Why not NOS?

[RandallNeighbour]

http://www.andysautosport.com/porsche/1997_2004_boxster/performance/nitrous_oxide/nitrous_oxide_kits/nos/

I'd prefer a turbo too. It's just 10x more $$$. However, it's under your right foot any time you want it and there's no bottle to refill.

[jay3000]

Originally Posted by RandallNeighbour

http://www.andysautosport.com/porsche/1997_2004_boxster/performance/nitrous_oxide/nitrous_oxide_kits/nos/

I'd prefer a turbo too. It's just 10x more $$$. However, it's under your right foot any time you want it and there's no bottle to refill.

Well. Looks like you've found your kit. The questions now are, where do you put the fogger? Where do you get a TPS signal? Where do you mount the bottle? Etc..

Surely this motor can support a 75HP shot. ( a honda civic can) If the bottom end can support 75 HP from a turbo or SC then this would be no different. The cool thing about EFI is that if the jets for the nitrous are slightly rich or lean the system will make up the difference in a matter of milliseconds. Another cool thing is that the engine likely has a knock sensor and can retard the timing if that should prove to be an issue.

[Brucelee]

Originally Posted by jay3000

Well. Looks like you've found your kit. The questions now are, where do you put the fogger? Where do you get a TPS signal? Where do you mount the bottle? Etc..

Surely this motor can support a 75HP shot. ( a honda civic can) If the bottom end can support 75 HP from a turbo or SC then this would be no different. The cool thing about EFI is that if the jets for the nitrous are slightly rich or lean the system will make up the difference in a matter of milliseconds. Another cool thing is that the engine likely has a knock sensor and can retard the timing if that should prove to be an issue.

You seem certain that the Box can deal with the NOS hit. I am curious as to why you believe this?

[jay3000]

Originally Posted by Brucelee

You seem certain that the Box can deal with the NOS hit. I am curious as to why you believe this?

Can the bottom end handle 75 HP from a turbo or supercharger?? What would the difference be???

[Brucelee]

Originally Posted by jay3000

Can the bottom end handle 75 HP from a turbo or supercharger?? What would the difference be???

It seems the IMS is the weak link in the Box engine. How might that be effected by a boost from either a Turbo or NOS.

It is interesting that Porsche has never offered up a Turbo on the Box. This is kind of out of character for them, as they have put them on many past models.

That could be coincidence or not. I guess I never thought of that before?

[angman]

More pictures wanted from Tool Pants!

[fragdude]

Originally Posted by Brucelee

It seems the IMS is the weak link in the Box engine. How might that be effected by a boost from either a Turbo or NOS.

It is interesting that Porsche has never offered up a Turbo on the Box. This is kind of out of character for them, as they have put them on many past models.

That could be coincidence or not. I guess I never thought of that before?

Putting a turbo on the Box would put the Box in 911 territory which is a big no-no cause when the guys who pay the big bucks for a 911 realize that a Boxster can be faster than them they will get kinda mad. This is also the reason why our engines are so muffled.

and on the above picture: I want to know what kinda shift kit that guy has!

[skip_168]

Originally Posted by jay3000

Can the bottom end handle 75 HP from a turbo or supercharger?? What would the difference be???

ok, well here is the deal..

A turbo or supercharger takes air,(19% oxygen), and compresses it.. The fuel injection system can keep the air/fuel ratio at about 14.7 to 1 even with the extra oxygen & air from the turbo or supercharger.

With NOS, you are injecting liquid Nitrous Oxide into the engine, about 200 times more oxygen than the fuel ingection system can handle. If left to it's self, this would lean out the mixture & act like a blow torch and melt down a cylinder head.. this is why a NOS system has an additional fuel nozzle with the NOS nozzle.

Here is the real problem: getting the mixture right

I know the companies who make the systems say its all good, but if you are off on the mixture by even a little bit, your 10k boxster engine will turn into a boat anchor in about 25 seconds...

Now back in the day when I was building air cooled Porsche engines, NOS was a BIG NO NO.. just due to the fact that the extra HP brought along with it alot of extra heat that an air cooled engine could not get rid of fast enough..

[944boy]

The biggest problem is the F&F ruined the reputation of Nitrous. But this is not a limited discussion. The 944 line has been out for 26 years and adding nitrous brings up the same kind of debate. There are some very sophisticated systems now that plug into the OBDII and meter based on injector duty, RPM and so forth. A well done system has no more risk than any other bolt on mod. It will be cheaper initially but you do have to refill the tank. is it worth it? Thats your own decision. I am sure people have added nitrous, I have heard of it on other boards. If you are interested I would do the research with nitrous guys, they may tell you its not worth it for your car. But I would inquire with someone who is neither selling a product, or bent on maintaining a strictly OEM car.

Just my .02 while sitting in an airport at 5am.

[dmcutter]

While researching something else recently, I think it was 3.6 swaps, I recall seeing and IMS upgrade/replacement or something such as that on a site. If the IMS is the weak link since they changed the design, can shaft bearings be replaced/upgraded to handle additional power?