whp gain with just MBC?
Jul 12, 2005, 08:56 PM
#2
Originally Posted by Dr. SS
how much whp can u pick up on average on a stock evo with a MBC set at 20-21 psi?
Jul 12, 2005, 09:14 PM
#3
Originally Posted by Warrtalon
On an 03-04, I think you can pick up anywhere from 20-40whp, but it depends on other factors, such as the BOV and how it affects your AFR/timing. Sometimes, too much boost can cause you to lean out to the point of causing knock, which would retard timing and rob power. Generally, though, since the Evo is so rich on the top end from the factory, increasing boost to 20-21 adds hp from both perspectives: increased boost and better AFR/timing as a result of less rich conditions.
lol
with MBC, 03' set at 20 to 21 psi, if you're talking about peak whp, you'll actually loose some, but that doesn't mean you'll go slower.
the torque and whp line will go up up top RPM, because it'll be more constant boost then without mbc when it peaks high and falls low below 20psi.
So you're actually looking at about the same whp, but faster 1/4 mile times.
Jul 12, 2005, 09:18 PM
#4
Originally Posted by plokivos
in other words, you don't know.
lol
with MBC, 03' set at 20 to 21 psi, if you're talking about peak whp, you'll actually loose some, but that doesn't mean you'll go slower.
the torque and whp line will go up up top RPM, because it'll be more constant boost then without mbc when it peaks high and falls low below 20psi.
So you're actually looking at about the same whp, but faster 1/4 mile times.
lol
with MBC, 03' set at 20 to 21 psi, if you're talking about peak whp, you'll actually loose some, but that doesn't mean you'll go slower.
the torque and whp line will go up up top RPM, because it'll be more constant boost then without mbc when it peaks high and falls low below 20psi.
So you're actually looking at about the same whp, but faster 1/4 mile times.
Jul 12, 2005, 09:30 PM
#6
Originally Posted by joeymia
MBC is an awesome mod. I set mine to 21 PSI and it never stops pulling. I bounced off my rev limiter a few times while getting used to it. The RPM flys past 4k now. I got the Halman Pro which lets you control the MBC inside the car.
Jul 12, 2005, 09:31 PM
#7
You sure do go ape shlt quick over nothing. yelling and screaming.
<--- warrtalon.
I have the pro rx evo. That's the one with ceramic ball, and in-cockpit.
<--- warrtalon. I have the pro rx evo. That's the one with ceramic ball, and in-cockpit.
Originally Posted by Warrtalon
Uh what? Yes, I do know. What the heck are you talking about? You think people lose peak whp with an MBC set higher than stock? That's crazy talk. I only gave a range of 20-40, because not every car is the same and not every person has the same mods. 03/04s can definitely gain 40whp with an MBC. It's absurd to say that an increase in 1-2psi peak boost and 4-5psi from 5500-7500 will LOWER peak whp. It will increase greatly, ESPECIALLY above 5500rpm.
Trending Topics
Jul 12, 2005, 09:38 PM
#9
Originally Posted by plokivos
You sure do go ape shlt quick over nothing. yelling and screaming.
<--- warrtalon.
<--- warrtalon.
Jul 12, 2005, 09:59 PM
#10
well, even to start out with telling me I'm making an absurd comment, you're being absurd, since you obviously are not considering how finiky the stock boost system is.
The stock boost peaks unmistably. They tend to peak upto 23 psi on a cooler days then fall down at around 4500 rpm when the AFR ratio changes and dips down below 10~9.
now considering what i said, your peak whp and tq isn't going to be more, since the stock boost peak is going to dictate the peak whp and tq around 3500~4000 rpm.
Once you get the MBC, you're controlling the peak whp and tq since you're not letting it peak 2 to 4 psi over the stock boost point which is around 19.5psi.
However, you're getting a consistant boost throughout the powerband all the way to the redline, which mean, you are going to get a faster 1/4 mile time, however, your peak whp and tq is either going to stay at your current level or drop slightly.
Now, it all depends on the weather and especially whether or not you have a TBE and other supporting mods, but the fact is that stock boost is irratic and MBC stabilizes that.
So, I think you should read some more about MBC before calling me absurd.
And stop going ape poopie on people. you're not that great as you think you are, flunting all over this forum.
lol
The stock boost peaks unmistably. They tend to peak upto 23 psi on a cooler days then fall down at around 4500 rpm when the AFR ratio changes and dips down below 10~9.
now considering what i said, your peak whp and tq isn't going to be more, since the stock boost peak is going to dictate the peak whp and tq around 3500~4000 rpm.
Once you get the MBC, you're controlling the peak whp and tq since you're not letting it peak 2 to 4 psi over the stock boost point which is around 19.5psi.
However, you're getting a consistant boost throughout the powerband all the way to the redline, which mean, you are going to get a faster 1/4 mile time, however, your peak whp and tq is either going to stay at your current level or drop slightly.
Now, it all depends on the weather and especially whether or not you have a TBE and other supporting mods, but the fact is that stock boost is irratic and MBC stabilizes that.
So, I think you should read some more about MBC before calling me absurd.
And stop going ape poopie on people. you're not that great as you think you are, flunting all over this forum.
lol
Originally Posted by Warrtalon
I don't think I went ape shlt or did any yelling or screaming. You made an absolutely absurd comment that is nowhere close to being right, so I corrected it. In the process of making this absurd comment, you also accused me of not knowing what I was talking about. Not that this is an impossibility, but I do know about things as basic as an MBC, and I think it's proper to respond fervently when someone claims that raising boost will LOWER peak whp...
Jul 12, 2005, 10:12 PM
#11
Originally Posted by plokivos
now considering what i said, your peak whp and tq isn't going to be more, since the stock boost peak is going to dictate the peak whp and tq around 3500~4000 rpm.
Once you get the MBC, you're controlling the peak whp and tq since you're not letting it peak 2 to 4 psi over the stock boost point which is around 19.5psi.
However, you're getting a consistant boost throughout the powerband all the way to the redline, which mean, you are going to get a faster 1/4 mile time, however, your peak whp and tq is either going to stay at your current level or drop slightly.
Once you get the MBC, you're controlling the peak whp and tq since you're not letting it peak 2 to 4 psi over the stock boost point which is around 19.5psi.
However, you're getting a consistant boost throughout the powerband all the way to the redline, which mean, you are going to get a faster 1/4 mile time, however, your peak whp and tq is either going to stay at your current level or drop slightly.
If you go make a trip down the drag strip where you don't go below 5500rpm, you will see that the stock boost does not go over 19.5psi, and it will taper almost immediately down to the built-in taper point of 16psi. If you do this same thing with an MBC set to 20-21 psi, it will hit 21 (or wherever you set it) and then taper slightly to 20 or 19.5 due to the inability of the stock turbo to maintain that full boost beyond 7k rpm. It is not in any way reasonable to believe that the 2nd scenario would be making LESS peak horsepower. It will not only make a lot more peak horsepower, but it will also make a lot more horsepower across the entire rpm range...
Last edited by Warrtalon; Jul 12, 2005 at 10:16 PM.
