1JZ-VVTi output limit - 260-280kw it seems =|

[joey]

Anyone have any head flow figures between the original 1j, vvti 1j, 2j and vvti 2j? Would be interesting to see there really is somewhat of a big difference.

[Fantapants]

there is a big difference.

on pf, tk has a thread on the 1j and 2j heads with porting and flowbench data. not too sure about splashing his data around, but cant be searched under tk 1j engines etc.

[sleepercorty]

i think you will find the main reason is that most peoples budget only allows for those sort of mods as it will cost you alot more to make 400kw than what it will to make 300kw's

[beerhead]

Die grinder + commodore AFM conncted to a multimeter and an inline 240V AC extension blower = ghetto flow bench love

[iwantablackrz]

I was under the assumption the main restriction was that the exhaust ports are too small. Obviously this improves the low down torque and probably improves the rate in which the CT15B starts to make boost but obviously in a higher powered application that's going to be an issue.

I'll agree with the general consensus though. 'Most' Vvti 1JZ seem to hit a wall at 280rwkw'ish. There's a few getting around that push through the barrier though.

[50RTD]

Die grinder + commodore AFM conncted to a multimeter and an inline 240V AC extension blower = ghetto flow bench love

Hahaha classic!