Why not NOS?

[j.fro]

NOS on the Boxster would be a lot more than $500. For around $500, most of the kits are plate or fogger systems to be used with wet intake manifolds (ie, carburetors). This is what you see on Chevys and Fords. It's a plate sandwiched between the carb and the intake. It's plumbed with the nitrous and fuel, which usually has it's own dedicated fuel pump. During combustion, things get hot enough to release the extra O2 molecules from the nitrous. The extra fuel helps to slow the burn and cool things down. Without the extra fuel, things get lean and temperatures skyrocket. The problem with the Boxster (and most modern cars) is that we've got fuel injection with a dry manifold. You can't just put a plate in after the throttle body. To add nitrous, you would have to put nitrous injectors and solenoids in each intake runner as close to the fuel injectors as possible. Then, you would need to either enlarge each of the injectors to flow enough fuel to get the correct ratio with the nitrous (likely resulting in a very rich condition when the nitrous is not flowing), or you would need to add another set of dedicated fuel injectors to work with the nitrous, which would make for some very crowded intake runners. Along with the injectors, you would probably need to plumb a dedicated fuel line and add a fuel pump. The stock system would not be able to handle the added load. To top things off, you would need to reprogram the ECU to, at the very least, retard timing during the nitrous application. Whew!!

And with all of that said and done, the only place you'd be allowed to do any competition would be the drag strip. PCA and SCCA prohibit use of nitrous in all classes, as do most other AX/track organizations. The folks at he drag strip would be happy to take your cash, being that lots of those cars are in the 1000+ HP range. I used to have a 71 Camaro (no nitrous, but I've worked with others who had it). It was like getting shot out of a cannon.

[Rick V]

Simply think s Nitrous as liquid forced induction. Would you add a turbo, or a supercharger to your car? If the answer is no, then there you go. As for the $500 system, go for it. I make very good money cleaning up after the people who like to cut corners. A proper system with the correct DME reprogramming would be ok but when you start dropping $$$$$ on bottle refills you will come to realize that it isn't cheep.
We, just for kicks installed a 250 shot on my sons Eagle Tallon, (it was on it's last legs anyway) Man that was a fun 150 miles.
The car is yours, the choice is yours, the results are yours too. I wouldn't do it to my car, but that is just me, and I would be staying in the "nause" cause I am a speed freak.

[Brucelee]

I suggest you peruse the IMS posts on this board. Given that their is a structural flaw that allows engines to greanade, personally, I would be loathe to experiment with MY engine.

Of course, we are happy to have you try it and report back.

Good luck and go with God.

[dmcutter]

I have no intention of being a guinea pig. Since the car has been out, what, 11 years, I thought somewhere someone must have given that idea some thought and I wanted to know the nuts and bolts of why it couldn't be done. I figured $500 was overly optimistic because nothing can be done cheaply to a P car. The key, as many have pointed out, is a properly designed system and it doesn't look like there is such an animal available off the shelf. I would prefer a turbo because I know that's been done and it would be usable on a daily basis.

[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?