Originally Posted by XChris1632X

Maybe I didn't give enough credit to some of the people on this site for their knowlege. I guess posting from my phone and trying to take the shortcut route was not the right move. As far as headgaskets, I do agree that lots of bad things can happen on cold engines regarding headgaskets. I do hold true to the effects that DP can have on headgaskets as well. What I really think kills headgaskets is peak combustion pressure. I dont think that any other ONE factor can cause one to blow alone, and I definatly just can't stand people to think that the amount of boost alone will take one out. I think heat mixed with timing, boost, drive pressure all play a role in hurting a gasket. As far as 90psi being an extreme number I dont agree. I have seen a few twin setups that are pushing 75psi and have 95psi DP. When you have that much drive pressure you have a whole lot of pressure not even making it back out of the cylinder before the next cycle. Boost pressures are also multiplied with the compression to a much higher number but through the engine cycle these pressures are all getting exerted. DP is the only one fighting back. I have had and been involved with a few builds where drive pressure had become an issue. It was also something I was exposed to early on by very successful engine builders and instructors. Most of what I believe about it comes from first hand experience. Some dont completely relate DP to cylinder pressure. I think that all the factors play an assisting role but the peak combustion pressure is what actually causes the HG to fail. It seems like many of the posts here lack a lot of good technical info. What I was really trying to point out was that amount of boost alone is not what will blow your gaskets apart. I believe it plays a part but that is it. And I surely do not believe that you can put a number on how much boost is too much before you will break something. I feel that it is very dependent on your setup as a whole.

As far as the Headbolts you are right, it is a common misconception that torque plus angle bolts are the same thing as TTY bolts. Many people incorrectly assume that a torque with angle method of tightening a bolt automatically means that it is a TTY bolt. Obviously not true. A torque angle spec can be applied to any fastener, not just to tty bolts. A torque to yield bolt is designed to stretch a certain amount and is to be used only once. Even ASE doesnt always decipher between the two correctly sometimes and I am guilty of wrongly refering to them as well. Call it lazyness or simplicity whatever, you are right. Either way, Can they stretch, hell yeah. Do I recommend them stretching, nope. This is another thing that I consider heat to play a huge role in but I have seen more than a few break from trying to go any farther. Even though they will stretch, how do you know when you cross that barrier of making them weaker than they were and actually causing them to hold less in the long term scheme of things? I know many say they are not completely stretched from the factory but I have seen more than a few times they end up broke using all the different methods. I will always agree they are an inferior piece in any situation over stock but I have had much better luck with leaving them alone then I have with trying to get them to do something they aren't greatly capable of doing in the first place.

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So wait here your basically attesting to the fact that boost is the huge killer to everyones HG but...



Here you are saying that it is a different cause.


You mostly sound like a parrot with no real technical knowlege. Ill LMAO to that.

Originally Posted by Dude_57

I'm lost I don't know that much about all this yet it's definately rocket science to me! Haha anyway didn't mean to start nothing between anyone my bad =/ but anyway it doesn't seem to be getting worse it's just stuck at not startin the best it could and as far as all the engine work goes I guess I'll do all o it? To be safe?? Lol what do y'all think? It will take some time for me get it all done but about does hoe much each upgrade cost? Besides the turbo I'm pretty sure that's the most expensive one haha thank you!! All this has been really helpful so far