Okay since I cannot yet afford the hondata setup (soon Newman) I decided to go with a chipped p28 to run around for now just so I can get the feeling of Vtec back in my bones. Well everything is going well so far and the car pulls real nicely however I know my secondaries are probably shut now and I couldnt remember how the rest of you guys hooked it up to work off vacumn..

Was it simply just attaching a line to the box that came from the Intake Manny??

 

Common. I just cant remember if it was that simple or not. And I think the engine definately needs some more room to breathe up top..

 

If the secondaries arent getting power/ground, then they arent working (open) and on the short runners.....which are the ones you want

 

So you mean to tell me that they are always open and only close if they get signal/power?? I thought it was the opposite way around..?? And that is what I want to confim since the p28 doesnt control the secondaries at all.

 

They are always open, unless they have a ground signal to them (they should have a key-on power running them) and your ecu grounds them up till 4900 then it opens, VTEC hits, and the competition is history

Mark

 

Are you completely sure?? I think you have it reverse. I thin they are always closed by vacum then around 3.9k RPMs with a signal they open up.. But either way my vtec is not as noticeable as before. But maybe its just because I havent driven the car with vtec in so long I have become deprived. I will drive around some more before the meet this Sunday and see how she behaves. I really need some highway time..

 

Can't you ziptie them open?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98CTRCoupe &raquo;</TD></TR><TR><TD CLASS="quote">Can't you ziptie them open?

</TD></TR></TABLE>
yes

I gained 1/2 second from that alone. zip tie oWnZ Joo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo E &raquo;</TD></TR><TR><TD CLASS="quote">
yes

I gained 1/2 second from that alone. zip tie oWnZ Joo </TD></TR></TABLE>

are you serious??

 

Unfortunately he probably is.. hehe. And where did you place this Zip tie?? Pictures would help.

 

yes, im serious. the NON activation was CHOKING my motor.

anyways on the driver side of the intake mani, ther is a vaccuum actuator that controlls the secondaries.

when the motor is off, the secondaries are closed by a spring.

twist open the secondaries and zip tie them open using the top of the actuator as an anchor (where the vaccuum line goes in.)

thats it. mind you I have boost, so my gains may be more than yours.

My mad driving skills didnt get that good between runs

ZIPTIES no form of competitive racing can be won without them and Duct tape.

 

Yeah I know they are closed because anything below 5k feels really torquey but as soon as vtec kicks in it feels like it wants to go crazy but it just winds out. I will try this zip tie thingy tomorrow and see if that makes any difference. But I know eihter poison or fastwannabe mentioned something like using a vacumn line from the intake manifold straight the black box in the back that forces them to open under vacumn and keeps them closed when not..

 

The design of the GSR intake manifold Intake Air Bypass (IAB) setup is such that the vacuum from the motor does not reach the actuator unless the solenoid is activated by the ECU. Vaccum is used to close the IAB, and thus they would remain open at all times if the ECU were not opening the solenoid that permits vacuum to reach the actuator.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jason kiDD &raquo;</TD></TR><TR><TD CLASS="quote">Okay since I cannot yet afford the hondata setup (soon Newman) I decided to go with a chipped p28 to run around for now just so I can get the feeling of Vtec back in my bones. Well everything is going well so far and the car pulls real nicely however I know my secondaries are probably shut now and I couldnt remember how the rest of you guys hooked it up to work off vacumn..

Was it simply just attaching a line to the box that came from the Intake Manny??</TD></TR></TABLE>

The DEFAULT condition for the IAB is OPEN. Yes i'm absolutely sure of that. I've posted about this subject many times in the past. To do what you want you will need to get some sort of RPM dependant signal. An Autometer shift light module works great for this. You will need to supply a constant +12v to the IAB solenoid and then trigger it at the set RPM by providing a connection to ground. Use an automotive 30 amp relay to switch the polarity of the RPM signal.

It's pretty straight forward and the topic has come up many times in the past. If you do a quick search on IAB, GSR secondaries, Etc and you will find all the info you need.

Mike

 

isnt it actually around 5800 on the obd-1 gizzers? Opening I mean?

 

hey jason

the way I have my secondaries hooked up is by just the vacuum hose from the IAB valve to the side nipple of the intake manifold.

They are closed at idle and also at mild throttle. They open in VTEC (due to increased vacuum), and also at WOT. I like it due to if i'm daily driving I can have a little more torque keeping them shut, and can open them at any time.

Here's a pic of how it's hooked up.



HTH ya man

 

Thanks alot man that is the information I was looking for. And a picture says a thousand words as well. I will also look into a shift light in the future as well.

 

And thanks for the info guys..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by poison &raquo;</TD></TR><TR><TD CLASS="quote">



HTH ya man

</TD></TR></TABLE>

nice nipple cap

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">They are closed at idle and also at mild throttle. They open in VTEC (due to increased vacuum), and also at WOT. I like it due to if i'm daily driving I can have a little more torque keeping them shut, and can open them at any time.</TD></TR></TABLE>

Vacuum is Higher at idle.......and goes to near zero at WOT.

Mark

 

using a p28 ecu the butterfly will be open at all time, if the valcume hole are not properly install to the right place, the butterfly may be close,

 

Well rewired everything and now the car feels sweet. I will take more pictures in a few days..

Pics from the h22 hybrid meet are here..

https://honda-tech.com/zerothread?id=522175

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fastwanabe &raquo;</TD></TR><TR><TD CLASS="quote">

nice nipple cap </TD></TR></TABLE>

LOL, hey it works!

Glad I could help Jason

 

hummm so if i just do what you did poison with the vaccum line attached from the intake manifold to the diaphram the butterflys will work correctly?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nos_b16 &raquo;</TD></TR><TR><TD CLASS="quote">hummm so if i just do what you did poison with the vaccum line attached from the intake manifold to the diaphram the butterflys will work correctly? </TD></TR></TABLE>

yes or no? i'd like to know too.. thanks!