its crazy...30k miles on mine and number 1 and 4 did the same thing

 

gosh dammit. these cars are having a lot of problems lately

 

we have 93
filled up on it last night.
its weird to think a stock tune would cause it, but knock could do that.
i dont run the stock tune at all, but i hope i don't have this issue in the future

 

Welcome to the club of failed rings. You managed to get 25k more miles on yours then mine.

 

Gotta pay to play

When you start pouring more boost into any motor, the chances of failure go up..

 

yea us houston guys got 93 octane. and scott you should datalog on the stock tune to see if you have knock. i know you drive hrs and hrs on ur car so i didn't see how this could all happen. but glad you got it all fix and back up to date.

 

Oh, so some areas of Texas have 93 octane instead of just 91 octane. That is good.

 

I rarely EVER see 91. 93 is the most prominent from my experience. 91 might be more common in west texas, thats one of the few places I haven't been.

 

A few things to keep in mind. Never go WOT at low RPM. Especially in 5th. Use the best gas you can find. And if you can hear or feel your car knock, it's time for a leakdown/comp test.

Stay stock or go GMS1 if you want your warranty. Intakes are the worst offenders of throwing off tuning, IMO.

Warren

 

This guy is funny...

 

i would agree too

 

When you have a stock car that blows up, I think that shouldn't matter.... Sounds like a dumbfuck designed these motors.

 

yeah, i think #3 cylinder def has a problem

 

This car was tuned...

 

The floor is raised to clear the DI injector. Then the short turn radius is more like an instant turn. This is the reason for the poor flow of the intake side on the LNF head.

I beat the crap out of mine regularly without issue. I think this was an isolated incident, or at least somewhat rare.

 

i had the same problem with mine and got it fixed under warrenty but know it sounds like a subaru but it runs strong so idk

 

I dunno. Sounds to me like more of an isolated incident, but I'm not too sure. I've got 22k miles on mine and the Trifecta tune holds at 28lbs in 4th and 5th at WoT. We'd need much more response from other Tuned cars to see what they say about how their cars have been.

I've had my idiot light come on once or twice, but always stayed solid for a bit, which could be a number of things, before it went out a few miles down the road. And just at idle too.

 

I've knocked the ever loving **** out of my car a few times, and its still truckin. Sometimes things break, and whatcha gunna do. I agree with the other guys, #3 looks like it has issues too.

Saved all of those pictures though, neat to see inside the motor. Out of curiousity do you have any pictures of the conrods?

 

Coming from someone that has seen a lot of these...It is a classic overboost engine failure. You have exceeded the pressure capability of the rings.

Sometimes it is a combination of overboost with preignition. Still over pressure of the rings.

 

Beat the crap out of it ?? Damn dude , thought I was the only one , the bitch runs strong no matter what I do to it, **** back after I bought HPT only person I could find for a tuner was Stevo only had enough cash for him to throw a quick canned tune on it . I ran that bitch into the dirt with a stevo tune knocking to beat hell untill I got my mods, I ran that bitch on a 900 + mile trip alternating octanes 91 to 93 to 91 racing g8 gxp's mustangs and **** the whole way in 90 degree weather . I ran stevos tune with a **** ton of knock for atleast 11k and this ****** still won't break , I am just that way sometimes I try to break it , call me crazy but its just my nature. Most drivetrains would scream in pain and agony of my treacherous abuse..

 

i had the same issue... Its not rare by anymeans...

 

This post most definitely should be stickied or at least make another thread with the pictures to be stickied.

 

i'm starting to think i might be in the same boat as this guy here.. but i think i'll drive it as long as i can and then bore over to the next size, wiseco pistons and then get some valve springs too.

 

How much is to much boost?

 

You are pushing the limits of the pistons and rings in the 27 - 28 psi. Also the spark curve you have input can be a big factor as well as the rpm in which you start the boost. The LNF engine really does not "like" boost at rpm's below 2500.