Ebay question
02-16-2005, 04:51 PM
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Re: Ebay question
cam gears really aren't all that useful on an otherwise stock engine. Unless your doing it strickly for looks. But typically they are priced individually, so buyer beware.
02-16-2005, 04:53 PM
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Re: Ebay question
Also, a lot of people seem to like the P28 ECU on the H22. But you really would have to have it remapped as the fuel curves aren't that great for the H22, and it also wont control the secondary intake butterflies.
02-19-2005, 04:45 PM
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Re: Ebay question
Originally Posted by Siextreme
cam gears really aren't all that useful on an otherwise stock engine. Unless your doing it strickly for looks. But typically they are priced individually, so buyer beware.
02-19-2005, 04:45 PM
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Re: Ebay question
Originally Posted by Siextreme
Also, a lot of people seem to like the P28 ECU on the H22. But you really would have to have it remapped as the fuel curves aren't that great for the H22, and it also wont control the secondary intake butterflies.
Thanks.
02-19-2005, 08:26 PM
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Re: Ebay question
ok.. ok.. here goes
The P28 ECU out of a civic vtec is what a lot of people with the H22 find works the best. However the P28 does not use, nor does it have provisions for a knock sensor. Which doesn't really make a huge hell of a difference as your knock sensor typically wont save your engine if something happenes.
Another thing that the P28 ecu does not control are the secondary intake butterflies in your intake manifold. Inside of your intake manifold (if your using a stock H22 intake manifold) are two sets of runners. At idle and lower rpms only half of them are used. This helps with lower rpm torque. At a higher RPM the other half open up via a solinoid on the back of your enigne. This solinoid is controlled by the normal P13 H22 computer, but the P28 is not setup for them, so they will not open. What most people do is to disconnect them, and just leave them open all the time. It hurts a little bit of the power off the line, but not some much to make a difference.
The other difference is that the fuel curves (amount of time the fuel injectors are open), and the timing curves aren't quite right for the H22. The engine that the P28 was intended to operate requires less fuel to function than the bigger H22. The easist way to fix this is to have the ECU reprogrammed (chipped) to use better fuel/timing curves.
Hope this helps you some.
The P28 ECU out of a civic vtec is what a lot of people with the H22 find works the best. However the P28 does not use, nor does it have provisions for a knock sensor. Which doesn't really make a huge hell of a difference as your knock sensor typically wont save your engine if something happenes.
Another thing that the P28 ecu does not control are the secondary intake butterflies in your intake manifold. Inside of your intake manifold (if your using a stock H22 intake manifold) are two sets of runners. At idle and lower rpms only half of them are used. This helps with lower rpm torque. At a higher RPM the other half open up via a solinoid on the back of your enigne. This solinoid is controlled by the normal P13 H22 computer, but the P28 is not setup for them, so they will not open. What most people do is to disconnect them, and just leave them open all the time. It hurts a little bit of the power off the line, but not some much to make a difference.
The other difference is that the fuel curves (amount of time the fuel injectors are open), and the timing curves aren't quite right for the H22. The engine that the P28 was intended to operate requires less fuel to function than the bigger H22. The easist way to fix this is to have the ECU reprogrammed (chipped) to use better fuel/timing curves.
Hope this helps you some.
02-20-2005, 04:29 PM
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Re: Ebay question
Originally Posted by Siextreme
ok.. ok.. here goes
The P28 ECU out of a civic vtec is what a lot of people with the H22 find works the best. However the P28 does not use, nor does it have provisions for a knock sensor. Which doesn't really make a huge hell of a difference as your knock sensor typically wont save your engine if something happenes.
Another thing that the P28 ecu does not control are the secondary intake butterflies in your intake manifold. Inside of your intake manifold (if your using a stock H22 intake manifold) are two sets of runners. At idle and lower rpms only half of them are used. This helps with lower rpm torque. At a higher RPM the other half open up via a solinoid on the back of your enigne. This solinoid is controlled by the normal P13 H22 computer, but the P28 is not setup for them, so they will not open. What most people do is to disconnect them, and just leave them open all the time. It hurts a little bit of the power off the line, but not some much to make a difference.
The other difference is that the fuel curves (amount of time the fuel injectors are open), and the timing curves aren't quite right for the H22. The engine that the P28 was intended to operate requires less fuel to function than the bigger H22. The easist way to fix this is to have the ECU reprogrammed (chipped) to use better fuel/timing curves.
Hope this helps you some.
The P28 ECU out of a civic vtec is what a lot of people with the H22 find works the best. However the P28 does not use, nor does it have provisions for a knock sensor. Which doesn't really make a huge hell of a difference as your knock sensor typically wont save your engine if something happenes.
Another thing that the P28 ecu does not control are the secondary intake butterflies in your intake manifold. Inside of your intake manifold (if your using a stock H22 intake manifold) are two sets of runners. At idle and lower rpms only half of them are used. This helps with lower rpm torque. At a higher RPM the other half open up via a solinoid on the back of your enigne. This solinoid is controlled by the normal P13 H22 computer, but the P28 is not setup for them, so they will not open. What most people do is to disconnect them, and just leave them open all the time. It hurts a little bit of the power off the line, but not some much to make a difference.
The other difference is that the fuel curves (amount of time the fuel injectors are open), and the timing curves aren't quite right for the H22. The engine that the P28 was intended to operate requires less fuel to function than the bigger H22. The easist way to fix this is to have the ECU reprogrammed (chipped) to use better fuel/timing curves.
Hope this helps you some.
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