Nitrous Oxide - Post your stories/results from Detonating/Pre-Igniting on a big shot!




WizeAss
11-18-2007, 01:50 AM
After reading Dave's post about the 28 degrees of timing and fuel pump with stock rods on a 300 shot detonating and bending the rod, I became curious..... what kind of damage have yall seen on big shots of nitrous with detonation or pre-igniting the cylinder?

I assume the list will include:

Lifted Heads
Broken Ringlands
Bent Valves
Burnt plugs
Backfires??
Lost compression

What happened to you?


TwoFast4Lv
11-18-2007, 02:36 AM
Never detonated but got a little Lean ;)
Melted number 8 plug down. Rejetted number eight and made a dozen or so more passes. I thought I was lifting a head gasket because it would push coolant out durring each run. I ran 10.oh and dyno'd over 600RWHP like this :devil:


http://i7.photobucket.com/albums/y294/picsaplenty/OUCH/07Sept04023.jpg
http://i7.photobucket.com/albums/y294/picsaplenty/OUCH/07Sept04024.jpg
http://i7.photobucket.com/albums/y294/picsaplenty/OUCH/07Sept04025.jpg

I got a feeling compression was down on number eight :devil:

WizeAss
11-18-2007, 08:02 AM
:nod:Never detonated but got a little Lean ;)
Melted number 8 plug down. Rejetted number eight and made a dozen or so more passes. I thought I was lifting a head gasket because it would push coolant out durring each run. I ran 10.oh and dyno'd over 600RWHP like this :devil:


I got a feeling compression was down on number eight :devil:


that is a good start... thanks for the contribution!


Robert56
11-18-2007, 08:57 AM
Never detonated but got a little Lean ;)
Melted number 8 plug down. Rejetted number eight and made a dozen or so more passes. I thought I was lifting a head gasket because it would push coolant out durring each run. I ran 10.oh and dyno'd over 600RWHP like this :devil:


http://i7.photobucket.com/albums/y294/picsaplenty/OUCH/07Sept04023.jpg
http://i7.photobucket.com/albums/y294/picsaplenty/OUCH/07Sept04024.jpg
http://i7.photobucket.com/albums/y294/picsaplenty/OUCH/07Sept04025.jpg

I got a feeling compression was down on number eight :devil:

Ellis, looks like a little detonation to me; the piston tops look sand blasted a tell tale sign? Or is this just the pic?
Robert

BAKED
11-18-2007, 09:03 AM
I melted 6 of my plugs and burned 2 valves when I got greedy with the timing on a 200 shot. The porcilin came off the tip of one of the plugs and got chewed up between the head and piston.

TwoFast4Lv
11-18-2007, 09:44 AM
Ellis, looks like a little detonation to me; the piston tops look sand blasted a tell tale sign? Or is this just the pic?
Robert

Nope it is just the flash on the pic's. My $100 E-bay shop camera LOL.

The pistons looked great once we cleaned them up. HOPEFULLY this will clean up the high end miss I was getting. I have yet to put it through the last 200ft on juice with out breaking up. At one point we were down to 10* and below 10 ARF

i was SO glad I took the NGKs out and went to the Autolite racing plugs!

jetblast
11-19-2007, 01:43 AM
Nope it is just the flash on the pic's. My $100 E-bay shop camera LOL.

The pistons looked great once we cleaned them up. HOPEFULLY this will clean up the high end miss I was getting. I have yet to put it through the last 200ft on juice with out breaking up. At one point we were down to 10* and below 10 ARF

i was SO glad I took the NGKs out and went to the Autolite racing plugs!
what size shot wher you spraying and what oct were you on?

DopdBrd
11-19-2007, 09:14 AM
Never had any experience with detonating/pre-ignition but I had a backfire once that blue a flame out of the corner of my hood, fried my MAF, and blew apart my CAI.

TwoFast4Lv
11-19-2007, 09:37 AM
what size shot wher you spraying and what oct were you on?

We were running 104UL and spraying through a .082 N2O jet ;)

jetblast
11-19-2007, 11:21 AM
We were running 104UL and spraying through a .082 N2O jet ;)

thanks man!

LostCauseZ06
11-19-2007, 12:14 PM
melted a few dozen plugs getting greedy on nitrous and not reflashing my nitrous tunes. i have a ground strap off number 3 permanently embedded in my piston to remind me not to be an idiot :jest:

Nitro Dave's Nitrous Outlet
11-19-2007, 10:19 PM
I was trying to make it to thunder a few years back and got in a hurry with my car. I had a bad voltage to the injectors and on a 400 shot it was not pretty. I busted the block,took out number 6 and 8 piston and hurt the head. I felt like crying.

TwoFast4Lv
11-20-2007, 01:42 AM
That reminds me I need to drop a set of '9s' back in for the dyno this weekend.

Robert better be ready to go over 700RWHP. . I will be :devil:

Robert56
11-20-2007, 09:06 PM
That reminds me I need to drop a set of '9s' back in for the dyno this weekend.

Robert better be ready to go over 700RWHP. . I will be :devil:
Hehe, more than ready. I'll blow that mofo up if I have to, lol. :confused:
Robert

Sweet71
11-20-2007, 10:35 PM
Fuel pump shit the bed, was a really quick end of the season install, no fpss and this was the result...

http://i129.photobucket.com/albums/p228/jordanlouis/JordansCamera067.jpg

http://i129.photobucket.com/albums/p228/jordanlouis/JordansCamera058.jpg

Sweet71
11-20-2007, 10:42 PM
A few more...


http://i129.photobucket.com/albums/p228/jordanlouis/JordansCamera054.jpg

http://i129.photobucket.com/albums/p228/jordanlouis/JordansCamera055.jpg
http://i129.photobucket.com/albums/p228/jordanlouis/JordansCamera062.jpg

WizeAss
11-21-2007, 12:50 AM
damn.... you win. that is some major carnage! :D

white2001s10
11-21-2007, 10:08 AM
fill in those holes with some JB-weld, & some of those piston rings can be straightened back out. :nod:

Sweet71
11-21-2007, 10:53 AM
hahah The heads were salvageable that was about it

Ray@Nitrous Outlet
11-21-2007, 11:40 AM
some light reading...

http://www.yellowbullet.com/forum/showthread.php?t=3151

WizeAss
11-21-2007, 12:11 PM
some light reading...

http://www.yellowbullet.com/forum/showthread.php?t=3151

seeing that first might save alot of us some damage...... that was nasty!

amazing what damage nitrous can cause!

Todd157k
11-21-2007, 01:11 PM
do a search on "horror stories". There was a thread not too long ago that had some horrid ugly pics. I think Robert's melt down was in there too. I'll see if I can find it.