Eagletanggreen >>>> I Blew my Motor Today!!<<<<
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Joined: May 2005
Posts: 3,307
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From: Fayetteville, NC
Originally Posted by Jay'Z
Damn that plenum looks weak...... Hey please change the thread title.. It freaked me out.. 
Pay your PM dues!
The plenum is part of the motor!
Originally Posted by Billhyco
daaaaaaaaaaaaaaaaaamn, wasn't there a plenum that looked similiar to this at ZdayZ last year????
damn .. sorry about the plenum...but damn you got a strong motor!!! I would gladly take a blown plenum and F@#Ked hood anyday over a blown motor!!!
so i guess the best options are new Cosworth or OEM w/spacer as far as plenums go!!??
so i guess the best options are new Cosworth or OEM w/spacer as far as plenums go!!??
Last edited by IslandZavage; Mar 9, 2008 at 08:47 PM.
Originally Posted by IslandZavage
so i guess the best options are new Cosworth or OEM w/spacer as far as plenums go!!??
I can only imagine what my kinetix v+ would have looked like, lol.
D@mn! We were just talking about this stuff and I popped on and found this thread. Lame but I think even I'm glad it wasn't anything internal 
Glad to see somebody shooting for 10s! GL
Glad to see somebody shooting for 10s! GL
Originally Posted by Hal@IP
. I had the same thing happen to my maxima's intake manifold when I had a nitrous backfire - .
I guess you learn something everyday..
I thought Luie said he didn't spray, so it wasn't a N20 backfire.
If I'm not mistaken the Injected 9 sec. car runs a Cosworth plenum and their at 1000+whp. I guess the Cosworth will work for Luie as well.
If I'm not mistaken the Injected 9 sec. car runs a Cosworth plenum and their at 1000+whp. I guess the Cosworth will work for Luie as well.
Glad to hear your motor is ok Luie - phew!
If he wasn't spraying N20, who can theorize what happened (why a backfire occurred) when Luie let off the gas? By the impact impressions on the hood, I don't think any plenum could have survived. Having a stronger "top" may simply have resulted in more lower end damage...
Luie, was there any evidence of the explosion on the lower plenum?
And Luie, were you running pure methanol or a 50/50 methanol water mix?
Sounds like you were at the top of 1st (high rpms) with a high duration cam, intake valve still open and had a quick injector cut during the middle of a burn that travelled back through the intake valve, igniting the methanol in the manifold. Just a theory of course, but I suspect, this would've just been a "pop" had methanol not been a part of the equation...
To attempt to prevent this from happening again, I would think it would be safer if the methanol injection is tied to fuel injection directly so when one quits, so does the other. I know one of the aquamist kits does this (the expensive one!).
If he wasn't spraying N20, who can theorize what happened (why a backfire occurred) when Luie let off the gas? By the impact impressions on the hood, I don't think any plenum could have survived. Having a stronger "top" may simply have resulted in more lower end damage...
Luie, was there any evidence of the explosion on the lower plenum?
And Luie, were you running pure methanol or a 50/50 methanol water mix?
Sounds like you were at the top of 1st (high rpms) with a high duration cam, intake valve still open and had a quick injector cut during the middle of a burn that travelled back through the intake valve, igniting the methanol in the manifold. Just a theory of course, but I suspect, this would've just been a "pop" had methanol not been a part of the equation...
To attempt to prevent this from happening again, I would think it would be safer if the methanol injection is tied to fuel injection directly so when one quits, so does the other. I know one of the aquamist kits does this (the expensive one!).
Last edited by rcdash; Mar 10, 2008 at 04:31 AM.
Thread Starter
Joined: May 2005
Posts: 3,307
Likes: 0
From: Fayetteville, NC
Originally Posted by rcdash
Glad to hear your motor is ok Luie - phew!
If he wasn't spraying N20, who can theorize what happened (why a backfire occurred) when Luie let off the gas? By the impact impressions on the hood, I don't think any plenum could have survived. Having a stronger "top" may simply have resulted in more lower end damage...
Luie, was there any evidence of the explosion on the lower plenum?
And Luie, were you running pure methanol or a 50/50 methanol water mix?
Sounds like you were at the top of 1st (high rpms) with a high duration cam, intake valve still open and had a quick injector cut during the middle of a burn that travelled back through the intake valve, igniting the methanol in the manifold. Just a theory of course, but I suspect, this would've just been a "pop" had methanol not been a part of the equation...
To attempt to prevent this from happening again, I would think it would be safer if the methanol injection is tied to fuel injection directly so when one quits, so does the other. I know one of the aquamist kits does this (the expensive one!).
If he wasn't spraying N20, who can theorize what happened (why a backfire occurred) when Luie let off the gas? By the impact impressions on the hood, I don't think any plenum could have survived. Having a stronger "top" may simply have resulted in more lower end damage...
Luie, was there any evidence of the explosion on the lower plenum?
And Luie, were you running pure methanol or a 50/50 methanol water mix?
Sounds like you were at the top of 1st (high rpms) with a high duration cam, intake valve still open and had a quick injector cut during the middle of a burn that travelled back through the intake valve, igniting the methanol in the manifold. Just a theory of course, but I suspect, this would've just been a "pop" had methanol not been a part of the equation...
To attempt to prevent this from happening again, I would think it would be safer if the methanol injection is tied to fuel injection directly so when one quits, so does the other. I know one of the aquamist kits does this (the expensive one!).
Bingo!
This is what Jkenefic thinks what happen. I replayed what happen in my head.
On the top of first it started to hop so I let off and back on quickly to try to get her from jumping, on the instance I tried to lay on the gas she was still jumping and she hit the rev limiter, POP, and with the meth in there = blown plenum. We need to figure out a way to make the meth if possible a bit safer. I am getting two bolts from Lowes and triple checking everything and then taking the plenum off and waiting for the little Cosworth to show up.
Luie
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Joined: Jan 2006
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From: nj
Originally Posted by eagletanggreen
Bingo!
This is what Jkenefic thinks what happen. I replayed what happen in my head.
On the top of first it started to hop so I let off and back on quickly to try to get her from jumping, on the instance I tried to lay on the gas she was still jumping and she hit the rev limiter, POP, and with the meth in there = blown plenum. We need to figure out a way to make the meth if possible a bit safer. I am getting two bolts from Lowes and triple checking everything and then taking the plenum off and waiting for the little Cosworth to show up.
Luie
This is what Jkenefic thinks what happen. I replayed what happen in my head.
On the top of first it started to hop so I let off and back on quickly to try to get her from jumping, on the instance I tried to lay on the gas she was still jumping and she hit the rev limiter, POP, and with the meth in there = blown plenum. We need to figure out a way to make the meth if possible a bit safer. I am getting two bolts from Lowes and triple checking everything and then taking the plenum off and waiting for the little Cosworth to show up.
Luie
