NITROUS

steve71super · Post by **steve71super** » Wed Sep 12, 2001 12:27 pm

Is anybody out there running nitrous?If you are,would you please let me know your basic set up(carbs,heads,displacement,how much nos,cam).thanks,steve

Searoy · Post by **Searoy** » Wed Sep 12, 2001 1:52 pm

I'm about this >< close to putting nitrous on my '66. I've got a Progressive that runs pretty rich when both barrels open, so I figured I can add a 25-40 shot of nitrous switched to fire at full throttle and 2500+ rpm (right where the secondary main jet picks up and it gets REALLY rich). It would be a dry system, firing only nitrous into the plenum under the carb. I can get away with this because of the rich running carb, other wise i'd need a wet system, firing nitrous and fuel together. A 40 shot ought to really be a kick in the pants. I doubt I can go bigger than that safely.

------------------
*** Teach a Man to Fish ***
Searoy

Locash Mike · Post by **Locash Mike** » Wed Sep 12, 2001 7:41 pm

Check out what happened to Lester's engine at www.locashracing.org

That was done with a 50 shot and a seemingly perfectly engineered system, we think that a clogged fuel jet was the culprit.

------------------
Locash Mike
www.locashracing.org

fastfood · Post by **fastfood** » Thu Sep 13, 2001 10:19 am

Aw, cmon now Mike, even Lester admitted it had to be something freak to cause it. How long had he been running NOS? I ran it for a couple of years and never had a problem. A lot of people do. I was able to knock 1.4 seconds off 1/4 mile times with 125 HP fogger kit. I love that stuff, wether I'm at the dentist or at the track!

Searoy · Post by **Searoy** » Thu Sep 13, 2001 12:26 pm

What I know about why nitrous engines die are simple.

Either you used a bad/cheap part, or you failed to perform proper maintenance.

Cheap parts fail. Sometimes even good parts are defective and fail, but cheap parts are more likely to fail. Depending on what it is that fails it can cost a little time or a lot of money.

If you have a high performance part and don't do more maintenance/checking on it than a stock part you are asking for trouble.

I'm not asking for 5G launched or sub 10 second quarter miles. I want a "merge with traffic" button, a "fun" button. A 40 shot of nitrous dry into an already rich progressive is simple enough to have very little go wrong. If the nitrous solenoid fails I don't blow upthe engine, I just bog down. If I don't rev high enough the nitrous never triggers. If I don't floor it the nitrous never triggers. If I turn the system off the nitrous never triggers.

Simple is good. YOu don't get a lot of extra power, but a little can go a long way.

------------------
*** Teach a Man to Fish ***
Searoy

Locash Mike · Post by **Locash Mike** » Thu Sep 13, 2001 8:06 pm

FF: My point was that nawwwsss is very unforgiving when something goes wrong, that was his only failure in three years of running.

------------------
Locash Mike
www.locashracing.org

briansbug · Post by **briansbug** » Thu Sep 13, 2001 10:38 pm

searoy, be carefull!!! a dry system does't sound good to me. i bet 90% of nos engine failures are due to a LEAN condition. i realize your carb is rich now, but how rich? enough to suport another 40 ponies. from my experience when the juice runs out on a wet system there is enough fuel to normaly foul the plugs badly. i would say get the carb tuned in and run a wet system. but this is just my opinion.

------------------
power is an addiction

JohnConnolly · Post by **JohnConnolly** » Thu Sep 13, 2001 10:55 pm

Nothing wrong with Nitrous, IF done properly. A friend of mine stuck a 100hp fogger shot on his STOCK 1600, and flogged it for a while. There's a hilarious picture of it at callook.org.

it wasn't a problem until he did a 150hp fogger shot on the SAME ENGINE (crank on street).

Searoy · Post by **Searoy** » Fri Sep 14, 2001 9:52 am

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by briansbug:
<B>searoy, be carefull!!! a dry system does't sound good to me. i bet 90% of nos engine failures are due to a LEAN condition. i realize your carb is rich now, but how rich? enough to suport another 40 ponies. from my experience when the juice runs out on a wet system there is enough fuel to normaly foul the plugs badly. i would say get the carb tuned in and run a wet system. but this is just my opinion.

</B><HR></BLOCKQUOTE>

Understood. I agree that a properly tuned carb boosted by a wet system may be an overall better solution, but not necessarily, especially at low power. I've run the engine about 5 minutes on the stand. If the plugs are very fouled at all (no load) I'll know I have enough to justify a nitrous setup of some kind.

My carb is not incredibly rich through the primariy, especially though the idle jet, although it is some. When the secondary get kicking it's pretty thick, and more so once both main jets come in. Maybe it wouldn't support another 40 ponies. My brain says try a 25 shot first. See if it dies. If it's still awefully rich step up 5 shot at a time. My gut says go big or go home, try the 40.

Of course I probably won't keep it that long. The car is already for sale. I just want to get it sold really, and not take too big of a loss. If adding a NOS hide-away dry shot for 25 ponies does it, it's money well spent.

Besides, it's fun too, and easier than routing in a turbo.

------------------
*** Teach a Man to Fish ***
Searoy

fastfood · Post by **fastfood** » Fri Sep 14, 2001 10:39 am

Thanks, Mike. I wasn't bustin chops, just wondering. naawwwsss Too funny. Sounds as funny as a fast Honda!

------------------
Rice, it's what's for dinner!!!

Lo cash lester · Post by **Lo cash lester** » Sat Sep 15, 2001 6:51 pm

Lester here, just want to clear the record. My car (motor, trans, NOS system ect.ect) is made of only quality parts. At the present time I'm not sure what went wrong. I haven't had time to do a complete check on the fuel/NOS system. I love NOS and would recomend it to anyone, providing they are doing it right. Anyone thinking they can get 40 horses from a "dry" system is sadly mistaken and going to be on aircooled.net getting new engine parts soon after hitting the switch. My system running "wet" at 50hp had the fuel pressure set at 6psi(seperate system for carbs and NOS). Just about any fuel system on an aircooled VW is running no higher than 4psi(48 IDA's may run up to 6psi depending on the motor combo). Without a regulator for the fuel on an NOS sytem there is no way to be sure you have constant pressure. That's when the BOOM happens. Nitrous works because it is 33.3 percent LIQUID oxygen. The air we breath is only 14.7 percent oxygen. Thus, the more dense oxygen you can FORCE in = the more fuel that can be added. Remember NOS HAS NO REGULATION. It runs at different pressures according to atomosphereic conditions. When I race in the dead of summer(Florida) I use a towel that is kept wet from the ice cooler to keep the bottle pressure under 1100psi. In the winter most people use a bottle warmer to keep the pressure up to 900psi.

I will be back on the juice as soon as I build a new motor. I have run NOS from day 1 on my race car(3 1/2 years) and this is the first problem encountered. It got an 1835cc motor built out of used(quality) parts running low 7.20's@95mph until I could get the parts together for the 2275.About the problems I've encountered, THAT'S RACING! If anyone has questions about NOS please email me at: [email protected]. Watch out, the SSG will be terrorizing the streets soon! Later

John Kelly · Post by **John Kelly** » Sun Sep 16, 2001 4:11 pm

Hi Searoy,

Although far from an expert on nitrous, I have used it in an aircooled motor. I would suggest not using it until 4000 rpms, and then only briefly, if you plan to run it dry. The lower the rpm, the denser the the shot, and the higher the pressure. Good luck!

Cheers, John www.ghiaspecialties.com

Lo Cash John · Post by **Lo Cash John** » Sun Sep 16, 2001 5:45 pm

Searoy...Do whatever floats your boat, but PLEASE take pictures of the first (and only!!!) test run with this setup!! You'll want something to look back on and laugh!! If they're really good, post 'em here.

[This message has been edited by Lo Cash John (edited 09-16-2001).]

sniper48 · Post by **sniper48** » Sun Sep 16, 2001 7:32 pm

Lets not forget that each and every engine is different. The cam and heads as someone said before is the limiter on a stock engine...hence applying NO2 at 4000 when it should be topping out at 4200 or so. Then you have your all-out race engine that screams up to 9000 or even 10,000 big ones. It all depends on the system...lets not even got into what fuel system their using. Just a thought.

fastfood · Post by **fastfood** » Mon Sep 17, 2001 7:24 am

Lester I agree, quality parts and having done it for 3 1/2 years, it had to be a MAJOR fluke for something to have happened. When I get the chance, NOS will be back under my finger. Or naaaaawwwwwssss as the rice children like to call it. naaaaaawwwwsss - too damn funny. Makes me laugh fast and furiously. I slay myself.

------------------
Rice, it's what's for dinner!!!