Hey Jibby,
I haven't measured the gains on dyno, so I don't know if I gained anything substancial, but I certainly didn't loose, 0-60timer in the car showed 0.3 seconds faster, and 3 seconds faster lap times on the zandvoort F1 racetrack in holland, so
the thing most obvious with that conversion was the torque being there longer in the RPM range than with a stock manifold,
but most important: gas response was through the roof compared to a stock 4age, blib the throttle and instant power at the wheels, which prooved kind of tricky on wet track and worn out dunlop tyres....:11:
I was fiorst also pretty skeptical about wether this would work on a stock toyota ECU, but it ran just as nice exept for Idle which is pretty tricky to set up using only ITB's without any idle stepper motor or something.
Maintenance wise there's noting else as far as I used it, just one air cone filter to replace and sometimes the airbox would come of for inspection and balancing the throttle-valves (only to get a good set-up once it was Ok I never looked at the set-screws again) when it was of I cleaned the TB's with a little cloth and wd40, not much dirt, but since the box was off anyway.
One thing: I didn't have power brakes on the car (the yellow sylva striker in my avatar) but both R1 and Busa ITB's have vacuum lines after the valves, so if for a 1uzfe all 8 would be put into a closed canister you could feed of that.
same goes for PCV and EGR, I took the EGR system of the 4age, so if you'll use it you might experience a little more dirt going in the ITB's, for the PCV system use a seperator/catch tank you'll be fine.
indeed I was talking AFM or MAF, Map sersored system might be a little harder to get going right but you still should be able to do so.
I think one could even get a 1uzfe to run on 2 seperate 4age 20V ECU's but some radical thinking in the sensor department should be done.
almost all 8 and 12 cylinder BMW engines have it that way stock.
Grtz Thomas
