Sohc Nitrous!!!

[PACT Man]

What is the highest shot of nitrous that a stock SOHC will take? I mean as in what would you think/know due to experience.

[93 saturn sl2]

What is the highest shot of nitrous that a stock SOHC will take? I mean as in what would you think/know due to experience.


I know one guy on TSN is running a 75 shop with the stock internals.

[PlasticCarsRock]

Personally, I wouldn't risk more than 50, to be safe. It may handle 75, but I'd rather be slow than risk destroying my engine.
I expect that you could get much better results with the nitrous oxide with a DOHC engine. If I were you, first, I would get DOHC (or at least the head), then worry about the nitrous.

[PACT Man]

75 is good but I'm hoping someone will say at least 150...:dizzy:

[RalliArt16]

75 is good but I'm hoping someone will say at least 150...:dizzy:

umm yea.. 150 is a lot even the the guys running forged internals..

[96 saturn]

150 would make for an interesting sound on a stock engine:yes:

[PACT Man]

150 would make for an interesting sound on a stock engine:yes:

Now your thinking. Haven't you always wished you could just get a new car and then your old one just do everything you have always wanted to but never did because you couldn't afford to not have a car to drive. Well, one of my things is to just strap as much nitrous as possible and just see how much of a difference it would making when driving. Just to feel that sensation. I think it would be funny seeing a stock SOHC just flying by spraying. Or just think how funny it would look to everyone else at the drag strip when a 100hp car goes zipping down the track at a un100hp like quickness. Also along with that is to jump the car and to sit there and just burn out and wheel hop until the diff pin just shoots out of the tranny.

I'm pretty sure that any stock engine should be able to at least take a 65 shot.

[getz999]

I ran 75 on my auto 01 SOHC

If you run colder plugs and high octane fuel you can do a 75 shot all day and all night with no worries

It makes the SOCK power a little funner, but its still slow

My 01 SC2 is barely slower bone stock

[getz999]

If I were you, first, I would get DOHC (or at least the head), then worry about the nitrous.

The blocks will hold up just fine, the head is the last thing you need to worry about aside from the gasket

Any SOHC 00+ has the same block as a DOCH, and even pre 00 SOHC's can take the beating

[944obscene]

Kinda makes me wanna spray my motor after all the franken work is done. Spray for slowness... get it all out. I am considering cryo treatment on some of the parts. Aside from expenses, I wouldn't need a turbo. I'd give my buddy with his RL a fun suprise even if I didn't beat him:

"Oh, man I lost. I must have missed a shift, so lets do that again... *whisper* nitrous on...:D "

How much is is to refill a decent sized bottle? I don't plan on getting some huge Nitrous drum to fill my trunk or anything. Just something for a day of fun at the drags or at Hallett racetrack. Do they allow nitrous on the circuit tracks, or is it league specific?

Oh, yeah... How well do our engines breathe with upwards of 50 shot on them? I figure cam profiles would have alot to do with the power one could see. I wouldn't want turbo/nitrous cams just to have fun.

[getz999]

10 lb bottle here is like 40-50 bucks, translates into 10 bucks a pound roughly

Just buy a kit, some colder plugs, and a wideband and you will be good to go!

[Gerry Proctor]

There is a point at which nitrous stalls in the intake and the engine just won't take any more. All engines are different, but once you start over the 50-percent power increase level, the engine has trouble taking it all in. You also need the fuel system volume for a big load of nitrous. You can probably get by with a 50hp shot (which is a 50-percent increase in your case) with a fuel system in good shape and paying attention to the nitrous tuneup.

The really amazing thing about adding power is the ability for the power to help you find weak links. The engine will probably hold up under a 50hp shot, but you may find the clutch, trans, and differential, and halfshafts a bit underengineered or worn for the torque increase. But it depends on how you apply the nitrous shot. An intelligent controller that controls the shot time and volume based upon rpm, throttle position, rpm, and time are the better systems.

[itsmesillybubba]

75 is good but I'm hoping someone will say at least 150...:dizzy:


Do it...I dare ya

[getz999]

Yea forgot to mention the TPS and window switch...getting those can save a motor

The trans is good for like 220whp

Anything at or over that and youll feel the clutch start slippin bad

Its the diff you have to worry about, too many burnouts or chirps in 3rd gear can send it flyin

[PACT Man]

When I do get a new car I do plan on hooking up a 150 shot most likely, and most kits now come with the full throttle switch and I don't know if I would be spraying from a stop at first. My clutch I'm not worried about, it already slips if I try to powershift and my tranny has been making noise for awhile like my diff pin is probably already at least partially messed up, but then again doing this is with the knowing that it won't be driven afterwards. That's why if the diff pin didn't shoot out during that, I would just sit there and roast my tires until it shots out the side or I won't be happy.:D

I jsut watched a video of a 1990 Caravan take a 75 shot, so I guess that should show enough that maybe almost any car could take that much.

[Gerry Proctor]

Ha, ha. A 150 hp shot? More than a 100-percent power increase? You can't put that much nitrous into the manifold. The nitrous expands when it goes from a liquid to a gas and your manifold won't hold that much volume even at peak rpm. The gas starts backing up and out the throttle body. It's also common during this phenomenon for you to experience an intake explosion. Keep the kids away. Of course, a purpose-built race engine is another story, but you are really just building a bomb.

[Tatusmi]

remedys blew up his built (forged internals) 3rd gen SOHC on nitrous... but he was running 50 and 75 shots fine before he got a bad tank of juice. the shop filled it with the wrong grade stuff and just blew the motor to pieces. we're talkin total destruction of the motor... forged pistions w/ pieces missing and valves fused to the head.

75 is the absolute most I would risk running through the motor... even with a 75 shot and a beefed up 4-puck clutch, it would still slip the piss out of it when he fired.

- Tatusmi

[PACT Man]

Man, I just need a DOHC, all of my cars have all been SOHC(all 2 that I've owned:p). My last SOHC was a Civic though.