imola740i

i had a nitrous backfire with a nozzle setup sprayin 150hp. i made several high ten sec passes and played on the street for several months with this set up before it blew the back of the intake out on the street. i thought maybe fuel puddled causing this so i sold off the whole kit and went with a plate kit from daves, and also changed the plugs. still not sure what made it backfire but i did have a bad o2 that wasnt throwing a code. found that out just playing around with a new code reader i got that has a graph. hoping that was the culprit due to running lean on bank 2. now the car occasionally throws 0300 random missfire code. never seen this code before and i keep the code reader hooked up all the time. it has allways surged a little at low cruising rpm's but it never really misses and revs flawlessly to 6800. im guessing the code is due to the new spark plug design -br7ef. i had the old tr6's gapped at .035 as well. double checked the wire connections. so in essence all i changed was the plugs and the distance between maf and tb due to plate. my fear is another nitrous backfire due to a real missfire. im ready to spray and retune but dont want to blow the intake again. any input from you veterans would be greatly appreciated. ls1/ls6 heads/ls6 intake(brand freakin new)tr 224/fulllengths.

DubbleTruble

can you go into a little more detail on the big day. when i blew up. How many time did you spray, how close to each other. What rpm was it set to spray on, Stock heat range on plugs? bottle heater and gauge or no. so on.

NoTractionLS1

I agree we need more info!

imola740i

i was taking a friend for a ride and sprayed it twice for about three sec. like ive done a hundred times without problem. then pop a sec in to the fourth time. tr6 at .035,always 900-1000 bottle psi. 3500 rpm. wot. it had been surging a bit more than usual due to the o2 sensor i guess??????? it ran alot smoother after i changed it. i feel that along with the poss. fuel puddling was the cause but dont want to overlook anything. any ideas on why it popped and why i get the 0300 now?

06blackGTO

iTrader: (20)

I don't know why it popped, but I do know that tr6's are a no no on a 150shot. Im running br7fe... atleast I think that's how you spell it, but I heard that's the one you want to run with that big of a shot.

Chris@NitroDaves

When you were spraying your first setup did you ever verify what the AFR was??

LS1PUNK

iTrader: (5)

Are u auto or stick? I had the same thing happen to me not to long ago aswell; fixed the intake, replaced the plugs, made a couple of test runs and all was good.

06blackGTO, do u have any experience with TR6's or did u hear that they are a no-no as well?

jeepers_88

iTrader: (13)

I think the plugs have more to do with the rest of his setup. Im bone stock apart from a lid, full exhaust and frost mail order tune. I have tr6's and have put close to 20 bottles through my car in the last year all on 150 jets through a harris plate, I havent had a single problem.

ATVracr

iTrader: (5)

Doesnt mean its right because it hasnt blown up.

TR6 is a projected tip plug, not a good choice for nitrous use.

Do a search for projected vs. nonprojected plugs.

https://ls1tech.com/forums/nitrous-o...ted-plugs.html

READ THIS ........
https://ls1tech.com/forums/nitrous-o...ight=projected

DubbleTruble

very good point ATV,

06blackGTO

iTrader: (20)

Iv'e never run tr6 plugs. Im new to the nitrous scene, it's just I did some research, and alot of experienced people said that with a 150shot. tr6's are not the way to go.

NoTractionLS1

NGK BR6EF stock number 3177. Just like what ATV said!

imola740i

well ive been sprayin the sh it out of it and it freakin flys now!! props to the plate frome daves. it hits hard as **** and no problems thus far. i even stepped up to 200 hp pills and it is in low 10 sec territory. no traction till 100mph on street tires. i think the plugs is why it backfired as well but not sure. i do know im going to the track this weekend to break some ****!!! thanke for the responses and thank you daves nitro outlet.

LS1PUNK

iTrader: (5)

Are u on the stock rearend or drive shaft?

jeepers_88

iTrader: (13)

sorry ATV, that came out kind of wrong, I wasnt trying to say they were right, Ive seen all the threads on the projected vs. non-projected. I only went with the tr6's because at the time when I put my setup together (about a year and a half ago), thats what everyone seemed to praise. now everyone says to go with the 7's. next time I get around to taking plugs out, Ill probably be switching over to those.

imola740i

custom shaft. stock rear with upgraded axles and rear end support cover. broke axle once and then ring gear once before. next failure im goin 12 bolt or 9 inch. been very lucky. several 1.49 short times. i think its because my car is 2950lb.