Vtec Controller Problem

[UgOoDmEbAd]

wow.. this is my 1st post ever =]]

i own a 95 hb civic (EX or Si or Vti whatever you guys call it, the D16Z6 (D16Y1 here in australia) SOHC Vtec one... i dont know the models for each region) ...some call it EG5
its completely stock engine-wise

u guys seem 2 really know your civic stuff..
so anyway... im lookin into buyin 1 of these RS-type vtec controllers.. has anyone else got 1? know anything about em?

the info is here...
http://rstype.com/proddisp.asp?id=67&ProdcatTempp=1


seems good to me.. but i was wonderin... if i make it engage vtec earlier.. will my cars comp sense this and adjust to run more fuel? or will it just engage the vtec cam and run lean?

without the fuel management i rekon its basically useless... anyone can tell me if it does and why? ..or why not?

is it worth engaging vtec earlier on my stocky civ?
i know it kicks in at 5300rpm because thats when there is power in the vtec solenoid. when would u reccommend it be engaged?

thanks =]]

 

[hoamic11]

that looks like a POS, by the way it seems, it looks like just a switch, kinda like the jet control module that recalibrates the air/fuel map ratio, but for a vtec point change.

imo i thikn it's a waste of money, if you change teh vtec point in your civ dependent how low you go the engine light will come on, but at 5300 it'll be fine, since the factory setting is about 5500-5700 ish, i think

 

[UgOoDmEbAd]

but isnt that wat all vtec controllers are?
engage the vtec cam at set-rpms and roll the comp into thinkin its vtec to pump more juice?

mines 5300 engagement stock.. or at least power to the solenoid at that point anyway.

engine light? which means? cant i just disconnect the light? its not gonna blow my engine engagin it a bit early.. u think its damaging or sumthing?

 

[hoamic11]

your car kicks in at 5300?

not necessary like the apexi vtec controller u can set the fuel mapping, vtec point, and other stuff.

what that switch looks like to me is that it's automatic and it has no user input.

it's just the engine light, if you lower it too much than yeah it could wind up damaging your engine, but if it's not much than i don't think so

 

[UgOoDmEbAd]

ok then.. ur right about it having no user input.. i see none either, (except dat lil knob thing) but i expected that... its not advanced as them apex`i ones.. but not as expensive either =]]

and by it being 'automatic' is that a yes 2 the ECU adding more fuel wen needed (ie earlier engagement point)? ..or will it run lean if i make it engage vtec early?

 

[Andy]

Strange, my z6 vtec kicks in at 4700-4800, i know cause i have a vtec indicator light i wired up to my ecu.... *shrugs*

 

[Handlebars]

your ecu will not compensate for the increased airflow of earlier vtec operation. nor will your car perform well, it will stumble if you set it lower. you have a stock motor. the honda engineers did a ton of dyno time perfecting the stock vtec crossover point. without serious mods to it, changing it is only going to hurt power.

 

[UgOoDmEbAd]

Strange, my z6 vtec kicks in at 4700-4800
- really? can u feel it? becuz to be honest, i really cant feel mine kick no matter how long i let it rev out.. has anyone else had this problem? or is it just that my model of SOHC Vtec isnt all that good?

your ecu will not compensate for the increased airflow of earlier vtec operation. nor will your car perform well,
- why? how u determine this?

the honda engineers did a ton of dyno time perfecting the stock vtec crossover point
- this is probably true.. but wouldnt it just result in a compromise; like more fuel useage or sumthin? i dunno, its why im asking =]]

 

[Sound Streamin']

Well my bro's engages at like 4200 or around there, he can correct me if Im wrong. You don't feel the change over, but you can definitly hear it. It's loudest in 4th gear. He'll throw it in 4th, and floor it at about 3000. Just wait for it to hit around 4200 or whatever, and listen. You'll hear the exhaust sound change.

If your going to get a vtec controller, get a vafc.

 

[UgOoDmEbAd]

hrmm.. ok
is your bros 4200 stock? or controlled?

but a vafc... thats the apexi 1's yer?
is there any real point to get one with a stock engine such as my own?

i was thinkin the RS-type one because it was cheaper and i havent really got any mods yet... im not sure if my ECU will compensate for the increased airflow; thats my real question.

 

[Martin Racing Design]

Originally posted by UgOoDmEbAd
hrmm.. ok
is your bros 4200 stock? or controlled?

but a vafc... thats the apexi 1's yer?
is there any real point to get one with a stock engine such as my own?

i was thinkin the RS-type one because it was cheaper and i havent really got any mods yet... im not sure if my ECU will compensate for the increased airflow; thats my real question.

spend your money elsewhere for gains. VAFC is a good TUNING utility, not a ricer mod such as a vtec controller. A VTec controller isn't going to help much on a stock engine anyhow... like above mentioned.

 

[UgOoDmEbAd]

yer i guess it wont help much... but for 60$ common i reckon that'd be alrite.. even if it is stock