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Originally posted by CMiS2K yes, the ECU will see normal pressure. From what I can tell the pressure never reads over 2.5XXX volts on the vafc. You want the VAFC to still be able to read pressure, but you want to keep it from seeing boost, if the vafc sees more pressure than normal then it is seeing boost and then the ECU will get the reading and it will freak out.
I'm confused now?!?!?
Surely it's fine if the V-AFC sees positive manifold pressure, so long as the ECU doesn't. So the VAFC goes upstream of the voltage clamp. It sees boost, but the voltage clamp ensures that the ECU doesn't.
Alternatively, you would mount the voltage clamp upstream of the V-AFC and that way neither the ECU nor V-AFC sees boost (capped at 2.7V).
[QUOTE]Originally posted by Yellow Streak
[B]Regarding the V-AFC, and I can only speak in Comptech terms, your MAP signal (in bone stock form) goes directly to the ECU.
This is correct
To maintain this flow/sequence, the white wire (pin #17) on the VAFC harness branching off to the VAFC should be sliced. The Vortech MAP controller bridged this place.
I also tapped the black and red wire from the VAFC branch off to get power for the MAP and timing controllers.
So far so good....no SRS or CEL light yet.
The harness makes life a lot easier. Always use the harness before you tap the ECU wires. So if you stuff it up you can still get another harness
You are so right thanks for taking the chance on stuffing it up.
I just dyno'd tonight 297.9 whp and 181.4
The vortech FMU is making my car run very lean. I may order and use a different disk to richen things up a little. I used the VAFC to add fuel and stablize the A/F ratios. I had a 16.0 spike around 6500 rpms and the a/f was all over the place. We continued to tweak things and stablized A/F at 12.3 with a 13.0 spike once the car was warm.
I recall loosing power when I lowered my VTEC egagement point below 5800 when I had the AEM. The pattern of the graph look very similar to your.....not as high reading of course but the dip between VTEC on until 5.5krpm.
Have you tried any run with Vtec on at 5800 or above?
Why did you chose this lowered VTEC on value?
Thanks in advance for your feedback CMiS2K.
It's a good number by the way
