i seen a msd rpm switch
i already did a search on this only found 1 result but it didnt work for the guy. i was wondering if any 1 knew how to hook it up or has done it before.
cause if i figure out how 2 do it. im buying 1 they go for like 60 bucks
only thing cant set oil and fuel and stuff like apex controller but still for vtec reason its good.

 

Don't bother. VTEC works the way it does for a reason.

 

set vtec at the stock point...unless you change the cam you dont need to change the crossover point

 

ive used it a couple times and it works fine if you dont want to use the proper ecu for your app. the deal is the rpm switch has a negative output (ground) and vtec solenoids use positive (12v) so you need to use a relay to trigger the solenoid. if you need details let me know.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton &raquo;</TD></TR><TR><TD CLASS="quote">Don't bother. VTEC works the way it does for a reason.</TD></TR></TABLE>

Sometimes it can work more to your advantage at a different rpm

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BauleyCivic &raquo;</TD></TR><TR><TD CLASS="quote">set vtec at the stock point...unless you change the cam you dont need to change the crossover point</TD></TR></TABLE>

This is usually true, BUT not always Sometimes you'll find that a different vtec engagement will benefit you, it all depends on the mods of course.

It also is never any set point, you need to use a dyno to find these optimal points. Asking on a webboard, what is the best xover point will get you no where fast.

 

It kicks in when it does for good reason. Modulate it without dyno input and you risk A.) losing power and B.) damaging your engine.

 

i was just wondering how it was actually done and if it was worth doing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by splitime &raquo;</TD></TR><TR><TD CLASS="quote">
It also is never any set point, you need to use a dyno to find these optimal points. Asking on a webboard, what is the best xover point will get you no where fast.</TD></TR></TABLE>

That's what warranted my response, but you do bring up good points. And


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicrida3 &raquo;</TD></TR><TR><TD CLASS="quote">i was just wondering how it was actually done and if it was worth doing.</TD></TR></TABLE>

Question #1: Don't know
Question #2: no

 

so my vtec kicking in at 2800 isnt a good thing?

 

i put a msd switch on my homeboys car it was a 91 civic that we did a mini me on. and it works fine and its been on there for over 2 yrs

 

these threads make me sad. You guys dont seem to understand exactly what goes on in the ecu to make it decide the proper time to engage the vtec solenoid. First off, a series of parameters must be met, such as throttle %, a ceartain map reading, and load from the ELD, not to mention a minimum speed. The most important thing that the ecu does is cheange the fuel map along with the ignition map for vtec. That means that when the car goes into vtec, the ecu starts reading from another series of maps, to compncate for the new valve duration. When you just put a switch in there, and make it hard for the ecu to expect the engagement and the ecu cant allways compencate for it. There is allot more going on in the ecu than just "vtec on" "vtec off" .

Rob

 

rjardy!!!
thanks for wasting your time because i know how it works and i seen this **** in a store (msd ) i wanted to know if it was possible to use for vtec. like a cheapier way out of a vtec controller without being able to set oil and stuff.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicrida3 &raquo;</TD></TR><TR><TD CLASS="quote">rjardy!!!
thanks for wasting your time because i know how it works and i seen this **** in a store (msd ) i wanted to know if it was possible to use for vtec. like a cheapier way out of a vtec controller without being able to set oil and stuff.</TD></TR></TABLE>

yeah thats quite the intelligent response. I have no doubt in my mind that you are completely able and knowledgable about Honda's and the ins and outs of vtec. you must be ASE certified right?...................


where the hell is my freeking HAMMER icon

Rob

 

 

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

Thank you sir!!!

Rob

 

: + hammer + : =

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicrida3 &raquo;</TD></TR><TR><TD CLASS="quote"> like a cheapier way out of a vtec controller without being able to set oil and stuff.</TD></TR></TABLE>

Set oil? what?

Anyways unless you have extensive work/modifications to warrant changing the vtec point, don't mess with it. Mine has been changed to 6k rpm, but i also had my car on a dyno tuning it when i made this change (to get rid of the dip in power when it switches over)....BTW moving up (lower rpm) will almost gurantee a loss of power, like it was stated before, more happens then just changing from the smaller cam lobes to the larger cam lobes.
So to answer your question...no it's not worth spending $60 to be able to change your vtec crossover point, If you wanted to actually benifit from it (providing your set-up would benifit from a change) you would need to spend a little more money because you'd need to strap the car on a dyno to actually look at the power curve, your *** dyno wouln't tell you anything.