ok i heard that nitrous is good casue of this, and that, and that f/i is bad couse of this and that. Now i read around alittle and nitrous is better, becasue it drops cylinder temperature and the charge is more dense, also it gives better power under the curve, given equal peak powers with an f/i set up, also you can turn the n20 on and off, at will, so it doesnt harm the engine as much as f/i which is on all the time. Now this is where i get confused i heard that nitorus will straight up melt your pistons if you leave it on for more than like 15 secs, and iam alwasy hearing about guys blowing their engines with n20 so how could it be better than f/i then???????


I am planing on going with n20, cause of cost also i have some detonation, and sinse it is a cooler denser charge than f/i it looks like n20 is the way to go, but i need to get some things cleared first.Plus i already got some high comp heads so that leans me more to it (11.1 cr heads)

 

I can answer a few of your questions:
the 15 second thing? where did you hear that? First of all you can leave it on for 15 seconds or even 15 minutes if you had a big enough bottle. But if you can't do a 1/4 mile with nitrous in less than 15 seconds then, you should blow your motor anyway.

In my experience, you do hear of more people damaging their motors with nitrous than blowers. Part of it is hearsay, but the other big thing is that a blower can only add so much horsepower and is not easy to adjust, pulleys, belts, tune etc. A basic nitrous kit can deliver a ton of power if jetted to. Most people run the recomended jetting for a while and like it, then get all caught up in a "big" race and keep jetting up, way past the recomended jetting until they hurt something.
Just my 2 cents

 

Cons are---
Bottle press. going down and refilling
removing timing for Nitrous hurts N/A power
there are many things to watch and control with nos
Pros are---
Cheap power
When you don't want alot of power flip off the switch.


I know some will disagree with me but it's true. I have a BIG block NOS motor and a twin turbo/twin nitrous motor.

And been playing with Nitrous for over 5 years!

 

i read it in an old thread about soem guys racing.

any more thoughts anyone ??

 

Removing timing is what is deterring me away from N20. I want to run strong NA and on the bottle. Some of my friends say if my NA tune is not very advanced, I can run both off the same tune.

Any input on this...?

 

there is a trick to remove timing only when on the bottle. using a resister.

 

WELL REMOVING TIMING AINT ALWAYS ALL THAT BAD
oops sorry bout teh caps

 

Most people who run N2O on stock ls1's don't even pull any timing out, especially if you are spraying less than 100hp shot. If you are running more than a 100hp shot then get a timing controller or try the air intake temp sensor trick, there are pleny of ways to run good on both N2O and your NA tune.

 

can you elaborate on this?

 

My timing is advanced with my Predator tune but I plan on using it to take out some timing only when I'm spraying.

 

IIRC, you put a 1000ohm resistor into the IAT and it fools the PCM into thinking the air temps are cooler causing it to pull timimg.

Do a search for the exact details.

 

Ok good info in this thread, and sorry, I don't mean to hijack it but I think it falls into the "Pros and Cons" theme.

I assumed that removing some timing will affect the NA operation negatively. Lot's to learn for me, and this thread is a big help.

Thanks to the contributors, I'm even going to bookmark this thread for when I put on a 100 Wet Shot (on a H/C/Bolt-Ons motor) this Fall.

 

what he said....



another con is all the **** that scream "cheater" when you outrun them.....

 

It doesn't fool it into thinking it is hotter?

 

One or the other.

I read about it a while back. That's why I said search for teh exact details as my memory on the specifics isn't very clear. I just wanted to give him the basics on what the trick was.

 

it doesnt pull timing it ads timing, by fulling the comp that the air is cold. or maibe thats another one.

 

Removing timing is only needed on high horsepower combinations. 150hp and down just let it ride. (late model stuff)
Blowning up the engines. Vinny was perfect it on this one. People get caught in the moment and raise the power level past were their engine was able to handle. Then the problem bites them in the *** but they blame the nitrous kit, so they do not ribbed by there freinds . I know I've done it.
The great thing about a nitrous set up is simple. Easy install and or removal. Only used at full throttle. You could fill your bottle in December and not use it until late summer. The blower is always moving as long as the car is running. Heat build up, belts, tensioners. Just a lot harder to set up and keep up then a nitrous kit is.
Just my 2 cents.
Ricky

 

Another good and honest response. Ricky, when you say "high horsepower applications" you mean like "150 shot" or "200 shot," etc., right? I'm rolling 413 RWHP NA, and want to bump it up with a 100 wet shot.

'Just wanted to clarify "high horsepower application" to mean a "big shot..."
Thanks.

 

I'm still learning myself but this is what I've read, heard and been told. This is also only for people running 100 or bigger shots, not 50 or 75.
-It is NOT okay to run a 100 or 150 shot on top of a 400rwhp, cam only motor. If you're pushing 400 rwhp from only a cam, then your car IS going to require advanced timing and fuel changes.

-However, it is okay to run a 100 shot on a stock motor, just bolt it on and go. This is because the motor is already a little low on the timing side from the factory.

-Besides pulled timing robbing power, you will also LOOSE power N/A by having to run colder plugs. Instead of a TR-55 gapped at .50-.55. You will have to use a colder plug like a TR-6 and gap it at .35 so the spark won't blow out. Then you have to worry about the plug fouling out from not using the nitrous often enough. So filling the bottle in late December and not using until summer is probably not the best idea. I'm not sure about this but one veteran nitrous user told me he used his nitrous if only for a few seconds at least every week or 300 miles (whichever comes first) to keep his plugs clean. Like I said, I'm not saying I believe in it but he has been using nitrous since I was alive so....
-Another con to nitrous is that it is not maintenance free as someone posted earlier. Many guys on here will check there plugs after every nitrous outing. If you have a fouled plug and you spray for too long, say goodbye to that cylinder, unless it is forged. Fortunately, plugs aren't that hard to check as people say and you can get this done in half an hour after doing it a few times.

If any of this wrong or misleading please correct me. I want to make sure I have my facts straight.
So who here thinks its okay to run a 100 wet shot on top of a 400rwhp N/A motor like mine?

 

High horsepower (anything over 150). I know we have sprayed our test car with 250 no timing retard. But that is not safe. Not recommend and should not be done so do not do it. Unless you have good gas, and your computer can self retard under detination.



Ricky