dry shot

[neg1ohs]

okay i got a oil pressure gauge and then a fuel pressure gauge im going to be spraying a 75dry then up to a 100dry how safe is this on my injectors i got 3.2 injectors and might get a upgraded pump.and what kind of numbers should i get with a stock sho.just want to make sure and i know to get th eautolite spark plugs too.

 

[LJRuddy]

An upgraded pump is a MUST. The injectors are made to withstand ~300hp if i remember correctly. So with a 75shot, you are probably running them 85-95% and with the 100shot, id start looking for a more powerful injector to use. a 75shot will probably net you 30-40hp at the wheels. The 100shot would probably be a good 55-65hp at the wheels. Dont quote me on that though.

 

[93rev2sev]

:cry: From what I've read (never used N2o) the 75 shot will be fun if used sparingly. A hundred shot puts you in "timebomb" mode.

 

[neg1ohs]

An upgraded pump is a MUST. The injectors are made to withstand ~300hp if i remember correctly. So with a 75shot, you are probably running them 85-95% and with the 100shot, id start looking for a more powerful injector to use. a 75shot will probably net you 30-40hp at the wheels. The 100shot would probably be a good 55-65hp at the wheels. Dont quote me on that though.

wow 100 shot and thats what im prolly gonna gain wtf nitrous blows prolly better of going wet then dry.

 

[hawkeye18]

hmm, if you have an MTX and it's been strengthened (shot peened, diff pin welded, whatever), you should be fine. If you have a stock MTX, or an ATX, then a 100 shot is kinda like going to prison and pulling your pants down. You're gonna get it in the end.

 

[SHO Dude]

FWIW, I still have my port injected manifold for sale. Simple bolt-on.

Ran many seasons without hurting the tranny. Clutches, on the other hand are a different story.

Bigger fuel pump, good tuning.

 

[Power Surge]

An upgraded pump is a MUST. The injectors are made to withstand ~300hp if i remember correctly. So with a 75shot, you are probably running them 85-95% and with the 100shot, id start looking for a more powerful injector to use. a 75shot will probably net you 30-40hp at the wheels. The 100shot would probably be a good 55-65hp at the wheels. Dont quote me on that though.

Injectors aren't an issue, because you don't change the duty cycle. Dry systems raise the fuel pressure to add more fuel through the injector at the same puslewidth as without the nitrous.

However, buy jacking up the fuel pressure, you are putting much more strain on the pump, so it would be a good idea to replace the pump with one of a high pressure design.

I am not a fan of dry nitrous setups, I much prefer a wet system. You should still do a pump upgrade though, because it's good to have the extra VOLUME for a wet system.

 

[AREA 91]

All the N20 info you ever wanted to know for a SHo is on here. You just have to search.

ZEX 82011 Kit
Autolite 3923 copper spark plugs (1 heat range colder than stock)
New Fuel Pump

Start out with a SMALL SHOt, and work your way up.
LEAN ="s BOOM!!!!

 

[Power Surge]

One more thing to keep in mind... I have seen this a million times, which is why I will mention it.

A common misconception about nitrous is that the power comes from the nitrous itself. People will often "up" their nitrous jet to get "a little more power" from a setting.

The fact is, the power comes from the fuel. Nitrous is just concentrated oxygen. It has to be mixed properly with the right amount of fuel to make power. Adding more nitrous without adding fuel, is like upping the boost on a blower car and not adjusting the fuel.

Nitrous is safe for a stock motor in small amounts (less than 150 shot on a strong healthy motor), but just like any mods, the tuning is the key. The BEST thing you can do, is to get the car on a dyno and check the A/F on the juice.

 

[AREA 91]

That's one good thing about the stock SHO programming. It's PIG RICH in the upper RPM's. 11:1 AFR

 

[twr]

The fact is, the power comes from the fuel. Nitrous is just concentrated oxygen. It has to be mixed properly with the right amount of fuel to make power. Adding more nitrous without adding fuel, is like upping the boost on a blower car and not adjusting the fuel.

Huh?? That doesn't sound quite right. It comes from both added together. At 500+ degrees the oxygen and nitrogen split. The additional oxygen combines with the additional fuel and presto, additional power. Can't have one without the other, well you could but it wouldn't be pretty.

 

[Power Surge]

Huh?? That doesn't sound quite right. It comes from both added together. At 500+ degrees the oxygen and nitrogen split. The additional oxygen combines with the additional fuel and presto, additional power. Can't have one without the other, well you could but it wouldn't be pretty.

Yes, technically you need both . My point was, fuel ignites, oxygen doesn't. People try to add more nitrous thinking it will net them more power, but you're not adding anything that will increase the power output, you're just making the combustion leaner.

 

[twr]

Ahh, gotcha