hey whats up guys i was watching the Best Motoring video called Roaring VTEC, Battle at 10,000 RPM the other day and in the one segment, a man with a Type-R integra had switched both cams to vtec cams so that theoretically vtec was always on. i was wondering if anyone had ever done this or read about it. i am planning on getting a B16a this summer and i am trying to find every little thing i can do to get power out of it. thanks a lot!

 

so you wanna get better cams,sounds good

 

yeah... i have probably the hardest decision to make this summer... this is gonna be my first real big thing for my car. i either wanna get rota slipstreams, coilover suspension, and gauges, or get the b16 and try to build it a little bit. im only 17 and at most i'm gonna have 2k, but i saw the video and the idea of puttin two big vtec cams in and it really switched on a light...lol

 

suspension mods are always good,i would do some research and figure out what you wanna do,dont rush it..find out all you can...good luck dood

 

thanks a lot man! im gonna take my time with whatever i do and do it right the first time...

 

im confused

 

ya dood anytime..theres some people on this site who really know what works,whats good and all that stuff..i learn more stuff everyday just by snooping around this site and asking questions or just trying to help out..good luck

 

Benbuilt4u... i wanna know if anyone has heard of or read about swapping out the smaller cam in a b series for another vtec cam so that vtec is theoretically always on.... the car that it was done on had other work done, but it seems like it would give a b more power

 

well you can get a cam that has the primary lobes (off vtec) that are the same duration as the stock vtec lobes, then get a even beastier vtec lobe. or you could keep teh stock cams and run a swtich so you could swtich vtec on whenever you want and keep it on

 

You are seriously confused about VTEC operation. There isnt a small cam and a big cam, and both cams do have VTEC. There is no sense in defeating VTEC, and if you wanted to, you should start with a B18 or B20.

Let me break it down for you. The B16 has two cams, one acts on the intake valves, and the other acts on the exhaust valves. Now VTEC means that each of those cams has two cams crammed into one, with a switch to select between them, effectively making it like a four cam engine. Which doesn't exist to my knowledge. VTEC is cam lobes for low RPM power and seperate lobes for high RPM power, crammed onto a single cam.

The lobes on the cam control how much the valves open, when they open, and how long they stay open. In low RPM, you open the valves less and let less air through the valves, since there is less demand for air flow, it will flow quicker. Kind of like pinching the end of the hose. So low lobes give you more power in the low RPMs. But in high RPM, there is more demand for air flow, you open the valves more and keep them open longer, and time the opening differently. So VTEC switches from the low lobes when you're in the low RPM, to the high lobes when you're in the high RPMs. That way you have a nice long power band.

Why would you want to defeat that on a street car? You'd LOSE power!

 

There is no sense in defeating VTEC -shaundrake- its called toda racing vtec killer camshafts go to inlinefour.com and go to toda and see what they have to say about it its quite crazy

 

The 'accuratcy readings' on this thread is OFF THE CHARTS!!!!!
You got one guy not knowing the coralation between cams and VTEC and one guy agreeing for no point in reason, then you got someone else talkin about killing VTEC.

 

no small or big cam? what would you call the cam profile that allows you to idle at 700 rpms? the vtec, or "big" cam wont let you idle below 1800 or so. vtec killer cams, which toda isnt the only maker...check out ferrea/crane, they make a roller rocker that runs a vtec only cam profile, or, as most engine builders would call it, a race cam.
vtec "cam" is nothing more than a race profile cam. they use oil pressure to switch between a smog legal cam profile that will pass emissions, idle at 700, and get good gas mileage. but when the engine is turning quicker honda developed a system that would allow more air to enter the combustion chamber without having to run a FI setup on the engine. voila! vtec was born.

vtec killer cams would be ridiculous on the street, and i should know, ive done it. building a b16a for all motor is a waste of your money and your machinists time. its not gonna live long. you want a b16a with good power-keep the compression around 9.5:1-10.4:1 and run 10-14lbs of boost with turbo cams or 1st gen b16a cams. this will give you very little lag and make power to about 8000rpm's, which is a good rpm for getting 100k miles out of your b16, the best engine honda has made so far. focus on making the gasoline engine more efficecient per litre. learn about plateau or mirror honing, micro-polishing, thermal transfer, balancing, overall engine oiling, and valve overlap.