HKS 264 cams - before and after dyno sheets and impression
Jun 23, 2003, 09:24 AM
#31
You can adjust idle with the base idle set screw. But that is really only used to set the bypass orifice so that the idle air controller is in the middle of its throw. The ECU controls the idle ultimately. So if you adjust the BISS to 950RPMs, the ECU will just turn the idle back down. You can do this repeatedly until the ECU has run out of ISC (Idle speed controller) adjustment, though. I wouldn't recommend it, since the idle would be pretty erratic.
Jun 23, 2003, 09:51 AM
#32
Originally posted by Shahul X
you cannot raise the idle? but it seems there is no issue with the 272 cams idle... but the 264's do ALFRIEDESQ??? the 272's produce how much more power...and larger injectors will be needed, like what size? and do you need an in-tank feul pump?
oh, lastly, how much would all this kill the MPG?
-shahul
you cannot raise the idle? but it seems there is no issue with the 272 cams idle... but the 264's do ALFRIEDESQ??? the 272's produce how much more power...and larger injectors will be needed, like what size? and do you need an in-tank feul pump?
oh, lastly, how much would all this kill the MPG?
-shahul
The issue is what is your application and what will run best on your car
I rather run the 264's now - - then upgrade to the 272 when and if they are needed - with a quality product like HKS I can always sell them used and recover much of my initial outlay
Jun 23, 2003, 10:28 AM
#34
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Originally posted by ShapeGSX
You can adjust idle with the base idle set screw. But that is really only used to set the bypass orifice so that the idle air controller is in the middle of its throw. The ECU controls the idle ultimately. So if you adjust the BISS to 950RPMs, the ECU will just turn the idle back down. You can do this repeatedly until the ECU has run out of ISC (Idle speed controller) adjustment, though. I wouldn't recommend it, since the idle would be pretty erratic.
You can adjust idle with the base idle set screw. But that is really only used to set the bypass orifice so that the idle air controller is in the middle of its throw. The ECU controls the idle ultimately. So if you adjust the BISS to 950RPMs, the ECU will just turn the idle back down. You can do this repeatedly until the ECU has run out of ISC (Idle speed controller) adjustment, though. I wouldn't recommend it, since the idle would be pretty erratic.
-shahul
Jun 23, 2003, 01:02 PM
#36
Originally posted by value
Why install cams without adj pulleys ??
Why install cams without adj pulleys ??
The only reason to get them, IMO , is if your cam gear height above the crank has changed due to a block or head resurface.
Jun 23, 2003, 02:46 PM
#37
Originally posted by ShapeGSX
Because you don't need them. They are also a liability. If the bolts loosen on the cam gears, you are looking at bent valves.
The only reason to get them, IMO , is if your cam gear height above the crank has changed due to a block or head resurface.
Because you don't need them. They are also a liability. If the bolts loosen on the cam gears, you are looking at bent valves.
The only reason to get them, IMO , is if your cam gear height above the crank has changed due to a block or head resurface.
Jun 23, 2003, 04:01 PM
#38
I believe that the ECU checks for misfires by checking the crank angle signal delay from power stroke to power stroke. If there is a large variance between one power stroke to the next, there is a misfire. I don't believe that the cam angle sensor is involved at all. There isn't as much resolution at the cam angle sensor as there is at the crank. He may have been getting real misfires.
If you change the distance between the cams and the crank, the cams will be mis-timed with respect to the crank, and using a degree wheel and adjustable cam gears is the only way to get it back to stock.
To get around SHiv's problem, if there really is one, just slot the holes on the cam angle sensor and rotate it until the crank and cam activity is aligned.
If you change the distance between the cams and the crank, the cams will be mis-timed with respect to the crank, and using a degree wheel and adjustable cam gears is the only way to get it back to stock.
To get around SHiv's problem, if there really is one, just slot the holes on the cam angle sensor and rotate it until the crank and cam activity is aligned.
Jun 23, 2003, 04:59 PM
#39
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hmmm... this will be my Fall project.... im still getting confused here... okay 264 or 272 cams... or in conjunction... but will need
1. larger injectors...what size?
and 2. in tank feul pump?
-shahul
1. larger injectors...what size?
and 2. in tank feul pump?
-shahul
Jun 23, 2003, 05:34 PM
#41
Quantify the amount of power that will be lost because of not using adjustable cam gears.
I'm guessing that a lot of what is seen from using adjustable cam gears might actually come from the adjustment of the cam angle sensor that comes with the cam gear adjustment.
I'm guessing that a lot of what is seen from using adjustable cam gears might actually come from the adjustment of the cam angle sensor that comes with the cam gear adjustment.
Jun 23, 2003, 06:11 PM
#42
Read article in vol 10 EVO mag. They started at 382.5 ps 49.2 KG at 0 deg and made 5 different changes to intake and exhaust cam timing and got the final best combo to put out 411.5 ps 51.1 kg . Final timing was intake 110 exhaust 105 degrees. Cams were from Tomei. 
Last edited by value; Jun 23, 2003 at 06:18 PM.
Jun 23, 2003, 06:12 PM
#43
Cam sprockets alone aren't primarily used to gain power. It's used to shift the powerband or help regain timing from wild cams. Any addition HP from it by shifting the band is icing, which is gained from tuning.
Last edited by n00dle; Jun 23, 2003 at 06:15 PM.
Jun 23, 2003, 06:24 PM
#44
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Originally posted by n00dle
Cam sprockets alone aren't primarily used to gain power. It's used to shift the powerband or help regain timing from wild cams. Any addition HP from it by shifting the band is icing, which is gained from tuning.
Cam sprockets alone aren't primarily used to gain power. It's used to shift the powerband or help regain timing from wild cams. Any addition HP from it by shifting the band is icing, which is gained from tuning.
Shiv