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Old 06-22-2001, 02:57 PM   #1
NateDogg
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Default how much NOS can a 2.5 handle

i wanna knw how big of a shot i can put on it
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Old 06-22-2001, 03:11 PM   #2
SubaDan
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I have the 50 shot but the 60 or 70 shot will work. Just make sure you have colder plugs. I have no other engine work done. All Stock. 50 shot has a nice kick to it trust me.

Dan
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Old 06-22-2001, 03:25 PM   #3
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I've been thinking about upgraded 11.5:1 pistons and a cleaned up bottom end. I can still add a healthy dose of nitrous on top of the better pistons. Ya think 125-150 might work on a a built motor (pistons, cams, stock rods, expensive (sorta) nitrous setup)? Wondering out loud.... G
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Old 06-22-2001, 03:39 PM   #4
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My 50 shot will be installed this weekend, woo hoo!! I still have great pricing on the NOS brand kit until the end of the month as well $450 shipped.

I would imagine that you could potentially run any size shot you want, as long as the bottom end can handle it. You'd also need to make sure you're getting enough fuel so you don't run lean. Make sure to close the block too, 100+ HP shot will create gobs of cylendar pressure. You should upgrade the cooling system too, nitrous oxide = mucho hot motor.

Anything is possible ... speed costs money, how fast do you wanna spend?
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Old 06-23-2001, 12:21 AM   #5
Kevin Thomas
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Lightbulb How much Nos?

Since I no longer have a turbo kit, I am using Nos only. I ran my car at Atco Raceway this past Tuesday on a 60 shot of Nitrous (Dry manifold, kit #5122). My car was averaging around 18.4 in the 1/4 mile and the 60 shot took it to a best time of 15.3. I've ran the 70 shot with the turbo so I imagine I can do it with just the Nitrous on an N/A motor.

BTW: The 15.3 1/4 mile run was done on pee-water 89 octane gas and stock spark plugs. No kaboom! Just think.....if a 60 shot of Nitrous can take my autotranny 2.2ltr wagon down 3 seconds, your 2.5ltr manual tranny should be able to at least knock 3 seconds off also. Can you say 12-13 second 1/4 mile time? Just theorizing!

Last edited by Kevin Thomas; 06-23-2001 at 12:23 AM.
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Old 06-23-2001, 02:44 AM   #6
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But is "putting the sqeeze on" Safe? or Reliable?
Trust me, I wanna run NOS!
but everyone I know tells me NO,
its bad,
you could blow up your engine,
it cuts down the engine life,
mess up the car blah blah blah?


Can anyone give me a definitive enough testimonial to get me to finally run and buy a kit?
I sure hope so, 16.53 Intake and Exhaust at LACR.....speed is looking DAMN EXPENSIVE from where I'm sitting.

If nobody can stand up for "Wheezing Da Jooce", then anyone got 10G I can have?
consider it an investment in upcoming drag talent? comeon I won $100 for a perfect .500 R/T the other night im worth it!!!!
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Old 06-23-2001, 04:49 AM   #7
Kevin Thomas
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Quote:
Originally posted by DoomEquation
But is "putting the sqeeze on" Safe? or Reliable?
Trust me, I wanna run NOS!
but everyone I know tells me NO,
its bad,
you could blow up your engine,
it cuts down the engine life,
mess up the car blah blah blah?

Can anyone give me a definitive enough testimonial to get me to finally run and buy a kit?
I don't understand what you are asking. Why aren't you listening to what all of those people said? If you want a testomonial, well here it goes. I've been using a 60 shot of Nitrous on my turbocharged OBS for just over 40k miles and my engine did not blow up. I am STILL using Nos and my engine runs fine, even with 106K miles on the odometer and an automatic tranny.

Is this testomonial enough for you to purchase the kit? If not, than I would stay as far away from Nitrous as possible if I were you.
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Old 06-23-2001, 11:03 AM   #8
2yLiTe
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Hi Kevin,

What internal work have you had done to your car?

I know a lot of guys are on the fence about NOS, and with the recent release of FATF (those guys were NOS happy), I can see NOS sales going up. But I think what most people want to know is, what prepatory work needs to be done before installing?

Thanks man!

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Old 06-23-2001, 11:31 AM   #9
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Kevin is the NOS King of Tri-State!!!
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Old 06-23-2001, 12:34 PM   #10
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Cool

IIRC Kevin has all stock engine internals but a beefed up tranny.
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Old 06-23-2001, 01:17 PM   #11
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what kind of prep work is involved with installing a nitrous system? also i done a search and came up with a bunch of posts saying i can melt a piston if all the nitrous gets sucked into one, can this happen? i'm thinking about nitrous too. and no i did not see the fast and the furious if anyone was wondering.
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Old 06-23-2001, 01:50 PM   #12
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F&F wasn't THAT bad of a movie . I remembered something the other day that might be worth mentioning. Does anyone here have any experience with high temp pistons coatings. I checked into some of it last night. There were oodles of coatings available for motorsport applications. I've kept them in the back of my mind since I started thinking of a beefed N/A build. Those coatings can reduce friction and improve heat transfer. That means you can run higher cylinder pressures, but I'm not sure how much higher . Teflon and molybdenum are the two I've heard the most about, along with cryo+heat treating. More money on a silver platter for your impreza, sir ? G
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Old 06-23-2001, 07:55 PM   #13
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Kevin,

First off the ? after blah was a typeo.
I was just asking if all the bad stuff they say about nitrous is the same like it is with turbos, mostly bad hype.
I'm probably going to get a 50 shot in the near future. Thanks mostly to this thread and hearing that people like you have done it without any problems. Plus I didnt want a big shot anyway just something to tide me over until I get a turbo.
Mostly i was asking if a 30-50 shot would have any immediate BAD affects or any real HIGH risk of serious engine failure.

Another question,
Wouls the pistons that I can buy for nitrous be idael for turbo later? could they carry over? So if i were to say, buy cobb turbo pistons and conrods would that help keep the motor safe from the nitrous as well as not posing problems with a turbo in the future?

If not what bottom end modifications would you reccomend that are low cost (within reason, speed is the same as spend as was said) and effective in helping to protect the motor from any problems that MAY occur with a mild dose of nitrous?
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Old 06-23-2001, 07:59 PM   #14
geoffj
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Where do you fill up Nitrous Bottles when they run out? Do you have to go to a Racing Shop or can you find it other places?
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Old 06-23-2001, 08:35 PM   #15
imprezadan
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Nitrous is starting to sound better and better. It's not on all the time like a turbo, therefore you're less likely to eat 2nd gear.
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Old 06-23-2001, 09:05 PM   #16
Rich L
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Refering to NOS:
Quote:
It's not on all the time like a turbo, therefore you're less likely to eat 2nd gear
Turbo are not "on" all the time, and to imply that it less risky to use NOS... instead of turbo boost... to save your tranny... is misleading.

That "risk" to the tranny is directly related to the increase in power output of the motor....
no matter if its turbo, NOS, or SC.

Lets all not forget NOS is illegal for street use... and in most states... just for having the bottle connected in your car can land you introuble with the police. Also, to be in an accident with a full bottle can make a bad situation alot worse.

With that said...
Kev. T have proven that with the right tuning, a NOS kit can make your car very very fast. Bottom line, one must wieght the risks as well as the benifits, and see if NOS is the right choice for them.
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Old 06-23-2001, 10:26 PM   #17
HamFist
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I had considered nitrous partially because of what I've seen and heard from turbo owners. Total power output will indeed determine what happens to the tranny. But, hearing that an N/A build can spin it's tires just as easily as a turbo can, was pretty encouraging. My main focus is still N/A, but using n2o for that extra boost was still appealing. The most I've heard of being used on a stock Imp was a 100 shot. It held together fine for over a year, and that was up to the present time I heard about it. It ran a 14.0 close to sea level, with not even a pulley, header, ecu, etc... It still sounds veeeerrrryyy promising. G
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Old 06-24-2001, 12:23 AM   #18
Kevin Thomas
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Default Nitrous and you!

Quote:
Originally posted by burninrubber
My main focus is still N/A, but using n2o for that extra boost was still appealing. The most I've heard of being used on a stock Imp was a 100 shot. It held together fine for over a year, and that was up to the present time I heard about it. It ran a 14.0 close to sea level, with not even a pulley, header, ecu, etc... It still sounds veeeerrrryyy promising. G
Wow! That's awesome! I don't recall anyone here using that big of a shot. I think that person could've been well into the 13's if they engaged the Nos right off the line.

I just got back from doing a bad, bad thing. I'll just say I managed to beat a stock Eclipse, some supped up truck and almost beat an 'M' powered BMW 318i hatchback (or is that ti?). He got me way in 3rd gear before the street ended. Then I immediately rushed to my inlaws house to load the car full of laundry to take my wife and son home on cheapo 89 octane gas.

Folks, the only way you are going to learn is by taking chances sometimes. I don't recommend Nitrous, turbo or any other means of forced induction but with all the hoopla on this board and these fascinating numbers people are getting in the 1/4 mile, it's beyond tempting.

If you get Nitrous, please be sure you have an EGT gauge, an air/fuel ratio gauge and a means to control your fuel. Even with my fuel pressure increased by the Nitrous setup, it still runs leaner (with less power) than when I add a bit of fuel. Just these 3 things will take you a long way in preserving your engine. Your tranny is another story. Good luck!
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Old 06-24-2001, 10:10 AM   #19
SubaDan
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Quote:
Originally posted by Rich L
Refering to NOS:

Turbo are not "on" all the time, and to imply that it less risky to use NOS... instead of turbo boost... to save your tranny... is misleading.

That "risk" to the tranny is directly related to the increase in power output of the motor....
no matter if its turbo, NOS, or SC.

Lets all not forget NOS is illegal for street use... and in most states... just for having the bottle connected in your car can land you introuble with the police. Also, to be in an accident with a full bottle can make a bad situation alot worse.

With that said...
Kev. T have proven that with the right tuning, a NOS kit can make your car very very fast. Bottom line, one must wieght the risks as well as the benifits, and see if NOS is the right choice for them.
Take a look at the Q & A section on the Holley website on nitrous Holley . Nitrous is legal in 50 states. Also N2O is not flammable. That can also be found in that section. the only boom you can get from the bottle is if it ruptures, that would take a lot of twisting metal. Also It got to hot. That might be a problem. As long as the bottle doesn't heat up to around 400 to 500 degrease you should be fine. Of course don't go around telling cops that you have NOS. I mean NOS doesn equal speed, and speeding is illegal.

Last edited by SubaDan; 06-24-2001 at 10:14 AM.
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Old 06-24-2001, 01:07 PM   #20
Hondaslayer
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Hey if you plan on nos (doh!!!) don't forget that you will need to run with premium fuel.
P.S please forgive me for saying nos.I just saw fatf last night and it is stuck in my head nos nos nos nos nos!
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Old 06-24-2001, 01:20 PM   #21
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hmmm
ok lets seee..
nos is not flamable
its basically 2 parts nitrogen and 1 part oxygen..
as wel all know oxygen can burn
and it will when the n20 turn to gas
the nitrogen seperates which also has a coolign affect
and the fact that u can get pulled over
yes its true
but what fudging cop will say hey u have nos open ur trunk
and its only illegal if armed
if it is off it wontbe illegal
and it will also explode because of the pressure...
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Old 06-24-2001, 09:27 PM   #22
Rich L
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SubaDan,
NOS is considered a hazmat, you can get a big fine for taking a tankful through a tunnel. Although it might be legal to use at the track, it is NOT legal for street use. (off road use only)

NOS is not flamable, but I doubt you want a tankfull in your car during an accident. Even if the tank doesnt explode, any rupture or leak will discharge the gas into the car. In case you dont know, nitrous oxide if inhaled can impair judgement and funtion (both of which are important in an event of an accident). One can literally asphyxiate becuase of a lack of O2 to breath.
One of the I-clubs members had a friend that was killed in an auto accident, his NOS tank exploded due to fire.

Im only trying to give the facts. Hopefully ppl will at least consider the risks before spending their money.
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Old 06-24-2001, 10:13 PM   #23
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why do you need to run with premium gas?
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Old 06-24-2001, 10:57 PM   #24
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I personally know of people here in Michigan who have been ticketed for illegal transporation of a hazardous material. I don't know the outcome of the events, what the fines were or if they had to be paid. I just know they were hasseled and ticketed. Then again, I know of dozens more people running it who have had no problems whatsoever. With all that being said, a 50 or so shot would still be my first choice as a real(cheap) go fast goodie
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Old 06-25-2001, 12:31 AM   #25
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Well, I've done just a bit more homework the last few days. (I can really afford the nitrous kit just about any time...it's just a question of when that urge is going to strike.) I can keep it if I decide to go turbo anyway. (Any further reading will result in talk of a weekend runner, running 100 octane gas everywhere, with high compression, cams, ecu,etc.) 2k into the motor (2-6 months), and I've got a built n/a beast with an extra surprise. 250-270 is a modest estimate from a semi streetable n/a 2.5. 100 horse per litre should be entirely possible. Cylinder pressures and the strength of your parts is what it boils down to.

Call it a fantasy, but I'm dreaming of a 2 stage 125 fogger in top of 11.5:1 pistons, cams, ecu, headers, no cats, extra injectors, race gas, and mild headwork. The whole thing has to be programmable, with a purge valve, bottle warmer, etc. From the reading lately, it says that port injection systems are more prone to sticking fuel or nitrous valves. One stuck valve and boom. A plate might be safer, but it's possible to suck all of the nitrous down one cylinder. Since this system will ONLY be used for the track, regular maintenance wouldn't be a problem. I'm wondering if 4 extra injectors is overkill for nos. Too many injecting things on that intake is going to make it awfully crowded . It's still a double edged sword...the secondary injectors have also been said to improve driveability on n/a 4 cylinder rally cars. Can the tec2 handle all that? The wolf3d can according to BSpec.

It's entirely too late and way past my bedtime now . I'm going to go to work like a good little drone so I can feed my obsession G
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