Please please please i need everyones help!!!
10-13-2004, 07:27 PM
#43
Beware of leakage
Join Date: Dec 2002
Location: Shreveport, Louisiana, just east of nowhere
Age: 42
Posts: 19,790
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by allmotor_2000
With VTEC you have a high lift/duration cam lobe which is used after a certain RPM. Oil pressure (controlled by the VTEC solenoid) pushes a pin which locks the center lobe (high profile 'vtec' lobe) to the rocker assembly. When not in 'vtec', the regular (or adjacent) cam lobes are used. On SOHC VTEC cars, the extra lobe is only available on the intake side while on the DOHC VTEC cars, it is available on the intake and exhaust side. On the new i-VTEC motors, you get cam timing adjustment in addition to variable valve lift - its like having an adjustable cam sprocket which adjusts as RPMs change!! I believe this is only active on the intake-side, but I may be mistaken. I am sure the new NSX is DOHC i-VTEC - meaning variable valve lift and cam timing on the intake and exhaust!!
If you open up an integra DOCH VTEC motor, you will see three rocker-arms/cylinder on each side. The center one is used only during VTEC - The cams also have three lobes/cylinder with the center one being the 'hi-cam' or 'vtec' profile.
If you open up an integra DOCH VTEC motor, you will see three rocker-arms/cylinder on each side. The center one is used only during VTEC - The cams also have three lobes/cylinder with the center one being the 'hi-cam' or 'vtec' profile.
I see what your saying, but still don't fully understand, it's ok, excellent explanation
. If only there was a moving illustration to show the VTEC cam coming into play.
10-14-2004, 01:30 PM
#44
Cruisin'
Join Date: Aug 2003
Location: Philly PA
Age: 39
Posts: 19
Likes: 0
Received 0 Likes
on
0 Posts
Good luck with that man. I was always under the impression that adding mods to your car did void the warranty and thats why i haven't done anything yet, gets me thinking about a new intake and exhaust. *grin*
Thread
Thread Starter
Forum
Replies
Last Post
ITSJESTER
4G TL Audio, Bluetooth, Electronics & Navigation
17
12-06-2018 02:29 AM
emailnatec
5G TLX Tires, Wheels & Suspension
29
09-28-2018 04:27 PM
08_UA7_Gr33k
Member Cars for Sale
13
02-11-2016 02:17 PM
