Nitrous Oxide
05-19-2016, 03:22 PM
#77
05-19-2016, 03:41 PM
#78
Race Director
The way nitrous works (or more correctly, the way you take advantage of nitrous) implies that people using it are driving their cars harder than many typical Porsche owners. A properly set up system with TPS and window switching will only fog at full throttle when the RPMs are within the acceptable range - typically the higher end of the power band where engines make the most HP.
Any machine that is used at or near capacity wears out faster than a machine that is used at 50% load. While there are plenty of people who will argue, this is one of the reasons that race motors have life spans counted in hours, not years.
Someone who wants the bottle - or a turbo or a supercharger, for that matter - is not satisfied with how the car performs at peak output, so they add a forced-induction solution to make the car produce MORE power. While it's true that there is parasitic draw on a motor for superchargers, it's also true that if you keep your foot out of it, your supercharged car isn't going to abruptly die. If you're running *****-out between every stop light and every chance you get, there's a good chance you're going to tear something up.
Nitrous isn't any different. There are some guys at the Corvette shop I go to that have sweet thousand-dollar Nitrous Express setups on their 'Vettes - which they've used maybe 5 times in the past several years. Unless they do something stupid, these probably aren't going to be the cars that pop. The kids who are running the bottle all night long at Race Legal and squeezing an extra 100HP out of a 150HP engine, on the other hand, are going to break something eventually.
As for bullet-proof Porsche motors - if you build a thousand-horsepower motor on a stock block - and run it often at a thousand horsepower - you will break something. If you build a thousand horsepower Porsche and drive it at 55MPH to Cars and Coffee once a month, you won't. Some people who beat on their cars have great luck and don't have a lot of failures - but EVERYONE I have known over the years who has strapped forced-induction on their cars and actually used it has eventually broken something.
I supercharged the car I had before I bought my 986. Stock, it made 172HP at the crank; I tuned it to make about 300 at the wheels. It was also tuned to run rich, I built an intercooler to keep the charge as cool as possible, and iced the box down the few times I did drag pulls. I drove it supercharged for a couple of years...the kid I sold it to strapped on a huge throttle body, changed out the SC pulley, didn't bother to tune it, and put a hole in the block a few months after he got it. *shrug*
Running in fear from the bottle is stupid - I'll go along with this assertion. However, claiming that a blown motor - regardless of whether the forced induction comes from a turbo, a supercharger, or a bottle of nitrous oxide - will be as reliable as it would have been stock is simply not true.
Any machine that is used at or near capacity wears out faster than a machine that is used at 50% load. While there are plenty of people who will argue, this is one of the reasons that race motors have life spans counted in hours, not years.
Someone who wants the bottle - or a turbo or a supercharger, for that matter - is not satisfied with how the car performs at peak output, so they add a forced-induction solution to make the car produce MORE power. While it's true that there is parasitic draw on a motor for superchargers, it's also true that if you keep your foot out of it, your supercharged car isn't going to abruptly die. If you're running *****-out between every stop light and every chance you get, there's a good chance you're going to tear something up.
Nitrous isn't any different. There are some guys at the Corvette shop I go to that have sweet thousand-dollar Nitrous Express setups on their 'Vettes - which they've used maybe 5 times in the past several years. Unless they do something stupid, these probably aren't going to be the cars that pop. The kids who are running the bottle all night long at Race Legal and squeezing an extra 100HP out of a 150HP engine, on the other hand, are going to break something eventually.
As for bullet-proof Porsche motors - if you build a thousand-horsepower motor on a stock block - and run it often at a thousand horsepower - you will break something. If you build a thousand horsepower Porsche and drive it at 55MPH to Cars and Coffee once a month, you won't. Some people who beat on their cars have great luck and don't have a lot of failures - but EVERYONE I have known over the years who has strapped forced-induction on their cars and actually used it has eventually broken something.
I supercharged the car I had before I bought my 986. Stock, it made 172HP at the crank; I tuned it to make about 300 at the wheels. It was also tuned to run rich, I built an intercooler to keep the charge as cool as possible, and iced the box down the few times I did drag pulls. I drove it supercharged for a couple of years...the kid I sold it to strapped on a huge throttle body, changed out the SC pulley, didn't bother to tune it, and put a hole in the block a few months after he got it. *shrug*
Running in fear from the bottle is stupid - I'll go along with this assertion. However, claiming that a blown motor - regardless of whether the forced induction comes from a turbo, a supercharger, or a bottle of nitrous oxide - will be as reliable as it would have been stock is simply not true.
Last edited by 5CHN3LL; 05-19-2016 at 05:55 PM.
05-19-2016, 05:18 PM
#80
Yes my 996 is normally aspirated however, I have a few other Porsche projects in the works including a twin turbocharged 914 with a 3.8 that Ohta be a lot of funI finished the nitrous install last night on the 996, kit is from dynotune. they make a Porsche kit and I got to say it's a very well put together kit and I tested it twice so far best $430 I spent love it it's jetted at 75hp comes on very smooth nothing scary but you certainly feel it it's just like a whole lot deeper power band. You guys don't know what your missing it's fun!
Please keep us updated.
Thanks, they are custom powdercoated BBS RS-GT 18" wheels. I have a set of 19" Champion RG-5's too I might switch out sometime in the summer once I get some new rubber for it.
