ivangene

YUP... post the vids of the results..........

maci911

its just the prospect of loading 9k on a SC and 1-2k on install is a killing......my ? would be if a 3.4 can handle the SC which will provide higher compression etc....then with a nitrous system if managed properly and carefully can provide similar results? and might cost only 1-2 k....again i think the key is to have proper management with low "shots" and adding an intake plus headers......again just my theory,but i will be inquiring with some professional shops in this matter in the following weeks....i really hope this can work.

wwest

Why not a bit of PURE OXYGEN to displace 5% of our atmosphere's nitrogen, from a liquid oxygen tank at LOW pressure into the intake downstream of the MAF/IAT....??

5/30 improvement in HP/torque, 350HP rather than 300.

maci911

here you go a 1999 996 with a SC AND A NITROUS SYSTEM.....very interesting...and a BOXTER WITH A 3.4 996 ENGINE NOS
http://www.europeancarweb.com/tuned/...ody/index.html
.......http://www.angelfire.com/va3/ric3boi/box.html

maci911

nice propolsal but is it practical....safe...and tested?

redridge

AudiOn19s

I used to have a 1 bottle per week Nitrous Habit when I drag raced in HS and my college years. Never once had an engine failure in a vehicle that was raced almost weekly for 3 years.

A well designed system with all of the necessary safety features in place is a great alternative to SC systems for reliable HP increases with very little investment

I think the reason you don't see systems like that for Porsche's is becuase it's mainly aimed at the drag racing crowd and our cars are not ideal for that sort of racing. Most of us are using these cars at tracks with turns where the nitrous is of little use if any.

I'm sure anybody who knows their way around a modern nitrous system should be able to put together something for you. The biggest issue is going to be without being able to pull timing from the car you're going to be limited on how much HP you're going to safely be able to add to the car.

Tippy

Ok, this is my view of it. The motor more than likely will handle it but it was probably not designed for it.

I have never seen the ring lands of the M96 to judge if Porsche uses thin ring lands on the pistons and rings for longer rod ratios.

If they do, this weakens the strength of the piston and makes it more risky to have a meltdown (if fuel pressure ever falls off).

On a side note, my '87 911 has very thin rings, I wouldn't think of ever spraying it even though its turboed (but many guys have had broken rings N/A, not a good sign of strength).

If you have a good fuel safety pressure switch and never tamper with the NOS jets, it should be fairly safe IMO.

But, me personally, wouldn't do it due to the complexity and time it takes to rebuild these motors.

My experience with a 75hp shot on my old 'vette was that the diagnosing stage never popped the motor even with lots of shuddering due to leaning out.

Going to 125 or 175 made the engine more violent and after I was done using it for a session, the timing was so retarded that the car lost low-end torque for a few days.

That tells me it was pulling lots of timing to prevent detonation.

Of course we are talking about V8's here, not 6's.

I have a video of my friend who drilled out a 200 hp jet (without matching fuel)and the violent explosion blowing intake parts all over the track. It kinda humbles you and makes you realize this stuff is serious when it blows the head gaskets out from underneath the heads and bends all the connecting rods just by stomping the throttle from off idle.

Tippy

What car did you have it on?

Tippy

Oxygen being the gas that it is might require higher than 93 octane to prevent detonation?

I believe it quickly combusts, the reason it is added to Nitrogen to slow the burn as in NOS.

AudiOn19s

Small block Chevy in an S-10 pickup.

Plate system with progressive controller and all the bells and whistles. I also had an MSD ignition on the thing with manual timing control so I could pull timing from the ignition with a filp of a switch fron the interior of the car. At the end I was running 200hp shot on my motor on the top end of the track. It was a lowered S-10 on a 10" tire that was running deep in the 11's over 12 years ago and it was also my daily driver. Pretty quick street car for the time.

Tippy

Nice!

Was it like 75-150-200 setup? Had one friend with a 275 shot on a 468 BB '69 Camaro and ran 10-teens. It was 11.2 motor alone.

Another friend had a 300 shot on a 383 SB in a '66 roadster 'vette and he ran a best 10.01. He could never crack the 9's.

These were both street cars and DD's. Neither used progressive, all right off the line. Crazy their motors held over the years, pretty sick what power you can get for little money.

Oh sorry, didn't mean to hijack

wwest

I am of the belief that the richer the mixture is the less subject to detonation. Enrich the C-210 mixture just a bit cooler than peak EGT to prevent detonation.

As I see it the ECU EFI controlled mixture ratio would not change, just putting more combustable charge inside each cylinder by displacing some of the ~70% of nitrogen in our atmosphere.

Isn't it true that in theory 100% oxygen into the intake would allow the engine cylinder displacement to be reduced by a factor of 3 or 4... and still produce equal HP...???

Jon996

Hey maci911, While I don't think I will be doing this mod, thanks for initiating a pretty interesting thread!

Meister Fahrer

Yeah, so an iron block that's magnitudes heavier and cheaper than a Porsche.

Sorry, but this thread is interesting and relevant only if the OP is planning to race Chevy's in the 1/4 mile on PINKS.