Nitrous damage?
I have been running a dry 75 shot in my 94 LS for 7 years, [autocross] without any problems.
I am beginning to think the bad oil ring was the problem here, probably contributing to a lean burn situation in the one cylinder, possible carbon build-up on the valve may have caused a "hot spot".
Valves can take a lot of "abuse" as long as it is uniform, a hot spot would blow chunks off a valve. 94
I am beginning to think the bad oil ring was the problem here, probably contributing to a lean burn situation in the one cylinder, possible carbon build-up on the valve may have caused a "hot spot".
Valves can take a lot of "abuse" as long as it is uniform, a hot spot would blow chunks off a valve. 94
Sr420Det Think what you want, like I said 7 summers of auto cross [Solo 2] spraying most of the time, [WOT] and no problems, i know at least 3 others running the Zex system with a dry 75 shot, also without problems, I pull plugs after every pass to check the burn, [perfect color] so don't tell me I am full of ****, I know it works, I have the 94 with over 200,000 on it to prove it.
Anytime you want to show up and put your car where your mouth is, I will be more then happy to take it from you, you can even come along for the ride so you know I am spraying. 94
The zex system (I believe) comes with a lil purple box that will automatically jack ur fuel pressure up via the fpr when u start spraying. Thats how ur getting the extra fuel needed to make power with nitrous instead of burning up ur valves. You said earlier it was just a fpr and 75 shot, without that box ud b running either pig rich off of nitrous or burnin valves on nitrous if the fuel pressure was stock. So next time u say that let people know u have a "smart box" that adjust the fuel pressure when the fts is activated. If u dont have that box then all my earlier statements still stick true. When u give me half the truth sometimes i just have to assume ur full of **** and I dont want other people thinkin they can do what u stated earlier cause they will **** their motor up.
The zex system (I believe) comes with a lil purple box that will automatically jack ur fuel pressure up via the fpr when u start spraying. Thats how ur getting the extra fuel needed to make power with nitrous instead of burning up ur valves. You said earlier it was just a fpr and 75 shot, without that box ud b running either pig rich off of nitrous or burnin valves on nitrous if the fuel pressure was stock. So next time u say that let people know u have a "smart box" that adjust the fuel pressure when the fts is activated. If u dont have that box then all my earlier statements still stick true. When u give me half the truth sometimes i just have to assume ur full of **** and I dont want other people thinkin they can do what u stated earlier cause they will **** their motor up.
Calm down man. No need to get so serious, cuss and bash someone. i understand you don't want other people to make a mistake, but you don't have to bash someone to figure out what they are doing either. jmo
sorry dude didnt realize u were so sensative, wasnt really bashing and I always cuss. Just preachin the truth and the dude should know how his stinkin nitrous system works before he tells others how theres work, i mean come on wtf? Then he says to bring my car so he can take it hahaha. you should be critizing him, im helping and he's hindering
sorry dude didnt realize u were so sensative, wasnt really bashing and I always cuss. Just preachin the truth and the dude should know how his stinkin nitrous system works before he tells others how theres work, i mean come on wtf? Then he says to bring my car so he can take it hahaha. you should be critizing him, im helping and he's hindering
and i'm not critisizing him because he hasn't really been rude. it's all good though.
I dont have a problem with professional racers not knowing how there motors work as long as they r not online telling other people how there **** works. Thats when id call em out. U should b critizing him cause he is wrong, thats whats wrong with america nowadays. No ones callin anyone out when they know there wrong. I mean think about all the **** thats gone on in the past ten years, and when everyone looks back they always say, "well i knew they were wrong" but they didnt do **** about it.
So hows the rebuild comin? r u going to just replace the valve?
So hows the rebuild comin? r u going to just replace the valve?
I dont have a problem with professional racers not knowing how there motors work as long as they r not online telling other people how there **** works. Thats when id call em out. U should b critizing him cause he is wrong, thats whats wrong with america nowadays. No ones callin anyone out when they know there wrong. I mean think about all the **** thats gone on in the past ten years, and when everyone looks back they always say, "well i knew they were wrong" but they didnt do **** about it.
So hows the rebuild comin? r u going to just replace the valve?
So hows the rebuild comin? r u going to just replace the valve?
a good friend of mine is the manager of the local speed shop. his brother owns a machine shop, so i talked to him and he said to call his brother and let him know he told me to call him. well i did, told me he would pull all the valves and re ceet them for 50 bucks labor. i was happy to hear that, i'm going to talk to him about oversized valves, some port work and better valve springs. the cams will have to wait and be there own thing later down the road when i can afford them. i can't really do it all at once but at least the head would be ready for the cams to be bolted on.
The zex system (I believe) comes with a lil purple box that will automatically jack ur fuel pressure up via the fpr when u start spraying. Thats how ur getting the extra fuel needed to make power with nitrous instead of burning up ur valves. You said earlier it was just a fpr and 75 shot, without that box ud b running either pig rich off of nitrous or burnin valves on nitrous if the fuel pressure was stock. So next time u say that let people know u have a "smart box" that adjust the fuel pressure when the fts is activated. If u dont have that box then all my earlier statements still stick true. When u give me half the truth sometimes i just have to assume ur full of **** and I dont want other people thinkin they can do what u stated earlier cause they will **** their motor up.
It does not change the fact that I run a dry 75 shot, no bigger injectors, no second injectors, no ECU programing for longer pulse, no fuel spray nozzle, by definition a DRY system.
Like I said, put your car where your mouth is, I will be more then happy to show you I can spray a dry 75 shot without burning valves. 94
dude ur so full of ****, shut the **** up. Id blow ur piece of **** out the water with a number of my builds. U never said anything about turning up ur fpr before u autocrossed. I asked u that question right after ur first post. All u said was u adjusted timing before u autocrossed but it was a secret and u couldnt tell the compition hahahahahaha ur such a ****in loser. Any one that pays a tuner to tune a stock motor with a 75 shot is a ****in idiot, now **** off. My car shares nothing with my mouth, its not like im tellin u ur car is slow. Im tellin u, u dont know what the **** ur talking about so keep ur uneducated commets out of tech threads.
So what r u gonna do about ur rings on that cylinder? 190 isnt to bad but if def is more than 5-10% off from the others. How new is ur head? All they r going to do is lap ur valves and call it a day. If i were u Id just find another valve for stupid cheap (i got one Il send u just for shipping, like 3 bucks if not free) and replace the broken one. Once you get the cams, thats when Id do all the head work and head for a tune. Do you have anything to tune with? u got a wideband? that would b super valuable to u just to know what the air/fuel ratios were so this dont happen again.
So what r u gonna do about ur rings on that cylinder? 190 isnt to bad but if def is more than 5-10% off from the others. How new is ur head? All they r going to do is lap ur valves and call it a day. If i were u Id just find another valve for stupid cheap (i got one Il send u just for shipping, like 3 bucks if not free) and replace the broken one. Once you get the cams, thats when Id do all the head work and head for a tune. Do you have anything to tune with? u got a wideband? that would b super valuable to u just to know what the air/fuel ratios were so this dont happen again.
Last edited by Sr420Det; Aug 20, 2010 at 11:38 AM.
dude ur so full of ****, shut the **** up. Id blow ur piece of **** out the water with a number of my builds. U never said anything about turning up ur fpr before u autocrossed. I asked u that question right after ur first post. All u said was u adjusted timing before u autocrossed but it was a secret and u couldnt tell the compition hahahahahaha ur such a ****in loser. Any one that pays a tuner to tune a stock motor with a 75 shot is a ****in idiot, now **** off.
So what r u gonna do about ur rings on that cylinder? 190 isnt to bad but if def is more than 5-10% off from the others. How new is ur head? All they r going to do is lap ur valves and call it a day. If i were u Id just find another valve for stupid cheap (i got one Il send u just for shipping, like 3 bucks if not free) and replace the broken one. Once you get the cams, thats when Id do all the head work and head for a tune. Do you have anything to tune with? u got a wideband? that would b super valuable to u just to know what the air/fuel ratios were so this dont happen again.
So what r u gonna do about ur rings on that cylinder? 190 isnt to bad but if def is more than 5-10% off from the others. How new is ur head? All they r going to do is lap ur valves and call it a day. If i were u Id just find another valve for stupid cheap (i got one Il send u just for shipping, like 3 bucks if not free) and replace the broken one. Once you get the cams, thats when Id do all the head work and head for a tune. Do you have anything to tune with? u got a wideband? that would b super valuable to u just to know what the air/fuel ratios were so this dont happen again.
nah i don't have a wideband. if that one valve is all that's wrong, i'm just going to have him resurface the head and replace it. if there are more bad i will prob. going with higher compression valve springs and over sized valves.
i don't have anything to tune with and judging from the other cylinders it looks like the jets are where they should be.
"edit" i already ordered a top end gasket set and another ring set.
All ur other valves look good, the only time i burnt a valve, it was like a pin hole through it but that caused it not to hold compression. I guess for 50 bucks that would b worth the agrivation of just changein one valve without the proper tools, plus ur getting all that other work done too. Sounds like a decent deal to me.
Just remeber that our manifolds are not meant to mix fuel...just air. So anytime ur running a wet kit there is a chance of more fuel getting in one cylinder than the other. Could u post a pic of ur fogger nozzle hooked up, im curious to c how u got it.
Just remeber that our manifolds are not meant to mix fuel...just air. So anytime ur running a wet kit there is a chance of more fuel getting in one cylinder than the other. Could u post a pic of ur fogger nozzle hooked up, im curious to c how u got it.
All ur other valves look good, the only time i burnt a valve, it was like a pin hole through it but that caused it not to hold compression. I guess for 50 bucks that would b worth the agrivation of just changein one valve without the proper tools, plus ur getting all that other work done too. Sounds like a decent deal to me.
Just remeber that our manifolds are not meant to mix fuel...just air. So anytime ur running a wet kit there is a chance of more fuel getting in one cylinder than the other. Could u post a pic of ur fogger nozzle hooked up, im curious to c how u got it.
Just remeber that our manifolds are not meant to mix fuel...just air. So anytime ur running a wet kit there is a chance of more fuel getting in one cylinder than the other. Could u post a pic of ur fogger nozzle hooked up, im curious to c how u got it.
i'm running a skunk2 intake manifold, dunno how much of a difference that makes.


if these aren't good enough let me know and i'll take more just tell me exactly what you wanna see.
I want to c where the nozzle fits into the intake track. I can barely c it under ur strut bar. It should b 6-8 inches from ur thottle opening, from what i c urs looks a little to close. U got it facing the right way, right? Flat side faces the im. I c now how ur intake bends pretty much like 6 inches from the throttle opening, maybe u should get a intake that goes straight out for a lil longer than what u got
Im not sure if the sk2 would help or hinder fuel distribution, maybe u should give them a call and ask. Iv always used factory intakes with my nitrous setup so i really dont know.
oh and i respect people that keep there engine bay clean. Good ****
Im not sure if the sk2 would help or hinder fuel distribution, maybe u should give them a call and ask. Iv always used factory intakes with my nitrous setup so i really dont know.
oh and i respect people that keep there engine bay clean. Good ****
Last edited by Sr420Det; Aug 20, 2010 at 12:27 PM.
dude ur so full of ****, shut the **** up. Id blow ur piece of **** out the water with a number of my builds. U never said anything about turning up ur fpr before u autocrossed. I asked u that question right after ur first post. All u said was u adjusted timing before u autocrossed but it was a secret and u couldnt tell the compition hahahahahaha ur such a ****in loser. Any one that pays a tuner to tune a stock motor with a 75 shot is a ****in idiot, now **** off. My car shares nothing with my mouth, its not like im tellin u ur car is slow. Im tellin u, u dont know what the **** ur talking about so keep ur uneducated commets out of tech threads.
I didn't want to get into a name calling contest, but you truly are an *******.
First off, I never said I wanted to race any of your "builds", what I said was...
"put your car where your mouth is", you say you can not have a 75 shot dry system because it will burn the valves, I say your wrong and I can prove it, don't try and make it sound like I said I would race one of your cars, talk about bullshit and half truths.
Second, last time I checked the FPR regulates fuel pressure, not how much fuel is injected into the cylinder, that would be the ECU/ECM adjusting the pulse width of the injector using info from sensors like the MAS or MAP, TPS, ECTS, 02 sensor and so on to calculate the amount of fuel needed, the FPR only insures there is enough pressure to supply the demand.
Your not dumb enough, [maybe you are] to think that all the gas, [hydrocarbon] is actually burnt during combustion, do you even know why/how nitrous oxide works, I'm guessing not.
Before you do anything else, go back to school and lean how to spell you "uneducated" fart, or maybe your kid sister can show you how the spell check on your computer works, it's comments not "commets" and competition not "compition" you ignorant *******.
Who tunes an engine before a race, [even a stock engine with a 75 shot] anyone who wants to get the most out of the engine and prevent damage to that engine, in other words, anyone smarter then a stick or you for that matter.
BTW I do not pay for my tune, my "tuner" is my boss, owner of Dave Ward Auto Electric an ignition system and fuel injection system expert, you can only wish he would tune one of your "builds".
Last thing, you need to learn to respect your elders, I was racing cars when you where still just your dads wet dream, so I am pretty sure I do know a few things about how engines work, so until you get out of grade 5, STFU, nuff said. 94
u dummy, higher fuel pressure equals more fuel per injector cycle. I know ur not tuning, cause u dont have anything to tune with. fpr and changing the static timing wont get u far haha. thats sad u work at a fuel injection specialty place.....dude u belong in america!
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