AVC-R Boost by gear
#1
Honda-Tech Member
Thread Starter
AVC-R Boost by gear
After posting my latest track experience;
https://honda-tech.com/zerothread?id=1033497
I have received many PMs about how to setup the AVC-R gear based boost. I know when I started reading the manual, it definately was not cut and dry. I did some searches here on H-T and found that either people hated it, or couldn't figure it out so here goes.
One of the first things you need to do is determine your speeds for each gear. A good source for most tranny applications is here:
http://autocrossing.com/cgi-bin/gearcalc.cgi
For this calculation, you will need to know your max RPM, tire OD and of course the tranny you are using. Plug these into the Speed calculator and record down the speeds for each gear.
For example, on my car, ITR tranny, 23"OD tires, and 9800 max rpm gave me:
1st: 47.2mph, 2nd: 72.4mph, 3rd: 104.5mph, 4th: 137.7mph and 5th: 179.7mph.
Then you need to take the max engine rpm and divide that by the speed for each gear. In my case I would have 207.62(Rounded to 208), 135.35(Rounded to 135), 93.77(Rounded to 94), 71.16(Rounded to 71) and 54.53(Rounded to 55). This is 1st through 5th gear calculations.
You take these values and input this into the AVC-R. Go to the Main Menu. Scroll down until you highlight the "ETC." icon.
Press Next. Then you go to the "Gear Judge" icon.
Press Next. Then you input your 1st through 5th gear calculations from above. These are the max RPM/gear speed that you calculated previously.
Then you go back to the main screen and highlight the desired Setting that you want. Either {A} or {B}.
Press Next. Scroll down to Start Duty and press next.
From there, determine how much boost you want to add or subtact per gear. The % amount that you put in here will add or take away from your Boost/Duty Setting {A} or Setting {B}. In my example, I want to see 15% less boost in first gear.
Go back to the setting screen and highlight the "Learn Gear" icon.
Press Next. Then select the gears which you want learn base to apply to.
"O" represents that the gear is in learn mode.
This is pretty much it to setting up the gear base boost on the AVC-R. I will say though that it will a few passes to get it dialed in 100%. You may spin some and will want to reduce boost amounts. Or you can adjust the speeds of which you are in at each gear to have the boost come in near the end of a gear, etc.
Hope this helps.
https://honda-tech.com/zerothread?id=1033497
I have received many PMs about how to setup the AVC-R gear based boost. I know when I started reading the manual, it definately was not cut and dry. I did some searches here on H-T and found that either people hated it, or couldn't figure it out so here goes.
One of the first things you need to do is determine your speeds for each gear. A good source for most tranny applications is here:
http://autocrossing.com/cgi-bin/gearcalc.cgi
For this calculation, you will need to know your max RPM, tire OD and of course the tranny you are using. Plug these into the Speed calculator and record down the speeds for each gear.
For example, on my car, ITR tranny, 23"OD tires, and 9800 max rpm gave me:
1st: 47.2mph, 2nd: 72.4mph, 3rd: 104.5mph, 4th: 137.7mph and 5th: 179.7mph.
Then you need to take the max engine rpm and divide that by the speed for each gear. In my case I would have 207.62(Rounded to 208), 135.35(Rounded to 135), 93.77(Rounded to 94), 71.16(Rounded to 71) and 54.53(Rounded to 55). This is 1st through 5th gear calculations.
You take these values and input this into the AVC-R. Go to the Main Menu. Scroll down until you highlight the "ETC." icon.
Press Next. Then you go to the "Gear Judge" icon.
Press Next. Then you input your 1st through 5th gear calculations from above. These are the max RPM/gear speed that you calculated previously.
Then you go back to the main screen and highlight the desired Setting that you want. Either {A} or {B}.
Press Next. Scroll down to Start Duty and press next.
From there, determine how much boost you want to add or subtact per gear. The % amount that you put in here will add or take away from your Boost/Duty Setting {A} or Setting {B}. In my example, I want to see 15% less boost in first gear.
Go back to the setting screen and highlight the "Learn Gear" icon.
Press Next. Then select the gears which you want learn base to apply to.
"O" represents that the gear is in learn mode.
This is pretty much it to setting up the gear base boost on the AVC-R. I will say though that it will a few passes to get it dialed in 100%. You may spin some and will want to reduce boost amounts. Or you can adjust the speeds of which you are in at each gear to have the boost come in near the end of a gear, etc.
Hope this helps.
#6
Re: AVC-R Boost by gear (b00stedbyFastrax)
Just out of curiosity here...
When i set mine up, i went into the screens as you have shown above, but the number NS/255 like the screen below.
If you notice, you can drive in each gear and the N/S number will change for each gear. I set my car up this way.
Please correct me if i'm wrong.
Also, we could use a post for the avcr users as the archive doesn't have much info.
Modified by RacerXI at 4:07 PM 10/27/2004
When i set mine up, i went into the screens as you have shown above, but the number NS/255 like the screen below.
If you notice, you can drive in each gear and the N/S number will change for each gear. I set my car up this way.
Please correct me if i'm wrong.
Also, we could use a post for the avcr users as the archive doesn't have much info.
Modified by RacerXI at 4:07 PM 10/27/2004
#7
Honda-Tech Member
Thread Starter
Re: AVC-R Boost by gear (Mikes01GSR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mikes01GSR »</TD></TR><TR><TD CLASS="quote">awesome post, gonna have to try that out. After it "learned did you notice a
good bit of difference?</TD></TR></TABLE>
I know that the gear based boost works great. I only made it 4 passes on street tires and it was getting closer everytime. The key issues are when you spin your numbers go out the window. Even with some bald BFGs I managed a 11.5 even though the 60' was a 2.116.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RacerXI »</TD></TR><TR><TD CLASS="quote">Just out of curiosity here...
When i set mine up, i went into the screens as you have shown above, but the number NS/255 like the screen below.
If you notice, you can drive in each gear and the N/S number will change for each gear. I set my car up this way.
Please correct me if i'm wrong.
Also, we could use a post for the avcr users as the archive doesn't have much info.
</TD></TR></TABLE>
That is also another way you can do it as well when you use the learn function. It will help you dial it in closer.
good bit of difference?</TD></TR></TABLE>
I know that the gear based boost works great. I only made it 4 passes on street tires and it was getting closer everytime. The key issues are when you spin your numbers go out the window. Even with some bald BFGs I managed a 11.5 even though the 60' was a 2.116.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RacerXI »</TD></TR><TR><TD CLASS="quote">Just out of curiosity here...
When i set mine up, i went into the screens as you have shown above, but the number NS/255 like the screen below.
If you notice, you can drive in each gear and the N/S number will change for each gear. I set my car up this way.
Please correct me if i'm wrong.
Also, we could use a post for the avcr users as the archive doesn't have much info.
</TD></TR></TABLE>
That is also another way you can do it as well when you use the learn function. It will help you dial it in closer.
Trending Topics
#12
Honda-Tech Member
Join Date: Jan 2003
Location: Penticton, BC, Canada
Posts: 2,593
Likes: 0
Received 0 Likes
on
0 Posts
What does the Setting [A], [B] mean? Is that low and high boost? Also. for the Learn-Gear mode, What does itexactly do, and do you have to do it for every gear?
#18
Honda-Tech Member
Thread Starter
Re: (Kwuaymaikrup)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tchleung »</TD></TR><TR><TD CLASS="quote">What does the Setting {A}, {B]}mean? Is that low and high boost? Also. for the Learn-Gear mode, What does itexactly do, and do you have to do it for every gear?</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kwuaymaikrup »</TD></TR><TR><TD CLASS="quote">Setting {A} and setting {B} is like toggling between two boost maps. This is a great write up. </TD></TR></TABLE>
What he said up there. The AVC-R has two different preset boost levels that you input to it. For example on my car, the Setting {A} is for low boost pump gas. The Setting {B} is for race gas.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RacerXI »</TD></TR><TR><TD CLASS="quote">Also, when you set up the gear judge, the avcr will start to learn your duty % unless it is already set up. </TD></TR></TABLE>
Exactly, if you do not input the duty % differences, the learn gearn will judge this for you based on your rpm - Vss inputs.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kwuaymaikrup »</TD></TR><TR><TD CLASS="quote">Setting {A} and setting {B} is like toggling between two boost maps. This is a great write up. </TD></TR></TABLE>
What he said up there. The AVC-R has two different preset boost levels that you input to it. For example on my car, the Setting {A} is for low boost pump gas. The Setting {B} is for race gas.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RacerXI »</TD></TR><TR><TD CLASS="quote">Also, when you set up the gear judge, the avcr will start to learn your duty % unless it is already set up. </TD></TR></TABLE>
Exactly, if you do not input the duty % differences, the learn gearn will judge this for you based on your rpm - Vss inputs.
#19
Honda-Tech Member
Join Date: Apr 2002
Location: Louisville, KY, US
Posts: 2,126
Likes: 0
Received 0 Likes
on
0 Posts
Re: (Blown90hatcH)
excellent post, it tooke me absolutely forever to figure this out, but as of my last event, i was a good deal faster. took otu boost in 1st, added in 2nd, 3rd, 4th. Helped me to a 11.75 1/4 on pump gas at a base of .9 bar, which allowed it to spike to 1.00 bar. times were on slicks, off course
but its amazing how well it works, my hondata datalogs don't show the response taht well, but in terms of grip, it was amazing.
good writeup and nice times on street tires.
but its amazing how well it works, my hondata datalogs don't show the response taht well, but in terms of grip, it was amazing.
good writeup and nice times on street tires.
#21
Honda-Tech Member
Join Date: Apr 2002
Location: Louisville, KY, US
Posts: 2,126
Likes: 0
Received 0 Likes
on
0 Posts
Re: (Mikes01GSR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mikes01GSR »</TD></TR><TR><TD CLASS="quote">now the minimum boost you can run is what your spring is correct?</TD></TR></TABLE>
yep. the max is double your spring rate, or so i've read, i have yet to attempt that. but i shoudl be soon, i ordered a 12psi spring and got a 9psi spring
yep. the max is double your spring rate, or so i've read, i have yet to attempt that. but i shoudl be soon, i ordered a 12psi spring and got a 9psi spring
#23
Honda-Tech Member
Join Date: Sep 2001
Location: Pensacola, FL
Posts: 1,369
Likes: 0
Received 0 Likes
on
0 Posts
Re: (seen4ever)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by seen4ever »</TD></TR><TR><TD CLASS="quote">
yep. the max is double your spring rate, or so i've read, i have yet to attempt that. but i shoudl be soon, i ordered a 12psi spring and got a 9psi spring </TD></TR></TABLE>
You can run more boost then double ur spring. I'm running an 10 psi spring and boost up to 28psi!
yep. the max is double your spring rate, or so i've read, i have yet to attempt that. but i shoudl be soon, i ordered a 12psi spring and got a 9psi spring </TD></TR></TABLE>
You can run more boost then double ur spring. I'm running an 10 psi spring and boost up to 28psi!
#24
Honda-Tech Member
Join Date: Sep 2002
Location: Florida
Posts: 3,445
Likes: 0
Received 0 Likes
on
0 Posts
Re: (Blown90hatcH)
Thanks for the info, I was right on some of the settings but i have not mess w/ the start duty yet. I'll try to dial that in at the track this weekend. Thanks again.
#25
Re: (boostedb20vtec)
FYI: I've seen a small yellow (0.25bar, 3.63psi) make 17psi on a dyno with a boost controller and a tial ext. wastegate.
Also: When your NE point is set to start at 3K and goes up by 500 rpm increments to 7000, does the system keep reading up until say 8500 rpm?
Also: When your NE point is set to start at 3K and goes up by 500 rpm increments to 7000, does the system keep reading up until say 8500 rpm?