There, Bob, You can send me my $8,000 endorsement fee we talked about.:biggrin:
I'll get right on that. I believe we agreed on a dollar a year....
Bob
And boom goes the dynamite. 2nd motor down
- Thread starter Onalky87
- Start date
I'll get right on that. I believe we agreed on a dollar a year....
Bob
Eric Stage I
TurboTweak Guy
- Joined
- May 25, 2001
None of my alky chips have a fuel cut limiter. If it was a street chip, then it's still in there.
Eric
Eric
Lean out after running WOT for 20sec in cool air without knowing the a/f.
That is good to know.
Posy up a close pic of the head gasket, I want to see it.
Does it appear the gasket was about to blow or blown?
I am curious if hte piston was machined out and was real thin in the
center.
We have all melted motors making way more power and i still have never seen one burn a hole in it before it torched hte block/head or the side of a piston.
Was really surprised to see a hole like that.
Got em, it was definetly lifting, i still cant believe the piston had a hole before it burnt the gasket.
How does number 3 look? does the piston show any signs of detonation?
Eric,
I could swear my old 5.4 Alky chip would stutter at 6200. haven't had a chance to "test" the new chip yet. So, I don't have any rev limiter at all?
Eric Stage I
TurboTweak Guy
- Joined
- May 25, 2001
The old 5.4's were set to 6375. For 5.5 and newer, there is no limiter on alky chips.
Regards,
Eric
- Joined
- May 28, 2001
What do the pistons w/o holes look like on the underside??
ROCHILLIN^V6
New Member
- Joined
- Apr 8, 2010
Good to know!Here's what happened.................
You hit the rev limiter with alcohol. NEVER use a rev limiter in a chip if you use alcohol. EVER!!!! The ECM rev limiter shuts the fuel off, but not the alcohol. So at rev limit, the alcohol is the only fuel entering the engine and it WILL melt alot of parts. Have your chip burned with no rev limiter function or you will melt your engine down again. With a forged rotating assembly you can twist it to 7500 no problem so no need for a rev limiter at all. Use a Bob Bailey two step for your rev limiter function, as it shuts the spark off, not the fuel. Bailey Engineering 2-Step Support Page His box would have saved your engine. Best next buy for you.:smile:
Sorry to hear about your loss. Been there done that with many engines over the last few years. Just lost a StageII 274" engine due to fueling issues with a hose popping off inside the tank. 10.03 @ 134 with only 50 psi fuel pressure is a problem.
I've seen a broken block due to rev limiter and alcohol before. If you only burned a piston consider yourself lucky.
turbofabricator
Well-Known Member
- Joined
- Mar 7, 2004
Burning a hole in a piston is a SURE sign of pre-ignition, not detonation, though the two end up hand in hand. As Chuck asked, what do the underside of the pistons look like. Is there any bluing? If there is bluing, then it was making power. Too much bluing and it's gonna drop out. What is the piston crown thickness? I have seen alot of "turbo" pistons that had too much crown thickness machined out for compression reduction, AND the use of a Chevy forging as a blank will usually result in thin spots due to wrong valve relief placement. Post a picture or two of the underside of the piston and the other ones. What does the upper rod bearing shell look like on the noted cylinder?
What is the piston crown thickness? I have seen alot of "turbo" pistons that had too much crown thickness machined out for compression reduction, AND the use of a Chevy forging as a blank will usually result in thin spots due to wrong valve relief placement. Post a picture or two of the underside of the piston and the other ones. What does the upper rod bearing shell look like on the noted cylinder?It shows signs of detonation/preignitionBurning a hole in a piston is a SURE sign of pre-ignition, not detonation, though the two end up hand in hand. As Chuck asked, what do the underside of the pistons look like. Is there any bluing? If there is bluing, then it was making power. Too much bluing and it's gonna drop out.
Turbo6Smackdown
Well-Known Member
- Joined
- Dec 31, 2005
I'm still lost.... Over revved? Tach? Shift light? It's an automatic..... It shifts itself.....
