Inliners International Forums General Discussion Hi Performance Nitrous Oxide?

I am wondering about using nitrous to make a mild street engine jump when I say jump. I got the idea watching that show where the twin brothers take two teams who build two identical cars and then go drag racing with them.

Anyway, those guys have put nitrous on some engines that had bunches of miles on them, and were nearly stock, and they went like stink.

So, my 250 chev engine will be a long way from stock, but some stuff I am doing with a view toward it being a good driver. I went with a pretty mild cam, and a small two barrel carb, et. It should run around 180-190 horses, and be real strong on the bottom end. So, my question is; do ya think I could get away with setting up a nitrous system on here so that when some smart mouth with his bolt on billet 350 needs to be taught a lesson, I can do the teaching? If so, where would I get a system? all the ones I see for carbureted engines have a plate that goes under the 4 barrel carb. Problem? I'm running my Weber 2 barrel and I am not interested in anything else. How hard would it be two take an off the shelf system and fab up a plate that will work under my carb?

Boo

PS: My engine will be very strong; new mains, new pistons, pushrods, even cam bearings, et.

Try this link:
You don't have to add 300 HP and pave the road with main bearings; you could jsut add 60 - 70hp and get a nice bump!
http://www.dynopower.freeserve.co.uk/nitrous_oxide/

Leif on Oakland

Dear Leif;

The graphs on your link seem to indicate that this all works well above 5,000 RPM for bike engines.

I'm wondering if this would apply to the lower (4500-5800) RPM range on our "old 6s".

Any thoughts there?

John M....

You might have a shot with a wet system; I doubt you would get enough power with a dry system to kill most 350s without hurting your motor. Pistons are another issue with nitrous, so if you do it, check you plugs after the first few times to make sure you do not go too lean.
Also, instead of a plate, why not drill and tap your intake and put multiple nozzles right at the intake ports?

Sounds good Bruce.

Anyone else?

John M.....

Some use Nitrous on big blocks that are definetly not high rpm engines.

As for not spanking a lot of 350s, if all things were equal, that may be true, but most 350s are under 350 hp with an auto tranny, and driven by someone who has never even been on a race track. I have even embarrassed a few with my 2.0 Jetta

i would drill and tap the intake at each runner for a wet shot. that will help with even distribution to the cylinders. you will probably will want to re-jet the carbs a little richer and go to a colder spark plug. make sure the fuel system is up to the task also. what kind of pump do you have? do you run a fuel pressure regulator?

i would get it all set up, and then find a dyno that you could test it on to make sure you don't run lean on the spray.

don't try to shoot too much, or that 350 will be towing you home.

for the type of setup i suggested, something like this kit would work:
http://holley.com/HiOctn/ProdLine/Products/NOS/NOSNS/SprtmnFog.html

05040NOS (A,B) 6-Cylinder (inline) carbureted

I have the 5040 NOS fogger kit on my motor. It works really well. All nos companies have a 2 barrel kits. You just have to look for them on there products list. A genral rule is hitting the nitrous above 3000 rpm. No need for riching the carb. The fuel side of the NOS will do it for you. You will need to take out 2 degrees of timing for every 50 hp added.

DONT WORRY THE INSTRUCTIONS WILL WALK YOU THOUGH IT

Steven

Dear Steve;

That's great, thanks a lot. I've been wondering if it all would work on my 278".

For that last few hundred feet of the 1/4 mile that is.

John M.......

Thanks MightySix --- I think I can use the 5040 with part #12900NOS and it ought to work good. I CAN'T WAIT!!! Ye Hah!!!
Boo

An acquaintance of mine does does a lot of NOS work. We have discussed doing this to my Caddy 261. He has set up several cars and says the trick is to keep your A/F ratio correct. NOS is a gas that has a high oxygen content. When you release it in the intake you need to add more fuel too. NOS works great and does not require any mods to the bottom end. What usually happens with the kits is that most people buy them and don't check the ratios. They usually end up too lean and melting things. Keep us up to date!!!

WAIT................BOO look at other plate system like 5001 is $399.95 in Summit. You dont have to use the 5040 system that cost $650.00 and have parts left over. Most all them system will interchange parts.

Steven

You can also Buy a kit that Plumbs to the top of the Carb.

#3220 }[oooooo]

Well how about "PowerShot" UniversaL kit #05000NOS. It doesn't contain the plate. that's okay since I would have to buy or fab a different one.

I can't find a #3220.

Boo

How about this one: #NOS-05000-20NOS? At Summit it is $325, and it has the large 20# bottle. The injector plate is sold seperately. What think ye?

One other question I have is about activation. I've always seen the switch set up on either the steering wheel or the shift knob. How hard would it be to set the switch up on the throttle linkage so that it comes on at a certain point (say around 3200 rpm,) and then cuts off when you let off the throttle. WHAT A RUSH: 125 HP at the automated flip of a micro switch (Evil Grin)

Boo

They have a kit /Or set up off the throttle But normaly thats is at WOT.

#3220 }[oooooo]

Yea, the #5000NOS is a good way to go. Get 50-75 hp jetting to get your feet wet though :)then go up in hp. The micro switch on the carb is how we install it. The instructions will go though a lot of option with you.

WARNING WARNING WARNING this kind of hp building is habit forming.

Steven

Guys --- This has been an extremely informative thread. Thank you all for all the great input. You gave me enough info to do the research, and I am no longer intimidated by, or mystified by, nitrous oxide. It actualy seems very simple.

However, considering where I am with my truck, and my limited budget, I think I am going to spend my money on suspension, and gearing. I want to swap my 4.11s for a set of 3.42s and install a PowerTrax differential locker. Between that and (very low whisper)some IRS problems, the nitrous will have to wait for next year.

Boo

Boo,

I know this thread is about NOX, but be carefull with a locking differential on wet, crowned roads. I do realise neither ever occurs in NW Oregon, but ;<) anyway, I really had to sneek up on the throttle on my Posi-tractioned Camaro under those conditions or it would try to slide off the road very quickly.

Baldy

I run a fogger system on a 170 cid slant six. Just about 3 seconds quicker in the 1/4 mile on with a 150hp nitrous shot.
http://www.cardomain.com/member_pages/sh...1108_3_full.jpg

i would't run nos directly to each port because it seems that it would be hard to regulate the fuel to nos mixture since the carb in the middle of the manifold. if you were to get a tripple set up way cool! it would be better. i am no expert but it just seems logical to have the two as close as possible to one another. if you are going to the trouble to direct spray why not just inject it? just my 2 cents.

A fogger system, like mine, injects the nitrous and the extra fuel, through the same nozzel in the runner. Each nozzle has two jets, one for fuel, one for nitrous. In my case 12 jets. In most aplications, 75-100hp is perfectly safe, for a stock engine. Just make sure you don't run lean or have too much ign advance. I am running 150hp shot on a 170 inch motor. As far as what the engine see's, that is like runnint a 300hp shot on a 350 inch motor.

So Charlie...
What does the nitroused 66 Cuda run in the 1/4 along w/your 65 turboed Valiant?
Thanks!
Hank

Last time out with the Cuda, it went 13.16 at 97.55 mph, 7200rpm thru the traps. That was a a weight of 3250 lbs. I will admit, I wounded the motor 2 runs later. I think it went lean, and it melted the ground electrode of number 2 and 4 plugs. Also some internal damage, as the compression is down. Haven't had a chance to pull the head. pics here.
http://www.earlycuda.org/members/charlie.htm

I am in the process of redoing the turbo Valiant. Haven't run it since I have been running the Cuda. It would go 13.4's at 104 mph, weight was about 2700 lbs. Hope to have the Valiant running again in 2006. Old pics of Valiant
http://www.1962to1965mopar.ornocar.com/schmid.html

Just digging up an old thread cause im looking at nitrous for my 250 also but weve always run the fuel jets a size bigger if you want to be on the safe side. If you go bigger on fuel and watch your AF ratio then work your way down in fuel size or up in Nitrous till you get what you want. Always better to chance running rich then lean.

I would assume a 75 shot will give a stock 6er a nice kick in the pants?

At one time I had tried the 150-175 hp (smallest jets it came with) (NOS Cheater system)The system was designed for minimun 350 C.I.
Man!!!!!!!!
Just in neutral, 2000 RPM, hit the button,whoa!
I could not believe how quick my 250 revved, like it had no torque converter attached & them some.
Tried it on the street, retarded the timeing, it ran like a freight train easy 11 sec. pass, & it was detonating the whole time. I was like 18-19 yrs old @ the time.
I bought some smaller 50-75 HP jets (according to NOS, seemed like more than that):-)) & it would run mid to high 12's.
W/out NOS my car ran a best of 14.3 @ 2700 ft. alt. track.

I know locally I can come across enough parts to set up a system. I alredy have a MSD box that can pull upto 20deg of timing at the push of a button so I will hopefully be able to control the detonation.

Did you run a plate system?

Yes it was a plate system.

I wonder would a stock fuel pump provide enough pressure/flow to feed a 100shot and a HW 5200? OR Would I be better off stick with the Holley Red I have (its loud though)

I never really check the fuel pressure from a stock mechanical.
I believe NOS wanted 6psi for there nitrous system @ all times.
I would think the stock pump would not provide that (6psi) off of idle or low RPM.
There are billet type fuel pump that are quiet that put out 6 psi. The Holly's (red & blue) are pretty loud.
I know the Mallory billet low presure fuel pumps are quiet until you step up to the higher psi pumps.
I would think the other brands low psi billet pumps would also be quiet.

back when nos started to be used they just put it on and ran it if the motor lasted 2 weekends then just go get another junk yard motor and do it again. no working on the heads changing cams. the mustange and import guys are doing it now.

Oh yeah i know some mustang boys that throw 2 stage fogger systems on stock 5.0 longblock and race them till they blow up

I built a port system for my coupe at Bonneville years ago using NOS nozzles. Starting with 13 to 1 compression I did not see as much additional power as a friend who did it on an 10 to 1 motor. Did gain about 8 MPH.

Nitrous is essentially a blower in a bottle and everything you do for a tune-up for a blower you do for nitrous.

Make sure you have a way to retard your ignition when you push the button. 5 to 7 degrees worked for me. MSD's and others can do this. I also dedicated a separate fuel pump with no regulator.

Took a 20# bottle for each run holding it down for about 2-1/2 miles..Good Luck