Cylinder No. 7 Disaster
05-17-2009, 06:31 PM
#1
TECH Regular
Thread Starter
iTrader: (18)
Join Date: Mar 2004
Posts: 401
Likes: 0
Received 0 Likes
on
0 Posts
Cylinder No. 7 Disaster First run at track after FAST install and this is what happened. It's really hard to see it but the cylinder wall is also split. Unbelievable. How does this happen?
Here's some more pics. The only thing I see with the head is a couple of nicks on one of the valves from the pieces of broken piston bouncing around in the chamber. Also, the two small pieces of piston were found inside the intake. How the hell did that happen?
Here's some more pics. The only thing I see with the head is a couple of nicks on one of the valves from the pieces of broken piston bouncing around in the chamber. Also, the two small pieces of piston were found inside the intake. How the hell did that happen?
05-17-2009, 06:40 PM
#3
TECH Fanatic
iTrader: (1)
Join Date: Nov 2007
Location: NJ
Posts: 1,193
Likes: 0
Received 0 Likes
on
0 Posts
Id have to say went lean/bad gas/ to much timing/ engine had some knocking and bam done.
Im running close to 16 psi of boost on stock piston but but im **** with my tune and A/f ratio
Im running close to 16 psi of boost on stock piston but but im **** with my tune and A/f ratio
05-17-2009, 08:14 PM
#5
Teching In
Join Date: Feb 2009
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Did you clean the chamber and piston to inspect it? or this was the way it look when you opened it?
If this was the way it looked when opened, it looks like a lean condition.
How did the plug looked? Maybe the injector went out.
If this was the way it looked when opened, it looks like a lean condition.
How did the plug looked? Maybe the injector went out.
Trending Topics
05-19-2009, 01:29 PM
#9
Usually those pistons do that because of ring butting due to high pressure/temperature in the cylinder. I know that #7 cylinder has distribution issues with the factory intake but you said you are running the fast intake. Did you check the injector o-ring on that cyl? You may have had a vacuum leak on that hole. Oddly enough I have a piston on the bench next to me that looks identical to yours. It was caused by a clogged injector.
05-19-2009, 03:18 PM
#10
TECH Regular
Thread Starter
iTrader: (18)
Join Date: Mar 2004
Posts: 401
Likes: 0
Received 0 Likes
on
0 Posts
Usually those pistons do that because of ring butting due to high pressure/temperature in the cylinder. I know that #7 cylinder has distribution issues with the factory intake but you said you are running the fast intake. Did you check the injector o-ring on that cyl? You may have had a vacuum leak on that hole. Oddly enough I have a piston on the bench next to me that looks identical to yours. It was caused by a clogged injector.
05-20-2009, 02:53 PM
#13
Bad tune would have likely gotten more than 1 cyl.
"Distribution problems"?
Looks to be a topic in this thread:
https://ls1tech.com/forums/generatio...inder-7-a.html
"Distribution problems"?
Looks to be a topic in this thread:
https://ls1tech.com/forums/generatio...inder-7-a.html
Last edited by Old Geezer; 05-20-2009 at 03:04 PM.
05-20-2009, 03:27 PM
#15
i think he's saying it could have run rich or it could have run lean?
i'm thinking cooling issues (coolant lines) have something to do with the #7 or at least contribute to.
on a side note: my level 6 brute (bobdoless) savagely RAPED your level 12. you couldn't even take my dog out.
i'm thinking cooling issues (coolant lines) have something to do with the #7 or at least contribute to.
on a side note: my level 6 brute (bobdoless) savagely RAPED your level 12. you couldn't even take my dog out.
05-21-2009, 01:30 AM
#16
05-21-2009, 12:34 PM
#17
Bad tune would have likely gotten more than 1 cyl.
"Distribution problems"?
Looks to be a topic in this thread:
https://ls1tech.com/forums/generatio...inder-7-a.html
"Distribution problems"?
Looks to be a topic in this thread:
https://ls1tech.com/forums/generatio...inder-7-a.html
