 |
 |
 |
|
|
 |
| Search | Car Forums | Gallery | Articles | Helper | AF 350Z | IgorSushko.com | Corporate |
 | | ||
| |
|
| Latest | 0 Rplys |
|
|||||||
| Engineering/Technical Ask technical questions about cars. Do you know how a car engine works? |
 |
 Show Printable Version |  Email this Page | 
Subscribe to this Thread
|
|
|
Thread Tools |
01-02-2002, 01:14 AM
|
#1 | |
|
AF Fanatic
 Join Date: Dec 2001
Location: Austin, Texas
Posts: 1,762
Thanks: 0
Thanked 0 Times in 0 Posts
|
does VAFC affect motor stability?
when using a VTEC AFC controller, i've read that if you set the VTEC crossover point too low, that the car won't run good. if true, why? isn't the VTEC lobe just a higher cam profile, right? how does activating VTEC early affect engine performance?
__________________
2000 Honda Accord LX Satin Silver Sedan  AEM ColdAirIntake Neuspeed Sport Springs Nitto 450 225/50 Prime Racing M8 17x7 S15 vs AE86 - 2006 HotWheels Touge 
|
|
|
|
|
01-02-2002, 01:12 PM
|
#2 | |
|
AF Fanatic
Join Date: Dec 2001
Location: Newcastle, Washington
Posts: 13,231
Thanks: 0
Thanked 0 Times in 0 Posts
|
activating at too low of an rpm can reduce low end responsiveness due to the high lobe profiles of the VTEC lobe. like a high lift cam in a V8, sometimes too much flow is not good, especially at low rpm.
also, VTEC operates on oil pressure. all Hondas generate more than enough pressure for proper VTEC activation, but at low rpm, oil pressure is obviously lower as the pump is crank driven. in rare cases, VTEC may fail to activate due to low oil pressure. the bottom line is low rpm response... setting the crossover too low will cause the car to perform poorly at low rpm after VTEC crossover |
|
|
|
|
|
01-04-2002, 01:19 AM
|
#3 | |
|
AF Fanatic
Join Date: Dec 2001
Location: Austin, Texas
Posts: 1,762
Thanks: 0
Thanked 0 Times in 0 Posts
|
that makes sense. i tried to relate to it like that, but my imagination couldn't see it...now i can, THX.
__________________
2000 Honda Accord LX Satin Silver Sedan AEM ColdAirIntake Neuspeed Sport Springs Nitto 450 225/50 Prime Racing M8 17x7 S15 vs AE86 - 2006 HotWheels Touge
|
|
|
|
|
| ||||||||||||||||||||||||||||||||||||||
|
POST REPLY TO THIS THREAD |
 |
|
|
