jarroyo

Since project "faded red spot" Is near complete, minus paint. It's time to start thinking power adder. My budget is leaning me towards N2o and I have several questions which I could not find the answers to through searching the archives.

1: What is recomended wet or dry?
2: Do I need to build up the bottom end?
3: How large of a shot can I get away with and still be relatively safe?
4: Direct port vs. fogger

Thanks in advance.

MrLexse

Jeff,
I've tried to keep up with the goings on on this forum for the past year or so (?) and as far as I can remember, discussion of nitrous on this forum has been limited. For some reason it has never caught on here as it has with some of the other car sites. One of the reasons might be the larger displacement engine which gives you power options you won't have with a ricer. Another, I suspect, is pedigree. Bang for the buck it's unbeatable, and it is an intrigueing subject. If you follow up on it, post !
Lex

toofast928

NOX gass is all over the forum just search for it. Successful in the 16V up to 100 hp, single nozzel in the plenum (as far as I know of). extra $$ because you have to tap into the metric fuel supply. Fittings are 30.00 ea.

If you ask me, boost it! Feel the power all the time.....................

mark kibort

NOS, is awesome, do it. the only drawback is the 45 buck bottle refil, for the 12 or so 14 second bursts of 50hp out of a 10lb bottle. actually, this is a VERY good way and safe way to add hp. mixture is kept ideal, and the characteristics of the very cold NOS, helps the combustion process in a safe way as well. stress on the engine is no different if you added the bolt ons to do the same performance gains. (increased mass flow is increased mass flow and thats how you get more power)

i used it in road racing and a 10lb bottle added 50hp on every straight on the track, for a 30min lap.

Button located on the dead pedal for saftey and efficient use of the NOS.

MK

SharkSkin

Some have used it... generally though, since the car was designed to run all day at top speed, it seems that most folks want to keep with that ideal and look at HP options that can also run all day without running out of "gas".

AO

Look at my Nitrous install thread.
https://rennlist.com/forums/928-forum/200769-nitrous-install-update.html

You should be able to get an idea of how it works. On your 81, You'll definitely need to go with a wet system. I used a 75 shot. I never had the coconut to go any higher, but I suspect it would have taken 100 or even 125 without too much issue.

I used Kilbort's old system, so most of the fittings were there. Your hardest challenge will be mounting the nozzle to the intake, and making the fuel rail adapter. Fee free to email me if you need at andrewmolson"AT"yahoo.com. I've since sold the car, but I've still got loads of pictures and the install is pretty fresh in my mind.

All I can say is that the quest for HP is addictive. Once I installed the NOS - I needed something much more! So I bought the GT, and will now be SuperCharging it. Call me crazy. But NOS is fun - plush it gets a lot of attention!

MrLexse

Thought I was going crazy, so I searched the Forum for Nitrous Oxide - eight threads in the past year! I searched again for mention of the word "Nitrous" and got many more, but if you read through them, I think you'll find that the references are peripheral and few have led to any type of deep involved discussion. "Boosted" discussion tends to get alot more press here.
BTW, for what it's worth, NOX has been said to be an excellent anti-detonant and as such, may be a good precurser for a later boosted system.

jarroyo

Andrew, I saw you post and really don't like the idea of introducing the Nos at one end of the plenum if it were more centralized I could see it, but it seems tha iin that position cylinders 1 & 5 would be getting the most leaving the other cylinders to leanout. This is the system that I've been looking at lately.http://www.powerandperformancenews.c...duct_Code=V8DP It's a direct port system which I like because it gives the same amount to each cylinder. As far as filling a bottle. The car only gets driven hard on saturday nights when I meet with my local car club. So if I burn $35 + 1 tank of race gas so be it.

AO

Direct port is very cool - if you can do it. I thought you were looking for the budget concious version. FYI, Mark Kilbort ran 2 or 3 season with the setup in my post with no ill effect. Let us know what you decide!

mark kibort

actually, not an issue. the NOS and fuel nossil is pointed to the top middle of the plennum, and becuase the air is fed to all 8 from the plennum, all cylinders get a very even flow, proved by close examination of the plugs after a WOT dyno run, and cut off immeadiately, and 2 full seasons of using it. no piston differences, no plug appearance differnces, and a very even fuel air curve set at 12.5 without NOS and 12.3 with NOS. 50hp and 60ftlbs of torque.


sure a direct port wet system is great, but mainly for the 175 to 250hp adders!

at 50-75, its not an issue. its not as intuitive as you may think. flow to the cylinders is very hard to make "uneven".

MK

David L. Lutz

I am running a holly (#05131NOS) wet fogger with a 125 nozzle for the nitrous. Been using it for about 9 months and had no problems.

I don't know if I can help you much with your 81' mine is an 87'.

Email me if I can help, good luck you will enjoy it!

David

mark kibort

any pics of the nossil installation in the S4 plennum?

MK

David L. Lutz

Sorry no pics! I installed the nozzel in the MAS (mass air sensor) on the passenger side, down stream from the wire sensors. I drilled and tapped a hole, but believe me there is no room for error. Both gasoline and nitrous lines run into the nozzel and its hard to judge where the hole should be so that the lines will fit.

I also removed both screens (I think I got this idea from one of your eariler post). It really works well
I gained over 2.5 seconds in the 1/4 mi.. However that has a lot to do with how early I hit the button.
I usually try and restrain myself from hitting the NOS until after 2500 rpm. What I really need and recommend is a controller, but for now the budget doesen't permit.

Fabio421

I have never used NOS so I'm not entirely sure how it is controlled. But do you have to refrain from shifting while the NOS is being injected. The only reason I am saying this is because it seems like your mixture might go lean if you came off the gas during a shift while fogging. How do you keep this from happening?

Imo000

Most of the N2O setups use a WOT switch to activate the system. If the throttle is not at 100% the system will not run. Simple and effective.