vtec minimum throttle

Wolli · Post by **Wolli** » Thu Apr 22, 2010 7:42 am

hi.
you write in the contents:

Do not set the VTEC switch point too high as the high speed rocker arm will float on the lost motion spring and damage the valve train. As a guide do not set the VTEC point higher than 6500 rpm.

so isn´t it better to set the minimum throttle to 0%? otherwise when i get off my pedal @ 9000 rpms, i have this problem too!
the same is, when driving a bend with less throttle @ higher rpms.

Post by **Spunkster** » Thu Apr 22, 2010 9:21 am

Setting vtec activation to a miinimum throttle pwercentage of 0 is a bad idea as you could go into vtec under part throttle when you shouldn't be doing so.

Post by **Hondata** » Fri Apr 23, 2010 8:04 am

Both the VTEC window and a time delay prevents it from switching to the low cam at high rpm.

Wolli · Post by **Wolli** » Fri Apr 23, 2010 2:37 pm

what is the correct answer now? spunkster says, its a bad idea to set to 0, why? and the second answer??? when i drive with part throttle at high rpm while cornering, it cannot switch to the vtec cam. its a bit confusing. when it is set for example to 50%, it goes to 9000 rpms without vtec! and how should it stay on vtec when i lift my leg?

Wolli · Post by **Wolli** » Wed Apr 28, 2010 11:01 am

no more comments?

Wolli · Post by **Wolli** » Thu Aug 05, 2010 8:05 am

hmmm, seems that just dragracers use the s300. spunkster, can you please tell me, why it is so bad? or someone else?
we have a race track here, where you drive with 240 km/h up to a bend. you should not drive this with fully opened throttle. but driving with 8000 rpms on the low cam makes problems with the map! what solutions does other tuners have for this?

Post by **Hondata** » Thu Aug 05, 2010 8:59 am

Both answers are correct. Set the VTEC window so that the upper boundary switches to the high cam about 7500 rpm or so. Use a minimum throttle above 0%.