ok check it, now people are getting rid of vtec in drag cars and just using a big cam and it saves weight from the engine to...

now i have a vtec controller, how bad for the engine would it be if i left vtec on all the time, like set it for 1000 rpms...would this be more harmful than good...

 

wont work to good vtec engaged at idel will make ur car lop like a big block chevy and wont do much good when u turbo a vtec motor when vtec engages u actually loose power so they make a cam that is good for the turbo and grind off the vtec lobes like signals crx no vtec there and its fast as crap

 

ok thanks, but i mean driving it, will it be bothersome, can vtec stop beinging powerful at a certain rpm, i have a 7500 rpm redline so do you think i would lose power at 5500 if i start vtec early, or that wouldnt make a difference...

 

you cant have vtec start at 1000rpms. vtec kicks in if the oil pressure is high enough. thus your motor doesnt produce enough oil pressure at 1000 rpms to turn vtec on. second, if you could get vtec to kick on at 1000 rpms, your powerband would not diminish any earlier than if your vtec kicked in at 5500 rpms.

 

Vtec eats too much gas now. why would you want it on all the time?

 

i wouldnt have it on all the time, like if i were to race at a stoplight or the track, i could set it to whatever 1500 and go from there...see what im saying...

 

*sigh*

 

BIG CAM turned on Early = No Torque and Power in the lower RPM Range say 5000 and below.. Which also = [I]Slow car for street racing

 

you're just trying to get ahead of the game a little too much, a lot of the things done on drag cars are really not feasable in a car you drive to work everyday

Some advice for you:
1.leave your vtec enagement point where it is: end of story
2.do some more reading on this site(search) and others there is a LOT of discussion about vtec crossover points and the effects on power. Figure out how your engine works before you start spending money on things. Research a lot!

 

a reason why they run just big lobe cams is that they lauch at 8000 rpms anyway so they have no need for the small cam.

 

Having a VTEC engagement point that low would be harmful to your engine as well.

 

cant beleive ur going to leave stop lites at 5k rpm

 

forget it

 

heh, ok take it from someone who has actually tried this. i was trying to isolate a problem with my vtec engagement so i tapped into my solenoid and wired it to a swtich powered by my 12 vlot cigarette lighter (VERY jack rigged design). so basically vtec would engage every time i press the button. what i found is that engaging vtec at any rpm below 4K (b16) proved to be useless.

 

"a reason why they run just big lobe cams is that they lauch at 8000 rpms anyway so they have no need for the small cam"

Exactally!! if you would be in vtec all the time, why have a smaller lobe.

Also running with a big lobe all the time wears on your engine alot more than running on a small economic lobe. Vtec cams are aggresive cams also..that means that they advance the timing of yout intake cycle just a tad. If you ran that setup all the time you would cause a great deal of stress on an engine...the racing guys have the time and money to break down their engines, and rebuild them every couple of races...If you want to run vtec-killer cams (which toda makes and sells for $1800, but you need the toda springs and retainers for a hollow shaft also, so add another $500) Make sure you have a built engine, and arent afraid to dive in and fix things every once and a while. But..hey!..you will make more power