For any one wondering how much of a shot you can run without destroying your engine here is something to look at .http:/www.chevyhighperformance.com/techarticles/148_0303_small_block_nitrous_blow_up/index.html . I can't get it to post as a link . Sorry for that .

 

http://www.chevyhiperformance.com/te..._up/index.html

 

Thanks crazy_hotrodder I could not get it to post and work . What do others think of what they can feel safe running without destroying there engine ?

 

Depends on what pistons, crank, rods, (cast/forged), and if the motor set-up is designed for nitrous....like cam, heads, etc....also how good your fuel system is, and if you have good ignition with timing retarders.....if you talking about a stock motor....personaly I wouldn't go more than 50-75 shot, if any at all on a stock motor...some say 100 shot is safe....but I don't think so....

 

If I did like the link said they did and I was only doing it on a weekend I wouldn't be afraid to hit it with 300 shot but not all the time I'm sure something would go if you did it all the time .

 

NO offense, but a 300 shot.......it'll blow motor up, I'd bet my camaro on that.
Plus that article Says HOW MUCH CAN IT HANDLE not how long can it handle it.......yeah you might be able to spray 300 shot once, but who builds a motor to run once...
I'd bet you'd hit the button and slam that crank right out of the car...

 

They stepped the shots up each pull and it handeled it fine untill they shot it on the last pull to low in rpms. Then it had problems but did not blow the engine to pieces. So if I had an engine like what they had I would not be afraid to take it to the track and make 1 or 2 passes with a 300 shot only on a weekend when I could . P.S. got to go for the day try to get back on tomorrow .

 

if you want......last week a friend of mine was spraying 200 shot in his car....fully built motor, forged internals, everything...done right, anyway it ran lean or something, blew the hood off car when it blew up.....

No offense, but if you think you can do a 300 shot on anything stock...you in for a rude awakening when it blows....good luck.

 

i dont know...
seems awful high to me, but hey...
in the end, they say that the low compression probably was the reason that it held so much juice without blowing up.

 

You can do a 300 shot on a stock motor.............Once.

 

holley says 20hp per cyl on stock internals

so roughly 150 shot safely on a v8 and they don't even suggest pulling timing or putting in colder plugs

I hit mine with 125 shot, never had a problem, and i sprayed on top of my modded tune which had 8 degrees MORE timing then stock.

 

Ive sprayed a 150 shot on a basically stock LO3 that just had an open element and catback. I also sprayed that shot for many weekends in a row constantly and to this day the motor still holds. Oh and for those wondering I have sprayed many launches.

IIRC 1991camaro something on here was over a 150 shot and I believe a stock motor. As long as your motor is in good tune its fine.

 

I spray 125 on an LB9, stock timing with no issues. I've seen 305 handle 200hp shots before...look it up!

 

Would anyone on here feel safe to go 300 on a mostly stock 350 with a nitrous cam and timeing adjusted accordingly ? Or am I the only one that would ever try this ?

 

Make sure you take videos.

 

If I had a good 350 and some nitrous I would but I have neither .

 

alright dude....notice the article you were referring to uses a 'junkyard' motor...cause they don't want to use a nice one...cause it WILL blow up, not if, but when...they were just testing to see what it throw at it, as an experiment, not as something anyone should try......you cannot spray 300 shot...you WILL blow the motor, let alone the trans. and rear end maybe.....if you want to spray a stock small block...put 100 or 150 shot on it and be done with it.....300 is just stupid....not trying to be rude, but no one has agreed with you yet.....it can be done, but shouldn't. 300 shot is a LARGE LARGE shot.

moderator please>>>>

 

If you do decide to do this.....please take a video...

 

If I had the engine and all the stuff needed to do this I would . I said I wouldn't be afraid to take a car to the track with the engine setup like they did and run a pass or two on 300 . Not that I would spray that much all the time . I know that if I was going to run that much all the time I need to build an engine to handel it but to hit it once or twice should be fine . They did not hurt there engine till they sprayed 425 or450 too low in the rpms and itdid little damage not destroy the whole engine just a couple of stock pistons lost pieces not entire piston . If I was going to build an engine to run in something I WOULD NOT RUN OVER 150 SHOT !

 

well when you break pieces of piston off....thats bad.....considering you don't even want a grain of sand in that combustion chamber....just imagine what that little piece of metal did bouncing around in there....denting and scratching everything....Not good. It only takes some metal shavings to destroy a motor.

 

Yes that is bad but not as bad as blowing a head off or dropping the bottom end I say that is a good indicator of what you can do with a stock engine with only changeing the cam to one for running nitrous and adjusting timeing . Wouldn't you say ?

 

true, but if you're going to do this.....just build the motor correctly and you'll not have to worry about it...

 

True . but isn't it amazeing what a small block can handel before it has a problem ?

 

"...some say 100 shot is safe....but I don't think so...."

" if you're going to do this.....just build the motor correctly and you'll not have to worry about it"

" last week a friend of mine was spraying 200 shot in his car....fully built motor, forged internals, everything...done right, anyway it ran lean or something, blew the hood off car when it blew up....."

No offense but you have no idea what's really going on on the nitrous front. Honestly I like people like you that have decent hot rod knowledge but don't know much about nitrous, it allows people like me to continually run "faster than I should". I have a pair of the biggest NX solenoids they make (right under the methanol ones) hitting a .073 jet in my car and running right at the lean limit on the fuel, I've scorched out NGK Tr6 plugs more times than I can count and my junkyard 350 is still going fine. BTW the guys at NOS say that my plate can handle a 250 shot and that a .073 jet is a 200hp shot so... take it for what it's worth. BTW I have been running this car every season for several years now. I honestly bet oil leaking from the old oil pan gasket will stop it before nitrous does. If you keep it all in perspective and adjust your stuff accordingly, you can get away with more than you ever imagined. The guys at Chevy High Performance were making the HUGE newbie mistake of purging into the motor at idle, this is a VERY bad idea for a number of reasons, it wasn't the spray that killed that motor, it was the foolish use of the nitrous.

 

I agree , it was the foolish use of the nitrous that hurt the engine .

 

The only reason a solid stock 350 shouldnt survive an indefinite number of 250-300 HP shots is a fault causing a lean condition, too advanced timing or excessive RPM's.

Whether that fault is caused by the owner/driver or a malfunction matters not at all, and when such a fault occours you'll likely dammage the motor at just a 50-100 shot and/or with forged internals.

I for one can pick up 350's for less than $100 any day of the week so I wouldnt start crying over a few collapsed ring lands.

I would also rather kill a $100 motor sussing out issues than blow a $3000+ motor for no reason at all.

 

I also would rather get a $100 engine to play with than build a high dollar engine just to have something exspencive break . If they hadn't sprayed the engine to low in the rpms it COULD have survived the 425 shot .

 

So you guys are saying you would rather have a motor you just picked up out of a junkyard than a nicely built motor.......you say i don't have knowledge of nitrous, I've ran nitrous motors before....I'm not saying I know all, but I DO NOT half a** or build junk motors. I do them correct....no matter what that may be. Throwing in a junk motor in my mind is a waste of time.....if you just wanna blow the motor up and don't care what happens, fine. But people like me want them built correctly....people that just throw motors together I have a saying for
"It is mostly, probably, most likely fine..."

 

Hey 91interceptorZ I'm not saying anything against you man just that if I was to get an engine and wanted to spray it and not worry if it blew I would go for a JY engine and if I wanted to make gobs of power and it last for a long time I would try and do it with a built NA engine . Sorry if you thought I was putting you down at all man .

 

I know...I was saying for camaroRslow and what not.....I know you CAN do a high spray on a JY motor, but I wouldn't......

 

I would love to try it if I had everything needed to just to see for myself what I could do with the JY engine .

 

if you want a 300 shot just be sure to get a jacobs nitrous mastermind and msd box, the mastermind allows you to "Ramp up" the nitrous in relation to engine rpms(so say start at 50% of max flow at 3000 rpms and mayby hit max flow at 6000 rpms but thats just an example) nitrous is funny in the way that a 300hp shot is 300hp at any rpm, however its more torque at low rpms then high rpms. in plain english this means say a 200hp shot at 3k rpms is the same as 400hp shot at 6k rpms(again just an example) thats what i plan on doing for my 305 however im only going to be running about 150-200 shot depending on base engine hp im only looking for about 500hp on the spray

 

But your not going to do this on stock crank, rods, and cast pistons??? right??

 

The JY 350 they used in the link probably had a forged crank in it but the pistons were still cast I think . I don't know if I would put that much nitrous in a 305 stock it may defenitly fly apart .

 

89-bird, since you spelled it incorrectly on 4 occasions, i just wanted you to know that the word is spelled "handle". Have fun blowing up engines

 

i spray a 200 shot on my car, ive been through 5 bottles and havent hurt anything yet, i allways run 108 octane if im spraying it though

 

Rules for all newbies:
1. Your motor can only handle 100hp worth of nitrous, 150hp will break it in 10 runs

2. That guy that keeps out running you with the same setup at the track is going to blow his motor up any second now, just watch!

Then 3 years later when I'm still running the same exact engine you might want to reconsider what you've been told. I'm not going to educate you on what it takes to keep your engine alive on spray. I told Vipershark11 that his 305 TBI engine could handle a 150 shot just fine and the jetting was on the high side for a 150. I walked him through what he should have before he ran it and his car is still intact and running fine. ls six has already covered the main reasons an engine blows up on nitrous, the only other reason is inadequate distribution between cylinders, look it up from there and be logical. Racing is pushing the limits it always has been, have fun with it.

 

it will be a stock crank(cast is supposed to be good to 500hp reliably), it has scat oem replacement rods(supposed to be good to 500hp reliably) with waveloc bolts and hypereutectic pistions(supposed to be good to 600hp as long as no detonation)
Also thought i would add a little bit extra in, i personally know someone who is running a 300 shot on a stock bottom 2 bolt 350 with a cam and aluminum head making roughly 620 hp at the engine, last season was his 6th year with that setup and still hadnt blown it up despite people telling him all year every year he was going to, he also dosnt run anything like the jacobs mastermind or w/e nos new controller is. is it a gamble with a stock engine? yes, is it guaranteed to blow up? no, its probably 50% setup and 50% luck in a case like that. personally i dont think you will have any problems if you run a progessive controller, im not going to be running that much becuase i have a specific goal im looking for, after that im just building a 5.3 turbo screamer for monster power =/

 

I Remember reading once that an engine has so many horse power hours on it. so for instance if a 350 stock making 200hp is good for 150,000 miles it is capable of producing about 30,000,000 horse power hours, the same engine at 500hp should be good to 60,000 miles. This assumes you have an even air to fuel ratio in all cylinders, spark adequate enough to deal with the increased cylinder pressure, and proper timing setup for the combination. This should seem to apply here, of course with it's limits. This is stated in theory not experiance.

 

I know I spelled it wrong but did not want to fix it because people would know what I was trying to say .

 

Blah blah blah, a whole bunch of BS based on theories. It really annoys me when people say "this WILL happen" and "that will happen" when you have absolutely no idea.

This is simple. There are so many variables there are no absolutes. If you have a JY motor that you don't care too much about, then DO IT!!

A 300hp shot is pretty risky due to the massive increase of cylinder pressure. A low compression motor, or one with a narrow LSA cam might soften that hit.
But hows the trans going to act? Could you even put that power to the ground? If you do have great tires, will the rear hold? And if everything breaks, how much will you care?

It is amazing what these stock motors can handle, I know of one that went 9.3 in the 1/4 with 20+ psi. I ran 16+ psi to my 305 and it never blew or showed any signs of distress. BUT, I am worried about blowing up my all forged motor with only 8 psi.

If you were to do it, I would only recommend doing a 100 shot, just to test things...

And HOLY ****, if you don't know how to spell "handle", I don't know how you dress yourself in the morning, let alone install a nitrous system. Kill yourself. Didn't you know that working on cars requires you to study the dictionary? This is why all car mechanics are required to have a master's in english. lol.

 

I know how to spell handle but it was typoed due to me not being good at typing . As for your bile attitude you cankeep that to yourself please .

 

I was being sarcastic. Maybe your not good at reading either.

 

I can read very well . I took it wrong and am sorry for that even sarcasam can be interpreted as badmouthing someone . Anyway what is your take on the ChevyHighPerformance JY engine and would you feel safe to try it like they did ?

 

IF you were to do this, I would suggest mix of race gas in the tank with 93 octane. It has to be a direct port shot. It has to have ignition retard, colder plug probly 2 steps colder than stock, and it has to be ramped up in stages. There is a chance it will hold. How long i dont know. ANY detonation will destroy it at full 300hp shot. Too lean in a cylinder will heat it up to the point the rings may butt up against each other and break a piston.
IF at all possible, upgrade rod bolts.
Keep the rpms down and dont have the full 300 come on til high up there. RPM kills motors so keep it low and it will have better chance of holding power. Work up the shot and monitor everything. start out small and work the way up

That being said it be interesting to see how it goes. You can blow up any motor just about with a poor tune and light shots like 50-100. But some will take 300 shots all day long. Just has to be tuned right and the parts have to hold up.



I will say that there are many guys running 100-150 shots on stock motors just fine. I think thats fairly safe. Pull 4 degrees with a 150 shot to be safe. My 383 setup with nitrous in mind ran a 150 shot with only 2 degrees pulled but i bet it would have handled full timing which was only 34 degrees for best power n/a.

 

this thread is funny. lol
my junk is running high 9's in the 1/4 with stock pistons, rods, and crank with a 180 shot. i am going to continue going up on the shot with a progressive controller to lessen the initial huge torque spike off the line. good fuel, correct plugs, and pulling the right amount of timing should keep a stocker alive through some pretty insane stuff.

most likely, a 150 shot will not blow one up in 10 passes. more like 200 passes maybe.... the people blowing their stuff up most likely dont know what they are doing, or made a critical mistake with one of the variables i listed above.

 

I love that I started this thread and we are getting so much info from people running nitrous on there cars and what amount they are running . If I wanted to run a shot on my 2.8 what would you all say would be the safe point because it is a daily driver I would like to keep running and driveing .

 

I would say 50 max if its your only car and you need it.

 

Thanks that's what I was thinking 50-75 max . Probably 50 if I decide to get nitrous for my car .

 

I think max recommend for cast internals is 150. I agree with what you've stated here. Throwing a 100 shot on a engine that is 30 years old and about to fall apart is probably a recipe for disaster.

But if you've got a cast internals motor that's well put together it'll handle that 150 no problem.