| BananaBoy |
I've spent a lot of time on many sites but never really figured out what a vafc is. after reading the recent post about D'arcy's install, and seening the results, I'm interested.
What is it?
What does it do?
Where does it install?
What is the cost?
What are the expected gains?
Sorry for all the ???. Thanks in advance for replies. |
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| HKSpowers |
Vafc = V-Tec, Air, Fuel, Controller
Heres a brief explanation
It modifies manifold pressure signal and alters VTEC engagement point on Honda VTEC engines
The V-AFC features a user-definable, eight-point, adjustable fuel curve that can be set in 500 RPM increments. The range of fuel adjustment is +/- 50% at each of the user-defined setting points. The Fuel Adjustment function considers wide/narrow throttle and low/high camshaft settings, from which four different fuel maps are created (wide-low, wide-high, narrow-low, narrow-high). The integrated VTEC Controller adjusts the point at which the engine switches from the Lo to Hi cam during acceleration, as well as when the engine switches from the Hi to Lo cam during deceleration
Hope this helps
HKSpowers |
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| Xx D-MAN xX |
I'm not the most informative about this but I'll tell you what I know.
What is it? It's a VTEC Air Fuel Controller
What does it do? It gives you the ability to change your vtec engagement point and you can fine tune your air fuel ratio at different rpm ranges of your lvt and hvt points.
Where does it install? You have two options. One is to tap into your stock ECU wiring or the other (which I did) is get a custom wiring harness which has been pre-tapped. For option two, you just plug it in between the ecu and stock ecu wiring harness.
What is the cost? I think brand new, the VAFC retails between $500-$700. You could also find a used one for about $350.
What are the expected gains? Every car is different. Whether your car is stock or if you have bolt-ons (I/E/H/P) or if you're modified (turbo/supercharger). You won't know till you put your car on a dyno to properly tune your car.
If you have any other questions, talk to James Chan (98Luder) at PE Tuning Group. |
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| Copper |
| hmmmm..i'd be in for a group by, but not for a while though, def'n interested though, |
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| 98Luder |
basically you use it if you need to fine tune your car.
Thnk of getting an intake, header, exhasut. The air flow has changed but the amount of fuel the car is getting will remain the same. To fine tune and get it working to it's maximum potential you can fine tune the fuel with this tool(Vafc). That's all it is, it's a tool for you to fine tune your car.
You may also change your Vtec cross over point to gain back some power. Take a look at Darcy's dyno graph and you will know what i mean by gaining power back by lowering vtec a little. However, not every engine is the same so each car has to be tuned differently. You may use other ppl's settings, it maybe a okay but not exactly tuned for your paticular engine.
If you have more questions let us know, that's why we put up our own board/forum. |
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