Jaxx Posted August 15, 2008 Report Share Posted August 15, 2008 You can make the car more stable at high speeds but not really create downforce (or reduce lift) with anything sensible looking like that.Making a big skidplate that closes off the engine bay from below also helps considerably with stabilizing airflow.aye. Volfo did this with his 850. he said that he got better gas mileage, more front end grip and better flow to the rad/IC. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted August 15, 2008 Report Share Posted August 15, 2008 love the antenna.Its probably less drag than the typical shark fin ones.aye. Volfo did this with his 850. he said that he got better gas mileage, more front end grip and better flow to the rad/IC.I would not even begin to attempt under trays and venturi panels without pressure transducers installed and logged. Link to comment Share on other sites More sharing options...
RZT5 Posted August 15, 2008 Report Share Posted August 15, 2008 someone correct me if i'm wrong...wouldnt lowering the front of the car while leaving the back stock create a vaccume under the car thus providing downforce (and a whole hell of alot of drag!)? Link to comment Share on other sites More sharing options...
Che'_Moderator Posted August 15, 2008 Report Share Posted August 15, 2008 someone correct me if i'm wrong...wouldnt lowering the front of the car while leaving the back stock create a vaccume under the car thus providing downforce (and a whole hell of alot of drag!)?No. You need pedotubes, pressure transducers, or shock potentiometers to know tha Link to comment Share on other sites More sharing options...
SH8KDWN Posted August 16, 2008 Author Report Share Posted August 16, 2008 Chuck, you are a Volvo god among men... Link to comment Share on other sites More sharing options...
jb242gt Posted August 16, 2008 Report Share Posted August 16, 2008 No. You need pedotubes, pressure transducers, or shock potentiometers to know thaFully agree. Being a flow freak I gotta throw in my 2 cents... You need to fully understand the flow dynamics before modification. Basically speaking, by lowering the front and leaving the rear high you are just creating drag aero-wise. Creating a vacuum requires trapping or diverting airflow. In order to create said suction you would need to drop the front to the pavement, skirt the sides (ala Chaparral 2J) and vent the wells. Say goodbye to driving around town...Creating downforce at a minimum of drag is serious engineering and tends to work against drivability on city streets at proper speeds... A splitter only helps lengthen the car, aerodynamically, when combined with proper underbody panels and venturis. Creating proper panels requires instalation of said pitot tubes, transducers and hours of tunnel time... Your best bet aero-wise is to clean up the flow over, around and under the car. A deep front spoiler ala 'R' bumper and lowering will help. Good luck. Link to comment Share on other sites More sharing options...
Chilled man Posted August 16, 2008 Report Share Posted August 16, 2008 No. You need pedotubes, pressure transducers, or shock potentiometers to know thabasicly only antique devices to test ? Glass and bead thermistor with a mutliple test row to do it correclty would look at www.ebtron.com to get the correct equipmentpitottubes are completely useless , and a pressure transducer is ancient technology at best. worst part about those two are you have to have the square footage to acutally messure correctly were with a ebtron unit you can just put it outside the car and messure the CFM going threw the unit. Link to comment Share on other sites More sharing options...
RZT5 Posted August 16, 2008 Report Share Posted August 16, 2008 No. You need pedotubes, pressure transducers, or shock potentiometers to know thapedotubes? cant say i've ever heard of those or even know what they are...and yes, obviously pressure transducers on all the surfaces of the car as well as shock potentiometers could allow you to measure every condition contributing to the total downforce as well as the effect of any change made to the body, and would give you enough information to be able to set up a decently performing race car bodyall i was saying was if you werent interested in measuring downforce and just wanted more of it for really cheap at the expense of drag you could just put lowering springs on the front of the car and leave the back at stock ride height and you would create much more downforce than stock. I've seen enough fluid dynamics to be pretty sure this would work Link to comment Share on other sites More sharing options...
RZT5 Posted August 16, 2008 Report Share Posted August 16, 2008 Fully agree. Being a flow freak I gotta throw in my 2 cents... You need to fully understand the flow dynamics before modification. Basically speaking, by lowering the front and leaving the rear high you are just creating drag aero-wise. Creating a vacuum requires trapping or diverting airflow. In order to create said suction you would need to drop the front to the pavement, skirt the sides (ala Chaparral 2J) and vent the wells. Say goodbye to driving around town...Creating downforce at a minimum of drag is serious engineering and tends to work against drivability on city streets at proper speeds... A splitter only helps lengthen the car, aerodynamically, when combined with proper underbody panels and venturis. Creating proper panels requires instalation of said pitot tubes, transducers and hours of tunnel time... Your best bet aero-wise is to clean up the flow over, around and under the car. A deep front spoiler ala 'R' bumper and lowering will help. Good luck.forgot to mention side skirts! but yes, my idea is a very crude solution with more drawbacks than gains Link to comment Share on other sites More sharing options...
Che'_Moderator Posted August 16, 2008 Report Share Posted August 16, 2008 basicly only antique devices to test ? Glass and bead thermistor with a mutliple test row to do it correclty would look at www.ebtron.com to get the correct equipmentpedotubes are completely useless , and a pressure transducer is ancient technology at best. worst part about those two are you have to have the square footage to acutally messure correctly were with a ebtron unit you can just put it outside the car and messure the CFM going threw the unit.LOL!Im not even going to waste my time owning you. Your statements are 100% retarded. Link to comment Share on other sites More sharing options...
Chilled man Posted August 16, 2008 Report Share Posted August 16, 2008 LOL!Im not even going to waste my time owning you. Your statements are 100% retarded. yeah I forgot spent the last 12 years selling and install this junk yeah no Pitot tubes are a joke anyone in the engineering field will tell that to you now , there a old technology that just needs to be forgotenand worst part is pitot tubes are run off a pressuretrance ducer wich one drop or temp to high or to low or litte bit to much humidiy and there off calibar. www.nist.com the guys who set the calibration for all this type of equipment used in hosptial to wind tunnels to what ever stricly use ebtron to set the calibration for this other equipment . Link to comment Share on other sites More sharing options...
Chilled man Posted August 16, 2008 Report Share Posted August 16, 2008 And its Pitot tube its not a tube that molests little kids Link to comment Share on other sites More sharing options...
Che'_Moderator Posted August 16, 2008 Report Share Posted August 16, 2008 and worst part is pedo tubes are run off a pressuretrance ducer wich one drop or temp to high or to low or litte bit to much humidiy and there off calibar.Which is what you want for under the car. Its also why aircraft still use them. But lets compete you schooling. You didn't like shock potentiometers either. Thats too bad because thats what most of the ECUs have inputs or. And they are also the cheapest solution at only 300-400 for a set of 4. On and then there were the pressure transducers. They are still the standard for specing out a chassis. Correctly done they will tell you the load on each spring as well as the tension and load on different parts of the chassis and body. This is right up there with RO water is bad for you. Link to comment Share on other sites More sharing options...
Chilled man Posted August 16, 2008 Report Share Posted August 16, 2008 Which is what you want for under the car. Its also why aircraft still use them. But lets compete you schooling. You didn't like shock potentiometers either. Thats too bad because thats what most of the ECUs have inputs or. And they are also the cheapest solution at only 300-400 for a set of 4. On and then there were the pressure transducers. They are still the standard for specing out a chassis. Correctly done they will tell you the load on each spring as well as the tension and load on different parts of the chassis and body. This is right up there with RO water is bad for you.Hey I didnt say anything about shock potnitnwhatevers dont know anything about them.Look at your MAF on your car they use a very very very cheap Glass and bead thermistor, and using the airline industry is a horrilbe example due there ablity to really update there equipment And why would you use a pressure transducer for messuring load on a spring there use for messure airpressure in a system , not air volicty itself but the presusre differential between the incomming and behind the bafl in the transducerwich is messured by ...stagnation pressure = static pressure + dynamic pressure, Link to comment Share on other sites More sharing options...
Che'_Moderator Posted August 16, 2008 Report Share Posted August 16, 2008 Hey I didnt say anything about shock potnitnwhatevers dont know anything about them.Look at your MAF on your car they use a very very very cheap Glass and bead thermistor, and using the airline industry is a horrilbe example due there ablity to really update there equipment And why would you use a pressure transducer for messuring load on a spring there use for messure airpressure in a system , not air volicty itself but the presusre differential between the incomming and behind the bafl in the transducerwich is messured by ...stagnation pressure = static pressure + dynamic pressure,Load on each spring tells you the balance of the car. :arob: Link to comment Share on other sites More sharing options...
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