View Poll Results: Nitrous Activation: Would you spray below 3,000 RPM?
Hell yeah, no question I would!
105
19.13%
Yes, but you're playing with fire and she may blow!
55
10.02%
Maybe, but it depends on the system and safety additions.
123
22.40%
No way, you're asking for broken stuff!
266
48.45%
Voters: 549. You may not vote on this poll
Nitrous Activation: Would you spray below 3,000 RPM?
08-21-2007, 03:40 PM
#82
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Well, this is the official birthday of this thread. Yep, it's one year old today. With 390 votes on it, I think we've answered the question quite enough times. I wonder if Derek (the originator) has shot below 3k rpm and if so, did it all work out for you??
"Happy Birthday" to Derek's thread.
"Happy Birthday" to Derek's thread.
01-04-2008, 02:31 PM
#86
I voted no, although with a smaller shot it won't be as bad it's all in what the motor and chassis can handle, a 75 shot at 2,000 isn't going to be the same as a 250 shot at 2,000 obviously.
Best way is to put it into numbers, we can assume the car makes 200 hp @ 3,000, you add 150 hp and the torque will be about 613 ft torque
Say the same motor makes 120hp @ 2,000 with 150 hp nitrous on at 2,000, the torque would jump to 709ft torque.
Now you add a 250 shot at 2,000 rpm you're talking about 972 ft torque vs 788 ft torque if you added the 250 shot at 3,000.
Adding 250 @ 1,500 would be over 1,100 ft torque.
Keep in mind the slower the motor is turning the harder it will be on the parts when you spray it.
You can figure it out with a dyno graph and plugging in the hp added at the rpm using the torque formula.
5252 X HP / RPM
It's also a good way to blow head gaskets.
With a smaller shot I wouldn't go below 2,500, on bigger shots 3-3,500 and up, at that point you'd have a higher stall and be leaving with more rpm anyways.
Just my .02
Best way is to put it into numbers, we can assume the car makes 200 hp @ 3,000, you add 150 hp and the torque will be about 613 ft torque
Say the same motor makes 120hp @ 2,000 with 150 hp nitrous on at 2,000, the torque would jump to 709ft torque.
Now you add a 250 shot at 2,000 rpm you're talking about 972 ft torque vs 788 ft torque if you added the 250 shot at 3,000.
Adding 250 @ 1,500 would be over 1,100 ft torque.
Keep in mind the slower the motor is turning the harder it will be on the parts when you spray it.
You can figure it out with a dyno graph and plugging in the hp added at the rpm using the torque formula.
5252 X HP / RPM
It's also a good way to blow head gaskets.
With a smaller shot I wouldn't go below 2,500, on bigger shots 3-3,500 and up, at that point you'd have a higher stall and be leaving with more rpm anyways.
Just my .02
01-30-2009, 10:25 PM
#87
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From my experience i would not hit a 125 or grater under 3,000 rpms. I had my 175 flywheel shot come on at 3000 and it hit like a brick. I thought about raising the activation point but the motor let go before I got a chance to. A smaller shot would prob be fine activating under 3,000 but the more you spray the more i would like to raise the activation point. Just my observations.
02-08-2009, 02:22 PM
#91
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I ran 125 shot all year in 08' spraying it off the line at about 1,800 rpms about 1/2 the time. It blew in december when i hit the spray at 4,000, wtf! Other than my busted #7 piston, the rest of them looked fine after the abuse i put them through.
02-26-2009, 03:28 AM
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I wouldnt spray below 3000rpms. Why would you even want to?
My friend has a 2001 Corvette and sprayed at 1800rpms over and over and it started smoking worse and worse with every pass and finally he had to take it apart and ring it.
My friend has a 2001 Corvette and sprayed at 1800rpms over and over and it started smoking worse and worse with every pass and finally he had to take it apart and ring it.
