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Old 10-24-2000, 02:51 PM   #1
Syms
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Member#: 1252
Join Date: Apr 2000
Location: Vancouver West Side
Vehicle:
2000 2.5 RS sedan
Alpine white

Post Needed: some educated (or non) opinions about NOS

I just picked up a ZEX kit from my friend..he's used it for about 2 months?? and has gone through maybe 3 bottles MAX in the last two months..so the kit is not too old and not too used...I got a really good deal on it..so I decided to buy it...

Anyways...I plan on stickin with just a 55 Shot..and to the most...65 shot...and I was just wondering if NOS really does affect the engine in really bad ways...especially the DRY SYSTEM that Zex is...

I know that Wet system is better than a Dry...and I thought about that already...I only plan on using the NOS very rarly...I would prob go through 1 bottle every 3+ months...reason being because I don't want to royaly screw up the engine...that and the 60bux to refill each time is a real heartache...haha..

anyways...Opinions would be greatly apreciated...

as well..if there are people who know a lot about NOS and how it affects the engine, please leave a message on this thread and tell me the precautions I should take and such...thanx everyonE!
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Old 10-24-2000, 02:56 PM   #2
Dan_E
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Chapter/Region: BAIC
Location: Son Josei
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1999 2.5RS-T <RIP>
2000 RS-TURBO'D

Post

Only good for drag racing and/or Straightaways...Have fun, just don't leave it engauged for too long
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Old 10-24-2000, 03:16 PM   #3
Keith
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Location: Brooklyn
Vehicle:
2012 J train
Brown

Post

Hey I was looking into getting NOS also..I acutally bought the kit but did not install it due to my high milage. But...after reading things that Kevin Thomas has done I am regreting that I sold the kit. Kevin has I thinka 75 shot along with a turbo and hasnot had any problems with his car. If you use the kit youshould have a few things just to be safe:
1:EGT gauge or Air/fuel gauge. you dont want to run to lean..that kills engines.

2:AFC or Fuel Pressue raiser. This way u have enough fuel going to your car. (note, if you get an AFC, u can skip the A/F guage..the Apex unit has one kinda built in )

3: Good sense. Dont leave the NOS on for to long. I think they say to have it on for like 15 secs or so..nothing more than that.

Other than that you should be ok. Its pretty much the same thing as a turbo, just less expensive and not on all the time. Other than that, have fun...and make sure to keep us updated
Keith
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Old 10-24-2000, 04:51 PM   #4
Pipercub
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Location: Remington VA`
Vehicle:
2004 Impreza STI
82 BRAT with 12 in. lift

Post

I know very well the reasons not to use NOS and the very real threat to the engines durability and just how easy it is for something to go wrong fast. The knawing part is I have seen Kevin's car run on the street before. I had a 75 Toyota corolla back in the mid 80's and after scraping up enough to buy a NOS kit and two adapter plates to fit the thing in I ran it for a few years. That little 2TC would scream and roar as I blew past those 85 5.0s in the back of the High School parking lot. I was abusive to the limits of the word abusive and it just kept running. Anyway, the bottom line is if I don't drop one in my RS I am missing out, if I do it will blow on the first run.
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Old 10-24-2000, 08:04 PM   #5
Syms
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2000 2.5 RS sedan
Alpine white

Post

well..I wouldn't abuse it..I wouldnt use it much...its just something there to smoke the damn suped up preludes that think they can take me..haha,..but yeah..i won't be usin it much...its only for the EXTRA umph for when I really wanna see some guys jaw drop when I roar by him
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Old 10-24-2000, 08:38 PM   #6
Eric SS
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Chapter/Region: SWIC
Location: 2013 335i, 2011 G37 coupe
Vehicle:
2000 2.5RS w/ EJ22T
swap and N20. gone. : (

Post

I posted a couple months ago when someone else bought the ZEX kit.

In a car like ours that is already on the ragged edge of exploding, I don't think a dry kit is a smart move.

the EJ25 doesn't have any squirters so the pistons sometimes decide to burn through if they run lean.

This being said, a wet system doesn't make the injectors work harder than they should. It does make the fuel pump work harder but get a Fuel pressure gauge to make sure you don't start droping pressure. If you do, get a larger fuel pump.

Just my $.02

Eric
MY00 Aspen White w/ Nitrous Express Wet system (Never juiced it yet though)

P.S. NOS is a company that makes nitrous (NOS= Nitrous Oxide Systems), not what Nitrous is called
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Old 10-24-2000, 09:19 PM   #7
SkToBe
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Chapter/Region: MAIC
Location: Manassas, VA
Vehicle:
2001 RS
Aspen White

Post

I loved the NOS system I had in my 1st Gen Probe GT. (It was a V8 killer!) Until I started blowing heads... 3 was enough for me. Upgrade EVERYTHING before you install it. (If you intend to hit the bottle often) Forged pistons, rods, copper head gaskets (do they make copper for the Impreza?) transmission, clutch, etc...

Just my suggestion.
Eric
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Old 10-24-2000, 09:21 PM   #8
Eric SS
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Member#: 1914
Join Date: Jul 2000
Chapter/Region: SWIC
Location: 2013 335i, 2011 G37 coupe
Vehicle:
2000 2.5RS w/ EJ22T
swap and N20. gone. : (

Post

You blew the heads! How did you do that?

Eric
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Old 10-24-2000, 09:25 PM   #9
Syms
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Join Date: Apr 2000
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2000 2.5 RS sedan
Alpine white

Post

if I get something to make sure the the car is not running too lean..ex: S-AFC or a fuel pressure regulator or just a umm...gauge to tell me what I am running at..is that ok?? plus I don't plan to bag on the car with the NOS anyways...prob use it like a couple times a month...I don't even plan on keepin it in my car during the week..just stick it in on the weekends at the drags...=0)
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Old 10-24-2000, 09:37 PM   #10
SkToBe
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Join Date: Apr 2000
Chapter/Region: MAIC
Location: Manassas, VA
Vehicle:
2001 RS
Aspen White

Post

First I blew a spark-plug... (dented the hood!) The shop tried to fix 3 times with a heli-coil, to no avail (replaced the head). Then head-gasket went, head warped (switched to copper, replaced the head). Last one was un-diagnosed... I got rid of the car. Besides the NOS, I had an ugraded turbo, BOV, chip, fuel pump, headers, exhaust, stage III clutch, etc... Lean = KABOOM! (not good)

I would send an e-mail to Cobb, RalliSpec or one of the other tuners and see what they recommend you do.

I've only owned my RS for a month, so I'm not looking at FI yet... (yet)

Eric


[This message has been edited by SkToBe (edited October 24, 2000).]
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Old 10-24-2000, 09:47 PM   #11
Eric SS
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Member#: 1914
Join Date: Jul 2000
Chapter/Region: SWIC
Location: 2013 335i, 2011 G37 coupe
Vehicle:
2000 2.5RS w/ EJ22T
swap and N20. gone. : (

Post

A S-AFC or FPR won't be enough. If you do run your car lean, you won't know it untill it is to late with just those mods. A Gauge will let you know instantaniously if you are droping pressure and you an let off the gas, You can even rig up a light to come on if you start dropping pressure so you don't have to be continuously looking at your gauge.

Eric
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Old 10-25-2000, 04:48 AM   #12
N/A
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Location: Maryland (not by choice)
Vehicle:
2003 Echo-daily car
silver

Post

Then there is the legal trouble I got into in Maryland for having a NOS kit installed. There are state and federal laws that cover the use or transport of NOS. I posted the email I got from the Maryland MVA. DO a quick search for NOS and you will find the post. Bottom line is the fine is huge, the judges will seriously look down on it, you need all kinds of stickers stating HAZMAT. I took the NOS kit I had off of the Civic. Not going to risk it again. I would have been better off with a turbo.
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Old 10-25-2000, 07:36 AM   #13
SCRAPPYDO
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2013 F150 King Ranch
Datsun 71 240Z & 68 2000

Post

I have spoken many times on the bulletin board about the evils of NOS. I suggest you do a search on the post that talks about is NOS cheating. Look for "NOS cheating" or something to that effect, because I just dont have the time to type that monster post again.

I know NOS, I just dont have uneducated opinons that tell people not to use it out of ignorace. The bottom line is you WILL use it more than you think, and you most likely WILL turn up the juice. Unless you are one of those incredible, ultra rare individuals, that can contain the impulse to push a little button.

You get what you pay for. Cheap HP is just that, cheap, and it comes with risks not associated with more 'permanent' tuning methods.

I wish you much luck with whatever route you choose.

SCRAPPYDO
stephen
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Old 10-25-2000, 07:48 AM   #14
redbaron
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Location: Tampa Fl.
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06 06 STi
white

Post

is anybody adding fuel???
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Old 10-25-2000, 01:58 PM   #15
Syms
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Member#: 1252
Join Date: Apr 2000
Location: Vancouver West Side
Vehicle:
2000 2.5 RS sedan
Alpine white

Post

hmmm..I think i will invest some money into an air/fuel guage then...that sounds like a smart investment from what imprezonator has told me...

Also...because I don't have an exhaust...I have a stock exhaust and a minnam intake...i am safer off with a stock exhaust am I not?? because if I had an exhauyst..would that cause me to be running more on the lean side??
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Old 10-25-2000, 06:33 PM   #16
Trey
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Location: Austin, the Republic of Texas
Post

Ok ok...I'll admit it. I ran nitrous on my MY98 2.5RS a few years ago. No problems from the nitrous (though the car had an untimely death).

I prefer the NX wet systems. I ran a 50HP shot on my car, which with upgraded cat-back only, netted a 14.5 which could have easily been bested by a better driver (I ran a 16.2 that same night w/o nitrous to give you an ideal of my skills!) Anyway, I stepped it up to a 75HP shot but that was a bit too much for the stock clutch so it slipped to a 14.2 run (same night).

Personally, I think these motors can handle a 50HP shot of nitrous pretty reliably. Push it up to 75HP or more, and you're going to need to pay VERY careful attention to your tuning.

I'm hoping to have time to reinstall the nitrous on my car before we leave for SEMA. This time though, I'll let the Haltech control everything so I'll feel safer with the 75HP shot. Oh, and I'll have a clutch that'll hold too!

Hate me if you will for running nitrous. I know it's not the answer for everything, but it can be done right. You just have to approach it intelligently and respect it's potential to destroy things when abused.

Regards,
Trey
CobbTuning.com
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Old 10-25-2000, 07:37 PM   #17
Eric SS
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Member#: 1914
Join Date: Jul 2000
Chapter/Region: SWIC
Location: 2013 335i, 2011 G37 coupe
Vehicle:
2000 2.5RS w/ EJ22T
swap and N20. gone. : (

Post

Trey, I'm so glad someone has the exact setup that I have! I have a NX wet system jetted at 50hp also. I haven't hit it yet though.

Also, I ran a 16.2 at the track last time so I am looking forwrd to a 14.5! I'm going to hold you to it

Eric
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Old 10-26-2000, 12:31 AM   #18
Syms
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Join Date: Apr 2000
Location: Vancouver West Side
Vehicle:
2000 2.5 RS sedan
Alpine white

Post

I also heard a fuel pressure regulator is good too...I am gonna get one of those too..one that I can adjust inside the car...that way if I am running too lean when running NOS...just turn up the pressure a bit until its good level...when not running NOS I can turn it back down..
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