New guy

[skazuz]

love those corners.. if only in sg got that kind of corners.. it would be great..

 

cheers

skazuz

[senate747]

Originally posted by vtecpower4jp@February 27, 2007 12:32 am

Valve control?

 

Let's do the easy one first. The vtec canceller which I use.

All NC39 vtec engines have 4 valves per cylinder. right?

They breath using 2 valves in the lower revs (for economy and noise

restrictions) and 4 valves in the upper revs(for power). This is normal

vtec operation. Ok? For my spec2 it switches automatically at 6350rpm.

When you use the canceller you can chose when it changes to 4valve.

If you leave it on auto it will do normal 2/4valve change.

If you switch down it will stay on constant 2 valve.

 

Now, let's say you have switched it down(2valve only) for economy and your cruisin down the highway at 135kmh/9000rpm. It's quiet and smooth. Then your buddy goes flying past on his bandit. You want to catch him right?So you twist the throttle but nothing happens. Because on 2 valve it runs out of power at around 9500rpm. So what do you do? You flick the switch up on the vtec canceller and it jumps back to nomal operation. All 4 valves open and woosh your off with a 40% jump in power and soon you've caught your buddy.

 

It's a great piece of kit for highway fc but doesn't give you any extra power.

http://img247.auctions.yahoo.co.jp/users/5/4/4/3/brain_mce-img400x300-1171367872vteccu001.jpg

http://img247.auctions.yahoo.co.jp/users/5/4/4/3/brain_mce-img400x300-1171367868vteccu003.jpg

The more difficult and dangerous one is the vtec controller. It allows you to keep it in constant 4 valve. However there seems to be a valve clearance problem below 2500prm that can bend valves. Nasty stuff. If you slow down and forget to switch back to normal vtec 'tktktgggrdd oh sh_t!' So they only recommend this one for racing.

 

Hope this helps

First thing, welcome to Singapore!!! U're definitely found the right place to talk about bikes here..

 

Interesting piece of gadget u have there. How much does that cost in Japan? Think it will sell well cos of the large community of S4 we have in singapore. by the way, what's that small screen u have there on your spec 2? I'm quite interested in it. Mine's a spec 1..

[skateboy]

Originally posted by vtecpower4jp@February 27, 2007 12:32 am

Valve control?

 

Let's do the easy one first. The vtec canceller which I use.

All NC39 vtec engines have 4 valves per cylinder. right?

They breath using 2 valves in the lower revs (for economy and noise

restrictions) and 4 valves in the upper revs(for power). This is normal

vtec operation. Ok? For my spec2 it switches automatically at 6350rpm.

When you use the canceller you can chose when it changes to 4valve.

If you leave it on auto it will do normal 2/4valve change.

If you switch down it will stay on constant 2 valve.

 

Now, let's say you have switched it down(2valve only) for economy and your cruisin down the highway at 135kmh/9000rpm. It's quiet and smooth. Then your buddy goes flying past on his bandit. You want to catch him right?So you twist the throttle but nothing happens. Because on 2 valve it runs out of power at around 9500rpm. So what do you do? You flick the switch up on the vtec canceller and it jumps back to nomal operation. All 4 valves open and woosh your off with a 40% jump in power and soon you've caught your buddy.

 

It's a great piece of kit for highway fc but doesn't give you any extra power.

 

 

 

The more difficult and dangerous one is the vtec controller. It allows you to keep it in constant 4 valve. However there seems to be a valve clearance problem below 2500prm that can bend valves. Nasty stuff. If you slow down and forget to switch back to normal vtec 'tktktgggrdd oh sh_t!' So they only recommend this one for racing.

 

Hope this helps

so for the vtec canceller, simple to say, it takes off the vtec function n work in just 2 valves? then on back, its back to normal operation? but with this function, will ur bike feels sluggish around rpm of mayb 7000 - 8000?

 

so for this vtec canceller, is it just fixing a switch to cut off the power supply to activate the vtec?

[vtecpower4jp]

so for this vtec canceller, is it just fixing a switch to cut off the power supply to activate the vtec?

 

You got it skateboy. And yes it does feel sluggish as the power peak on 2valve feels like around 6500rpm, after that the power curve is falling off. It runs out of push all together by 10k

Infact the manufacturer only recommends to go to 9k.

[vtecpower4jp]

senate 747, thanks for the welcome.

It's a daytona screen. The best addition I've made for highspeed and/or touring. It starts to work best after 80kph and with a tuck topspeed is actually slippery. Previously anything over 130 made my arms feel like they were being stretched.

[bobo_rider]

like ur full system very much... and the video is nice...

[senate747]

Originally posted by vtecpower4jp@February 28, 2007 12:06 am

senate 747, thanks for the welcome.

It's a daytona screen. The best addition I've made for highspeed and/or touring. It starts to work best after 80kph and with a tuck topspeed is actually slippery. Previously anything over 130 made my arms feel like they were being stretched.

guess i cant get that locally... i may opt for a small screen from Givi instead...

[skateboy]

Originally posted by vtecpower4jp@February 27, 2007 11:59 pm

You got it skateboy. And yes it does feel sluggish as the power peak on 2valve feels like around 6500rpm, after that the power curve is falling off. It runs out of push all together by 10k

Infact the manufacturer only recommends to go to 9k.

then when the power curve is falling, the more u throttle, the more fuel it will burn off but with no power output. if lets say riding at about 110km/h at rpm 7000+ its ok... anything higher shd feels sluggish.

 

[hilfiger]

Originally posted by vtecpower4jp@February 26, 2007 01:38 am

Let me see what I can do with the Ofuna hills. I've never ridden there to tell the truth. Is it good riding? How do you know about it?

 

http://farm1.static.flickr.com/150/400703433_7625616bc5.jpg

What mirrors are u using? Expensive? They look great! Better than stock ones.

[warrior.c.o.n.p]

Welcome to SBF vtecpower4jp... great s4 u got thr.. wow:thumb:

[vtecpower4jp]

Yep it gets sluggish up top and it doesn't matter how much you twist the throttle it won't help. Best to cruise in the 110-120kph range.

The mirrors are B&C I think. I'll get a better pic of em and post it later in the week. They are wide and slick in the wind. Also polarized blue mirror so I don't get blinded by a trailing sun.

TSR's full titanium carbon system dropped 7kg off the stock system and added 6hp. Also sounds mean. Not good for fc though.

http://farm1.static.flickr.com/178/408808656_80b49dca43_o.jpg

The crossover pipes in the primary headers are meant to aid low down rpm and torque. They work.

[dintigger]

welcome to the forum mate!!!

nice full system you got there.. if only it is legal here..sigh...

[dintigger]

hi do you happen to know the moriwaki header cost for a cb400sf in JP?

been drooling bout it so some time now

thanks

[vtecpower4jp]

For Moriwaki go here

http://www.moriwaki.co.jp/global/product/e...B400SF%20H-VTEC

 

enjoy