tvis problem???

[lammi_rolla]

well as i believe from reading stuff all over this site do far...the tvis is supposed to give your car more power in the lower revs...thing is my car has no guts in the lower revs compared to other 4age's so does that mean i could have a problem with the tvis.

[REN69]

I doubt it.. TVIS is just a second set of butterflies in the intake that let more air in AFTER a certain RPM. Its like the VTEC system in a Honda but not really, TVIS opens the butterflies around 4000rpm and more air comes in. You can hear it kick in and feel the car get a bit faster.

If your problem is at low RPM then its something else, you might need a tune up or maybe even a clogged catalytic converter.

[lammi_rolla]

oh ok so i was thinkin the opposite, my car kicks in around 5000 revs, but it kinda hesitates at 4500.

[lammi_rolla]

Originally Posted by lammi_rolla

oh ok so i was thinkin the opposite, my car kicks in around 5000 revs, but it kinda hesitates at 4500.

Just read the thread on the ecu reset and teach on dorikaze.com and think i might have found the answer to all of my problems...didnt realize ecu's were so smart.

[othick]

tvis kicks in at 4400rpm's there is a small dip in power right here. Check out this dyno, pretty typical of a stock 4ag. http://whyturbothat.com/4agedyno3.html

[lammi_rolla]

thanx heaps for that

[coyoteboy]

TVIS does increase torque in lower revs by increasing intake gas velocity and mixing - without it there'd be less guts than now (as noticed by a few people who've ripped it out entirely) but the difference is minimal.