Fitting? Fitting isn't the issue, dude. You can fit plenty of cams. But you won't be getting all the cam has to offer if you don't bump your compression by milling the heads.

 

yeah but how much power are you talking about?

 

Well, according to TEA and LG Motorsports, up to 25hp. I'd say 10-15. That was 2 different phone calls on different days just asking what I was leaving out by not flycutting. After doing it last week, man it's so STUPID to not take the few minutes to get that extra hp, not to mention even better is the crispness, torque, and overall driveability.

 

Flycutting can also decrease the life of your piston. The edge of the cut on the piston can run much hotter than the rest and cause detonation.

 

Is this something that you've actually seen proof of? Because I've only heard theories on this and nothing more. And we know the value of internet theories when it comes down to it. Help me out, man. Tell me what you've actually heard of happening other than "it maybe might could" if you don't care. You sound like you know what you're talking about. Although I wonder if you're aware that after flycutting and running a piece of sandpaper on the edge, it's no sharper than any aftermarket piston with valve reliefs.

 

K but I was planning on sparying and in the n2o forum I read post like these all the time. I would like to know as well?

 

Ahh I dunno about the N2O. Probably better ask it there.

 

Yes there is a member on my forum that lost #5 and #7 because of the flycutting that he did. It is obvious from the pictures they were the cause of detonation. The tune also played a role but the lfycutting helped the demise. So its not like if you flycut then you detonate. The conditions have to right and with flycutting they are more likely. This is the only case that I have seen but never really searched for it elsewhere.

Didnt know about the sandpaper trick. I can see how it would work. As far as after market pistons with vavle reliefs, I just thaught they did it somehow differently and the pistons were designed from the beginning to accomodate the vavle reliefs.

 

Well, we're talking about edges and not thickness. So if you look, I think the sharp edges are sharper on aftermarket pistons than on my flycut ones. But mind you, I only went .070". That's just a nick in the piston. How deep did he measure and cut? I'd like to know just for the sake of education. But I honestly can't see how he could do it with a good tune.

 

http://ls1gto.com/forums/showthread.php?t=30088

Heres one of the links. The tune played a role in the detonation. But that goes towards any setup, a good tune is key. You may need to fatten it up just a hair to keep the rear left cylinders safe with the flycutting. But Im not expert, Im sure your tuner will know better than me.

 

No, I appreciate your input. We studied the #7 cylinder theory on it getting more air. Well, we held a compressor hose up to my intake manifold when it was off the car. THe vast majority of the air cam through the #7 runner. Thanks for the help man. Easy enough.

 

So if the manifold is not the problem, why is it that #7 is the one that mostly fails?

 

No, we're saying the manifold IS the problem. Since most of the air gets fed there, it goes lean, so you gotta get your tune right.

 

Oh ok I see it. Im an idiot.

Back on topic I should be getting my cam and heads in next weekend and hopefully a tune shortly after. Ill start a new thread with a video pics and results.

 

Going to pick up the cam in lubbock on wed. I CAN'T WAIT........... Oh yeah the clutch is shot so that will be the next item up.


Now should I get 60lbs injectors or should I get 42lbs injectors the price difference is so small that I think I should just go with the 60lbs run them at a lower duty cycle and not have to worrry about for the future mods.

 

You dont think the stock will be able to handle the cam swap? What about head and cam like Im doing? I was inder the ompression that stock injectors were good up to 500RWHP.

 

I've always see that 400rwhp is about the limit to stock injectors. I know on my old setup (heads, 224 cam, headers, etc. making 401rwhp and 385ft/lbs) my stockers were at 95% on a 95 degree day. Meaning that I'd be WAY over on a cold day.

 

i have 42 pounders.. you should be fine with that.

if you are going heads and cam.. i HOPE your getting bigger injectors!

 

You need bigger injectors! I am maxing out mine and I have not installed headers yet. That is next on my list after the ingectors for winter mods.

 

Any sharp edges in the CC can get hot and lead to pre-ignition. Be sure to smooth out the edges when you flycut.