Procharger 5psi mph gain?
01-07-2013, 10:10 PM
#1
Procharger 5psi mph gain? I want to know how much mph I will gain in the 1/4 mile with a d1sc at 5psi? My mods are Lt's/ory, 3" cutout, LS6 intake, ported tb, and a 224r cam. What mph gain can I expect runnning 5psi on a d1sc with FMIC? What is the normal mph per lb of boost?
01-07-2013, 10:48 PM
#3
Oh it will eventually see about 8-9psi when tranny is built, but right now I'm running a stock 4l60e that isn't going to like anything more than 5psi and might not like 5psi. Right now I'm looking to see low boost at low rpm. Like 5psi at 6000rpm
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01-11-2013, 08:59 AM
#9
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i am thinking it will gain 30-35% more power @ 5 psi so about 10 mph in the 1/4 is my uneducated guess. down low it will still be sluggish because it won't be making very little boost untill the revs start climbing.
01-11-2013, 12:42 PM
#11
Well, since noone asked, I will. What did your car run before this? Big difference if your car ran a 13.3@108mph and you add 5psi of boost vs. if it ran a 11.5@117 and now add 5psi to it.
Fact is, there's no clear cut, exact answer that anyone can give you. Get the car built, get it to the track and start to sort things out. You have to figure out how much extra traction you're going to need, how much stall, what rear gears, what rpm to launch at, what rpm to shift at. All those things are going to impact your times and trap speed (trap speed to lesser extent) and need to be sorted out at the track.
Fact is, there's no clear cut, exact answer that anyone can give you. Get the car built, get it to the track and start to sort things out. You have to figure out how much extra traction you're going to need, how much stall, what rear gears, what rpm to launch at, what rpm to shift at. All those things are going to impact your times and trap speed (trap speed to lesser extent) and need to be sorted out at the track.
01-11-2013, 06:14 PM
#13
Well, since noone asked, I will. What did your car run before this? Big difference if your car ran a 13.3@108mph and you add 5psi of boost vs. if it ran a 11.5@117 and now add 5psi to it.
Fact is, there's no clear cut, exact answer that anyone can give you. Get the car built, get it to the track and start to sort things out. You have to figure out how much extra traction you're going to need, how much stall, what rear gears, what rpm to launch at, what rpm to shift at. All those things are going to impact your times and trap speed (trap speed to lesser extent) and need to be sorted out at the track.
Fact is, there's no clear cut, exact answer that anyone can give you. Get the car built, get it to the track and start to sort things out. You have to figure out how much extra traction you're going to need, how much stall, what rear gears, what rpm to launch at, what rpm to shift at. All those things are going to impact your times and trap speed (trap speed to lesser extent) and need to be sorted out at the track.
01-14-2013, 12:08 PM
#15
Why would you shift it at a low rpm? Chances are, it's going to make peak hp at 6500-6800. 600-700rpm doesn't sound like much, but once you go into the next gear, it's going to be lower in the rpm band, which will be lower torque and hp, and will yeild slower times and lower trap speeds.
Think of it this way. At 6100 rpm, your car will make lets say 500hp, but at 6800 it makes 530hp. you're leaving 30+ hp on the table by shifting it at the lower rpm.
It goes back to what I said that you'll need to play with shift points and launch rpms as well as tire pressure etc etc to maximize your times. If you were only cutting 1.9 60' times spinning, it's going to be worse with the extra power from the procharger.
Think of it this way. At 6100 rpm, your car will make lets say 500hp, but at 6800 it makes 530hp. you're leaving 30+ hp on the table by shifting it at the lower rpm.
It goes back to what I said that you'll need to play with shift points and launch rpms as well as tire pressure etc etc to maximize your times. If you were only cutting 1.9 60' times spinning, it's going to be worse with the extra power from the procharger.
01-15-2013, 01:56 AM
#16
Why would you shift it at a low rpm? Chances are, it's going to make peak hp at 6500-6800. 600-700rpm doesn't sound like much, but once you go into the next gear, it's going to be lower in the rpm band, which will be lower torque and hp, and will yeild slower times and lower trap speeds.
Think of it this way. At 6100 rpm, your car will make lets say 500hp, but at 6800 it makes 530hp. you're leaving 30+ hp on the table by shifting it at the lower rpm.
It goes back to what I said that you'll need to play with shift points and launch rpms as well as tire pressure etc etc to maximize your times. If you were only cutting 1.9 60' times spinning, it's going to be worse with the extra power from the procharger.
Think of it this way. At 6100 rpm, your car will make lets say 500hp, but at 6800 it makes 530hp. you're leaving 30+ hp on the table by shifting it at the lower rpm.
It goes back to what I said that you'll need to play with shift points and launch rpms as well as tire pressure etc etc to maximize your times. If you were only cutting 1.9 60' times spinning, it's going to be worse with the extra power from the procharger.
01-16-2013, 07:18 AM
#19
It's very hard to say what gains you will see with just 5 psi, because very few around here have ever gone with such a low boost setting. The blower will be spinning much slower than one that is set up build 7 to 8 psi of boost, that it won't start making boost until a much higher rpm. Because of the cost involved with tunes, pulleys and blower belts, I would initially get it set up to make 8 psi of boost, then short shift it until you get the transmission built. That way you'll have more usable boost lower in the rpm range, and it will keep cost down. You will still end up having to have the tune touched up for the new transmission and converter, but overall you'll still save money. the hardest thing on these automatics is to go wide open throttle when the car is in overdrive. Manually dropping it into 3rd before going wot will enable the transmission to last much longer. Bob
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ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
01-16-2013, 02:34 PM
#20
It's very hard to say what gains you will see with just 5 psi, because very few around here have ever gone with such a low boost setting. The blower will be spinning much slower than one that is set up build 7 to 8 psi of boost, that it won't start making boost until a much higher rpm. Because of the cost involved with tunes, pulleys and blower belts, I would initially get it set up to make 8 psi of boost, then short shift it until you get the transmission built. That way you'll have more usable boost lower in the rpm range, and it will keep cost down. You will still end up having to have the tune touched up for the new transmission and converter, but overall you'll still save money. the hardest thing on these automatics is to go wide open throttle when the car is in overdrive. Manually dropping it into 3rd before going wot will enable the transmission to last much longer. Bob
