tuning vafc2 for turbo?
01-05-2005, 05:14 PM
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tuning vafc2 for turbo?
alright I already searched and couldnt find ****. I just need to know what menus to go to to fix my af ratio. I planned on going to the dyno this weekend so I just wanted to know what menus to use, I know it has to be the air correction feature or sumthing like that, but all the abreveations(sp) get me confused. sorry about the newb question.
01-05-2005, 05:18 PM
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Re: tuning vafc2 for turbo? (boostinhatch)
01-06-2005, 03:03 PM
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Re: tuning vafc2 for turbo? (MooreBoost)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MooreBoost »</TD></TR><TR><TD CLASS="quote">https://honda-tech.com/zerothread?id=841443
Read that before you spend your money on tuning.</TD></TR></TABLE>
all that confuses me, laiming terms?
Read that before you spend your money on tuning.</TD></TR></TABLE>
all that confuses me, laiming terms?
01-06-2005, 03:17 PM
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Re: tuning vafc2 for turbo? (boostinhatch)
Your timing will be advanced when you "trick" the ECU into using a lower load/pressure cell to get the right fuel. You end up with really advanced timing at low boost on a Honda ECU, but things get "ok" as you build a bit more boost.
01-06-2005, 03:33 PM
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Re: tuning vafc2 for turbo? (beepy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by beepy »</TD></TR><TR><TD CLASS="quote">Of course, this is basically correctable using static/boost ignition retarding devices.</TD></TR></TABLE>
not quite so simple.
not quite so simple.
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01-06-2005, 03:47 PM
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Re: tuning vafc2 for turbo? (DefiantGSR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DefiantGSR »</TD></TR><TR><TD CLASS="quote">
not quite so simple.</TD></TR></TABLE>
Not so simple at all.
The amount it advances your timing is far greater than the amount you could retard at the distributor. Also, when retarding at the distributor you are losing power everywhere. If you plan on using a BTM then you will have spent enough on the BTM and AFC to buy Hondata.
not quite so simple.</TD></TR></TABLE>
Not so simple at all.
The amount it advances your timing is far greater than the amount you could retard at the distributor. Also, when retarding at the distributor you are losing power everywhere. If you plan on using a BTM then you will have spent enough on the BTM and AFC to buy Hondata.
01-06-2005, 10:30 PM
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Re: tuning vafc2 for turbo? (beepy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by beepy »</TD></TR><TR><TD CLASS="quote">Of course, this is basically correctable using static/boost ignition retarding devices.</TD></TR></TABLE>
Static retard makes off boost driving sluggish and you can't take out enough to make the timing "optimal" at low boost.
The thing is, on a speed density EFI you run into the problem of using timing based on partial throttle settings at low boost - so it is REALLY advanced from where you want it at the onset of boost. As you push more boost, the conservative timing in the factory ECU will be enough to let you get by at your max boost. It's mostly the areas inbetween max boost and vacuum that you have to worry about - and that's precisely where you can't "tune" it out with things like the MSD BTM. Since it won't even retard anything at 0 psi(and you're running like 40* timing), and you don't need much retard at all when you actually build boost and the ECU starts using more conservative cells.
Static retard makes off boost driving sluggish and you can't take out enough to make the timing "optimal" at low boost.
The thing is, on a speed density EFI you run into the problem of using timing based on partial throttle settings at low boost - so it is REALLY advanced from where you want it at the onset of boost. As you push more boost, the conservative timing in the factory ECU will be enough to let you get by at your max boost. It's mostly the areas inbetween max boost and vacuum that you have to worry about - and that's precisely where you can't "tune" it out with things like the MSD BTM. Since it won't even retard anything at 0 psi(and you're running like 40* timing), and you don't need much retard at all when you actually build boost and the ECU starts using more conservative cells.
01-07-2005, 10:44 AM
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Re: tuning vafc2 for turbo? (Synapse Motorsports)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Synapse Motorsports »</TD></TR><TR><TD CLASS="quote">Don't get the hack unless boosting 5 psi or less, you should try hondata or uberdata instead. 
</TD></TR></TABLE>
actually the hack is better @ the upper limites of the map sensor (ie. 10~11psi)
</TD></TR></TABLE>actually the hack is better @ the upper limites of the map sensor (ie. 10~11psi)
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