Nitrous Install Pics

[scottewid]

Ok, here are some pics of my nitrous install! I finally decided to buy a digital camera, cause I figured I'd never get around to developing and scanning.

This is the bottle (I ran the nitrous line on the bottom, along the fuel lines and held up w/nylon zip ties)




This is the solenoid assembly. It's bolted to the little lip at the bottom of the air cleaner



This is the nitrous feed line into the air boot


This is the wide open throttle switch


This is the fuel pressure regulator hook in. That vacuum hose is hooked to the nitrous pressure regulator, which sends 50psi n2o into the fpr to increase fuel pressure. There's a T that hooks into the regular manifold vacuum line so fpr behaves normally when not on n2o.

[Weldin]

So - you didnt tell us how it works! IS there a big power increase or what? How much did it cost you. How long did the install take?

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[Lawrence Coppari]

Neat pictures. Tell us about performance increase.

[scottewid]

For everyone who asked about performance increases, price, and how well it works, here's a cut and paste of my previous posts. I didn't feel like typing it all up again! If you still have any questions not answered here, let me know!

18 Jan 2001
Well, I've done it: Nitrous Oxide on my 1984 944 na. Now I know you're thinking "..the fool!!! He's gonna blow his engine!!! First, though, I'd like to say thanks to Porscheboi, fellow bottle feeder, for you advice on my previous nitrous posts!
Secondly, I'd like to say: My ooooh my, does it exceed my wildest expectations!!!! This is truely horsepower in a bottle for dirt cheap and 6 hours of install time, if you take it slow!
For all you 944 na'ers who know that your car has all the potential it was designed for, but is horsepower/torque challenged, and have thus started dreaming about turbo transplants, Rimmer Supercharges, and the LT1 V8 coversion, I have to urge you reign in those costly and involved fantasies. First, give the bottle a try, and if your power lust isn't satiated, then I say GO FOR IT on all the above mentioned exotic mods!
I paid $419 at Carparts.com for the NOS 05123 EFI dry system. I also purchased an extra 10lb nitrous bottle and bottle warmer (the nitrous bottle should be 85F for best performance), for a grand total investment of $750. My 1984 na is bone stock. This was the only performance mod and it was the easiest 6 hour install of my life.
I was a little nervous about testing it because if you don't have enough fuel flow to compensate for the extra oxygen pumped in with the nitrous, you're gonna go real lean and maybe hole a piston. The kit increases the fuel pressure to richen the mixture, but I adjusted the DME to the 6% rich setting, just to be safe and filled up with 93 octane (I usually run cheapo 87 octane).
The nitrous kit has a wide open throttle switch and only kicks on at WOT. You should also only engage at 2500 RPM or higher.
I tentatively took it out tonight on a side street and kicked it in..."hmmmm", I thought, "seems pretty peppy, but not quite what I would have expected..." So I took it home for the requisite spark plug inspection (to make sure you're not burning too lean) and discovered the solenoid groud wire came loose. Turns out I wasn't injecting nitrous afterall! That fixed, I went out again, being sure to stay within 1/4 mile of home in case I blew up the engine...
Accelerated fairly sedately in first without hittin WOT, shifted to second, watched for 2500RPM at 3/4 throttle, floored it and accelerated as expected for the first half second...then the old "butt dyno" registered something big time different! I've never driven a 944 turbo, but I've got a Saab 900 turbo, and this rush definitely felt like turbo kick! The engine also whined at a much higher, but not at all offensive or alarming pitch! Shifted to third, screeched the tires, and was at 75mph before I knew it. Not the slightest hint of detonation or pinging, overheating, or otherwise undue stress on the engine! This was with the 60 horsepower jet. The kit comes with a 75 HP jet also. Took it home, checked the plugs and they're clean as a whistle: no evidence of preignition.
Bottom line: I'm mucho impressed at the performance I've gotten for $700 and 6 hours of labor. I've never driven a 951, but I'd reckon this mod puts my na close to the acceleration potential of the turbo (using only the 60hp jet!). There's not the slightest hint of any adverse affect on my engine, which makes sense since I'm only running a 60hp shot (143+60=203hp), and our na's have the same bottom end as the turbo. Each ten pound bottle of nitrous supplies about 3 minutes at a 60hp jet....not bad since most of my WOT sprints last only 15 to 30 seconds at most. Give it a try before you invest in other costly mods. If you don't like it, it can be unbolted in an hour or less, leaving no evidence that it was ever installed.

20 Jan 2001
awilson40: I get mine filled at a local speed shop and it costs $35 for a 10lb fillup. I'm still in the experimental phase, so I've only used it in real short bursts. Even so, after ten full 0-75 sprints, and who knows how much I lost due to loose fitting leaks during the intial install and set up, I just weighed the bottle and it still says 22 pounds (15 pounds for the empty bottle, means I only burned 3 out of 10 pounds)!
If you go to the NOS website www.nosnitrous.com, they list by state dealers who have refill stations.
The 05123 is the right kit for the 240sx. It seems Zex kits (www.zex.com) are pretty popular with the Japanese car crowd. It's a little more pricey, but Honda drivers are always selling them used for cheap on Ebay, as they step up to the Venom kit ($1,000), which is a lot more sophisticated.
Otto: my home email is scottewid@att.net. I check that once every couple days or so, so don't think I'm ignoring you if I don't respond right away. You can get me at work at scott.young@prudential.com, but I prefer to use work sparingly for personal business. Feel free to use it for a quick note every one in while though.
As for the price: The list price on carparts.com is $519, but I went through www.amazing-bargains.com, which offered a carparts.com discount of $100 for first-time buyers on purchases over $250. I just checked and don't see that offer anymore. It's now down to $30 discount on $100 and over purchases. I guess a lot of people were taking advantage of it. $489 is still pretty good though, but you might be able to get a slightly better deal at summitracing.com, cdsracing.com, or a used setup on Ebay.
porscheboi928s: I'm using the 34 jet, which NOS claims is 60hp. The kit also has a 36 jet, which they say will provide 70hp. Maybe the novelty has yet to wear off, but I can't imagine ever needing to try anything higher! I took it out last night and the roads were wet from a recent rain, and I literally COULD NOT use it in second gear (haven't gotten the guts to kick it in in first yet....you think it would be OK?) because of the total loss of traction and wheelspin at the 1-2nd shift. Even in third, I was getting copious wheel spin!
As for your mods, all I can say is you're a madman! I'm worried about adding 70hp to my 143 mill, and you're going to squeeze 300whp out of 2.5 liters, with no other reinforcing mods!!!! What size nitrous jet is that?!! Aren't you at all worried about something giving out? I can't even imagine that, but I guess I'm still basking in the glow of my own modest hp gains....talk to me in 3 months and I'll probably be trying to figure out how to get up to the 125hp jet!! Good luck!


5 Feb 2001
I'm running the 60 shot. If you got the NOS 5123 kit, it's the .034 jet. It also comes with the .036 jet, which claims 75hp. I have zero modifications, other than running plugs one range colder and the DME on 6% rich, and it works great. I tried the 75 shot a week ago and kicked it in on dry pavement, 2nd gear 3k rpm and totally lost traction and the rear started fishtailing. I almost lost control and went into the highway barrier, but let up immediately and straightened out after 4 oscillations, WHEW!
I'm sticking with the 60 jet for a while! It seems more than enough! My friend and I did (admittedly extremely rough) 0-60 times. He had the stopwatch and we did 3 with and 3 without. Non-nitrous, full tank gas, two 180lb people 0-60 was between 8.1 and 8.4, with nitrous was 6.8-7.4. The actual numbers aren't really important, but I think it shows you'll get at least a full second off with the 60jet.
I retarded timing when first testing, and doesn't seem to need it with the 60 jet. Just be sure to check your plugs immediately after the first nitrous run or two. If you see signs of detonation, retard it, get colder plugs, and get higher octane.
If you live in a cold climate, you'll need to get a bottle warmer, because as the bottle gets cold, pressure drops dramatically. I left a 3/4 full bottle in the garage overnight, tried it next morning, and got virtually zero increase in acceleration. Turned on the bottle heater and let it warm up for 1/2 hour and presto, mashed back in the seat, cheeks peeling back acceleration again!
Also, a warning about using it in higher gear: I engaged in 4th gear at 3krpm, started accelerating, and then the tach started to wind out as the clutch began slipping. My clutch may be on the way out, but I get zero slippage any other time, and it's not making any noise. So it's either that my clutch is just starting to go and only displays symptoms at the higher power, or it's ok, but just can't transmit the higher torque at the top end. 1st, 2nd, 3rd, running nitrous up to 80mph is fine, but I'd refrain from 4th, and never 5th.

[wolfrpi]

nice setup! what's the 1/4 mile time? What year Saab turbo? I've got a set of 16inch aero wheels and a custom APC turbo control box if you're interested.

Erick

[scottewid]

No idea what the 1/4 mile time is, but hope to take it to the track this spring (all tuning and testing has been done on the street sofar)

As for the Saab, it's a 1997 and still under factory extended warranty, so I don't do anything to it. Thanks anyway for the offer of wheels and turbo controller, but its still too new for me to need to do anything to it!

[gixer02]

that's awesome... I hope it's regular wear not the nos that caused the clutch problem, although about 50% extra power should cause extra wear. What would be cool is if on an 86 951- 217hp + 60 + 48(autothority stage 2)= 325 hp from about $1500 dollars of mods... of course that's if you have the 951(one day... hehe) I was thinking of doing exactly what you did to my 83na but it almost has 190k and so I'm keeping it 100% stock until I have enough cash for the 951. I hope it never causes problems... but only 60 hp when I thought about doing it b4 I saw that you did it I guessed it would be modest enough to not cause problems

Pat

[Andre]

can you put nos on a 951?isn't it bad on turbo cars cuz of the high compression? Has anyone tried putting nos on a 968?

[Rollins]

Honestly, why would you need NOS for a 951?

[wolfrpi]

you must be young

speed is addictive - the more you have the more you want - Im considering a 100 shot for my next 951

[AndrewT]

To go faster, duh.

[porscheboi928s/c944t/n]

Here i go........

when i installed my NOS on my 86 951...

75 shot..13 psi boost and a europroduct chip......287.8 whp at the rear....

i then changed the jettings to a hundred and ran a supra TT on a 1 mile race....too bad ...car bugged down...lost 500.00 on it...Smilewavy

then i raised the boost to 20psi. maxed...and an 80 shot(didn't dynoed)....took it to the track(1/4 track)last march....car went 12.8's at 108 mph traps(once) then 13.1's twice...with bad R.T...engine is stock even the turbo with 120000 miles on registering on the clock...oh...by the way i changed the throttle body to a 65mm Ford mustang throttle body...






now i'm working on the motor(full rebuild)again....(not related to NOS..)


Also i am going to try the ford 2.3 turbo clutch solid hub(same spline) just counted it...but disk is 1/4 of an inch smaller..and if i remember correctly ford have 3 diff. sizes clutch disk...(1 i got is the smallest disk)