Tampa 928s

Now don't start but I have been requested to install a Nos system on a 89 S-4.

I would like a little feedback on routing Dry vs Wet and nozzle location options.

I know this is a sacrilege in some circles; but since this IS GOING TO HAPPEN, any feedback would be greatly appreciated.

rgs944

I always thought that NOS is a good way to add cheap HP and thrills to any car. There are lots of guys that have run modest amounts of NOS for a long time with very good results. Keep it a modest shot and don't overuse and I think it could be a lot of fun for you. I look forward to hearing about it. I think the guys that get into trouble are always testing the limits. Kind of like the results of drinking a few beers with friends, or ending up in a ditch somewhere after binge drinking Jack Daniels for 16 hours straight.

EspritS4s

Where's Brett928S2 when you need him?

Tampa 928s

well I think a 1000 Hp is not the goal we are looking for AKA Brett!
I am more interested in nozzle placement and component hook up locations.

Murray

I think DaveK9 has a NOS set up in his.

Ed MD

Use a wet system. On my 944 I installed a NOS system. Tap into the end nut on the fuel rail for your fuel line component. I installed a relay for the overall power that was turn on by taping into the coil ignition switch line, so the only way the system would be arm if the key was on. I put the nozzle right after the MAF. I also punched out the small screens on the nozzles and used a large inline filter instead, as they clogged on me several times. I had a lit arming switch, but had the system set up to "hit" via a kick down switch on the pedal from an automatic, thereby I was at WOT whenever the nitrous hit. On the 944 I also had one of the fans kick in when the system was armed. It was a blast, I'd out run the turbos! I would recommend getting two bottles, so you always had a full tank on board. Also get a decent scale as that's the best way to know how much nitrous you have left.

Brett928S2

Hi

As my advice doesnt seem to be needed , I will watch with interest...

All the best Brett

Tampa 928s

Brett, your advice and knowledge is needed just not for so much HP

Brett928S2

Hi

Lol..ok I did start with 100 hp originally by the way....

First ...wet or dry....answer WET.....The reason is that its too hard to program the S4 injectors to increase the fuel at the appropriate rate, and wet is always safer as you want extra fuel and Nitrous in the correct matching proportions...

If you go DRY and get it wrong you will looking for a new set of pistons to replace the ones with the holes in them....

So if you only take one piece of advice from me...please take that one

Location for the Nitrous/fuel injector or injectors depends on whether you go for single point (good for around 100 to 150 hp max) or direct port (good for around ...dare I say it.... 150 to 2000 hp..lol )

The point being if in the FUTURE the owner intends to go above 150 hp you need to fit DP now to save him money in the future...

Location for the single point...is as close to the MAF as possible...

DP is a lot harder to say as it depends on the system and which controller you use....

Single point at say 100 hp you wont need a controller although it would make it smoother....150 hp or Dp you WILL need a controller...

Hope this helps

All the best Brett

victor25

I had NOS on my 84s and it worked pretty good. I put the nozzle on the bottom of the air cleaner box so it would be hidden. Then set it up to make the fuel pressure jump up to about 80lbs. It was setup to kick on at WOT and with the boost switch flipped, it worked really well. You could not see the system at all which was really cool. But that was an 84 and your working on an 89, so I am not sure if it would mess with the MAF sensor.

When I sold that car I took it all off and have it sitting in my shop still if your interested.

I will say this though. I am WAY more happier with a supercharger than I was with the NOS. The supercharger is always there, wont blow up my car, that damn NOS bottle cost way too much to fill, and didnt not last very long! You really should think about a supercharger kit instead. There are a few nice ones out there. Mine only takes a few easy hours to intsall, is super dependable, and man does it add some killer power.

Tampa 928s

I don't believe over 150 Max in this application. with the S-4 the nozzle location is what I am interested in.

928mac

I always thought that the nozzle should be between the MAF(if you have one) and the intake so that it dose not get cooled by the NOS.
it can be mounted in the rubber boot so I was told (I'm undecided on that though)
I was going to mount mine under this temp sender on the tube that replaces my MAF.

Brett, isn't this the correct spot to inject the fuel and NOS?



Nitrous System Universal For 8 Cylinder Multi–Point EFI Engines w/10 lb. Bottle at the link below

http://www.holley.com/05131NOS.asp

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Brett928S2

Hi

You want the nozzle as close to the valves as possible...so in the maf is preferable to in the rubber collar above and so on... the further from the valves the softer the hit and the lesser effect you will get from the Nitrous...

Also you want the pipes that feed the nozzle as short as possible from the Solenoid and of EQUAL LENGTH <<< VERY important...

The length of pipe from the main bottle should ideally be as short as possible but if its more than around 3 feet you really need a purge solenoid to clear the pipes before activation... its not crucial but I would advise it...

All the best Brett

Tampa 928s

So would that not effect the sensor wire it seems that it should be tapped in after it?

Brett928S2

Hi

Ideally you want the nozzle AFTER the wire as Nitrous under pressure is cold plus the phase change (when its released) drops the temperature drastically...thats one reason why Direct port systems go straight into the plenum runners and also why its much easier with DP to run higher amounts of HP under DP...

All the best Brett