NOS vs Turbo

[cmcfaul]

How come no one uses NOS on a 911. Seems like it would stress the engine no more than a turbo. Cost, installation, and reversibility are all appealing. Talking about a small hit every once in a while (50-75 hp).

Chris
3.2 Carrera

[908/930]

Sure you could, I think Nitrous oxide is more of a drag race item, but if you drag race your 911 go for it. Could be one way to eliminate turbo lag.

[kamaro]

I think its more "mental" than anything else, just because the word "turbo" is so synonymous with the Porsche 911. saying my Porsche 911 is "turbo'ed" means it is badass. Thats the very reason why I'm now in the process of adding a turbo to my 3.2 Carrera engine.

[Noah930]

It may also be reflective of the type of driving that gets done in a 911. For the canyon driving that I do, I'm not on full throttle for extended periods of time where NOS is typically used. I suppose if I did a lot of drag racing, top speed running, or raced on tracks with long straights then my opinion might be different.

[clutch-monkey]

Wtf do I do half way through a drive when I’m out of nos. Can’t just get it from corner store

[flightlead404]

NOS is basically full on or off from systems I've seen. You can't modulate it with your throttle pedal in the same way.

Plus as clutch-monkey says, I don't have refill my turbo

[baloo]

I'd like to hear more about the NOS argument. HOW can one bring an NOS system to equal the performance of a turbo in terms of HP as well as performance over all types of driving?
The question is: is there a way?? ...outside the box thinking is needed.

NOS hole shots is not a replacement for the across-the-spectrum performance of a turbo...or can it be? E.g., larger NOS tanks? Automatic nitrous injections in response to certain accelerator pedal actions? What about some other highly combustible gases that have similar boosts, but greater flexibility?

Simply based on 99% of threads on this forum, certainly turbos have far too much complexity (and even reliability) to be considered Nirvana.

Maybe this is all futile, given the inevitable ascension of electric motors....
...in which case, using the old-timey performance paraphernalia is appropriate, just to keep our 30 to 40 year old cars period-correct (aka museum pieces, the way of Model Ts)

[cmcfaul]

If it does not hurt the engine, what's the down side of having another 50+ HP on tap for when you want it. We have all been there. Bike or sport car lines up next to you at the traffic light or your coming around the clover leaf onto the hwy with a sports car challenging you. Exit the turn, hit the button for an extra 75 hp. Puts a smile on my face. Hate losing.

Know the purest hate the idea. Its not a track application. Just when you want a boost.

I am compiling the parts for a turbo upgrade when it occurred to me how much easier NOS would be. Installation looks to be a couple hours.

Chris
89 Carrera

[baloo]

Chris, I agree with the logic.
You have to be ready to counter the arguments regarding the volume of NOS needed for a ride in the car, as well as the availability of NOS for replenishment.

I was just doing an internet search and see that electric superchargers are becoming a big thing -- evidently they have overcome some problems voiced back around 2015 and big car companies are thinking about it (past problems were mostly about battery power and speed of the turbine).

Evidently much easier to install compared with the usual exhaust-powered turbos, although I have not done enough reading about it.

Also, have you heard any updates on oil-less turbos? The plumbing required for conventional turbos is just one of the major problems with installation and upkeep.

[908/930]

I knew two people who ran it 20 years ago, one was a bike, both installs were way more than a couple of hrs, more like couple of days. Look into what you going to use for the extra gas required, bump fuel rail pressure or use another fuel injector near the NOS nozzle? If you do not add enough fuel you will need a rebuild quite soon, possibly seconds. The person I knew filled his own bottles, so that can be done, but has added cost.

[cmcfaul]

I would imagine the Nos does not need to be on / off. Why cant the valves open incrementally? the electric turbos are interesting but a novelty at this point. They provide boost at low RPM then are a restriction at higher RPM's. Also need to adjust fuel for the increase in air. With NOS the kits add the NOS and extra fuel at the same time. Wish there was some user data by anyone that has done it. Conceptually, I don't see much down side (unless the air cooled engine internals cant take it).

Chris
89 Carrera

[cmcfaul]

Two solenoids. One connected to fuel supply other connected to the NOS. Both connected to the atomizer plate. Put the plate after the throttle body and done. Would be super easy if there was a plate designed for a 911 making it plug and play.

Chris

[cmcfaul]

would be cool as hell looking having two bottles seatbelted on to the rear jump seats.

Chris

[1Bad86]

I'm listening! I've had NOS on 3 different cars over the years and have used wet and dry kits. You don't need a plate as you could tap in basically anywhere near the throttle body but just before is ideal. You could also tap into the runners of the intake for all 6 cylinders but to keep things simple at the throttle body is the quickest route. Installation is pretty easy and you can have it done in a day if you follow the simple method but when you start tapping into the runners and bending lines to reach everything you add a bunch of time. Just a few years ago they used to send the kits with the bottle already filled so you could be sending tires to the big recycling center in the sky even quicker. You can get several hits from a bottle depending on how much you use it. It would be very useful in passing and on ramps if you didn't get wild with the pills/nozzles. Having that extra instant punch always puts a smile on your face especially when your using " a bit more" but you would notice 50-75hp in cars this small. I'd like to see someone try it in a air cooled 911 and hear their feedback.

[T77911S]

NOS is for drag racers.

[gsxrken]

Originally Posted by cmcfaul

Just when you want a boost.

I am compiling the parts for a turbo upgrade when it occurred to me how much easier NOS would be. Installation looks to be a couple hours.

Chris

Chris, why don’t you complete the turbo upgrade and the see if you still think you need nitrous. If you still felt you needed it afterwards, by all means pursue it and document the effort in this board.

[BYprodriver]

Originally Posted by cmcfaul

How come no one uses NOS on a 911. Seems like it would stress the engine no more than a turbo. Cost, installation, and reversibility are all appealing. Talking about a small hit every once in a while (50-75 hp).

Chris
3.2 Carrera

Nitrous Oxide is simply a means to inject more PURE O2 into the engine along with the proper amount of fuel. The mixture is very cold, enough to cool the engine temp while increasing power. The trick is to achieve the proper mixture because it's easy to run too much Oxygen & lean out the mixture enough to blowup the engine. I worked at a Speed Shop in the '90's,when someone brought their NOS bottle in to be refilled with NOS we would put the bottle in the freezer to get it cold enough to fill to max capacity. We also sold "bottle blankets" to keep the nos cold till race time.

[clutch-monkey]

Originally Posted by baloo

I'd like to hear more about the NOS argument. HOW can one bring an NOS system to equal the performance of a turbo in terms of HP as well as performance over all types of driving?
The question is: is there a way?? ...outside the box thinking is needed.

NOS hole shots is not a replacement for the across-the-spectrum performance of a turbo...or can it be? E.g., larger NOS tanks? Automatic nitrous injections in response to certain accelerator pedal actions? What about some other highly combustible gases that have similar boosts, but greater flexibility?

Simply based on 99% of threads on this forum, certainly turbos have far too much complexity (and even reliability) to be considered Nirvana.

Maybe this is all futile, given the inevitable ascension of electric motors....
...in which case, using the old-timey performance paraphernalia is appropriate, just to keep our 30 to 40 year old cars period-correct (aka museum pieces, the way of Model Ts)

not sure i would call turbo's complex!
as with the nos across the spectrum..Under Suzuki's time attack s15 had nos that would activate by GPS at certain parts of the race track. but these cars only do a couple laps at a time.
i have seen nos in a 930.. it was used to spray the intercooler.

[Rodsrsr]

Originally Posted by T77911S

NOS is for drag racers.

This^^^^ Something about nitrous just seems out of place on a 911 and this is coming from an old school Pro-street car guy.

[Cajundaddy]

Getting the A/F ratio right when you squirt can be tricky and if you get it wrong... blammo! $$$$ Done right it will deliver a few short bursts with minimal damage. Drag racing and time attack are viable applications.