AVC-R Boost by gear

[Blown90hatcH]

After posting my latest track experience; http://www.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.

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[Mikes01GSR]

awesome post, gonna have to try that out. After it "learned did you notice a
good bit of difference?

[Rory Breaker]

Great post

[Rod.]

Nice info, cant wait to get my avc-r

[b00stedbyFastrax]

nice write up. gonna save this info for later on.

[RacerXI]

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

[Blown90hatcH]

Originally Posted by Mikes01GSR

awesome post, gonna have to try that out. After it "learned did you notice a
good bit of difference?

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.

Originally Posted by RacerXI

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.

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.

[BodyKits NW]

Finally, some useful information for some people. I use the AEM EMS, but I know people needed this.

[Phil Koury]

Good information, this should help out a lot of AVCR users.

Oh and good luck with your car, that vid was nice!

[alpha]

Great post Jason I'm thinking about selling my controller and moving to the AVCR.

[mpintegra96]

great post i have the AVC-R and i love it

[Tchleung]

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?

[TurboTegB18c]

Jason, thanks for this write up. I was looking into a gear dependent boost controller and this might be the one for me. Great write up.!

[Kwuaymaikrup]

Setting {A} and setting {B} is like toggling between two boost maps. This is a great write up.

[project dc2]

great post !!!! inspired me to get an AVC-R heheh

[Kwuaymaikrup]

Whoops....

[RacerXI]

Also, when you set up the gear judge, the avcr will start to learn your duty % unless it is already set up.

[Blown90hatcH]

Originally Posted by Tchleung

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?

Originally Posted by Kwuaymaikrup

Setting {A} and setting {B} is like toggling between two boost maps. This is a great write up.

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.

Originally Posted by RacerXI

Also, when you set up the gear judge, the avcr will start to learn your duty % unless it is already set up.

Exactly, if you do not input the duty % differences, the learn gearn will judge this for you based on your rpm - Vss inputs.

[seen4ever]

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.

[Mikes01GSR]

now the minimum boost you can run is what your spring is correct?

[seen4ever]

Originally Posted by Mikes01GSR

now the minimum boost you can run is what your spring is correct?

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

[SuperTeg95]

This is awesome! Im glad someone finally took the time to explain it.

[TurboTegB18c]

Originally Posted by seen4ever

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

You can run more boost then double ur spring. I'm running an 10 psi spring and boost up to 28psi!

[V-SPEC 1]

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.

[RacerXI]

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?