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Old 09-29-2011, 08:14 PM
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VTEC Controller

I have no mods done to my car besides a short ram intake. I had a friend of mine suggest getting a vtec controller. I havent done much research on it, but is it a good idea for easy gains?

Are there any negatives to this idea?
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Old 09-29-2011, 08:33 PM
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Re: VTEC Controller

Basically it can be used to change your vtec engagement point to a lower RPM which in return can give you a much smoother curve on your powerband.

There's a guy selling a used one on here if you were interested.

No negative effects really, you can get a minimal gain overall but it's still an improvement in the end
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Old 09-29-2011, 09:35 PM
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Re: VTEC Controller

If you want something that's worth it, do the VTEC AIRFLOW CONVERTER or VAFC from APEXI, you get air fuel ratio readouts, as well as rpm and speed, its also a lot more versitale as you go on with your mods.

Drawbacks, has to be tuned, and splicing into the existing ecu is VERY risky and confusing, but you can get a wiring harness for about 130-150$ that will save you time and a few frustration dash punches. Haha
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Old 09-30-2011, 05:33 AM
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Re: VTEC Controller

Imo it all depends on if u plan to get a stand alone EMS later on. If u buy hondata (or Neptune) then there's really no need for one bc u can do all that thru ur ecu. In ur case I would say waste of money. U could spend the same $150+ n get something that will actually grant u some real gains (muffler, exhaust clutch flywheel jtc short shifter etc). In ur case all ud get to do is adjust when vtec hit. U wouldn't gain anything performance wise from it. also if u do buy one make sure u get the apexi. The cheaper ones do not adjust all the parameters needed to do the switch correctly where as the apexi's will.
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Old 09-30-2011, 09:01 AM
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Re: VTEC Controller

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Originally Posted by Diamond_lude View Post
Imo it all depends on if u plan to get a stand alone EMS later on. If u buy hondata (or Neptune) then there's really no need for one bc u can do all that thru ur ecu. In ur case I would say waste of money. U could spend the same $150+ n get something that will actually grant u some real gains (muffler, exhaust clutch flywheel jtc short shifter etc). In ur case all ud get to do is adjust when vtec hit. U wouldn't gain anything performance wise from it. also if u do buy one make sure u get the apexi. The cheaper ones do not adjust all the parameters needed to do the switch correctly where as the apexi's will.
I agree with diamond as well, focus on basic mods like he listed before jumping to piggyback or stand alone ecu's. And if and when the time comes do APEXI!
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Old 09-30-2011, 09:39 AM
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Re: VTEC Controller

Save your money and do research.
It's taken me over 6 years to finally have the plan I wanted and pursue it (As well as have the finances to do so)... You guys will see the transformation on here in a little over a month. :)
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Old 09-30-2011, 09:52 AM
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Re: VTEC Controller

Tiiight! Give us a sneak peak on this thread?
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Old 09-30-2011, 05:28 PM
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Re: VTEC Controller

Quote:
Originally Posted by amacrugby View Post
I have no mods done to my car besides a short ram intake. I had a friend of mine suggest getting a vtec controller. I havent done much research on it, but is it a good idea for easy gains?

Are there any negatives to this idea?
First of all the VTEC transition point is not a single rpm but ranges from 5k to 5.6 k rpm. Unless you have made some significant mods that go beyond basic bolt ons , there is nothing of any value to be gained from changing your around 5k rpm, full throttle VTEC change over point. Furthermore the normal change over point is around 5k rpm, but during part throttle operation when cornering for example, your Preludes ecu very cleverly delays the change over to as high as 5.6 k rpm to insure that the change over does not disturb the handling of the car and put you in a ditch.Changing your VTEC change over point may effect the seamless ecu operation of your VTEC hardware when cornering so if your into on street cornering you should consider this point.

From a Honda press release :

HIGH-SPEED OPERATION
At 5000-5600 rpm (depending on throttle position), an electronic control unit commands a spool valve to open and send oil pressure to pins in the rocker arms. Under pressure, the pins lock the two intake-valve rockers and the two exhaust-valve rockers to a third rocker arm. Until this moment, this third rocker arm (there is one on the intake side and one on the exhaust side) has been independently following the contour of a separate high-lift, long-duration cam lobe. Now the valves are actuated by the third rocker-arm follower and more closely match the induction and exhaust timing required for optimum torque at high engine speeds.

Last edited by SHDRIVER; 09-30-2011 at 06:04 PM. Reason: add Honda press release
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Old 09-30-2011, 05:43 PM
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Re: VTEC Controller

Quote:
Originally Posted by SHDRIVER View Post
First of all the VTEC transition point is not a single rpm but ranges from 5k to 5.6 k rpm. Unless you have made some significant mods that go beyond basic bolt ons , there is nothing to be gained from changing your around 5k rpm, full throttle VTEC change over point. Furthermore the normal change over point is around 5k rpm, but during part throttle operation when cornering for example, your Preludes ecu very cleverly delays the change over to as high as 5.6 k rpm to insure that the change over does not disturb the handling of the car and put you in a ditch.Changing your VTEC change over point may effect the seamless ecu operation of your VTEC hardware when cornering so if your into on street cornering you should consider this point.

From a Honda press release :

HIGH-SPEED OPERATION
At 5000-5600 rpm (depending on throttle position), an electronic control unit commands a spool valve to open and send oil pressure to pins in the rocker arms. Under pressure, the pins lock the two intake-valve rockers and the two exhaust-valve rockers to a third rocker arm. Until this moment, this third rocker arm (there is one on the intake side and one on the exhaust side) has been independently following the contour of a separate high-lift, long-duration cam lobe. Now the valves are actuated by the third rocker-arm follower and more closely match the induction and exhaust timing required for optimum torque at high engine speeds.
Too Long didnt Read LOL
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Old 09-30-2011, 05:55 PM
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Re: VTEC Controller

lol

who takes turns in vtec?
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Old 09-30-2011, 06:33 PM
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Re: VTEC Controller

Quote:
Originally Posted by SoFlaKidd View Post
lol

who takes turns in vtec?
...you first. Lolz
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Old 09-30-2011, 06:47 PM
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Re: VTEC Controller

Quote:
Originally Posted by SoFlaKidd View Post
lol

who takes turns in vtec?

Quote:
Originally Posted by Daddy_Danglez View Post
...you first. Lolz
The little Asimo Honda tech hiding in your car determines whether or not the VTEC transition occurs during cornering unless you hard wire an override switch on the dash board. I don't want any thing that "effectively" has its foot on my gas pedal getting bad data fed to it!



Last edited by SHDRIVER; 09-30-2011 at 06:53 PM.
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Old 09-30-2011, 06:54 PM
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Re: VTEC Controller

Looks like a storm trooper lolz.
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Old 10-01-2011, 01:53 AM
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Re: VTEC Controller

Quote:
Originally Posted by SoFlaKidd View Post
lol

who takes turns in vtec?
People who know how to drive their car.
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Old 10-01-2011, 05:21 AM
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Re: VTEC Controller

I corner in VTEC all the time during spirited driving. Its a vital part of my power curve. Y not use it? lol
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High rpm+boom+oil light divided by knock x stupid street racing=new engine
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Old 10-01-2011, 12:07 PM
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Re: VTEC Controller

I have an apexi neo for sale!
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Old 10-01-2011, 12:38 PM
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Re: VTEC Controller

dont do it!! just get it some work done to the engine and get it tuned. i had the apexi II on my accord and its more of just a fancy little thing with lights and graphs to make your car look cool, yes you can ajdust things vtec/air/fuel but you should really know what you are doing before messing with that stuff you can **** things up bad!! i sold mine and got my car tuned, i would say in my opinion that is the proper way of going about things
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Old 10-02-2011, 01:03 AM
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Re: VTEC Controller

Don't listen to them.^ the reason they didn't like it was cause they didn't know how to use it. If u know how to use it it's one of the best mods!
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Old 10-02-2011, 02:44 PM
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Re: VTEC Controller

If you want it - get it.


It only changes your vtec engagement - everything else is not tuning the car it's just tricking the sensors with false readings.


if you don't want it just to lower the vtec engagement than spend the money else where.


all of this OT is getting out of hand - is everyone on here to learn something and help others or to just **** around all day wasting bandwidth?
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