Nitrous question

911Blast · 08-10-2007, 06:57 PM

I'm wanting more torque and have lately been headed down the nitrous road.

I have a '79 3.0 SC with low mileage (76,000 M). There are several "dry" systems out there, but I want a wet (fuel added while on) system. Don't want a lean condition at high revs.

I am located in the assh*le of the world known as Louisiana. I am willing to take my car anywhere in this miserable state, or east Texas or Mississippi.

Is there any "kit" or "installation garage" that I can access? Any help would be greatly appreciated from my Pelican Brothers.

JB

ManaMan · 08-10-2007, 07:22 PM

How big of a shot? 100hp-200hp...look at summit or jegs racing for a wet system. A twin turbo setup would be more fun....

masraum · 08-10-2007, 07:23 PM

I think you are going to be SOL. Not much in the way of Nitrous for 911s. I think there are some reasons for it based on the engine, but I'm not sure what. I suspect most of what you'll get will be "SSI's and muffler", "cams and carbs", or strip a bunch of weight out. Depending upon where you are in LA, I suspect you may not have emissions inspection, right? In that case the SSI and muffler may be a good option. Also, the car diet is always a good thing for a sports car.

One last question, are you redlining the thing? I ask because nitrous is often thought of by folks that are used to muscle cars, and folks used to low revving engines. If you want to get the most from your 3.0, you need to rev the thing up. You may already do that, and it's just not powerful enough.

It's a 911, the engine is already pretty highly tuned. If you want to make much more power be ready to spend much more money.

There's no cheap and easy 20hp, 40hp, 50hp mods for a 911.

Patton · 08-10-2007, 09:21 PM

Quote:

Originally Posted by 911Blast

I want a wet (fuel added while on) system. Don't want a lean condition at high revs.

Is there any "kit" or "installation garage" that I can access? Any help would be greatly appreciated from my Pelican Brothers.

JB

http://splitsec.com/
Chech out the acrc 2 A. used in conjunction with the ARM1/ARM1-5.0 . I have been running this application for a couple of years and and am very pleased.

EarlyPorsche · 08-10-2007, 09:30 PM

Nitrous is not very 911esque. Very nuevo rich. A 911 is about history and maintaining that. Much like a Patek Phillip watch, it is something to maintain and pass down. There are many do's and don'ts much like a fraternity. I would say that there are many "chic" things to do to a 911 and NOS is not one of them. Why not go with cams, its an easy installation and makes the biggest difference. You could install cams and a chip and should be at a much nicer torque curve.

911nut · 911nut's Garage

Quote:

Originally Posted by EarlyPorsche

You could install cams and a chip and should be at a much nicer torque curve.

EarlyPorsche, there's no "chip" in an SC. What JB could do is set his idle CO to 3% and get a little more torque.

JB, looks like you want more power than "cams, SSI's and muffler" are going to give you. Problem is that the hang-on mods for a 3.0 are much better at getting weight out of your wallet than a bang for the buck.
I don't recall seeing anyone who engineered a nitrous system for their 911 here on the board.
Cheapest solution is to sell the SC and buy a 930.
There's a nice 3.6 conversion up for sale in the classifieds.
IMO, there are no "cheap" solutions to having a fast 911, that's for sure.

jess p · 08-11-2007, 10:39 AM

There is a dry nitrous setup that simply attaches to the air intake. Dry
setup is safe for about 40-50 extra HP. If you go much beyond that
say 200+ you need to be concerned about rod failure. For a 100 shot
wet setup you will need to remove your airbox and install it there.

Patton · 03:03 AM

Screw history. A Mustang is may be worth keeping stock. Rod it out!

scottb · 08-11-2007, 03:50 PM

Quote:

Originally Posted by EarlyPorsche

Nitrous is not very 911esque. Very nuevo rich. A 911 is about history and maintaining that. Much like a Patek Phillip watch, it is something to maintain and pass down.

Well said, Early Porsche. Some people just don't get it.

futuresoptions · 08-11-2007, 04:37 PM

I would think that you could get the same effect by throwing some hand grenades into the engine compartment..... I think that the earlier idea of adding a turbo or two to the vehicle would be the way to go.... in addition remove the CIS and install a Megasquirt type fuel system. Would probably make that high dollar engine last a little longer and there would be no issue of having to get tanks refilled etc......

911Blast · 08-11-2007, 05:48 PM

C'mon... I didn't mean to stir the Porsche Etiquette police on this one. If you had read my initial post, I pointed out that I am in Southwest Louisiana. I own the only 911 in town. Some old antique, I'd guess mid seventies in age, is driving a mundane silver 996.

I am driving a Grand Prix white 3.0 Targa that is FULLY RS modified, sporting Gotti's and a fiberglass tail that is insulting. I have not put the top on...nor have I been able to locate it in months. I just don't care anymore.

If you check my previous posts, you'll see that I hold the record for twin-turbo, nitrous injected, 388 Chevy Renegade-kitted engine into a 911. Look at the pics, they speak 1,300 plus horses.

I live in nowhere Louisiana and want to drive a little faster. I speak Portuguese and Russian. My farts are chic in this armpit of the world.

I think I'll just go with the "dry" system. Mustangs don't drive as well over 140 as my little targa.

JB

futuresoptions · 08-11-2007, 06:14 PM

Well, I am far from the Chic police LOL, But if you didn't really care about the longevity of the motor and just wanted to add the nitrous, I would bet that there are probably several shops in the Houston area that could handle it..... I don't know of any personally but maybe someone from that area my sign on and give some info......

Evans, Marv · 08-11-2007, 06:39 PM

If you must do this. I hate to say this, but I may have the nitrous system you are looking for. It's a system I bought used maybe 8 or more years ago and stored away. I bought it thinking I'd like to put it on an engine some day for the fun of it. It's boxed up except for the bottles (which are separate from the box). From what I remember from the guy I bought it from, it came off of a 2.8L racing engine. It's an NOS (brand) system with 2 bottles, the Porsche intake manifold with the installed plumbing to deliver the extra fuel. If I remember correctly, it has a set of jets for delivery for different horsepower. It also have a manual or some kind of book with it. It's an almost complete system - maybe complete. I paid quite a bit for it at the time, although I don't remember exactly what. I'd consider parting with it for $1K plus shipping if your're serious about this. PM me if you want.

brendon · brendon's Garage

I had nitrous on a car once. I added up the $ spent on refilling the bottle over the course of a year and it was as much as the supercharger kit I ended up putting on instead.

I would never do nitrous again, but that's just my opinion.

911Blast · 08-11-2007, 08:15 PM

OK...I'm game - where can I buy the "Supercharger kit" and how much $$$ do I need to cough up?

JB

masraum · 08-11-2007, 10:11 PM

There is a place called Superchargers of Knoxville if I remember correctly that does Porsche supercharger kits. There is another company too, but I dont remember the name.

jester911 · jester911's Garage

I think I heard Superchargers of Knoxville went under. I tried searching for them to no avail.

84porsche9113.2 · 08-13-2007, 01:20 AM

Some of the kits (at least the one I tried) are pretty much "universal" in application in that all you need is a nitrous source (bottle) and a source to tap fuel from for the wet system. A while back I "experimented" with a 50 shot wet kit. It worked, but it was just a hassle to fill the bottle. It's cheap speed and I guess I was caught up in all the hype in the movies and wanted to see if it worked. I just installed it for track use (1/4 mile times - again, I know, not 911-esque), and since it's not legal for street use like I said I just removed it and it is now just gathering dust.

Best part about it is no one really knew I had it, and it was easily removable, and also low cost (unlike a supercharger or turbo). I think at the time I only spent maybe $300 to $400 on the kit and accesesories. And I probalby only filled the bottle 3 times max (it was a short experiment). Anyway, I priced superchargers and I think it was some ridiculous number like $6k to $8k (maybe even $10k?) and to me, spending less than $500 just to experiement with the added hp was an experience.

I think spending that kind of $$$$$$$$$$ on a supercharger would justify selling your car and just buying a factory turbo instead. I'd say anything turbo that comes from the factory is probably a lot better built than trying to slap one on after the fact.

I always want more power but I'm too attached to my car now to sell it for a turbo even if it means more power. I think if I had to do it all again, I probably would've made my 1st 911 a turbo and held out for a good one.

Would I do it again? Probably not, but curiosity got the best of me and I wouldn't have found out what it was like if I hadn't tried it. I think the problem is that it is only temporary and can only last as long as you still have gas in the bottle. It may not be porche-esque, but it's no longer on my car, so as far as I'm concerned, it's only a skeleton in the closet now....

911Blast · 08-16-2007, 06:38 PM

OK... There were a few nice replies on this thread and, after much consideration, I am buying a Holley NOS "dry system" and modifying my manifold for extra fuel. I'm kinda handy with that kind of work.

However, the "turbo" referrals (just because they were added by the Porsche factory in the mid-seventies) reeked of elitist conformity. A lot of talk, but dead end, at best.

Other "purist" comments were just ignorant.

My 911 is a great car - designed for the masses and mass sales. I paid for it and I own it.

If I want to make changes to it that make my short life more fun - I'll do so.

Long live Wayne! Drive it like you mean it!

HarryD · 08-16-2007, 07:58 PM

JB,

Fun thread.

You car, your choice.

I would be concerned about what Nitrous does to the head temperatures etc. Unlike water cooled cars, the head can get very hot and heat management is a serious issue. Especially since a rebuild is north of $10k. I would talk woith some speed shops about what effect Nitrous has on head temperatures to be sure you have a way to mamage the heat. You may need an additional external oil cooler to help keep the temps down.

Also, you may want to look at beefing up your transmission to hadle the shock of the additional power. They can be pricey to get rebuilt as well.

Have fun.