sohc vtec?

[marqua]

i have a 99 civic 1.6 sohc vtec. when should i feel the vtec kick in and how much of a kick should it give?

[HonduhDave]

I don't know about anyone else, but I can't say I feel much of a "kick" when vtec switches lobes. Could partially be the fact that I have a slushbox, but the SOHC vtec is more economy and less performance oriented so you're probably not going to see a whole lot of change. But it will engage in the upper rpms, around 4800 rpm - but also depends on other factors. Hope this helps...

[EnJoiThaRex]

from what i hear, there is no kick, which makes sense. The "kick" you feel is just vtec engaging, almost like shifting, rpms drop then rise. if you knew how to tune you wouldnt want vtec "kicking" hard at all...

[MiamiCoyote]

x2 enjoitharex....as far as i can tell, there's no 'kick'... the vtec "kicks" in tho around 2700rpm. you (well, i at least) don't hear any sound when it engages but he's exactly right, it's just like when you're shifting

[marqua]

so wut if i dont feel any kick at all. i just got the car and iv never driven a vtec before so i dont realy know what to look for to make sure its working propperly.

[MiamiCoyote]

my bad.... it engages around 5krpm (oops!...just about double the number i originally posted)... and it's just not noticeable, that's why you won't feel a 'kick' since it's just controlling the valves electronically when certain requirements are met. i dunno a lot about it but thats the bit of info i do know.... there's probably a lot more people better suited to properly answer your question with greater detail tho!

[redpanda87]

sometimes when you stand infront of a vtec engine and someone revvs high enough it will kick you out of anger.

jk. depends what sohc you have and when the crossover pt is. sohc you really cannot feel the difference. B series ftw.

[hndacvcsi]

ok so you have a 99ex its a d16y8, and your vtec switch-over poinbt is 5500 rpms, redline is 6800. now as far as a "kick goes the others are right, in that you dont wanna feel it jump, you just wanna hear it. if your header is leaking as you said in the other post you should damn well be able to hear it. it really just sounds like you hit the gas harder, thats all. its really not much of a diff with sohc, and dont let anyone lie to you either because dohc dont have much more of an advantage with vtec. its all the same thing with the exception of one less cam.

[redpanda87]

Originally Posted by hndacvcsi

ok so you have a 99ex its a d16y8, and your vtec switch-over poinbt is 5500 rpms, redline is 6800. now as far as a "kick goes the others are right, in that you dont wanna feel it jump, you just wanna hear it. if your header is leaking as you said in the other post you should damn well be able to hear it. it really just sounds like you hit the gas harder, thats all. its really not much of a diff with sohc, and dont let anyone lie to you either because dohc dont have much more of an advantage with vtec. its all the same thing with the exception of one less cam.

Correct me if im wrong but dont the single cams only have vtec lobes n the intake sides? Where as, the dohc have it on both. The b series are beasts where as the k's are more subtle in comparison for crossover and overall smoother which is good.

[CONRAD29]

man truth to be told obviously ur drivin a dx for a reason yes vtec engages around 5500 rpm redline is 7250 unless u have chipped ecu stock ex its not really noticeable with i/h/e u can definably tell its there for example my jdmd15b block with a y8 head y8 hg it starts to pull reall nicly after 5500 and i can hear the change actully engine souds diffrent all sohc vtec dose is lock up the intake up and the dohc engine both of them lock up intake and exhaust
i dont know bout u other ex rivers but my engine deffinetly pulls aloot harder when vtec is engaged

[hndacvcsi]

Originally Posted by CONRAD29

man truth to be told obviously ur drivin a dx for a reason yes vtec engages around 5500 rpm redline is 7250 unless u have chipped ecu stock ex its not really noticeable with i/h/e u can definably tell its there for example my jdmd15b block with a y8 head y8 hg it starts to pull reall nicly after 5500 and i can hear the change actully engine souds diffrent all sohc vtec dose is lock up the intake up and the dohc engine both of them lock up intake and exhaust
i dont know bout u other ex rivers but my engine deffinetly pulls aloot harder when vtec is engaged

yeah your right, im driving a dx. nevermind that its built and will walk an ex any day off the week and its about 5-700lbs. lighter, lets just focus on the fact that its a dx. either way i was wrong on the redline, my fault homie. i was just making the point that vtec is not really the biggest deal as far as performance goes. sure it pulls harder after 5500. sure its designed to do that. but in all actuality its just a way to rev higher while maintaining decent gas mileage.

as far as b-series being better then d-series, well no duh. the point i was making there is that vtec is not the end all be all of horsies in a b-series engine. its once again just a means of revving high while keeping your gas mileage up, and keeping the motor from puking its guts on the hwy

and just so there is no further debate on my merits, ive owned a 00 ebp em1 with a b16a2, a 91 rex with a mini-me, and an 89 rex with a fully built ls-vtec. all of these had vtec so i know of what i speak, so not to sound like an ass

[WVU97GS-R]

oooh i need popcorn battle of the 17.5 second cars!!!!

but your right. vtec doesn't affect peak hp potential. vtec is there to broaden tq and improve gas mileage. why do you think v8's don't use vtec? because it doesn't affect peak hp and they already have broad powerbands. and vtec isn't for power on all models. civic ex's don't even have aggressive cam lobes to switch too. aint that vtec-e a bitch ;-)

[WVU97GS-R]

Originally Posted by CONRAD29

man truth to be told obviously ur drivin a dx for a reason yes vtec engages around 5500 rpm redline is 7250 unless u have chipped ecu stock ex its not really noticeable with i/h/e u can definably tell its there for example my jdmd15b block with a y8 head y8 hg it starts to pull reall nicly after 5500 and i can hear the change actully engine souds diffrent all sohc vtec dose is lock up the intake up and the dohc engine both of them lock up intake and exhaust
i dont know bout u other ex rivers but my engine deffinetly pulls aloot harder when vtec is engaged

well duh you just went from 12 valves to 16 valves, the engine doesn't sound different it's just reving higher. all engines sound differnent when you push on the gas harder. that's all that changes. it's not like you're running a bigger cam lobe. vtec isn't a sound to begin with you don't even feel it. but i doubt it pulls all that hard. it's a sohc virtually stock d-series motor.

and the only motors you can "feel" vtec in are the dohc performance ones that change between cam profiles. and that shutter that you feel isn't a good thing. a properly tuned motor will not have a noticeable vtec engagement. the shutter that you feel at vtec crossover is a "BAD" thing. if you look on a dyno you'll see that the shutter you feel is a momentary dip in hp and tq as you switch cam profiles. so only ricers will tune their car to make the vtec kick feel bigger

[MiamiCoyote]

told you they know more than me i'm still learning too! lol