solaratomic
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So it sounds as though I need to replace my knocking phaser and then worry about the limiters. Am I correct?
My car does not sound like the one in the Livernois clip. Adam at ST says that the JE Pistons are typically a little noisey at start up for the first 2-3 minutes. That is also when the noise goes away.
70k
My car does not sound like the one in the Livernois clip. Adam at ST says that the JE Pistons are typically a little noisey at start up for the first 2-3 minutes. That is also when the noise goes away.
70k
good infoActually all it is the silicon % on the metal alloy. For example most stock "hypereutectic pistons contain 20-25% silicon) Most pistons themselves are good but the problem with such a high silicon % is that they are brittle and you can say good bye to your ring lands in case of any detonation. Forged alloy 4032 contain around 12% silicon and they dont expand as much. Forged alloy 2618 contain around 3% silicon and they are noisey at start up and sound like "maracas" but these alloy can withstand a real beating.
Andrew
So it sounds as though I need to replace my knocking phaser and then worry about the limiters. Am I correct?
Actually all it is the silicon % on the metal alloy. For example most stock "hypereutectic pistons contain 20-25% silicon) Most pistons themselves are good but the problem with such a high silicon % is that they are brittle and you can say good bye to your ring lands in case of any detonation. Forged alloy 4032 contain around 12% silicon and they dont expand as much. Forged alloy 2618 contain around 3% silicon and they are noisey at start up and sound like "maracas" but these alloy can withstand a real beating.
Andrew
If it were my decision, I would do both at the same time. Otherwise you have to go into the cam covers a second time.
Just curious, if it's not a little 'slap' until they expand - then why does it go away after a few minutes of start-up?
Baby steps...I'm doin this on a fireman's salary
uhmmmm I still have my doubts about it in high hp cars. Theres a reason why the GT500 doesnt have it.
I didnt used the 5w-20 oil either.
i have a few questions for mike or andy. I have that knocking noise also so after reading this iam looking at getting your limiters. But, other then stopping the knocking will i see any hp gains with just intake, long tubes off road pipes? And lastly, tuning. From what i read someone says you can tune for them with an sct or diablo, others say you cant. So, whats the answer?
So, the VCT has also a role in the engines performance rather than only fuel efficiency?
I always thought the VCT was for fuel consumption.
What about the spring that is used in the limiters? how much can it handle before it breaks due to any reason?
The little spring is only there as a safety because upon original design I became worried that a one of the two pieces that was moving would tip and get sideways. After a lot more testing we found this was not the case really but I still feel more comfortable having the spring in there. Here is a link that relates more to the spring
http://www.modularfords.com/forums/showthread.php?t=120801&page=2
Thanks
Mike Schropp
Thanks Mike, If only locking out wouldnt "kill" some hp, that would be the best way to go hands down!
Can this be avoided with any special cam? any custom grind or something like that?
so if i find that the pin is loose (because my car has had the knock for a looong time now so i figure it will be) can i just get new pins and put them in when i put the limiters in? The tuning is the biggest thing holding me back from getting these, so if i can use a handheld (or get a "canned" tune from you guys) i'll be getting these next month.Installing the limiters or lockouts should eliminate the knocking noise if that is indeed where it is coming from. It is important to pay close attention to the cam phaser when you take them off to make sure that the little pin that locates on the camshaft is not loose. In a lot of cases if the car has been running for some time with the phaser knocking the pin will start to get beat out and may be loose. At this point installing the limiter or lockouts will help but it won't help with the failing pin.
You should see a HP gain from the intake and long pipes. As for the tuning that question is a little beyond me. I will ask though and see what the answer is.
Thanks
Mike