150 shot doesn't feel the same up top as it does down low...
Thread Starter
On The Tree
Joined: Aug 2003
Posts: 123
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From: Las Vegas, NV
150 shot doesn't feel the same up top as it does down low... A couple weeks ago I put on a wet kit and it's jetted for 150 shot currently. I had it dyno tuned for a 150 shot and 91 octane (damn the desert).
So anyways If I roll into it and let the window switch activate the spray it hits pretty damn hard but lets say I switch off the nitrous at 5k+ rpms and maintain WOT there's not much of a difference in the butt dyno... Is this normal because I've already passed peak torque or is there something else going on? Any help would be appreciated!
So anyways If I roll into it and let the window switch activate the spray it hits pretty damn hard but lets say I switch off the nitrous at 5k+ rpms and maintain WOT there's not much of a difference in the butt dyno... Is this normal because I've already passed peak torque or is there something else going on? Any help would be appreciated!
Originally Posted by BackinBlack02SS
Normal, the lower the RPM, the more torque.
HOWEVER, if your bottle pressure is dropping to already low pressure/no heater, or low bottle, than you will REALLY feel the drop off. What psi is your bottle?
That's the benifit of multi stage and/or progressive. A more linear torque curve. The one hit in all torque monster peaks and goes down. If you have a second stage kick in at this torque peak area then you keep pulling and even a third stage after that. A multi stg or progressive set-up will in fact win more races than a a one hit wonder.
Robert
Robert
Thread Starter
On The Tree
Joined: Aug 2003
Posts: 123
Likes: 0
From: Las Vegas, NV
well that makes me feel better about my setup at least 
While a multi-stage/progressive would be nice for several reasons I just don't have the scratch to drop on something like that right now.
As far as bottle pressure goes, I have a NOS bottle heater on it currently but I noticed that before I sprayed psi was roughly ~925 and then after I let off the psi ended up around 890 from just a third gear pull in an M6. I was not able to watch the gauge during the run as my gauge is attached to the bottle in the back seat. Is that kind of pressure drop normal? It was around 70deg and I had my t-tops off when i was spraying.
While a multi-stage/progressive would be nice for several reasons I just don't have the scratch to drop on something like that right now.As far as bottle pressure goes, I have a NOS bottle heater on it currently but I noticed that before I sprayed psi was roughly ~925 and then after I let off the psi ended up around 890 from just a third gear pull in an M6. I was not able to watch the gauge during the run as my gauge is attached to the bottle in the back seat. Is that kind of pressure drop normal? It was around 70deg and I had my t-tops off when i was spraying.
Originally Posted by TheSloth
A couple weeks ago I put on a wet kit and it's jetted for 150 shot currently. I had it dyno tuned for a 150 shot and 91 octane (damn the desert).
So anyways If I roll into it and let the window switch activate the spray it hits pretty damn hard but lets say I switch off the nitrous at 5k+ rpms and maintain WOT there's not much of a difference in the butt dyno... Is this normal because I've already passed peak torque or is there something else going on? Any help would be appreciated!
So anyways If I roll into it and let the window switch activate the spray it hits pretty damn hard but lets say I switch off the nitrous at 5k+ rpms and maintain WOT there's not much of a difference in the butt dyno... Is this normal because I've already passed peak torque or is there something else going on? Any help would be appreciated!
He ran that time on a basiacally stock Z06 with DR's and the bottle. 
Not to mention that he's a nitrous moderator! I hope to be spraying a 150hp shot here soon.................Good luck on your situation.
Originally Posted by Robert56
That's the benifit of multi stage and/or progressive. A more linear torque curve. The one hit in all torque monster peaks and goes down. If you have a second stage kick in at this torque peak area then you keep pulling and even a third stage after that. A multi stg or progressive set-up will in fact win more races than a a one hit wonder.
Robert
Robert
like that one. Trending Topics
I have single 150 wet shot and both my tq and hp curves are very much flat so I dont know why I here all this stuff about it dropping off quick with a single shot. My curves are flat either with the nitrous or without it, so maybe it is just how my motor is. But yeah, it does feel like a hard initial hit when you activate nitrous, I think the fact that your butt feels like it died off is just a false perception.
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Originally Posted by brad8266
I have single 150 wet shot and both my tq and hp curves are very much flat so I dont know why I here all this stuff about it dropping off quick with a single shot. My curves are flat either with the nitrous or without it, so maybe it is just how my motor is. But yeah, it does feel like a hard initial hit when you activate nitrous, I think the fact that your butt feels like it died off is just a false perception.
yeah, right after the initial lean spike the torque is a bit over 450, then shortly after that hits peak at 532, then VERy gradually drops off, i mean it is a very slight curve, for the most part it is very flat, maybe like a 20-30 degree slope at the most. Sorry though i dont have the graph on the computer.
Originally Posted by brad8266
yeah, right after the initial lean spike the torque is a bit over 450, then shortly after that hits peak at 532, then VERy gradually drops off, i mean it is a very slight curve, for the most part it is very flat, maybe like a 20-30 degree slope at the most. Sorry though i dont have the graph on the computer.
The scaling on the two sides is different though. The rwtq is from 200-900 and the rwhp is from 0-700.
Originally Posted by brad8266
yeah, right after the initial lean spike the torque is a bit over 450, then shortly after that hits peak at 532, then VERy gradually drops off, i mean it is a very slight curve, for the most part it is very flat, maybe like a 20-30 degree slope at the most. Sorry though i dont have the graph on the computer.
5.8literls1eater, that's some absolute mondo torque your putting out. Have you been able to get that to hook up? If so any times? Looks like you also broke loose on the dyno (dip in hp and torque)?
Robert
Last edited by Robert56; Oct 14, 2005 at 09:10 PM.
Originally Posted by TheSloth
A couple weeks ago I put on a wet kit and it's jetted for 150 shot currently. I had it dyno tuned for a 150 shot and 91 octane (damn the desert).
So anyways If I roll into it and let the window switch activate the spray it hits pretty damn hard but lets say I switch off the nitrous at 5k+ rpms and maintain WOT there's not much of a difference in the butt dyno... Is this normal because I've already passed peak torque or is there something else going on? Any help would be appreciated!
So anyways If I roll into it and let the window switch activate the spray it hits pretty damn hard but lets say I switch off the nitrous at 5k+ rpms and maintain WOT there's not much of a difference in the butt dyno... Is this normal because I've already passed peak torque or is there something else going on? Any help would be appreciated!
Originally Posted by Robert56
5.8literls1eater, that's some absolute mondo torque your putting out. Have you been able to get that to hook up? If so any times? Looks like you also broke loose on the dyno (dip in hp and torque)?
Robert
Robert
Originally Posted by 5.8litrels1eater
I haven't brought it to the track yet, but on my 17" mt et street radials (at 15#'s) it hooks on my VHT prepped road. I think the dip in hp/tq might have been the tune, it dipped down to 10.5, than back up to 11.0 where it stays.
Originally Posted by 5.8litrels1eater
I haven't brought it to the track yet, but on my 17" mt et street radials (at 15#'s) it hooks on my VHT prepped road. I think the dip in hp/tq might have been the tune, it dipped down to 10.5, than back up to 11.0 where it stays.
If you go to, User support-user name change request, they'll help ya out. Make sure you save your post count and join date.
Robert
Originally Posted by Robert56
If you look at my dyno you'll see a similar dip. Tuner at dyno said it was tires breaking loose when 2nd stage hit, and at my torque peak. That's why I was wondering if you had the same issue.
If you go to, User support-user name change request, they'll help ya out. Make sure you save your post count and join date.
Robert
If you go to, User support-user name change request, they'll help ya out. Make sure you save your post count and join date.
Robert
And thanks for the info on name change.
