Who has gone past a 150 on stock shortblock?
08-11-2010, 03:54 PM
#2
Lots of people have sprayed more than that on a stock bottom end. Life span varies on level of abuse and how good the tune up is. I'd stay around there if not just a bit higher (175-200 with VERY good tuneups) unless I had some strange fascination with melting pistons.
Look at the guys in the thread below with SS next to their name - they are the guys going big on the stock shortblock.
https://ls1tech.com/forums/nitrous-o...rous-list.html
It may blow up first pass (especially if something isn't kosher) or it may live forever... Your mileage may vary.
Look at the guys in the thread below with SS next to their name - they are the guys going big on the stock shortblock.
https://ls1tech.com/forums/nitrous-o...rous-list.html
It may blow up first pass (especially if something isn't kosher) or it may live forever... Your mileage may vary.
08-11-2010, 04:50 PM
#4
OP - Don't do what brokenbird did. Whatever you spray have the car tuned properly, running the right plug, etc. The setup is what will keep these things alive.
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08-11-2010, 10:40 PM
#12
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all i did was go to a tr6 and give it hell since first time i figured it would blow but it didnt so i kept at it till it did just so happened it took 5 years of 2 bottles a weekend on my poor LT1 lol
08-11-2010, 11:39 PM
#13
TECH Senior Member
Aside from proper tuning, the key is not to spray at too low RPM. The lower the RPM, the more spray enters the cylinder per intake stroke (and that means higher cylinder pressure and increased odds of detonation and KABOOM!!!.
08-12-2010, 08:08 AM
#15
Anything above 3000-3200 is normally a pretty safe bet.... A4 or M6?
If M6 make sure you have a window switch so that if the car bogs when you leave it doesn't continue spraying at a uber low RPM. I had one really nasty nitrous backfire on one of my first cars because of that (back before I knew any better).
If M6 make sure you have a window switch so that if the car bogs when you leave it doesn't continue spraying at a uber low RPM. I had one really nasty nitrous backfire on one of my first cars because of that (back before I knew any better).
08-12-2010, 11:17 AM
#17
TECH Senior Member
3000 is the old standby rule...however, consider this...
Let's say we're gonna spray BIG....say, 300 HP. Don't shoot me...just sayin' for argument's sake. The amount of nitrous the cylinder "sees" at 4500 RPM with a 300 shot is the same as the cylinder would see at 3000 with a 200 shot.
So....for example, you could spray 200 HP at 3000 and then 2nd staging to 300 HP at 4500. You could also us a progressive nitrous controller to gradually transition from 300-400 instead of the sudden hit of a 2nd stage.
Keep in mind that an engine naturally makes more cylinder pressure at 4500 than at 3000 and that is additive to your N2O. So don't think I'm saying that the cylinder pressure made with a 300 shot at 4500 is the same as the pressure made with a 200 shot at 3000. In real life perhaps a 250 shot should be used as the second stage.
The whole point is that the engine will safely take more nitrous at higher RPMs.
Let's say we're gonna spray BIG....say, 300 HP. Don't shoot me...just sayin' for argument's sake. The amount of nitrous the cylinder "sees" at 4500 RPM with a 300 shot is the same as the cylinder would see at 3000 with a 200 shot.
So....for example, you could spray 200 HP at 3000 and then 2nd staging to 300 HP at 4500. You could also us a progressive nitrous controller to gradually transition from 300-400 instead of the sudden hit of a 2nd stage.
Keep in mind that an engine naturally makes more cylinder pressure at 4500 than at 3000 and that is additive to your N2O. So don't think I'm saying that the cylinder pressure made with a 300 shot at 4500 is the same as the pressure made with a 200 shot at 3000. In real life perhaps a 250 shot should be used as the second stage.
The whole point is that the engine will safely take more nitrous at higher RPMs.
08-12-2010, 02:43 PM
#18
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3000 is the old standby rule...however, consider this...
Let's say we're gonna spray BIG....say, 300 HP. Don't shoot me...just sayin' for argument's sake. The amount of nitrous the cylinder "sees" at 4500 RPM with a 300 shot is the same as the cylinder would see at 3000 with a 200 shot.
So....for example, you could spray 200 HP at 3000 and then 2nd staging to 300 HP at 4500. You could also us a progressive nitrous controller to gradually transition from 300-400 instead of the sudden hit of a 2nd stage.
Keep in mind that an engine naturally makes more cylinder pressure at 4500 than at 3000 and that is additive to your N2O. So don't think I'm saying that the cylinder pressure made with a 300 shot at 4500 is the same as the pressure made with a 200 shot at 3000. In real life perhaps a 250 shot should be used as the second stage.
The whole point is that the engine will safely take more nitrous at higher RPMs.
Let's say we're gonna spray BIG....say, 300 HP. Don't shoot me...just sayin' for argument's sake. The amount of nitrous the cylinder "sees" at 4500 RPM with a 300 shot is the same as the cylinder would see at 3000 with a 200 shot.
So....for example, you could spray 200 HP at 3000 and then 2nd staging to 300 HP at 4500. You could also us a progressive nitrous controller to gradually transition from 300-400 instead of the sudden hit of a 2nd stage.
Keep in mind that an engine naturally makes more cylinder pressure at 4500 than at 3000 and that is additive to your N2O. So don't think I'm saying that the cylinder pressure made with a 300 shot at 4500 is the same as the pressure made with a 200 shot at 3000. In real life perhaps a 250 shot should be used as the second stage.
The whole point is that the engine will safely take more nitrous at higher RPMs.
It makes me wonder what else the person does with the car. Timing, fuel, plugs-gap, fuel system, (gas station pot luck), window switch. ect.... You hear of guys that run the car forever. I've personally seen guys blow them up on the first bottle. I always tell people 150 to be safe, not knowing anything else about the car.
08-12-2010, 03:18 PM
#19
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i have a stock motor in my 88 and run a 125 dry shot. runs 11.53 @ 119 with 1.5 60fts. idle launch. well not stock has ls6 intake and a fuel pump. dont see pushing more then that unless i go with a wet shot.
08-13-2010, 04:00 AM
#20
I've been spraying a 200 shot out of the hole for a couple years. I got tired of using a controller and went to a push button. I footbrake to 2k and as soon as the gas pedal hits the floor I push the go button. I've yet to have an issue with doing it my way. I drive my car to the track and have never had to be towed.