Utah Evos
so stomper don't be dissapointed to run 114-115mph in the 1/4 mi. with your current setup seth ran that fast but he had a aem & a few things you don't like a 10.5 hotside also i think..
even a google engineer like me knows that turbo's have a maximum flow rate.
Originally Posted by www.TurboByGarrett.com
What is my mass flow rate? As a very general rule, turbocharged gasoline engines will generate 9.5-10.5 horsepower (as measured at the flywheel) for each lb/min of airflow. So, an engine with a target peak horsepower of 400 Hp will require 36-44 lb/min of airflow to achieve that target. This is just a rough first approximation to help narrow the turbo selection options.
Whoa, man, <nachoLibre>Take it eassay</nachoLibre>.
Okay, so 20% is probly a little high. I don't think that 10% is a stretch though. Dynojets are notoriously high reading, since their method of measure is so inaccurate. Most dynos (that are realistic) measure torque (which is a valid measure of energy) where the dynojet just takes a set formula and measures how long it takes to spin their giant drum up to a certain speed. The torque number on a dynojet is derived from the horsepower number. This is opposite to the way it should be done. This is also the reason why the newer dynojets have gone away from this method and have now gone similar to a mustag dyno (more reliable and accurate results).
The Dynapack Dyno uses hydraulic pumps to measure the amount of energy (torque) that is being created at the wheels. This is much more accurate. The horsepower number (which we all know is a function of torque and RPM is then calculated from that figure.
Okay, so 20% is probly a little high. I don't think that 10% is a stretch though. Dynojets are notoriously high reading, since their method of measure is so inaccurate. Most dynos (that are realistic) measure torque (which is a valid measure of energy) where the dynojet just takes a set formula and measures how long it takes to spin their giant drum up to a certain speed. The torque number on a dynojet is derived from the horsepower number. This is opposite to the way it should be done. This is also the reason why the newer dynojets have gone away from this method and have now gone similar to a mustag dyno (more reliable and accurate results).
The Dynapack Dyno uses hydraulic pumps to measure the amount of energy (torque) that is being created at the wheels. This is much more accurate. The horsepower number (which we all know is a function of torque and RPM is then calculated from that figure.
First off, you are so far off saying that the Dynojet is inaccurate. Unrealistic, maybe, inaccurate...NO. First off, the Dynojet is the only dyno doing a direct measurement of power. The drum has a know inertia. Toss a positioning sensor system on that drum and team it up with a time reference and you can now DIRECTLY measure power. POWER is what moves the car, because torque has no time relation and who cares if you can move 500 ft-lb if it takes you 20 minutes to do it. Horsepower is what moves the car, at least in anyway that means anything.
All those other dynos, yep, they indirectly measure a torque of one means or another, be it electrical power dissipation (Dynojet with load cell), hydraulic resistance (dyna-pak) or any other power dissipation means. So, you have just stated that a system that indirectly measures power through multiple systems with multiple losses is more accurate.
No, for what I was saying and dynojets being unrealistic, yeah. It has something to do with the fact that you are accelerating a load that does not match the load that the motor will actually see on the road. This can change some things. I know for a fact you can often run more boost and more aggressive timing on the dyno then what you can do on the road, so sure, there is the very real chance that you can make an unrealistic number on a dynojet. But there is the problem, most of those Dyno's you are praising have adjustable loads, they can be setup the same way. Or they can be setup to load the car more heavily then what the car will really see and the power numbers are low. Hence the reason people don't like using load based dynos as a power bragging standard...the LOAD CN BE MANIPULTATED!!!
Further more, many of those dynos do not directly read engine RPM. They approximate the engine RPM through wheel (or hub) speed and then calculate the engine RPM based on gear ratios. Guess what? Get it wrong (unintentionally or intentionally) and you can GREATLY skew the numbers.
Stomper's car is far from stock. The turbo is stock, yes, but that is about it. But even though the motor is built now, it made 390 when it was stock. We know the reason he didn't make more power was due to the turbo.
Perhaps you should read up on alky injection and its effects on octane (effective octane), iat's, and the ability to run more boost and timing (due to increased effective octane).
Perhaps you should read up on alky injection and its effects on octane (effective octane), iat's, and the ability to run more boost and timing (due to increased effective octane).
Trust me though, I don't need to do any research on Methanol...
The uncorrected number is an accurate description of what power he is actually making at this altitude. That is the most accurate number. But to compare with guys at sea level and elsewhere, the corrected number is accepted as the horsepower of the car, since anything from a low-pressure to high-pressure, temperature and humidity can have significant effects on the uncorrected number. Do you think that the CA guys are posting uncorrected numbers? You should see all the sensors and probes the Dynapack has on it...lol.
I'm not trying to be condescending, or hate or anything like that, just trying to explain and answer the questions that you posed in your post. I welcome any comments or questions.
I'm not trying to be condescending, or hate or anything like that, just trying to explain and answer the questions that you posed in your post. I welcome any comments or questions.
Ah, let me explain something about correction factors. THEY ARE BASED ON THE STANDARD ATMOSPHERE!!! When you start running boost or an oxidizer, you are no longer ingesting a standard atmosphere. Correction factors are unrealistic on FI motors. If you want to compare to sea level guys, post the uncorrected numbers and a "relative" boost level. FYI, our local ambient pressure averages 12.4 PSIA. Add that to your boost pressure, subtract 14.7 PSI and you have an equivalent manifold pressure to a sea level car.
Now, screw this noise, I've got Heat Transfer homework to do.
Do it for victims of street racing? Just another idea...
Anyway, I'm sure plenty of people would be down if you got it organized properly and such (meaning it isn't 200 dollars for 20 min of track time and you get the word out).
Oh yeah, and who cares what numbers your car does? 300 400 350 whatever. And who cares whether its possible or not? Does it really make your penius feel smaller for someone to say they do 400 whp at 4200' when you have better mods and only do 300 whp, or think it isn't possible? Or do I really have to post that stupid picture of the special olympics (you all know what I"m talking about)
P.S. Heat Transfer is a ***** and I'm glad I'm not taking it. But I do have two tests to study for, and a "paper" to write for Social Structure.
Anyway, I'm sure plenty of people would be down if you got it organized properly and such (meaning it isn't 200 dollars for 20 min of track time and you get the word out).
Oh yeah, and who cares what numbers your car does? 300 400 350 whatever. And who cares whether its possible or not? Does it really make your penius feel smaller for someone to say they do 400 whp at 4200' when you have better mods and only do 300 whp, or think it isn't possible? Or do I really have to post that stupid picture of the special olympics (you all know what I"m talking about)
P.S. Heat Transfer is a ***** and I'm glad I'm not taking it. But I do have two tests to study for, and a "paper" to write for Social Structure.
Last edited by UT_Evo; Feb 8, 2007 at 10:31 PM.
He's going to have to make a "bit" more HP to break the power numbers I've made. So I really don't think ***** comparisions is the issue here.
I'm just trying to straighten out some misinformation.
But it should be interesting to see how I do with the stock turbo on my car, as I have a few parts to make some power with and 7 years of 4G63 tuning in the bag...
Thus far, Fluids has still be about the worst class I've taken. But I had a ****TY instructor (Meredith Metzger). Ameel (if you go to the U) is teaching Heat transfer and he is a very good instructor, IMO.
I'm just trying to straighten out some misinformation.
But it should be interesting to see how I do with the stock turbo on my car, as I have a few parts to make some power with and 7 years of 4G63 tuning in the bag...
Thus far, Fluids has still be about the worst class I've taken. But I had a ****TY instructor (Meredith Metzger). Ameel (if you go to the U) is teaching Heat transfer and he is a very good instructor, IMO.
He's going to have to make a "bit" more HP to break the power numbers I've made. So I really don't think ***** comparisions is the issue here.
I'm just trying to straighten out some misinformation.
But it should be interesting to see how I do with the stock turbo on my car, as I have a few parts to make some power with and 7 years of 4G63 tuning in the bag...
Thus far, Fluids has still be about the worst class I've taken. But I had a ****TY instructor (Meredith Metzger). Ameel (if you go to the U) is teaching Heat transfer and he is a very good instructor, IMO.
I'm just trying to straighten out some misinformation.
But it should be interesting to see how I do with the stock turbo on my car, as I have a few parts to make some power with and 7 years of 4G63 tuning in the bag...
Thus far, Fluids has still be about the worst class I've taken. But I had a ****TY instructor (Meredith Metzger). Ameel (if you go to the U) is teaching Heat transfer and he is a very good instructor, IMO.
what are your mods?
i'm trying to max my stock turbo as well and have quite a bit of mods, but the only thing is we dont have a dyno anywhere near boise, closest is in slc i think
i might take advantage of the trip up there for gt live and have it dynoed to see where i'm at
And on to the real topic at hand: When are we going go-karting?
LOL ... smelly Chinese food .... yummy! My car is no longer registered. I think the MPRA race group may have a session during GT Live ... if so, then I'll most likely race in that.
Oh ... and for the GT live part open to street cars ... that seems likely to be full of idiots with very little track time. Are you sure you want to risk your car in that kind of session? Your call though.
He's going to have to make a "bit" more HP to break the power numbers I've made. So I really don't think ***** comparisions is the issue here.
I'm just trying to straighten out some misinformation.
But it should be interesting to see how I do with the stock turbo on my car, as I have a few parts to make some power with and 7 years of 4G63 tuning in the bag...
Thus far, Fluids has still be about the worst class I've taken. But I had a ****TY instructor (Meredith Metzger). Ameel (if you go to the U) is teaching Heat transfer and he is a very good instructor, IMO.
I'm just trying to straighten out some misinformation.
But it should be interesting to see how I do with the stock turbo on my car, as I have a few parts to make some power with and 7 years of 4G63 tuning in the bag...
Thus far, Fluids has still be about the worst class I've taken. But I had a ****TY instructor (Meredith Metzger). Ameel (if you go to the U) is teaching Heat transfer and he is a very good instructor, IMO.
I should be able to do it.But we will see.
So there are things that i have. There is not much more that i can up grade only the turbo.
Last edited by STOMPER!; Feb 9, 2007 at 07:53 AM.
You do get an hour for 75 dollars... which, put into comparison is about as much as you pay for SCCA... ~2 hours of driving = ~150 dollars. Plus, there's gotta be SOME locals representin' But it all comes back to the slicks.
And SolidAuto, I still have mine in a box, not necessarily for sale but I don't see many more reasons to keep them other than "if something happens," which happens to be a big reason, but PM me and let me know. They're '03s and they were on the car from March to August of '04 with some autocrossing (2 or 3 events and an IVR) on them.


