To NOS or not to NOS your 928

That is the question

NOS is cheep but what are the options

www.redline.lt/87/550-hp-porsche-928-nos-fogger-unichip/

www.andysautosport.com/nitrous_oxide_kits/porsche_928.html

forum.nitrous-advice.org/

Turbos are an incredible performance enhancement as well.

When chev added the turbo to the (Grand National) that little 3.8L came to life and would eat hot rods with big blocks in them.

The repairs that I had to do to them were Oil leaks due to the high crank case pressure due to blow by, and the heat melted everything close.

My problem with turbo systems is only the added heat under the hood and the minor part is the lag that some systems have, other then that, its a great enhancement.

Super charging your car (in my opinion) achieves the same result without near the heat and zero lag.
I would never dicker one over the other because they are both great systems and are ment to be installed and enjoyed.

NOS (IMHO) would be a better option for the guys that have to deal with state laws because it can be uninstalled, easier.
They can then get the smog check done, go home, reinstall there NOS and go blow the doors of some vet all in the same day.

The turbo and the supercharger are systems that have a different feel and both have pros and cons.

If I had the cash i would have to think long and hard but due to the changes in the SC world in drivability and tun-ability, I would lean that way.

The Roots type blower is a serious system and thats why top fuel pros use it.
The centrifugal SC is the answer for smooth but kick your A$$ power

The Turbo is the (back in the day) smoother increase in power adder which is why the industrial world uses the turbo on everything, but as I said above, the centrifugal system can be a very friendly system.

I am not a pro in any of these areas, just a mechanic that has had to deal with them over the past 20 years.

Oh, what am I going to use, ... NOS because it is cheap and if I decide that I want a SC or Turbo down the road, its not a waste of money that will sit in the corner.

I am not so much a fan of forced induction. That said, IF I were to ever change my mind, I would feel more inclined to go the turbo route with these cars. I don't like blowers. They're too high maintenance for my taste. Besides that, a 928 engine can be turbo'd for not too much $$ or hassle. You can use the 951 turbos and related equipment on our cars, too. The only concern is room. I once saw an '85 twin turbo with the 951 equipment on each bank. The guy had to cut into the inner structure to make it fit, but believe it or not, it actually looked neat. If I had to guess, I'd say he was making 500 horsepower easily with his setup.

I WOULD NEVER CONSIDER SPRAYING NITROUS... I just think it's too hard on an engine. It's no friend to rings and seals. It's my belief that these engines are just too extraordinary and rare to abuse in that way. Save the juice for the more readily available, cheaper engines of the world. Just my take.

KilnRed;667 wrote: I am not so much a fan of forced induction. That said, IF I were to ever change my mind, I would feel more inclined to go the turbo route with these cars. I don't like blowers. They're too high maintenance for my taste. Besides that, a 928 engine can be turbo'd for not too much $$ or hassle. You can use the 951 turbos and related equipment on our cars, too. The only concern is room. I once saw an '85 twin turbo with the 951 equipment on each bank. The guy had to cut into the inner structure to make it fit, but believe it or not, it actually looked neat. If I had to guess, I'd say he was making 500 horsepower easily with his setup.

I WOULD NEVER CONSIDER SPRAYING NITROUS... I just think it's too hard on an engine. It's no friend to rings and seals. It's my belief that these engines are just too extraordinary and rare to abuse in that way. Save the juice for the more readily available, cheaper engines of the world. Just my take.

I agree 130% that any performance increase is harder on everything and the last thing I want to do is takeout a 928 Vin# by loosing an engine.

So far mine is stock except for the Alt and the Y-pipe which I am hanging on to the original equipment. Oh ya the stereo and 6 speakers were missing or total junk so I had no choice but to install aftermarket.

I am going to research the NOS thing before I make any decision. I want to know if it will dry out the heads as it dose on cast heads, and I want to know the effect on the rings, valves, and nicisil cylinders.

If it can be a maintained controlled burn with just a little extra fuel and O2 then I don't see a problem.

A Progressive Nitrous System can be tuned to come on just like a Turbo or SC system and is only active when you need it, your not driving a modified 928 all the time. IMHO SC and Turbos are great for Track use when the power is needed lap after lap, but not on the street

Mine starts pulsing at 2500 and increases to 4200 RPM and then it is wide open. All controled by the factory WOT and RPM signal.
Just activate it and drive, no buttons to push

Here is a vid from this weekend, enjoy !

Dave

KilnRed;667 wrote:
I WOULD NEVER CONSIDER SPRAYING NITROUS... I just think it's too hard on an engine. It's no friend to rings and seals. It's my belief that these engines are just too extraordinary and rare to abuse in that way. Save the juice for the more readily available, cheaper engines of the world. Just my take.

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.