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Vtec controller/ignition system

 
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Old 02-22-2008, 02:05 AM
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Vtec controller/ignition system

Just got a 2001 and want to slowly build up the engine (looking to pull ~350 when its all said and done). I am in the midst of buying a vtec controller and ignition system, but wanted to know a few things.

1) I am not that wise to the engine, yet, and was wondering if there is a "stock" setting on the controller that I could adjust it to. That way the controller wont be doing anything until my mods are ready.

2) Is there any harm on upgrading the ignition system before putting any other mods on it? My basic understanding is that it provides a more efficient combustion for the engine...is that accurate?

3) What is the best (for the money) controller/ignition system out there? I have heard the apexi vafc is a goodie...thoughts.

Thanks!!!
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Old 02-22-2008, 12:42 PM
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well imo, a vtec cotroller should not be used unless you have f/i...its useless without f/i and a waste of money because you may acutally lose whp and tq and gain nothing, at best you might gain a little acceleration,"maybe"...your best bet would be to just wait until you get f/i, and then choose a vtec controller to best accommodate what ever your setup of f/i is...as for the ingnition system, yeah i believe that its used to provide better combustion of the electrical system like (msd's sci "sport compact ignition")...
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Old 02-22-2008, 01:25 PM
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ok what is f/i?? also i have the apexi VAFC and I love it...
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Old 02-22-2008, 03:03 PM
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Joja- f/i is forced induction i.e. turbo, supercharger etc...

you dont really need a vtec controller, ya they look cool..but not doing you anygood, chillz is right, you will probably loose power and its not really the best way to control fuel.

as far as an ignition system, you dont need one until you start cranking out some major hp, more like 300 to the wheels or so...

If wouldnt mess with it until you get the basics done..intake, header, exhaust...then depending on the build you go from there..

what are your goals for your build f/i or all motor???...that will probably help with answers

But to answer your question on here, apexi for a vtec controller is the way to go and no a ignition system wont hurt anything except your wallet
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Old 02-22-2008, 11:01 PM
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Originally Posted by CHILLZ_VTEC View Post
well imo, a vtec cotroller should not be used unless you have f/i...its useless without f/i and a waste of money because you may acutally lose whp and tq and gain nothing, at best you might gain a little acceleration,"maybe"...your best bet would be to just wait until you get f/i, and then choose a vtec controller to best accommodate what ever your setup of f/i is...


The above section couldn't be more wrong.

A VTEC controller is useless on a stock engine, and yes you will probably find yourself going backwards. However I've seen otherwise stock cars find another 3-5kW (4-7HP at the wheels) with a good tune on the VAFC.

However where the ability of a good tuner with the VAFC comes in is after you've added an intake, header and exhaust. Maybe a set of cams as well. Because for tuning basic bolt ons you don't need anything extravagant, and the piggyback system will work quite well. I've seen 25-30% gains with basic bolt ons tuned with a VAFC.

And if you do plan on going forced induction sometime, then I personally would be using something with a lot more tunability than a VAFC.

It all comes down to the tuning of the setup. AFAIK there isn't a stock setting you can use, better to just put it on "thru" until you get it tuned so you can still run purly off the factory ECU.
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Old 02-22-2008, 11:08 PM
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thank you brash, i was just about to call BS right now also
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Old 02-22-2008, 11:43 PM
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yeah, i never mentioned the vafc...it clearly states "vtec controller"....maybe it should have been specified more accurately to the vafc or vafc2...but lets say you buy the jr vtec controller, and put it on your car, you will never see the 4-7 at the wheels, cuz all it does is manipulate the vtec, it does not provide more whp or tq...it just allows you to have vtec turnover to as low as 3000rpm, which is wortless on a stock engine....thats what i was saying...now the vafc, yeah ive seen gains on ludes to about 4whp that are properly tuned, but thats not really, or at least should not be considered just a vtec controller, its a piggyback fuel computer that allows you to tune your fuel management and allows you to also manipulate the vtec turnover point which on a stock engine should still not be programmed to go below 4000rpm cuz your gains will be very little to none...
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Old 02-22-2008, 11:45 PM
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i agree with you, bottom line theres no point if your going to run a stock motor.
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Old 02-23-2008, 04:06 AM
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Ok Chillz, you're excused, and I apologise.

You're dead on, the likes of the BC product are just that, a VTEC controller.

The problem there is that when it moves the VTEC crossover point, it doesn't bring the high cam fuel or ignition maps with it.

And anyway, Honda put the crossover point there because that's the best place for it. If you look at the torque curves of both low and high cam, where they cross in the VTEC crossover point. Which just happens to be at around 5200RPM.
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Old 02-23-2008, 04:48 PM
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thats cool brash...no apology needed...we are all on here to help eachother out right??? with our own experiences, and knowledge of parts or certain mods that others have yet to witness...so its cool man
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