powerband question - Toyota Nation Forum : Toyota Car and Truck Forums

89TCGTS · 05-11-2005, 08:10 AM

I was just wondering.....does eveyone else's powerband start at around 4500 rpm? cause i have little to know power before there with my 89 gts with a jdm 4-age.

bob022004 · 05-12-2005, 05:36 PM

Is it a TVIS motor?

89TCGTS · 05-12-2005, 06:11 PM

yes i have the TVIS

BigNazty114 · 05-12-2005, 07:12 PM

the TVIS makes it so you get your power 4500rpm. Google search the TVIS system and you'll understand why, I lost the link to a site that explained it

bob022004 · 05-12-2005, 07:24 PM

Basically its just your intake has 2 runners per cylinder and the 2nd set doesn't open until @4500rpm. the later non-TVIS motors made more power. the big reason was an attempt at a combination of economy and power. economy as long as you short shift but power if you go WOT and let 'er run was the thinking.