To NOS or not to NOS your 928

Hi All

I was asked to contribute here on Nitrous for a 928

I have run Nitrous on my 928S2 starting with a 50 hp system and working my way up to a 2000hp system lol

For any that do not know me , I hold the UK 1/4 mile record for 928s at 13.035 seconds @ 113.3 mph, and also the Uk top speed record for 928s at 208.1 mph.

Both of these would not have been possible without Nitrous


Any questions on anything to do with 928s and Nitrous... ask away....

All the best Brett

Thanks Brett, what are the different types?

Brett928S2;693 wrote: Hi All

I was asked to contribute here on Nitrous for a 928

I have run Nitrous on my 928S2 starting with a 50 hp system and working my way up to a 2000hp system lol

For any that do not know me , I hold the UK 1/4 mile record for 928s at 13.035 seconds @ 113.3 mph, and also the Uk top speed record for 928s at 208.1 mph.

Both of these would not have been possible without Nitrous


Any questions on anything to do with 928s and Nitrous... ask away....

All the best Brett

928mac;695 wrote: Thanks Brett, what are the different types?

Hi

I just posted this on Pelican so to save my ancient fingers typing it again, I will copy it here...

"Now I need to explain some basic Nitrous stuff first....

This might sound condescending or strange to you as I am English and although we both speak the same language (ish) , sometimes things come across differently...lol , so please ask if you are unsure of what I mean....

Firstly a lot of what I will say is MY opinion only and other people who use Nitrous may well disagree with me... probably a LOT of them....

Without sounding immodest though, I suspect I might be the worlds foremost expert on Nitrous for 928s..I use enough of the stuff to qualify lol.

Ok..so lets get on with it....

There are two types of Nitrous system...

1, WET

2, DRY

The difference between the two is that A wet system provides EXTRA Fuel AND Nitrous both at the same time....

A dry system ONLY provides Nitrous to the engine and it relies on YOU (or the cars electronics) to provide the extra fuel it NEEDS.

Now come the controversial bit..... most American systems are DRY systems and the one and only UK system (Wizards of Nos) is a WET system...


Most American Nitrous experts would usually say, run a dry system as they are fine and have worked for 50 years.....

"I" would say....NOOOOOOOOOOOOOOOO... a 928 will NOT run a dry system easily or safely...

So if you want my advice , on a 928 in particular you MUST run a WET system....

My best advice to you is to buy a Wizards of Nos system from one of their American dealers as they are miles ahead in Nitrous technology.

Their systems are easy to fit and will run perfectly happily on your CIS system.

It will take you around 2 hours if you take your time to fit the kit.....assuming you are reasonable with spanners....(if you can change the plugs on a 928, then the kit will be easy)

The kit will contain a CROSSFIRE Jet plus piping plus bottle plus switch plus relay plus Pulsoids plus jets....

You can add other stuff later , like a bottle heater and a controller if you wish but that depends on how much hp you will use......for 50 hp you dont need them and you only really need to think about them from around 100 to 150 hp upwards

The huge advantage of Nitrous is that you drive the car perfectly normally UNTIL you want the extra power (mine is my daily driver as an example)

I do warn you that Nitrous power is very addictive lol

The more you have the more you want...hehe

Any more questions, just ask

This is the sort of kit you should be looking at >>> www.noswizard.com/product_list.php?id=19

All the best Brett "

N2O-928;679 wrote: Not so if done correctly, you must be watching the videos where these guy are spraying (or more like dumping) 150 and greater w/o corectly removing timing and adjusting the AFR. Sure if you dump a large HP charge it is not good for the rings and gaskets.

Nitrous done corectly will not hurt the eng, all you doing is adding Ox and fuel in a metered amount to produce the HP you want.
There are many Turbo and SC cars that cook their engs too if the timing and AFR are incorrect.

There is no denying that nitrous induction generates greater cylinder temperatures. As with any forced combustion system, nitrous adds a strain on the bottom end also. Even as tough as the 928 engine is, I don't feel like it is indestructible. Why do you think so many guys build up their internals with h-beam rods and such before they "spray"? It's just something I don't have the guts to try with a 928. I agree that the tune makes all the difference in how potentially dangerous a power adder can be to any engine. I guess I was just turned off by nitrous the last time I pulled green spark plugs from a fox body mustang.

KilnRed;699 wrote: There is no denying that nitrous induction generates greater cylinder temperatures. As with any forced combustion system, nitrous adds a strain on the bottom end also. Even as tough as the 928 engine is, I don't feel like it is indestructible. Why do you think so many guys build up their internals with h-beam rods and such before they "spray"? It's just something I don't have the guts to try with a 928. I agree that the tune makes all the difference in how potentially dangerous a power adder can be to any engine. I guess I was just turned off by nitrous the last time I pulled green spark plugs from a fox body mustang.

Hi Austin

There is a lot more known these days about how Nitrous affects cylinder temperatures and pressures, mainly thanks to Trevor Langfield (owner of Wizards of Nos)

When high pressure (950 psi) LIQUID Nitrous enters the cylinders it does what is called "phase change" , which basically means it changes from a liquid to a gas... that assumes it actually gets there as a liquid, which only certain systems manage ...(WON systems are the only one I know that manage that perfectly)

Phase change will DROP the cylinder temperature by roughly 65 degrees and then combustion and nitrous dissociation (where the nitrous and oxygen molecules separate) happen and the cylinder temp increases by around 70 degrees... so hardly much difference.

I do emphasise that the nitrous MUST reach the cylinders as a liquid though....and most systems cannot manage that.

As far as 928 engines taking the extra power of Nitrous, its a VERY VERY strong engine and can take huge amounts of Nitrous that no ordinary 928 owner will ever come near (apart from nutters like me lol)

Its a matter of SMOOTH delivery to the engine which is done by Pulsing the Pulsoids ....

All the best Brett

Brett928S2;704 wrote: Hi Austin

There is a lot more known these days about how Nitrous affects cylinder temperatures and pressures, mainly thanks to Trevor Langfield (owner of Wizards of Nos)

When high pressure (950 psi) LIQUID Nitrous enters the cylinders it does what is called "phase change" , which basically means it changes from a liquid to a gas... that assumes it actually gets there as a liquid, which only certain systems manage ...(WON systems are the only one I know that manage that perfectly)

Phase change will DROP the cylinder temperature by roughly 65 degrees and then combustion and nitrous dissociation (where the nitrous and oxygen molecules separate) happen and the cylinder temp increases by around 70 degrees... so hardly much difference.

I do emphasise that the nitrous MUST reach the cylinders as a liquid though....and most systems cannot manage that.

As far as 928 engines taking the extra power of Nitrous, its a VERY VERY strong engine and can take huge amounts of Nitrous that no ordinary 928 owner will ever come near (apart from nutters like me lol)

Its a matter of SMOOTH delivery to the engine which is done by Pulsing the Pulsoids ....

All the best Brett

Sounds like a reasonable explanation to me, and yes, these engines are very tough. That I do know. Perhaps nitrous may be a healthy power adder after all. I must admit, I think I'm due to do a little more homework on the subject myself. To be truthful, I still wouldn't have the guts to try it myself only since I have seen so many bad experiences with nitrous-use on other autos.

Very educational thread.