i got lucky...but then again, i know what im doing with Nitrous, and just didnt care if the motor got hurt...

only pulling 4* timing and running 93 octane, jetted 225 and 275, side note, motor still ran good, and made the 363rwhp with my HSR about a month back, but power has been dropping off, and oil consumption/oilpressure has been falling!

im afraid to yank the bottom end apart, haha i bet the bearings are hammered to HELL!

heres a few piston pics from the teardown...

amazingly clean inside..no carbon buildup on any of the pistons, except the worst one{it started using oil in that hole, pistons cracked/melted BADLY}


MMMM! i love me some salt and pepper on my pistons!

notice the upper lefthand corner...and all of the heat checking in the piston...but DAMN that ***** clean for having 60k+ miles on it and probably 30 bottles of nitrous through it!

 

what oil did u use?

 

That's why nitrous is so safe. If you overdo it, the piston will open up to vent the excess cylinder pressure.

 

mobil 1 full syn since ive owned it.

hahahahah! im honestly really surprised it held without popping a head gasket, or throwing a rod...this motor took ALOT of abuse, it still ran rather well, would just use/burn oil when you got on it hard.

 

it's not clean because of the oil, it's clean because every time you hit it with the spray you blasted the carbon out of it... (for the person that was asking about the oil)

 

Well, it doesn't look as bad as what I went through - and I didn't use nitrous! But it's still a tear down so I feel your pain.

 

nitrous doesnt kill engines, people do. lol
why were you only pulling 4 degrees on that size shot??? you should be around 22-24 degrees total!

 

i didnt care, i was trying to burn the motor down.

if i hadnt needed to save certain parts, ida pilled it for 500 just to see what happened.

 

why would you want to burn a motor down? why not sell it to someone who needs it and put that money towards your new engine? never have understood this logic. besides, if you would have set the timing right and jetted it up to a 275 at least the car would have gone faster.... what you did still could have ruined everything, just as easily as a 500 shot would have.

 

the car hasnt been sprayed since the HSR got finished..

when i sprayed it, i didnt have parts for sale off it, so i had no worries.

im not going to sell a motor thats had 30+ bottles through it, to someone, and have it come back on me if something happened to it...motor was losing oil pressure, and starting to consume oil...thats NOT something id sell to anyone.

Lol, the car has et'd a best of 11.29...and mph'd a best of 133...all with a banger trans, and a 255/ 16 drag radial.it wouldnt have gone faster, the tires wouldnt hold the power it already made.

 

that motor would have worked great in someones truck or daily driver. the reason why it was consuming oil is because you destroyed the rings with incorrect nitrous tune up and pump gas. ring lands in the pistons are also probably shot, too.

 

You fail to realize i already understand all of this..and i KNEW the consequences, i DIDNT CARE!

The motor had seen nitrous on a safe tune, and i STILL wouldnt sell the shortblock to anyone.

I am not a newb to nitrous, ive sprayed countless cars, without any issues..i got greedy and lazy with this motor, because i simply didnt care what happened to it. You are acting as if small blocks are rare or something.

Case in point, like i have STATED before, even before i melted the plugs down, and burned the pistons...i still WOULDNT have sold it to someone else. and it still ran/drove fine, hell it even made 363rwhp! i put a little over 1k miles on it since any of that happened.

IF someone wanted the motor, they could HAVE it! but i would never sell a nitrous motor to anyone, if it spun a bearing or something, i wouldnt want that coming back on me!

 

my thing is this... you starting this thread is why half the people in the world think nitrous is dangerous and destroys engines. nitrous isnt the problem, its the person using it. for all you know, you could have gone to a 350 shot on this engine without failure had you tuned it decently. 4 degrees of retard and pump gas is nowhere near being safe. basically all im getting from all this is you were trying to blow your motor up. ive been hitting my stock shortblock with a 200-225 shot for quite awhile now with no issues. and when im done with it im going to put it in another car and drive it. it makes 425rwhp n/a thru a th400/9".
you should have named this thread "kids, i finally ruined my engine with incorrect nitrous tuning."

 

Well, I guess if 89fbirdformula didn't care what happened to his motor on that big of a shot of nitrous without a proper tune, that's his choice and his $$$..only he knows why he did it, and to be honest it's none of my concern...

Would I purposely blow up/ruin my engine like that? - well, h*ll no. But I guess I'm just not rich enough to waste an engine I already have too much cash into. Plus I'm lazy and hate yanking engines out all the time.

I can't speak for others, but I've never thought of nitrous as being bad for an engine at all if properly tuned for it and used the right way. Heck, I'll show my age - but I first used nitrous myself waaaaay back in '86 on an old Road Runner, and the only "damage" it caused was a burnt clutch which was obviously not up to the task of holding the extra power. Once that was fixed, it was a great power adder - I just got tired of filling bottles and wanted more full time power myself.

I will say though, to start a thread on any board admitting that you purposely ruined your engine is bound to attract flame fodder...

 

you need a second hobby man...

this motor has been sprayed countless times, and had 30+ bottles through it, without an issue..EVER.

i burned it down during a race at what we call around here, street car chaos, it was a money race. i didnt have the time, nor the luxury to be able to switch the tune around, or pull more timing from it, and besides like i said, i didnt CARE if it blew up. why on earth you guys are getting so upset over someone burning some pistons in a SBC is beyond me.

The thread is titled correctly...and shows to those who DO care about their engines, what will happen, if you try and get greedy with nitrous.

 

timing is what did the damage, not the nitrous shot size or jetting. lack of fuel octane added to the issue.
i dont care about your engine, or why you blew it up, but its not fair to blame the nitrous shot size for blowing it up. the only thing you were overly greedy on is the timing, since thats what caused the chaos.