vpc tuning
- Thread starter supra_ed
- Start date
supra_ed;1331414 said:
theres really not much RPM tuning involved with the vpc.
GAIN: you can only tune the whole fuel curve up or down 2% per click
RESPONSE: tunes the fuel delivery on initial opening of throttle
IDLE: tunes idle
if using it with the afc neo just wire it up the similar to how the safc is wired
i prefer to use the GCC because it just plugs right in
thanks. it seems to be running way fat at idle and cruising or when letting off throttle. i turned idle knob all the way lean. goes lean under heavy throttle high rpm. i guess just takes a lot of time to dial in. not a lot of dynos around here can tune with vpc.
MK3Brent;1331793 said:
somebody else said that also. but i got 272s and .040 over which i think is attributing to my problems. got a good rough tune last night. it cruises around 11.5-12.5 afr. hit the gas it leans out to 14.0. turbo spools (laggy) and it falls to 10.0. last night was first time i ran it past 4500rpm. despite overly rich, it really took off lol
272's are a large cam, the overbore isn't really a concern.
You probably need to consider a stand alone sooner than later. (Noting your AEM comment.)
Are you sure you have your cams degreed and set correctly?
What size injectors are you using?
You probably need to consider a stand alone sooner than later. (Noting your AEM comment.)
Are you sure you have your cams degreed and set correctly?
What size injectors are you using?
only 550s. i have greddy 720s but vpc really didnt like those. i havent degreed cams. set to stock. i was just looking into that. have any suggestions? most people are saying +3ex/-1in for 264s. car idles at a rich 1000ish rpm. sounds like a built small block.
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I'd say your cams are the source of your AFR problems to begin with.
I have 550's right now and can cruise and idle as lean as I want. (Stock cams.)
What's your base fuel pressure set at?
A quick test would be to throw some stock cams back in and note the difference.
You are indeed running the AFC with the VPC, correct?
Confirm your wiring?
I have 550's right now and can cruise and idle as lean as I want. (Stock cams.)
What's your base fuel pressure set at?
A quick test would be to throw some stock cams back in and note the difference.
You are indeed running the AFC with the VPC, correct?
Confirm your wiring?
I can't offer too much help with the cams with a piggy back fuel management.
Confirm you've wired up your afc to this diagram.
That way you know for sure that it's going from the MAP sensor, to the AFC, then to the ECU.
Confirm you've wired up your afc to this diagram.
That way you know for sure that it's going from the MAP sensor, to the AFC, then to the ECU.
From what I gathered, that resistor will help eliminate the code 24(?) for open air intake temp. that the AFM is no longer serving.
I haven't used one either.
I haven't used one either.