calls for fuel to be injected, it sends out voltage via the wire clips until a certain current level is reached (the peak part) (varies by injector size, company). For the duration of 1 pulse width, that current is slightly reduced and held (the hold part).
Advantages of this design:
* minimizes the injectors "on" time, resulting in faster response
Disadvantages of this design:
* increases coil heat, which can lead to failure over time
Saturated:
Saturated injectors are generally higher impedence than peak and hold, running in about the 10-15 ohms range. Unlike peak/hold, a saturated injector remains "on" for the entire pulse width.
Advantages of this design:
* reduces heat
Disadvantages of this design:
* slower response time
* can't handel large CC or lb/hr styles due to limitations in its speed.
So, which should I choose?
There are a ton of factors involved in this.
* First, power level. If you're going big, there simply won't be a saturated injector that will support your power level. The largest common saturated injecotrs on the market are 550cc, with 440cc being a common "cap" in saturated size. Most boosted people run peak/hold setups for not only their availibilty, but also their ease of upgrading later on if so desired. simply swap the injectors. no need to re-wire again.
* How is your car wired? most obd0 civics and some preludes are wired for peak/hold and have a resisitor box already. No point in changing to a saturated. Obd1+2 civics, and most other honda/acura cars after 1992 are all saturated and are not wired with resisitor boxes. Again, if there is an injector availble in your power range for flow of your car's design
type, there's little sense to change.
* Price. DSM eclipse/talon 450cc peak and hold injectors fit honda rails and with just a minor modification plug right in. best of all, these can be had for about $50-75 a set of 4 instead of $350+ for a set of aftermarket injectors. Add a $25 resistor box from an obd0 civic/crx, wire it up, and you're good to go in you're saturated car.
Found this on honda swap pretty good should fill you in.
There are two basic types of injectors that work on Honda and acura cars. How they operate are totally different. Let's take a look.
Peak and Hold:
Peak/hold injectors are low impedence, usually in the 1-4 ohm range. When the ecu calls for fuel to be injected, it sends out voltage via the wire clips until a certain current level is reached (the peak part) (varies by injector size, company). For the duration of 1 pulse width, that current is slightly reduced and held (the hold part).
Advantages of this design:
* minimizes the injectors "on" time, resulting in faster response
Disadvantages of this design:
* increases coil heat, which can lead to failure over time
Saturated:
Saturated injectors are generally higher impedence than peak and hold, running in about the 10-15 ohms range. Unlike peak/hold, a saturated injector remains "on" for the entire pulse width.
Advantages of this design:
* reduces heat
Disadvantages of this design:
* slower response time
* can't handel large CC or lb/hr styles due to limitations in its speed.
So, which should I choose?
There are a ton of factors involved in this.
* First, power level. If you're going big, there simply won't be a saturated injector that will support your power level. The largest common saturated injecotrs on the market are 550cc, with 440cc being a common "cap" in saturated size. Most boosted people run peak/hold setups for not only their availibilty, but also their ease of upgrading later on if so desired. simply swap the injectors. no need to re-wire again.
* How is your car wired? most obd0 civics and some preludes are wired for peak/hold and have a resisitor box already. No point in changing to a saturated. Obd1+2 civics, and most other honda/acura cars after 1992 are all saturated and are not wired with resisitor boxes. Again, if there is an injector availble in your power range for flow of your car's design
type, there's little sense to change.
* Price. DSM eclipse/talon 450cc peak and hold injectors fit honda rails and with just a minor modification plug right in. best of all, these can be had for about $50-75 a set of 4 instead of $350+ for a set of aftermarket injectors. Add a $25 resistor box from an obd0 civic/crx, wire it up, and you're good to go in you're saturated car.
Re: wat is peak and hold and saturated?
^ there is a bigger difference than just resistance values, why do you think an injector driver is sometimes neccessary.
Found this on honda swap pretty good should fill you in.
There are two basic types of injectors that work on Honda and acura cars. How they operate are totally different. Let's take a look.
Peak and Hold:
Peak/hold injectors are low impedence, usually in the 1-4 ohm range. When the ecu calls for fuel to be injected, it sends out voltage via the wire clips until a certain current level is reached (the peak part) (varies by injector size, company). For the duration of 1 pulse width, that current is slightly reduced and held (the hold part).
Advantages of this design:
* minimizes the injectors "on" time, resulting in faster response
Disadvantages of this design:
* increases coil heat, which can lead to failure over time
Saturated:
Saturated injectors are generally higher impedence than peak and hold, running in about the 10-15 ohms range. Unlike peak/hold, a saturated injector remains "on" for the entire pulse width.
Advantages of this design:
* reduces heat
Disadvantages of this design:
* slower response time
* can't handel large CC or lb/hr styles due to limitations in its speed.
So, which should I choose?
There are a ton of factors involved in this.
* First, power level. If you're going big, there simply won't be a saturated injector that will support your power level. The largest common saturated injecotrs on the market are 550cc, with 440cc being a common "cap" in saturated size. Most boosted people run peak/hold setups for not only their availibilty, but also their ease of upgrading later on if so desired. simply swap the injectors. no need to re-wire again.
* How is your car wired? most obd0 civics and some preludes are wired for peak/hold and have a resisitor box already. No point in changing to a saturated. Obd1+2 civics, and most other honda/acura cars after 1992 are all saturated and are not wired with resisitor boxes. Again, if there is an injector availble in your power range for flow of your car's design
type, there's little sense to change.
* Price. DSM eclipse/talon 450cc peak and hold injectors fit honda rails and with just a minor modification plug right in. best of all, these can be had for about $50-75 a set of 4 instead of $350+ for a set of aftermarket injectors. Add a $25 resistor box from an obd0 civic/crx, wire it up, and you're good to go in you're saturated car.
Found this on honda swap pretty good should fill you in.
There are two basic types of injectors that work on Honda and acura cars. How they operate are totally different. Let's take a look.
Peak and Hold:
Peak/hold injectors are low impedence, usually in the 1-4 ohm range. When the ecu calls for fuel to be injected, it sends out voltage via the wire clips until a certain current level is reached (the peak part) (varies by injector size, company). For the duration of 1 pulse width, that current is slightly reduced and held (the hold part).
Advantages of this design:
* minimizes the injectors "on" time, resulting in faster response
Disadvantages of this design:
* increases coil heat, which can lead to failure over time
Saturated:
Saturated injectors are generally higher impedence than peak and hold, running in about the 10-15 ohms range. Unlike peak/hold, a saturated injector remains "on" for the entire pulse width.
Advantages of this design:
* reduces heat
Disadvantages of this design:
* slower response time
* can't handel large CC or lb/hr styles due to limitations in its speed.
So, which should I choose?
There are a ton of factors involved in this.
* First, power level. If you're going big, there simply won't be a saturated injector that will support your power level. The largest common saturated injecotrs on the market are 550cc, with 440cc being a common "cap" in saturated size. Most boosted people run peak/hold setups for not only their availibilty, but also their ease of upgrading later on if so desired. simply swap the injectors. no need to re-wire again.
* How is your car wired? most obd0 civics and some preludes are wired for peak/hold and have a resisitor box already. No point in changing to a saturated. Obd1+2 civics, and most other honda/acura cars after 1992 are all saturated and are not wired with resisitor boxes. Again, if there is an injector availble in your power range for flow of your car's design
type, there's little sense to change.
* Price. DSM eclipse/talon 450cc peak and hold injectors fit honda rails and with just a minor modification plug right in. best of all, these can be had for about $50-75 a set of 4 instead of $350+ for a set of aftermarket injectors. Add a $25 resistor box from an obd0 civic/crx, wire it up, and you're good to go in you're saturated car.
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