Nirous Backfire HELP NEEDED..........Serios replies please
Thread Starter
Staging Lane
Joined: Apr 2007
Posts: 90
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From: usa..and La Ceiba Honduras
Nirous Backfire HELP NEEDED..........Serios replies please I used a fogger system ( 175 rwhp ) shot coming full on in 2nd gear ( A4 )
As soon as i hit 3rd, the 100 dry shot came on for less than 1/2 a second and BOOM !!! The Vararam intake, coupler and everthing blew off splitting in 1/2 some of it. #7 and #8 plugs were melted off. Also, the other plugs were bright orange.
WHY ?
Why would the dry cause this ? OR was it the combination ?
BTW... I lost the race too !! My C5 vs 72 Chevelle Pro Street w/ B/B chevy and 350 shot...
As soon as i hit 3rd, the 100 dry shot came on for less than 1/2 a second and BOOM !!! The Vararam intake, coupler and everthing blew off splitting in 1/2 some of it. #7 and #8 plugs were melted off. Also, the other plugs were bright orange.
WHY ?
Why would the dry cause this ? OR was it the combination ?
BTW... I lost the race too !! My C5 vs 72 Chevelle Pro Street w/ B/B chevy and 350 shot...
Well...seeing as you don't have any idea how this happened, I'm going to go ahead and assume that the car is NOT tuned for that much spray. What plugs were you running? What fuel injectors? What fuel pump? Octane? Timing? Have a fuel pressure gauge or safety switch? Where's the fuel for the wet kit coming from? Standalone w/ race gas?
Originally Posted by 123sugey
No timing pulled. The 175 shot was fine. I was running another setup for years 125 wet shot w/ 100 dry shot w/ 0 problems
For 275rwhp of spray, you should be running at least another stage cooler in plugs, and gapped a bit tighter maybe even. What kind of power are you making N/A? 28# injectors sound small.
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Simple answer, high rpm backfire. You ran lean, why: could be a couple things, injectors, fuel pump, dry getting past MAF with out reading, hit limiter and pcm pulled fuel. You really need to take progressive steps, then you know everything is in order. The plugs are telling ya another story, to much timing and not cold enough. Your lucky with that gas in the intake track, check the Have ya had a backfire thread, some of the wet bacfires are not pretty. I had one also due to hitting limiter (full story in other thread), a high rpm lean backfire, same stuff on mine: Vararam filter melted down, MAF maybe bad, TB jumped the gearing, split the plastic coupler ahead of the bellows.
Robert
Robert
Thread Starter
Staging Lane
Joined: Apr 2007
Posts: 90
Likes: 0
From: usa..and La Ceiba Honduras
The same backfire as mine. I didnt hit the rev limiter this time. That was last month when i wiped out my heads.
What would cause bright orange plugs ? Lean ? i never looked at plugs that were as bright as an orange.
No more spraying the 100 dry shot til i get a tune, BAP installed, colder plugs and fuel injectors !!
What would cause bright orange plugs ? Lean ? i never looked at plugs that were as bright as an orange.
No more spraying the 100 dry shot til i get a tune, BAP installed, colder plugs and fuel injectors !!
Originally Posted by 123sugey
The same backfire as mine. I didnt hit the rev limiter this time. That was last month when i wiped out my heads.
What would cause bright orange plugs ? Lean ? i never looked at plugs that were as bright as an orange.
No more spraying the 100 dry shot til i get a tune, BAP installed, colder plugs and fuel injectors !!
What would cause bright orange plugs ? Lean ? i never looked at plugs that were as bright as an orange.
No more spraying the 100 dry shot til i get a tune, BAP installed, colder plugs and fuel injectors !!
Bright orange, hmmmm, where's Cat when you need a plug Guru.
On the added bottle pressure, well this will do one thing for sure, lean your wet hit out, then with an allready starting leaner than normal wet hit, you had one of the above additional problems and thus a higher rpm lean backfire, imo.
Robert
yeah...your gonna have to rethink EVERYTHING. You left basically every base completely uncovered.
Youll need to:
*retard timing..some on the 175 shot and more on the 275 total
*add octane, minimum of 100 octane. Dont bother with additives
*minimum of heat range 7 plugs gapped to .028-.030
*add a 255 lph INTANK pump. Your stock one is likley not up to the task
* get tuned on a dyno or on the street with a wideband and scan tool. Youll need to tune the 175 shot first and get it squared away. Then you will likley need another tune for the dual stage. If the nitrous is coming out of the same bottle for both stages this will affect overall Af ratio. if your 11.5 on the first stage wet...youll likley be richer as you add the dry...MAYBE. Youll need to run the dry seperately with a wideband to ensure it is registering properly.
*I personally would be using a window switch or controller for both stages.
Good luck...but you have some work to do before your succesfull.
Youll need to:
*retard timing..some on the 175 shot and more on the 275 total
*add octane, minimum of 100 octane. Dont bother with additives
*minimum of heat range 7 plugs gapped to .028-.030
*add a 255 lph INTANK pump. Your stock one is likley not up to the task
* get tuned on a dyno or on the street with a wideband and scan tool. Youll need to tune the 175 shot first and get it squared away. Then you will likley need another tune for the dual stage. If the nitrous is coming out of the same bottle for both stages this will affect overall Af ratio. if your 11.5 on the first stage wet...youll likley be richer as you add the dry...MAYBE. Youll need to run the dry seperately with a wideband to ensure it is registering properly.
*I personally would be using a window switch or controller for both stages.
Good luck...but you have some work to do before your succesfull.
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I think you need to educate yourself a bit better about nitrous setups before trying to spray again. Especially going that high. It seems like you left out a LOT of fine details on your setup that couldve prevented the backfire.