Nitrous backfire ?'s

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Jul 24, 2010 | 10:19 PM

1baaadz28

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From: Gadsden AL

Nitrous backfire ?'s

OK, i got an 02 m6 with a nos plate kit, runnin 150 shot wet. plugs were tr6's, A/F was 12.8 , bottle pressure was 1100, sprayed fine in 2nd and 3rd and as soon as i hit it in 4th it detonated, any help would be appreciated!

Jul 24, 2010 | 10:23 PM

custm2500

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Not enough info.

How was the tune both timing and A/F ratio. What rpm did you drop to when you hit 4th? Gonna take a good deal of info for anyone to know what possibly happened. You have pics?

Jul 24, 2010 | 10:48 PM

1baaadz28

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From: Gadsden AL

5 degrees out, hit it at 3200 on a WOT switch, the whole back of the ls6 intake is gone and major cracking all around the intake, no damage to the block, will post pics tomorrow

Jul 25, 2010 | 12:36 AM

ATVracr

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From: GB

My friends brothers cousin sprays 300 on TR6's I dont know what could have happened.

Jul 25, 2010 | 03:23 AM

camscam02

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Quote:

Originally Posted by ATVracr

My friends brothers cousin sprays 300 on TR6's I dont know what could have happened.

Hahaha my great cousin did the same. Weird

Jul 25, 2010 | 06:48 AM

jman54002

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classic^^^^...does anyone read about plugs before they spray?? it seem half the carnage on nitrous motors could be avoided.

Sorry to here about the damage.

Jul 25, 2010 | 09:33 AM

SargeZ06

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Shouldn't he be using a 7 or 8 range plug for a 150 shot?

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Jul 25, 2010 | 10:46 AM

1baaadz28

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From: Gadsden AL

Yes its a stock bottom end running on 93 octane, on stock pump and injectors

Last edited by 1baaadz28; Jul 25, 2010 at 11:07 AM. Reason: additional info

Jul 25, 2010 | 11:34 AM

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Firehawk441

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Looking further then the broken intake would be beneficial...
Detonation breaks rings, etc...

Jul 25, 2010 | 12:24 PM

#11

1baaadz28

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From: Gadsden AL

motor is comletely apart and nothing noticable,the internals look great. is it possible that i lost the pump and it leaned out?

Jul 25, 2010 | 12:34 PM

#12

BOTTLEFEDLS1Z

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From: STL

Quote:

Originally Posted by 1baaadz28

motor is comletely apart and nothing noticable,the internals look great. is it possible that i lost the pump and it leaned out?

Yes it is possible to lose the fuel pump and go lean, but you'd have more then a intake problem. Piston(s) would be fucked with no fuel and all that heat inside the cylinder

Jul 25, 2010 | 12:42 PM

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1baaadz28

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From: Gadsden AL

ok im using a zex NMU and could it have not shut off between shifts and had nitrous puddle up in the intake?

Jul 25, 2010 | 01:04 PM

#14

Firehawk441

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Quote:

Originally Posted by 1baaadz28

is it possible that i lost the pump and it leaned out?

You said internals are ok.
Did you melt any ground straps on your plugs?

Jul 25, 2010 | 04:23 PM

#15

1baaadz28

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From: Gadsden AL

no Its really weird, nothing melted and the plugs look fine, im thinkin of scapping the whole motor and just doing a wicked 383 and no spray.

Jul 25, 2010 | 05:21 PM

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BLK02WS6

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From: on the dyno tuning in MD

That's what happens when you don't use a window switch... you drug the motor down too far on the shift. A WOT switch alone is not enough on a 6 speed...

Jul 25, 2010 | 06:29 PM

#17

custm2500

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Quote:

Originally Posted by BLK02WS6

That's what happens when you don't use a window switch... you drug the motor down too far on the shift. A WOT switch alone is not enough on a 6 speed...

This was my guess.

Also still no pictures yet!