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kamarofreek 03-15-2013 09:10 PM

nitrous problem
hi i have 383 camaro built right all forged msd 850 holley with nos plate system 175 shot.I have msd activation switch turns nos on at 4000 rpm and off at 7000 rpm the problem im having is shooting flames out of pipe actually caught carpet on fire inside car.I thinks its worse at end of quarter mile the exhaust is a y pipe into single 3.5 inch pipe but has a dump before sigle pipe.Ouls this happen because of y pipe design?Im also wondering if my switch is faulty and nos isnt turning off.The fuel system is electyric holley black pump any advice greatly appreciated car is automatic if it matters thanks in advance

FmrStrtracer 03-15-2013 10:30 PM

Flames out the exhaust indicate a overly rich mixture with unburned gas being ignited in the exhaust.

Nitrous by itself will not burn/ignite. Maybe your fuel solonoid is open and the nitrous solonoid isnt, causing an excess for fuel.

kamarofreek 03-15-2013 11:51 PM

both solenoids are new if nos solenoid wasnt working i wouldnt be feeling the nitrouswould i?

33Willys77 03-16-2013 05:01 AM

Have you run it without nitrous? Was the motor tuned without nitrous? What do the plugs look like after 1 run ---- Need a fresh set of plugs, do a run and read them. Do you have an O2 sensor?

kamarofreek 03-16-2013 07:24 PM

yes it was ran withjout nos.
no o2 sensor
never had a chance to read plugs

kamarofreek 03-16-2013 07:25 PM

was tuned before nos and retarded after nos

33Willys77 03-16-2013 10:04 PM

What did your plugs look like without N2O? Does your floor get that hot that it starts the carpet on fire? That would be turning the metal red to do that. How do you know there are flames? 175HP N2O is not a big bunch, so you should not be seeing anything different out the pipe - however you are seeing it. ??

FmrStrtracer 03-17-2013 04:27 PM


Originally Posted by kamarofreek (Post 1657212)
both solenoids are new if nos solenoid wasnt working i wouldnt be feeling the nitrouswould i?

Just becasue they are new doesnt mean they are working correctly.

1Gary 03-18-2013 10:58 AM

A local friend of mine works at Delco and machined his own nitrous system for his 442 455.Outrageous fast car.He was pouring in more nitrous then anyone I know.He was tearing out the main saddles out of the block and twisting the cranks.Broke afew too.But he knows his Old's and was way in front of the tune.Never any flames.............Huge back bumper wheelstands.

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