do you need the oil pressure sensor and plug on the vtec solenoid to run vtec on an obd0 engine with a y8 head?

 

Depends. What ECU are you running?

 

pm6

 

That ECU doesnt control VTEC, so no, you dont need either the solenoid or pressure switch wired up.

 

hmm...ok because the vtec solenoid i have doesnt have a oil pressure sensor and i dont want to buy one..it has a bolt in it.

 

Well, VTEC isn't working anyways, so it's not terribly important.

If you do get a VTEC ECU, you should probably buy one though.

 

well i was thinking of running a vafc to control the vtec, would i then need a oil pressure sensor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rice a roni &raquo;</TD></TR><TR><TD CLASS="quote">well i was thinking of running a vafc to control the vtec, would i then need a oil pressure sensor?</TD></TR></TABLE>

No.

 

Dont you still need the vtec solenoid????????????????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rice a roni &raquo;</TD></TR><TR><TD CLASS="quote">well i was thinking of running a vafc to control the vtec, would i then need a oil pressure sensor?</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slurp56 &raquo;</TD></TR><TR><TD CLASS="quote">

No.</TD></TR></TABLE>


correct. you can set vtec at any RPM with a vafc.


temp, pressure, and oil level will not effect it. kinda weird having vtec hit at like 3k.

it doesnt feel or sound right at all. having vtec come in at like 6k, though...... that **** hits like a kick in the ***.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by daveb91 &raquo;</TD></TR><TR><TD CLASS="quote">Dont you still need the vtec solenoid????????????????</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by daveb91 &raquo;</TD></TR><TR><TD CLASS="quote">Dont you still need the vtec solenoid????????????????</TD></TR></TABLE>

Yeah... ?

Maybe I dont understand the context of your question.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slurp56 &raquo;</TD></TR><TR><TD CLASS="quote">That ECU doesnt control VTEC, so no, you dont need either the solenoid or pressure switch wired up.</TD></TR></TABLE>

You said he doesnt need the solenoid to activate VTEC I though you did no matter what you use to activate I though you still need the solenoid.

 

So your running a Vtec engine w/ a dud Vtec solenoid?? and want to know if you can run Vtec w/o a Vtrec ECU or Vtec oil pressure switch? This is the exact kinda **** that makes me HATE driving hondas, to realize that these kind of questions are even asked by other Honda guys? no wonder everybody hates on hondas so much Honda came up w/ a perfect working setup top engage Vtec so what do you do? try and figure out the most ghetto way to make Vtec work w/o using the CORRECT parts honda intended???? way to go idiot!


do us all a favor and run your car into a wall @ full speed in your homeade vtec setup....yo!

 

and yet they couldn't set the crossover to a point ideal for maximum performance...

Janos

 

I believe with some ECU program (turboedit) I've seen you can make the PM6 activate VTEC using the A/C portion of the ECU and then get it tuned for timing/fuel.


From D-series.org:


obd0 - how to get VTEC activation with your ecu!

1-wire vtec, 2 ways to do it:

1. Original way was to use an automatic obd0 ecu (90-91) like the ps9 from the civic EX or just convert a pm6 to automatic. Then vtec runs off the automatic lockup solenoid pin on the ecu. Turboedit has an option to select to enable this feature.

Advantage - get to keep A/C

Disadvantage - no more automatic, ps9's are hard to find, converting pm6s to automatic is a pain in the butt.

2. New way is to use ANY obd0 ecu (90-91 again!) and tap into the A/C clutch pin on the ecu. This means you lose A/C if you had it... IN ADDITION, you must wire in a relay. This is simple though...
(pic stolen from pgmfi.org)
This won't be inside the ecu... anywhere in your engine bay will do. Just to clarify.
1. ECU a/c clutch pin goes to signal
2. 12V from any source to the input
3. output goes to vtec solenoid
4. 12V from the same source goes to the other side of the signal

Advantage - VERY easy to make a pm6 do this. Just takes a click of the mouse in turboedit.

Disadvantage - no more A/C, must wire in a relay (that's really not hard though)

DON'T FORGET to modify your fuel and ignition maps to include the low and high cam portions of the original maps. For example, for a z6 engine, if you have vtec set at 5000rpm, enter the low cam fuel values from a p28 for all rpm values 5000 and below. Enter all the high cam fuel values from a p28 for all rpm values above 5000rpm. You'll have to get creative because you'll notice that the obd0 ecu doesn't have the same rpm resolution that a p28 has. If the rpm # on the obd0 ecu is in between a p28 rpm value, just take the average of those two fuel values.

It'll be some work, but you'll eventually find the perfect tune or just search around on pgmfi.org. Someone probably has uploaded something similar. But that's not the point of this sticky, is it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by daveb91 &raquo;</TD></TR><TR><TD CLASS="quote">

You said he doesnt need the solenoid to activate VTEC I though you did no matter what you use to activate I though you still need the solenoid.</TD></TR></TABLE>

He never said he was going to use a VAFC till later. I was making light of the fact that since a PM6 ECU does not control VTEC, the VTEC solenoid and VTEC Pressure switch were essentially useless items (other than stopping the oil leak he'd have if they weren't present).

Yes, if he wants to use a VAFC, an RPM switch, or a button to control VTEC, then he will need the solenoid, there is no other way to make it engage.

 

I though you were telling him you dont need the solenoid to activate VTEC. which is absolutely wrong. So I guess we are on the same page now?

 

whoa whoa whoa...i'll make it clear this time...

ok its like this. i have a sohc obd0 non vtec head and block. the block has been rebuilt and i swapped the head out for a y8 head. now the thing is the y8 head has a vtec solenoid. what it doesnt have is an oil pressure sensor switch...(learned that the hard way then fucken oil was leaking all over on start up) i now have the oil pressure switch plugged off with a bolt.

my question is...would i need the oil pressure switch to run vtec if i use a vafc to control vtec engagement?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rice a roni &raquo;</TD></TR><TR><TD CLASS="quote">whoa whoa whoa...i'll make it clear this time...

ok its like this. i have a sohc obd0 non vtec head and block. the block has been rebuilt and i swapped the head out for a y8 head. now the thing is the y8 head has a vtec solenoid. what it doesnt have is an oil pressure sensor switch...(learned that the hard way then fucken oil was leaking all over on start up) i now have the oil pressure switch plugged off with a bolt.

my question is...would i need the oil pressure switch to run vtec if i use a vafc to control vtec engagement?</TD></TR></TABLE>

I have no idea why the sensor is missing from your vtec solenoid but yes, you need it. maybe you can get lucky at a local pull-a-part or something. As far as I know there is no other way to get your Vtec Solenoid working again w/o that sensor (probably expensive to replace new though )

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rice a roni &raquo;</TD></TR><TR><TD CLASS="quote">
my question is...would i need the oil pressure switch to run vtec if i use a vafc to control vtec engagement?</TD></TR></TABLE>

i want to kick this kid in the head

 

hmm...go for it...damn it so i would need the pressure sensor for the vtec solenoid and the pig tail for it?

 

**BITCH SLAP**
how many times are u ganna ask the same question just to get that same answer?????

get the oi pressure sensor, get a vafc2 and wire it up
its that simple............................................

 

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

I have no idea why the sensor is missing from your vtec solenoid but yes, you need it. maybe you can get lucky at a local pull-a-part or something. As far as I know there is no other way to get your Vtec Solenoid working again w/o that sensor (probably expensive to replace new though )</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dumped4dr &raquo;</TD></TR><TR><TD CLASS="quote">**BITCH SLAP**
how many times are u ganna ask the same question just to get that same answer?????

get the oi pressure sensor, get a vafc2 and wire it up
its that simple............................................ </TD></TR></TABLE>

How about I bitchslap both of you? The oil pressure sensor is NOT, I repeat NOT required for VAFC or the 1 wire PM6 to activate VTEC. He can leave the bolt in there for all the VAFC cares. The only case where you would actually need it is if you are using an VTEC ECU to control VTEC itself because it would throw a code then.

OP, feel free to just get an VAFC or use the 1 wire method to activate ur VTEC and have fun! For most people, the VAFC is easier tho.

Janos

 

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

How about I bitchslap both of you? The oil pressure sensor is NOT, I repeat NOT required for VAFC or the 1 wire PM6 to activate VTEC. He can leave the bolt in there for all the VAFC cares. The only case where you would actually need it is if you are using an VTEC ECU to control VTEC itself because it would throw a code then.

OP, feel free to just get an VAFC or use the 1 wire method to activate ur VTEC and have fun! For most people, the VAFC is easier tho.

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

dumped you're being ignorant...thanks janos...