i am running a h22 with a p28 and i just put a mugen chip in it and i was wondering how you would suggest opening them up. take them out, put it on a rpm activated switch, or hook it up to a toggle switch? help

 

ive got a kinda neat and easy fix for this ....

all i did was take a vac line from the diaphragm
and hook it staright to vacume sorce on the plenum...

what it does is holds them closed like normal untill a good jab at the throtle opens them up and holds them open ...

it really helped the top end power(since i suspected they wernt opening all the way)

and thery still work good at low throttle......sucks going up big hills cause they open but you really cant tell a huge power diff

 

If you are referring to the butterflys what I did was remove them out of the manifold and with some jb weld sealed a large hole that is on the top half of the intake manifold so there will be no vacume leaks. Or how i had it before all this I just had a vacume line runing from the butterfly to the intake manifold.

 

one vote here for yea baby

 

i took mine out, ported it nice, jb weld any shaft wholes

 

Ok, I HAVE THE SAME PROB, i have a H22 with a Hondata P28. Right now i have the vac line going to the IAB unattached and plugged up. I was told this will keep IAB held open, IS THIS TRUE???

and how much horsepower can that little thing really rob if not working??

 

please read my post above

 

an h22 on a p28 with a mugen chip?

does it run like ***?


i was suprised to see how bad the h22 runs on an untuned p72

 

it runs a little rich but it runs alot better than the skunk2 chip i had because the skunk2 stuttered when i hit vtec? but the mugen program is nice and smooth little bit more power but uses a little bit more gas

 

how much power am i losing from the butterflies not opening?

and is the vacum line already there or do i just add another one?

 

I know when I ran a p72 and the skunk chip.... It ran like crap!

 

the butterflies default to open. you aren't losing any hp on the top end, but having them open is hurting your low end a bit.

 

were exactly are these hoses at i am trying to do it right know like is it just hose or what

 

they do not default to open.....the system work like this..(p13/p72)....with no vacume they are help open by a spring...when the car is started vacume is applyied to a "box" and the IAB...this holds them closed untill the rpm gets to 4600 rpm...there a solinoid (sp) is tripper cause in the vaccume to be realesed again opening the iabs as due to lack of vaccume and spring tension .

on a p28 there is still vaccume since it isnt a ecu related thing the iabs are held closed and the solniod(sp) has no way of being opened to let the vaccume to escape and the iabs to open .....


and to hook them straight to vacume take the vac line off the iab diaphram and plug it up .....then find a spot on the intake mani and run a line straight from the intake mani to the iab diaphram and thats it...with the car of they should be open and with the car running they should snap closed....give the throttlr cable a quick jab and they should open a bit ...under full throttle they will open all the way (as long as the spring is in good working order)

 

Kinda ghetto,but it works,im my pile of accumulated honda parts,i found a solenoid valve that will open to another opening,therefore releasing vaccum,and hooked it up to my vtec solenoid circuit.Now they open at 4800 with vtec



That white check valve is needed also to make sure they stay closed during full open throttle untill you hit vtec.



Modified by aeolus at 10:08 AM 12/6/2003

 

**UPDATE**

i took the vac line from the diaphragm and ran it to the plenum. my butterflies open, but are always open. wen i start it up, the butterfiles are alreadyopen. whats the problem?? isnt it suppose to open wen i mash on it?


Modified by jdmh22lude at 6:29 PM 12/6/2003

 

bump

 

anyone??

 

I have no idea what he is asking.


A chipped 28 is a piece of ****.

If you want to run secondaries you need an RPM switch and a relay because it needs to work in reverse. Current all the time and dropped when you hit a certain rpm. You don't open up the ecu.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by satan_srv &raquo;</TD></TR><TR><TD CLASS="quote">I have no idea what he is asking.</TD></TR></TABLE>

he's tryin to say that he ran a vac line from the diaphragm to the plenum. evryone else says that it should open wen u jab the throttle. but his kicks open wen he starts the car. thats wat the problem is.

 

mabye his diapram is craped out ..wont hold vaccume

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22poweredgsr &raquo;</TD></TR><TR><TD CLASS="quote">

he's tryin to say that he ran a vac line from the diaphragm to the plenum. evryone else says that it should open wen u jab the throttle. but his kicks open wen he starts the car. thats wat the problem is.</TD></TR></TABLE>

Again I don't know why you would do that. It would create a lot of turbulence between shifts even if it did work

 

my god, the reason most p28 chipped or basically GSR ecus run like crap is that they dont open the secondaries until 6000 RPM, GSRs also have the dual runners, and the H22 secondaries were designed to open along with vtec at 5200, im running a Mugen chipped P28, i run my secondaries open all the time, and have no lag, whatsoever, my Vtec engages at 4500-4600 and just flat out goes...id run your secondaries open, if your racing low end isnt gonna help you anyways...

 

how do u run your secondaries open.

 

Couple of things.

If you run the IAB's open all the time, as it has been said before, you will lose a little low end torque. Nothing can be done about this, however, some people have used "mugen style" programs that can help smooth out the curves.

I personally don't like this method, but it does work.

If you remove the vacuum line from the IAB's, they should spring OPEN all the time. I know for a fact GSR's do this.

Now it has been said to use a switch, wire up a RPM gate, or just wire it up with VTEC for your P28.

And since we all know the P28 doesn't look for the EGR valve, it's the better choice for more power right? Why not just add the IAB control to the P28 ecu? It can be done, I've done a few dozen of these for my customers and they love it. There are limitations however.......

The P28 with the IAB mod cannot run a standard P28/30 chip. It uses the GSR program. BUT, the GSR program MUST be modified for the increased displacement otherwise you will run extremely lean. Also, there are hardware modifications that need to be done to the P28 to work the GSR program. If you are unfamilar with the P28 or don't want to take a chance soldering your ecu, let someone who has done it before do it.