VTEC Controller
Bottle? What bottle?
Joined: Nov 2003
Posts: 63
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From: MPLS, MN
Originally posted by lildrgn
The reason you feel vtec more on the H22 than say a B18 is because our secondaries open almost at the exact same time.
And yes, if some one falls out of vtec, it will hurt their times.
Most people do not alter the H22 vtec engagement much (maybe 100 or 200 at most)
The reason you feel vtec more on the H22 than say a B18 is because our secondaries open almost at the exact same time.
And yes, if some one falls out of vtec, it will hurt their times.
Most people do not alter the H22 vtec engagement much (maybe 100 or 200 at most)
Bottle? What bottle?
Joined: Nov 2003
Posts: 63
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From: MPLS, MN
Originally posted by lildrgn
Your secondaries should open up around 4900 I think.
Your secondaries should open up around 4900 I think.
Registered User
Joined: Jan 2004
Posts: 31
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Originally posted by MNludeDVR
right, but does the GSR's secondaries open at 5500? i know they don't open at 4900, so i'm thinking it's an h22a base program but the secondary engagement and vtec is still the same as the GSR...
right, but does the GSR's secondaries open at 5500? i know they don't open at 4900, so i'm thinking it's an h22a base program but the secondary engagement and vtec is still the same as the GSR...
I am guessing that it is not tuned???
Senior Member
Joined: Jun 2002
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Hey guys, I have a question, and this may sound dumb but someone asked me this and I didn't have an answer for him. He is running a turbo on his H23 auto tranny. He just bought the H22 long block. He said that he is running his H23 ECU with the VAFC and everything is running correctly.
Is it possible to run an H22 engine with an H23 ECU with the VAFC and still have VTEC work and perform correctly??
Thanks.
Is it possible to run an H22 engine with an H23 ECU with the VAFC and still have VTEC work and perform correctly??
Thanks.
Registered User
Joined: Jan 2004
Posts: 31
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Originally posted by NoShoAccord
Hey guys, I have a question, and this may sound dumb but someone asked me this and I didn't have an answer for him. He is running a turbo on his H23 auto tranny. He just bought the H22 long block. He said that he is running his H23 ECU with the VAFC and everything is running correctly.
Is it possible to run an H22 engine with an H23 ECU with the VAFC and still have VTEC work and perform correctly??
Thanks.
Hey guys, I have a question, and this may sound dumb but someone asked me this and I didn't have an answer for him. He is running a turbo on his H23 auto tranny. He just bought the H22 long block. He said that he is running his H23 ECU with the VAFC and everything is running correctly.
Is it possible to run an H22 engine with an H23 ECU with the VAFC and still have VTEC work and perform correctly??
Thanks.
#212
Joined: Jun 2003
Posts: 688
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From: LA
the primary reason a VAFC exists is to tune A/F ratio. changing vtec engagement is also a feature of the unit but it's not as though you can set it at 2000 rpm and "Be iN VtEc AlL ThE TiME y0!"
when you change vtec x-over you do it to flatten out the hp/tq curves. instead of having a dyno plot that looks like the grandcanyon, you can tune A/F and VTEC x-over so you have a smooth set of curves and smoother power delivery. tuning for this kind of result takes some effort so yes get a VAFC and YES get it dyno tuned.
when you change vtec x-over you do it to flatten out the hp/tq curves. instead of having a dyno plot that looks like the grandcanyon, you can tune A/F and VTEC x-over so you have a smooth set of curves and smoother power delivery. tuning for this kind of result takes some effort so yes get a VAFC and YES get it dyno tuned.
Registered User
Joined: Jan 2004
Posts: 12
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From: Australia
Originally posted by monkey
the primary reason a VAFC exists is to tune A/F ratio. changing vtec engagement is also a feature of the unit but it's not as though you can set it at 2000 rpm and "Be iN VtEc AlL ThE TiME y0!"
when you change vtec x-over you do it to flatten out the hp/tq curves. instead of having a dyno plot that looks like the grandcanyon, you can tune A/F and VTEC x-over so you have a smooth set of curves and smoother power delivery. tuning for this kind of result takes some effort so yes get a VAFC and YES get it dyno tuned.
the primary reason a VAFC exists is to tune A/F ratio. changing vtec engagement is also a feature of the unit but it's not as though you can set it at 2000 rpm and "Be iN VtEc AlL ThE TiME y0!"
when you change vtec x-over you do it to flatten out the hp/tq curves. instead of having a dyno plot that looks like the grandcanyon, you can tune A/F and VTEC x-over so you have a smooth set of curves and smoother power delivery. tuning for this kind of result takes some effort so yes get a VAFC and YES get it dyno tuned.
Everybody keeps saying that you can't tune the VAFC to kick in too low.... but nobody really states why!
I am planning on buying a VAFC2 for my '95 lude, and I had it in mind to have the secondaries kick in around 3500 or 4000 rpm. I suppose it depends on the actual specs of the secondary cam lobes, but I can't imagine it actually harming the output. Can someone explain please!!