i FU$%%EN give up
- Thread starter liv4gnz
- Start date
Hows this for a senerio. Alky being ignited in the intake-boom. A backfire (for whatever reason) igniting the spraying alky-then of course kaboom.
As far as a damaged piston, depending on the damage could be many things of course. If you buy into the alky explosion idea, then you could easily associate the cause of the piston damage with the backfire (lean?, works with your lean plug description).
Sorry for the loss, I just installed a new engine myself along with many other thousands of dollars of stuff. Just waiting for something to happen.
As far as a damaged piston, depending on the damage could be many things of course. If you buy into the alky explosion idea, then you could easily associate the cause of the piston damage with the backfire (lean?, works with your lean plug description).
Sorry for the loss, I just installed a new engine myself along with many other thousands of dollars of stuff. Just waiting for something to happen.
Pronto
Believe nothing you hear and half of what you see.
- Joined
- Dec 9, 2002
The only way for you be sure is to pull the heads and look to see if you did damage. Other things could have been hurt as well. Bottom line is you found the weakest link by pushing your luck too soon. I would helicoil the intake manifold too. Hope you find the cause.
bmackinnon
Active Member
- Joined
- Feb 24, 2005
Those numbers are the BLM/INT's, and numbers greater than 128 mean the ecm has detected a lean condition and is richening (adding fuel) to compensate.... which would indicate that you actually leaned it down, rather than 'bumped it up'.... AND... those numbers are in a table, based on load and rpm, not just a single number, so a bl=128 at idle means (tells you) absolutely nothing about the tune at anything other than idle.
It would seem, that you got a backfire due to either a lean condition (lean pop), or an ignition breakdown trying to run 25 psi... and if a piston is burnt, that would point to a massive lean pop...
Scanmaster at dinosaur data rate combined with the factory narrow band O2 sensor is way inadequate to try and safely jump up to 25 psi, IMO... like the other poster said..... it would take me 'AWHILE' to get to 25 psi with those tools only..... you need a powerlogger (or DirectScan for us poor folks :redface: ), a GOOD understanding of how to interpret the data, and a slow, careful, methodic approach to avoid problems like this.....
That said, hopefully the damage is relatively minor.... and you can just replace the piston(s), button it back up, and proceed with a more cautious approach.... :wink:
bmackinnon
Active Member
- Joined
- Feb 24, 2005
and your point is???? (not being a smartazz...:smile: )
BlackBandit
God loves Buicks!
- Joined
- Mar 29, 2003
Eric makes a couple of the blm cells user adjustable to control WOT fuel. Basically instead of the cell being used to store long term fuel correction the user can manually move the number up or down to change WOT fuel.
bmackinnon
Active Member
- Joined
- Feb 24, 2005
AAHHHH.... :smile: I gotcha' - makes sense.... I wasn't aware that's how the TT fueling adjustments display on the scantool.... see?? learn something new every day!! and I really WASN'T trying to be a smarta$$... :smile:
I don't think a break in issue caused this at all. I'm one of the ones that back it out of the drive way then give it it hell. This year's refresh got a few street miles on it then right to the track. But, I make sure everything is 110% before I turn it up. I data log everything....a 15 psi pass...18 psi pass....20psi pass....etc...making sure that the engine is always getting plenty of fuel.
The melted piston imo is a tuning issue for sure. It leaned out bad. Intake blew off probably due to a horrible backfire. Maybe the alchy pump failed or the tune was way off?? May not have had enough octane for that much boost?? How much timing?
The melted piston imo is a tuning issue for sure. It leaned out bad. Intake blew off probably due to a horrible backfire. Maybe the alchy pump failed or the tune was way off?? May not have had enough octane for that much boost?? How much timing?
BlackBandit
God loves Buicks!
- Joined
- Mar 29, 2003
That sounds like a nail being hit on the head.
Has a melted piston even been verified? Sounds to me like the OP just assumed and now has found a blown head gasket.
Well IMO there are a few contributing factors. Engine not being broken in, and lean condition, I have burnt up a piston that was not broken in correctly after beating on it (engine had less then 150 miles), rebuilt motor and broke parts in correctly and with same tune 15,000 mile and plenty of beatings, still runs great.
DailyDrifter
The Slow and the Curious
- Joined
- Dec 5, 2007
The problem is.........1. Brand new motor 
2. Not tuned 3. 25lbs and Alky 4. Blown headgasket and intake manifold (possible piston?) . You blew your load too fast, you gotta take it easy with these cars.
2. Not tuned 3. 25lbs and Alky 4. Blown headgasket and intake manifold (possible piston?) . You blew your load too fast, you gotta take it easy with these cars. 
Phoneguy
Cometic HG stress tester
- Joined
- Aug 27, 2002
I did one just as bad in 07. I hung it on the wall in the garage as a reminder to keep an eye on the tune and the fuel.
Bryan
In one of your first post. " How to tune"
I referenced the Turbo Regal web site for info for you to learn. You explained to me that those where just numbers
and do not mean anything. I have stayed out of any and all of your threads since. But i feel I must speak now.
If you spent $500 or 10k on your motor. Broke it in slow or fast. None of it will matter if you refuse to learn how to tune it properly. You can buy scan masters/ powerloggers/
gauges everything. But if you do not know what they are telling you it is all worthless.
Sorry for your loss.
PS. Who won the pool.......... .
I referenced the Turbo Regal web site for info for you to learn. You explained to me that those where just numbers
and do not mean anything. I have stayed out of any and all of your threads since. But i feel I must speak now.
If you spent $500 or 10k on your motor. Broke it in slow or fast. None of it will matter if you refuse to learn how to tune it properly. You can buy scan masters/ powerloggers/
gauges everything. But if you do not know what they are telling you it is all worthless.
Sorry for your loss.
PS. Who won the pool..........
.
- Joined
- Dec 7, 2002
In one of your first post. " How to tune"
I referenced the Turbo Regal web site for info for you to learn. You explained to me that those where just numbers
and do not mean anything. I have stayed out of any and all of your threads since. But i feel I must speak now.
If you spent $500 or 10k on your motor. Broke it in slow or fast. None of it will matter if you refuse to learn how to tune it properly. You can buy scan masters/ powerloggers/
gauges everything. But if you do not know what they are telling you it is all worthless.
Sorry for your loss.
PS. Who won the pool..........
I think this was my 3rd or 4th post in the origional thread...
Have someone help you... if you keep running qurter mile blasts your gonna be picking up pieces and quick.
