The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by JOE ORDING on October 16, 2001 at 10:41:18:

In Reply to: Re: NITROUS OXIDE EXPERIENCE posted by Alan B on October 16, 2001 at 10:29:03:

I anxiously await your results. Anyone care to take bets on how soon he'll be calling Metric Mechanics for a rebuild?

You are correct, turbos, superchargers, Dinan chips, nitrous all do one thing - give your engine more power. However, they work in different ways, and some are safer than others. Nitrous is the least safe way of making more power in your engine. This is amplified by the fact that you plan on adding nitrous to engine with no other modifications. I had a turbo kit for my car at one point, and high hopes of installing it and having a pretty badass car. But after talking to my mechanics and looking at the list of things that would need to be done to get it working, I bagged the idea. I would've needed a new head gasket, possibly lower-compression pistons, all sorts of oil taps in the block, yadda yadda. A few thousand dollars worth of work. And the turbo probably would've given me about 75-100 boost, depending on the amount of boost I wanted to run through it. Do you honestly think that you can just hook nitrous up to your engine with a $500 kit, and get the same results with no extra work? You're kidding yourself.

But please do tell us how it goes, I'm sure it'll be good for a chuckle.

Well, I'm going to do it, I'll let you know how it goes.

I didn't hear any hands on experience just typical Nitrous babble that its "bad" for your engine. Yes if not done properly or if brought to extremes. Turbos, superchargers and even Dinan chips all do the same thing in different ways--there's no trick to adding hp. They enable you to add more o2 and fuel to the cylinders which increases hp. This increases heat and strain, that's what hp is. I think its a little ironic that by advancing the timing with a chip and adding 30 hp more fuel is fine for the engine, but adding 75hp is going to "severely" shorten the life of it. I may be wrong but I find it unlikly a big 8cyl engine can't handle 75 hp more. Nitrous is no different than any other hp increase--you get more fuel and o2 into the cylinder and likewise, it has the same fall backs in engine wear that any hp increase has. I've yet to hear a plausable argument why the nitrous increase in hp is any worse than any of the other hp increase options. It's my belief that the nightmare Nitrous experiences come from adding hp limits above what the engine can take.

I'll be the geinea (sp) pig and see and report the real results. Hope I'm right! My 2 cents.


How many hp did he increase with the Nitrous? If it was 75hp or less, I am definately concerned, and it is very good info to know. If he boosted 150 or more than I can see why he blew the engine. If you could get me that info, it would be great, thanks!

p.s. my mechanic advided against it but did add the 75hp was not too aggressive and I would "probably" be fine. 100 hp and over was defintely not suggested.

You should speak with a BMW mechanic before doing this. A friend of mine, despite warnings, did it and blew the motor on his car (a BMW 530). If you want to keep your car, this is the least desirable method of improving performance. Cheap horsepower often comes at the expense of mechanical reliability.

The other posts have adequately explained the drawbacks to nitrous. Makes perfect sense when you think about it. The pistons of an engine, together with the valvetrain and other internals and the rest of the drivetrain, are designed very carefully to provide a certain amount of power and to withstand the forces created by the engine in creating such power. When you change one of the variables in the motor, i.e., the force of combustion, without adjusting the others, you are more than likely to, at the least, severly shorten the service life of the motor (more wear on valves, pistons, rings, etc.) and at the worst, blow the engine entirely. Plus the fact that nitrous is not safe in the event of a severe accident. To be totally honest with you, I would not even do business with a place that sells the stuff unless they sold it only for non-street racing applications. In any other situation, in my honest opinion, selling the stuff is irresponsible because it is dangerous and unsuitable for street applications.

Follow Ups:

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk. Logo © 1997 - 2018 Jump Internet Inc. All rights reserved.