ok, i guess it's time i jump-in here. whay kind of budget are we woking with , here? i know someone with the injectors you need. unfortunately, they won't be free. they won't be huge money (i don't think) but definately not free.
with the pressure switch, i don't know that it'll be 'fast' enough to help with a high boost condition. you'll also need something to drive or cycle the injector. i think you should be careful with ghetto-rigging a Toyota...there are better ways. 'cause if you screw it up, it's a bitch to fix. i wonder if the 'old school' tricks that TRD/TTE used to use on the 3SGT-E and 4AG-E would work for you...

 

blewMR2...Well the 440cc MKIII injectors are easy to find.

Go to www.supraforums.com (MKIII section)or www.supramania.com and ask for them. We all upgrade to 550's so i'm sure a bunch of people have the old ones laying around.. prolly just need cleaning up.

 

Let me get this straight...you WANT 550s?

My car comes stock with 4x550s...you find me the best price on 4x1000ccs and i'll sell ya mine.

 

jUST GET A SET OF RC INJECTORS, BEST ON THE MARKET

 

i think the idea was to stay within a very limited budget.

 

that it is

 

i have so much to pay for still to complete the 5sfte so i'm just gonna go with a 5th injector