Im looking at swapping my B18A1 out of my '93 DA and dropping in a B18C1. Only problem is VTEC. I love the way it feels and sounds, but it really plays hell on the motor. Ive done some research on VTEC switches, and it seems that everyone just wants to be able to control when it kicks in. That is NOT what i want. I want to be able to cruise without VTEC when just riding around, and when i feel like racing or getting into it a bit, i flip a switch and VTEC kicks in at the proper RPM, etc. just like it normally would. Would this just be a matter of installing a "killswitch" on the VTEC solenoid to stop it from engaging? Or is it more complicated?

 

wiring it up to a shift light with a switch is the easiest way if you dont wanna use a button to control it..


I am about to do this if i decide to do ls-v..havent decided whether i should boost or go ls-v yet though.....

 

Hm...like im trying to get it so i can switch from a non-vtec motor to a vtec motor, not modify when the ecu actually turns it on.

 

vtec doesn't engage until 5500. i'm not sure why you are cruising at that rpm. it also activates based on load. so if you can't keep the motor out of vtec, i suggest you relearn how to drive.

 

I just want to know if this is possible lol obviously there are ways to not hit vtec while cruising, but i think itd be kinda cool to have a switch to turn on "race mode" haha

 

and i think that for the B18C1 it kicks in at 4500 rpms, i could be wrong though

 

what? that makes absolutely no sense. do you even know what vtec is and how it works?

 

It makes sense i just cant explain it very well. and yes, i know what vtec is and how it works. switches to a higher cam lobe based on oil pressure, rpm, engine temp, etc.

 

oh..why?im not sure that would even be a good thing to do..

i guess you COULD put a switch on the vtec selenoid..but im not sure on how that would effect the car's performance,let alone it will most likely trigger some kind of code when it looks for the vtec..but it will work..

make sure to use a relay with the switch.


grn - 12v+
white - ecu signal wire
blk - 12v-



good luck!

 

I mean im just pondering this idea. My buddy has an '03 Integra GSR sitting in his driveway because of 3 spun crank-bearings, all because of vtec lol. I want to be able to have the option to use vtec when i want the extra power but be to use just motor when i want. I guess you could say its to preserve reliability? And JuicedUpRice, thats what i was worried about; if it would be messing with the ecu, im not sure what it would do. I have OBD1 if anyone knows if that would make a difference or not.

 

so many things wrong with that last post

1. no such thing as an 03 integra
2. vtec alone will not cause spun bearings
3. you still sound like you dont know what vtec is

when it's off, it's off. why you're trying to re-invent the wheel it seems, i dont know.

 

there is an '03 integra. DC5. i did however mess up the year lol his is a 2000 GSR and no, vtec alone wouldnt cause spun bearings but it certainly didnt help What makes you say i dont know what vtec is? i would mainly just do this for ***** and giggles, like i said earlier you could just stay out of vtec. its called a fun experiment/challenge

 

There is a reason there is a factory set crossover point from honda on these motors. Because at such rpm is where it is most efficient.

Start doing some more research and reading....there shouldnt be "fail" in every single post you make

 

Okay...im not trying to change WHEN vtec kicks on. im trying to control IF vtec kicks on. Fail on your part bro. JuicedUpRice is the only one who understood what i was going for.

 

Fail!!!

 

we understand what you're trying to do, it just makes no sense. vtec has nothing to do with a spun bearing. it's not always on, so what's the point of disabling it?

you must have no idea how an engine works.

 

Lol JuicedUpRice, i appreciate your answer, despite the impracticality of what i asked. Its not supposed to be practical, itd just be a fun project i think. And as far as me not knowing how an engine works, im not worried about my mechanical abilities lol. but my car, my problem right? this was a simple question guys, i was just trying to get an answer not a load of bs so chill.

 

Wow

 

So because we're telling you what you're proposing is stupid it's BS? You noobs and your trains of thought blow my mind.

 

ok ok lol either way, thanks for the feedback guys. At least now i know, however stupid it may be, it is possible.

 

Well I understand what you want and what you want to do with vtec but the question is why? It's not like you will be cruising in 1st 2nd 3rd gear. If you're just cruising, normally people would go into 4th or 5th since it allows a decent cruising speed applied at relatively low rpms where it isn't likely for vtec to engage. Like mentioned before by someone else (on my phone so scrolling up is a little bit of a hassle) if you can drive, feel and listen your engine then you would know whether you need to shift or not to avoid vtec. That's just my two cents.

 

 

You do not need this. You should not want this. With a GSR tranny, a B18C1 will "cruise" at 80mph in 5th gear at about 4200 rpm. VTEC engages at WOT at 4500 with the stock P72 ECU. If you go above 4500 rpm and VTEC does not engage, you'll have a hard time getting to 5500 rpm. VTEC helps facilitate higher revving. If you rev high, you need VTEC. If you don't, it won't turn on.

And don't forget about the IAB.

 

change your fifth gear to LS then you wont to deal with that high rpm cruising issue,

my setup

95 GSR Y80 stock 1-4 gear ratios and LS fifth (stays around 3500 rpm @ 65-70mph
ITR Helical LSD

 

This is a bad idea for so many reasons. For one, even if you could "turn off" VTEC the ECU is still going to add timing and fuel during that RPM point making the car run like crap and make no power negating the reason to deactivte it in the first place.There is absolutely no reason to do this at all. Your friend has spun bearings because he probably ran low on oil and drove like an idiot with no oil. VTEC has 0 impact on engine wear or bearings, it's 100% user error that causes damage.