Show me 964's with Varioram conversion PLS !
10-09-2013, 06:01 PM
#22
Race Car
no matter what the engine speed, Varioram optimizes engine performance (altering air mix/intro ram) to produce maximum driving response.
http://p-car.com/engine.htm
http://p-car.com/engine.htm
10-09-2013, 06:04 PM
#23
Nordschleife Master
There's a chart down the page that shows the benefit.
http://www.instant-g.com/Products/36...sion/VRAM.html
It's basically a 20% torque bump below 4k RPM.
http://www.instant-g.com/Products/36...sion/VRAM.html
It's basically a 20% torque bump below 4k RPM.
10-18-2013, 11:49 AM
#26
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If I have an entire variorum system and reprogrammed ECU and all the wiring, how difficult is this install? Is it worth doing? What cams are you running with this configuration?
10-18-2013, 04:03 PM
#27
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Jerry - let me know when. I'll be at Atlanta Motor Speedway for a Porsche Autocross on 9 and 17 Nov. Or you Are welcome to stop by the house anytime, The gain is well worth the pain. Torque improvement is unreal.
10-18-2013, 06:27 PM
#28
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Endo -
Install is not hard at all, think the hardest part for me was getting the throttle cable installed. Once the Varioram is in there is almost NO room to work. Would suggest backing off the motor mounts while you are doing the install to give you a little more room - all you can get you will need. - You have to make sure that you have all the correct sensors and the wiring for them that lead to the ECU. You will have to add some sensors as the Varioram needs to have the 3 internal flaps controlled to open and close at specific RPM ( need only to controls ). The standard 964 harness has only one control of this type. If you have a 993 harness it may have the wires and you will only need to add the solenoids to activate the flaps as they are vacuum controlled. You may also need a different throttle position sensor, I am not sure what is required by the 993. I changed over to a full position sensor - but I am not running a stock ECU.
YOU need to make sure that you have all the correct fuel, oil and breather lines to marry up with your stock configuration. A lot of these can be modified fairly ease. You will also need to grab a new air filter and 90 elbow that are the right size to marry up with the Varioram rubber intake fitting. Believe this 4 or 4 1/2 inch - much larger than our stock size.
Look on the 993 sight there is a good post on installing a Varioram on a 993.
Install is not hard at all, think the hardest part for me was getting the throttle cable installed. Once the Varioram is in there is almost NO room to work. Would suggest backing off the motor mounts while you are doing the install to give you a little more room - all you can get you will need. - You have to make sure that you have all the correct sensors and the wiring for them that lead to the ECU. You will have to add some sensors as the Varioram needs to have the 3 internal flaps controlled to open and close at specific RPM ( need only to controls ). The standard 964 harness has only one control of this type. If you have a 993 harness it may have the wires and you will only need to add the solenoids to activate the flaps as they are vacuum controlled. You may also need a different throttle position sensor, I am not sure what is required by the 993. I changed over to a full position sensor - but I am not running a stock ECU.
YOU need to make sure that you have all the correct fuel, oil and breather lines to marry up with your stock configuration. A lot of these can be modified fairly ease. You will also need to grab a new air filter and 90 elbow that are the right size to marry up with the Varioram rubber intake fitting. Believe this 4 or 4 1/2 inch - much larger than our stock size.
Look on the 993 sight there is a good post on installing a Varioram on a 993.
10-19-2013, 03:04 PM
#29
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Chris , I don't thinks it makes any difference to the install and definitely no difference in driveability. The biggest issue you will is making sure that the VRAM has all the right sensors on it and that the ECU wiring is connected to the correct sensors. Then you will have to make sure that the ECU is receiving input from the sensors and ECU is sending valid instruction to VRAM control modules.
