Discussion
The Torque flow has two elements to it. One is to enlarge the throttle plate in the plenum chamber, and this will give the instant result of making the car feel quicker for less throttle pedal movement, as it lets in more air. It wont however actually give you any more power unless your engine is highly tuned 5tr that is restricted by the Plenum inlet size- which brings us on to the next bit nicely, the AFM. The torque flow uses exactly the same electronic guts as the standard AFM, but with the airflow sensor now placed in a much larger aluminium tube. The idea is to reduce the possible bottle neck caused by the AFM (that becomes and issue at around 250 bhp plus), but in doing so it alters the voltage from the AFM for any given airflow, and the sensor mounting position is not ideal as it causes turbulence so the output is not that stable. This also means that the ECU will need re chipping to compensate for the new readings, but as we know this is not easily done. What Torque flow have done is taken stock TVR chips with different fuel maps, and tried to crudely match them to the new AFM response, but you can only go so far. The AFM electronics is then tweaked to try and get it nearer what the TVR fuel map needs. This involves lot of road testing and tweaking of resistors until the car runs somewhere near correctly. Please take into account the ECU can also make +/- 20 fuelling corrections so it can take a lot of abuse this way, but will simply makes the car a pig to drive as it reaches its limits and this very analogue approach means each Torque flow is matched to each car. I have not worked on one of these in the last couple of years, so its possible they have improved over the example I saw, but I would not recommend it if they have not. If you have a 270+ BHP car an enlarged AFM can gain a few horse power, and a much more precise way of getting the fuelling correct and increased airflow is to simply use a Bosch AFM, and the correct fuel map chip from Mr Adams or ACT, no messing about.
Edited by blitzracing on Monday 15th November 20:20
[the dyno at the Griff' growl commented that it was one of the best fuelled 450's he'd seen].Gassing Station | Chimaera | Top of Page | What's New | My Stuff