I finally raced a subaru
03-02-2009, 01:59 AM
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I finally raced a subaru on my way home from work with a buddy in the car. I see a lowered subaru wrx up ahead and told my friend that i wanted to run him because i haven't ran one b4.
We crusied at about 70 and i was seeing if he would downshift when i got next to him. He didn't so i said **** it, ill play with him. so i down shift to 4th at 80 and start teasing him. He finally downshifts and gives in.
He got the jump and jumped out about 1 and a half cars and im slowly reeling him in, by the time im at 125 im a half car ahead still pulling.
I thought i was gonna get beat. We came to a light and i asked him what he had done. He said upgraded turbo to 14lbs, down pipe, full exhaust, and intake. I was happy since my car only has a CAI and some race mufflers.
He then asked, is that an ls1?... I said yea. he said... Man, Those things are beasts! and we parted our seperate ways.
Anyways, not sure if i should be too proud of this kill. I dont know what these cars run stock or how many psi then run at stock. Dont know too much about the subaru's. He was alone too, and i had my 200lb friend. I know it would have been a different outcome if it was from a dig. Let me know whether or not this is a good kill in your opinon. Thanks
We crusied at about 70 and i was seeing if he would downshift when i got next to him. He didn't so i said **** it, ill play with him. so i down shift to 4th at 80 and start teasing him. He finally downshifts and gives in.
He got the jump and jumped out about 1 and a half cars and im slowly reeling him in, by the time im at 125 im a half car ahead still pulling.
I thought i was gonna get beat. We came to a light and i asked him what he had done. He said upgraded turbo to 14lbs, down pipe, full exhaust, and intake. I was happy since my car only has a CAI and some race mufflers.
He then asked, is that an ls1?... I said yea. he said... Man, Those things are beasts! and we parted our seperate ways.
Anyways, not sure if i should be too proud of this kill. I dont know what these cars run stock or how many psi then run at stock. Dont know too much about the subaru's. He was alone too, and i had my 200lb friend. I know it would have been a different outcome if it was from a dig. Let me know whether or not this is a good kill in your opinon. Thanks
03-02-2009, 06:56 AM
#5
^ Actually 14.5 psi is stock boost. Really no reason for him to be running that low of boost that I can think of. Unless he didn't have enough fuel for more boost. Good kill OP.
03-02-2009, 08:35 AM
#6
The same boost levels, with a larger turbo, would still yeild more power, no? Could be a "small" turbo, like STI turbo on a WRX (I believe they have different turbos). Good kills OP. When my friend mods up his 06 some more, I want a shot at him. His is a pretty decent little ride.
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03-02-2009, 10:16 AM
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why didnt you down shift to 3rd? i'm an auto driver but i would think you would be able to easily hit the sweet spot in 3rd and that woulda put you out on him much more IMHO.
03-02-2009, 10:52 AM
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The same boost levels, with a larger turbo, would still yeild more power, no? Could be a "small" turbo, like STI turbo on a WRX (I believe they have different turbos). Good kills OP. When my friend mods up his 06 some more, I want a shot at him. His is a pretty decent little ride.
The difference is how much air flow a specific turbo can make, and also WHEN that turbo can supply 14psi to the engine... smaller one will supply it quicker, but may not be able to supply a big engine with 14psi of air at 6500 rpms... a large one will take longer to get moving, and therefore take longer to get that 14psi to the motor, but will be able to sustain that psi for longer....
good kill OP
03-02-2009, 11:23 AM
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No.... doesn't matter how large of a turbo, at the same boost level, the car is going to make the same power.... think about it - with the smaller turbo, it has to spin faster to supply 14psi, but as long as the motor is seeing that 14psi, then its going to make X hp... with a larger turbo, it won't have to work as hard, but as long as 14psi is going into the engine, then X hp is what's going to be made....
The difference is how much air flow a specific turbo can make, and also WHEN that turbo can supply 14psi to the engine... smaller one will supply it quicker, but may not be able to supply a big engine with 14psi of air at 6500 rpms... a large one will take longer to get moving, and therefore take longer to get that 14psi to the motor, but will be able to sustain that psi for longer....
good kill OP
The difference is how much air flow a specific turbo can make, and also WHEN that turbo can supply 14psi to the engine... smaller one will supply it quicker, but may not be able to supply a big engine with 14psi of air at 6500 rpms... a large one will take longer to get moving, and therefore take longer to get that 14psi to the motor, but will be able to sustain that psi for longer....
good kill OP
So 14 psi in a 1" tube is the same CFM as 14 psi in a 4" tube? No, sorry you are wrong. It is much more CFM in a larger turbo, and im surprised no one has said anything about that. I work with a mechanical engineer and had him school me at this before. . .
03-02-2009, 11:39 AM
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You're "tube" comparison would be similar to a change in heads (or intake manifold, etc etc).... 14psi on a X head will make the same horsepower as 10psi on Y head, b/c Y head flows more air, adn the pressure needed to make a certain horsepower is less....
so you're either confused about yoru friends argument, or he needs to go back to school.... i built a turbo car, and if you knew anything about my profession, you'd know that math is not my weak point....
want me to make it clearer? a small turbo may have to spin at 15,000 rpm to make 500cfm of air, while a large turbo only has to spin 10,000 rpm to make 500cfm of air... either way, 500cfm of air is going into the intake manifold, at which point the wastegate is opening to keep the turbo from spinning any faster..... lets assume that this 500cfm of air is making 14psi in the motor, and thus the engine makes 10,000hp (ricer math
) ... then no matter which turbo its coming from, its still only getting 500cfm (14psi) so its going to make 10,000 hp Last edited by SonofaBish; 03-02-2009 at 11:46 AM.
03-02-2009, 11:43 AM
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but in this case, we're comparing turbo to turbo
03-02-2009, 11:47 AM
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Ok that actually makes more sense. But if you were to measure PSI in the turbo, the size would make a difference correct? He just explained it to me quickly one day, but what you said does make sense, because the pressure sensor is not in the turb.
03-02-2009, 11:52 AM
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now go school your co-worker...
and tell him an Actuary sent you! lol
03-02-2009, 11:54 AM
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and honestly, i don't know that there's anyway to measure the psi "in the turbo"... the turbo is going to flow a certain amount of air at a certain rpm... something is making me want to say that you can't measure the psi until the airflow meets some sort of resistance - e.g. an intercooler or an intake manifold, etc.
03-02-2009, 12:06 PM
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... just remember it, that way you can school dudes when they come spewing **** out their asses.... you know, the type of d-bags that would sit here and argue with you for the sake of arguing...
03-02-2009, 12:11 PM
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haha 