Lessk

I'm wondering if the kit that NOS makes for the 3rd gen 5.7 with 100-150 shot is safe on a stock L98 with the typical mods?

How safe, and how reliable will it be after however many uses....

And what changes would you make to have it more reliable and safe for a daily driver?

Todreich

You can use NOS in the stock 5.7. Once. Then you can rebuild it with proper crank, connecting rods, and pistons and really use NOS. :^)

Lessk

Hehe, I had a fealing I'd hear that

The things we do to our cars for the glory of speed!

Todreich

Too true. But the good news is that building a really monster 5.7 is getting cheaper by the day. A NOS equipped streeter will run you about $2500.

mrr23

it is completely safe to use on a stock 5.7. just don't hit it before 2500 and you don't bend or break things. you don't need special parts to use NOS. don't be stupid with it and your motor will last. i'm using all stock internals, cast crank, cast pistons, and stock rods with my 120 shot now. have used 150 in it. but he tires won't hold.

Todreich

Well, that's great but with NOS you have to retard the timing so that you don't get predetonation. If you go with multistage NOs you have to get a control box that will do this for you.
I would gate any NOS set up for my target RPM level and let the comp handle it. Mistakes with NOS make engines, even well buult ones, go boom.
As far as using NOS with a stock set up, go for it. However I must remind you that the engine was neither designed nor assembled with the extra power of NOS in mind.

mrr23

so you retard 1* per 50 is the rule of thumb. big deal. i'm not using any retard at this point. no detonation. use premium fuel and you don't have this problem. stock motors only have at most 9.5:1 compression. if there was a need for this, don't you think NOS would say something about it? they wouldn't sell it if the motor couldn't handle the level it is capable of producing. the computer will take care of the timing via the knock sensor. but if you are that worried about it, then move your base timing back 2*.

mistakes with anything make an engine go boom. build a 500 hp NA motor and abuse it. guess what? it goes boom. i put a 125 kit on my 94 lt1 at about 90k miles. ran probably about 20 bottles through it in 3 months, no problems. put a blower with 9# of boost on it. have it boost to quickly. guess what? boom. you lift the heads off.

don't be a weenie and be scared of power adders. use them as intended and no problems will occur. if you have underlying problems now. any power adder (including cams, heads, etc) will make them show their ugly head. period.

BigMike92Z

im using an nx kit and after 8 bottles with the 100 pills, no retard and no detonation. run 93 octane and i dont spray below 3000, only because my car has 163k miles. stock longblock with that mileage and its taking the 100 shot quite nicely. no new times with it yet, though i should have some tomorrow. ill go with 125 pills and letcha know what it does.

Benny

I have that kit in my car and it works just fine, I am using the 100 HP jets just for good measure, also running a purge valve and remote bottle opener. The kit added good power and set up is excellent, recommend running just standard plugs, no platinum. Also, there is no need for an engine rebuilt like in an earlier post, thats just stupid. Nitrous doesn't blow up engines, people do.

Todreich

Stupid is telling people that nitrous is just fine and letting them think that it's perfect for non-built engines. Yes, it does work, yes it can go a long ways, but it can in uneducated hands it can blow motors. (saying people blow motors is assinine) I recommend the build up as a learning tool so that when the nitrous is applied the set up can take the hit and the owner knows what he or she is getting into.
For those of us who build and maintian performance street engines NOS is a wonderful way to get extra power in each combustion stroke. For the novice it can be an expensive learning curve. I stand by my assertion that he build a proper engine first then try out NOS.
If he's going to thrash the engine anyways, he might as well shoot a bottle for fun and maybe hole a piston, maybe not. However, if its his daily driver I just want to save him the heartache of blowing his ride.

Benny

Millions of people have used Nitrous on non built engines with no problems, maybe you had a bad experience with it. Yes there are people who install it and abuse it. Most of the kits out there, this one included are designed for use with stock engines, yes, a built engine will handle a longer shot or more frequent use, but in no way with the PROPER fuel delivery and proper installation does an engine have to be built up to handle Nitrous. Also I didn't tell him it was just fine to run it , I said it works just fine in my car, also I told him I am runnind the 100 HP jets for good measure instead of the 150 HP jets. The average person on these boards who wants nitrous wants it for the increased performance it will give him/her but does have to realize to use it in moderation, espicially on a stock engine, it is definitly not a stoplight to stoplight thing or a Hollywood "Fast and the Furious" thing. In my case I use it about once a month when I go to the track, and only for about 2-3 runs, any more than that I wouldn't do I guess unless I had a stronger bottom end.

Benny

I couldn't have said it better myself.

mrr23

stupid is telling them, and i quote from you:

You can use NOS in the stock 5.7. Once. Then you can rebuild it with proper crank, connecting rods, and pistons and really use NOS. :^)

smart is telling them that they can use it and how to. and what can go wrong if they abuse it like others in this post have said. that is education.

12 Sec GTA

Well said mrr23.

BigMike92Z

agreed, robert. stupid is making the assumption that th emotor cannot handle it and also making the assumption that the guy is a moron. using nitrous is not rocket science. a little bit of basic logical thinking and you will have no problems. i wouldnt recommend going much more than a 125 shot without AT LEAST a fuel pump though.

Benny

This may be a dumb question, but does the aux fuel pump run in conjunction with the stock one? Does the aux one replace the stock one? What is the best setup as far as an auxilary fuel pump and where does it tie into the fuel system? Thanks.

mrr23

yes it runs inline. most of the time you would place it just before the fuel filter. but on the 05151 kit i don't think it comes with another pump. not needed. unless you go above 125.

Lessk

Well, I didn't plan on using 150, 100 or 125.

And I planned on doing a lot of the other changes to make it a reliable speed deamon. And worry about nitrous after its already an great machine.

I'm not the type to abuse the car. Rather use for its muscle greatness over beating it down with a brick like I've seen some people do.

One of the greatest things, although not a difficult one, to do is beat down on the ricers, show them that Fast and the Furious was a bunch of BS. More like, Slow and the Foolish.

Lessk

Thanks for all the replies guys, I know I'm the new guy in town with only 5 posts now or so, I didn't expect the good results.

Thanks fellas

I'll be hanging around more often though.

mrr23

anytime

Todreich

For those with NOS in their daily driver where are you locating the tank? I am serious. With all due respect I have only used NOS at the track for the 1/4 and 1/8 strips so my knowledge on street machins with NOS is somewhat limited. I cringe at the thought of being stopped and having the bottle strapped in beside me.
Thanks also for the discourse on NOS with out resorting to flaming. It's nice to post to a board where that doesn't happen.

mrr23

http://www.compucarnitrous.com/690310.htm

you can put it in a duffle bag like this if you want it in the car near you. i have it in the trunk well right now. bigmike has it bolted to the driveshaft tunnel. 12 sec gta has it in the spare tire well.
we try not to flame people. but sometimes happens. flaming does nothing to help.

Lessk

Yeah, its nice when there is a lot of constructive comments and opinions....I have no problem with opinions....except the ones ricers make, hehehe.

Infact, I go looking for opinions. Such as this thread. It helps in decisions.

The reason I want to go for nitrous is because its a lot cheaper then a turbo or supercharger. Even though, without a doubt it would be nice to have that extra boost 24/7, when you wouldnt, or in my opinion rather, shouldnt use nitrous all the time.

That kick in the pants feeling when it kicks in has got to be cool too

mrr23

it is

papaford

I don't know if I was just lucky or what but I ran a 175hp shot of nos on my STOCK 91 gta for more than a year at a time when I was racing everything that moved and at the track. I used at least a bottle a week and never had any problems.. the car ran 14.0 off the juice and 12.23 on it and like I said I used it A WHOLE LOT.

Lessk

Cool

Lessk

Mine will be a Daily Driver for me, and I plan on making it a street beast, capable of 11s or 12s (I'd like 10s ) and still be reliable and not a gas guzzler.

Speaking of which, what kind of milage do you guys get with tweaked motors?

mrr23

12-13 in town on #8 broken ring. 17 highway.

BigMike92Z

highway - 20-23
around town i have a bit of a leadfoot but still manage 15 or so.

Lessk

Thats not bad at all. And for me thats not a big deal, I'd be happy filling up a 800 HP motor because cars are my life.

I was just curious. Right now, since I dont drive around much in my Bronco, I fill her up every 2-3 weeks. Which is pretty darn good for that type of vehical. And I pretty much always accelerate at a fair amount compared to all other cars around me at a light.....I can't help it.

Benny

I get an average of 16-18 with light mods and the NOS 05151 kit, I usuall only use the kit once or twice a week, but good power when I need it.

Lessk

Pretty cool

They sure made these cars well, fast, powerful, and still gets good gas milage. How great is that!