VIDEO & Photo's - IS350 Supercharger Install
10-26-09, 04:59 PM
#226
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thats why i said according to the page. id love to make that much power but they said they wouldnt dyno till after sema. makes me think they used hypothetical numbers from the R&D
10-26-09, 06:12 PM
#227
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Theoretical at 6 psi (20.696 PSIA) and 100% efficiency is 431 crank hp. They're claiming a little less.
10-26-09, 07:35 PM
#228
That's about double the reported results of the LMS kit at 5 lbs of boost AFAIK... and about 1.7x more rwhp than the TOMs kit running 5.8 lbs of boost WITH an ECU tune adds...which is a bit odd.
Last edited by Kurtz; 10-26-09 at 07:39 PM.
10-26-09, 09:24 PM
#230
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did fox say something about the intercooler they where using was "choking" the air going thru it. sounds plausable to me, but i kinda doubt the other companys would've used intercoolers that "choked" airflow going from the turbo to the throttle body. anybody have anything to say about that? enlighten me cuz i honestly don't know haha
Edit: found the quote
^^ i'd hope that would have truth and allow them to make their gains they claimed. but then again if it was that simple why didn't LMS do it.
Edit: found the quote
^^ i'd hope that would have truth and allow them to make their gains they claimed. but then again if it was that simple why didn't LMS do it.
Last edited by xuningshen; 10-26-09 at 09:29 PM.
10-26-09, 09:31 PM
#231
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That'd put their 405 claim at 94% efficiency.... and work to around 348 at the wheels...(given the ~14% drivetrain loss that seems about right on stock IS350 dynos... 306 crank usually dynos in the 260-265 range) an increase of roughly 85 rwhp
That's about double the reported results of the LMS kit at 5 lbs of boost AFAIK... and about 1.7x more rwhp than the TOMs kit running 5.8 lbs of boost WITH an ECU tune adds...which is a bit odd.
That's about double the reported results of the LMS kit at 5 lbs of boost AFAIK... and about 1.7x more rwhp than the TOMs kit running 5.8 lbs of boost WITH an ECU tune adds...which is a bit odd.
10-26-09, 10:48 PM
#232
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So there's a whole lot more to solving the problem than simple pressure readings. 6 psi at what intake temperature? The reality is, the SC is probably about 80% efficient converting mechanical energy into airflow because the compressor design is a lot like a turbocharger. Any force induction device only moves air, but in the process of moving the air, it adds heat. If the charge cooler in the LMS kit and the Tom's kit are smallish, the pressure reading is going to be more heat related than it will be actually moving air. Heated air is less dense and makes less power because there are fewer oxygen molecules for the fuel to use. If Fox is using a bigger unit, the 6 psi may be more flow and less temperature, so it will make more power even though the pressure reading is the same because the intake air temperature is lower. This also helps a lot with the high compression ratio because the cooler the intake air the more heat it will absorb on compression and the less likely the engine is to detonate.
The only way to really measure forced induction and make fair comparisons is to use mass flow, not pressure. It's a lot more arithmetic, but your results are a lot more predictable.
This is pretty simplistic, but should get the idea across. There's still a lot more to the physics of what's happening and why it does or doesn't work.
The only way to really measure forced induction and make fair comparisons is to use mass flow, not pressure. It's a lot more arithmetic, but your results are a lot more predictable.
This is pretty simplistic, but should get the idea across. There's still a lot more to the physics of what's happening and why it does or doesn't work.
10-26-09, 10:53 PM
#233
So there's a whole lot more to solving the problem than simple pressure readings. 6 psi at what intake temperature? The reality is, the SC is probably about 80% efficient converting mechanical energy into airflow because the compressor design is a lot like a turbocharger. Any force induction device only moves air, but in the process of moving the air, it adds heat. If the charge cooler in the LMS kit and the Tom's kit are smallish, the pressure reading is going to be more heat related than it will be actually moving air. Heated air is less dense and makes less power because there are fewer oxygen molecules for the fuel to use. If Fox is using a bigger unit, the 6 psi may be more flow and less temperature, so it will make more power even though the pressure reading is the same because the intake air temperature is lower. This also helps a lot with the high compression ratio because the cooler the intake air the more heat it will absorb on compression and the less likely the engine is to detonate.
The only way to really measure forced induction and make fair comparisons is to use mass flow, not pressure. It's a lot more arithmetic, but your results are a lot more predictable.
This is pretty simplistic, but should get the idea across. There's still a lot more to the physics of what's happening and why it does or doesn't work.
The only way to really measure forced induction and make fair comparisons is to use mass flow, not pressure. It's a lot more arithmetic, but your results are a lot more predictable.
This is pretty simplistic, but should get the idea across. There's still a lot more to the physics of what's happening and why it does or doesn't work.
So that means FOX's claims of a bigger intercooler giving them more HP seems to be valid (in theory). Can't wait for the dyno numbers!!
10-26-09, 11:11 PM
#235
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IS350 Supercharger Install
Hey guys...................
The noise can be easily fixed by recirculate it back to the intake side.
What’s with all these negative comments?
ddquach wasn't driving the car in that video, it was zach.
he lefted in gear with high rpm didn't shift up as result supercharger is generating boost but throttle is closed. that is why it sounds like that.
and
and wtf is with this comment?
Quote:
doesnt sound good at all..and I highly doubt its 400 HP either....
what about
"i doubt u'll ever be able to afford a fully loaded is350 and be able to mod it"
come on guys...............
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Sunny
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The noise can be easily fixed by recirculate it back to the intake side.
What’s with all these negative comments?
ddquach wasn't driving the car in that video, it was zach.
he lefted in gear with high rpm didn't shift up as result supercharger is generating boost but throttle is closed. that is why it sounds like that.
and
and wtf is with this comment?
Quote:
doesnt sound good at all..and I highly doubt its 400 HP either....
what about
"i doubt u'll ever be able to afford a fully loaded is350 and be able to mod it"
come on guys...............
________________________________________
Sunny
online jobs
10-27-09, 12:19 AM
#236
So there's a whole lot more to solving the problem than simple pressure readings. 6 psi at what intake temperature? The reality is, the SC is probably about 80% efficient converting mechanical energy into airflow because the compressor design is a lot like a turbocharger. Any force induction device only moves air, but in the process of moving the air, it adds heat. If the charge cooler in the LMS kit and the Tom's kit are smallish, the pressure reading is going to be more heat related than it will be actually moving air. Heated air is less dense and makes less power because there are fewer oxygen molecules for the fuel to use. If Fox is using a bigger unit, the 6 psi may be more flow and less temperature, so it will make more power even though the pressure reading is the same because the intake air temperature is lower. This also helps a lot with the high compression ratio because the cooler the intake air the more heat it will absorb on compression and the less likely the engine is to detonate.
The only way to really measure forced induction and make fair comparisons is to use mass flow, not pressure. It's a lot more arithmetic, but your results are a lot more predictable.
This is pretty simplistic, but should get the idea across. There's still a lot more to the physics of what's happening and why it does or doesn't work.
The only way to really measure forced induction and make fair comparisons is to use mass flow, not pressure. It's a lot more arithmetic, but your results are a lot more predictable.
This is pretty simplistic, but should get the idea across. There's still a lot more to the physics of what's happening and why it does or doesn't work.
10-27-09, 08:32 PM
#238
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http://www.autoblog.com/2009/10/26/s...he-road-to-si/
apparently they're boosting at 6 psi and making roughly 400 hp to the crank..... so says the article
edit: oops fixed the link
apparently they're boosting at 6 psi and making roughly 400 hp to the crank..... so says the article
edit: oops fixed the link
"Lexus' internal tuning division was tapped to supply the stoppers,..."
Can someone explain to me what this means.
10-27-09, 08:39 PM
#240
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Just a fancy/roundabout way to say it.