ST215 3S-GTE running stock, what is most boost I can run?

[JavierU]

Whats the maximum and stable boost I can run on the caldina without spiking, or blowing up my engine??
Don't know how many psi is running now but cant be more than 7 psi, i was thinking on boosting up to 12-14 psi but don't know if the engine will take it.

what does everybody suggest?? is it safe? or whats the must recomendable amount of boost to run on it?

The Caldina is stock on setup.

[Cuts]

15 psi is more then acceptable.

[stidnam]

From what I read I wouldn't go over 14-15 psi or else you might grenade the motor. The ST215 is weaker than the ST205 as I think it is the pistons that fail and so doesn't handle as much boost. Have a look at toyspeed.org.nz and see a few threads on there about what it can and can't handle. I plan on using 14 - 15 psi as my max

[JavierU]

From what I read I wouldn't go over 14-15 psi or else you might grenade the motor. The ST215 is weaker than the ST205 as I think it is the pistons that fail and so doesn't handle as much boost. Have a look at toyspeed.org.nz and see a few threads on there about what it can and can't handle. I plan on using 14 - 15 psi as my max

I was planning on going for 12 or 14 psi max, but i really dont know if it will take it, and for how long, ill check the toyspeed.org.nz and see what i can find thanks.

I hope some caldina owners show up here an give me their opinion anybody else has an opinion??

[JT252]

i thought it was the rods that were weak.

[Cuts]

yeah rods are the issue.

[CraigD]

from what i read its 8psi in 1st and 2nd then 12psi in 3rd and 4th.
I dont know if this is correct because i dont have a boost guage on mine yet.

cheers craig

[oldcorollas]

yup, apparently 12psi in other than 1st/2nd stock anyway

[mattysshop]

just out of curiosity with the gen 4 3sgte, is it the rods that snap like black top 20v 4ag, or is it due to rod bolts?

for arguments sake if you say used some better rod bolts could this help the problem?

[JavierU]

from what i read its 8psi in 1st and 2nd then 12psi in 3rd and 4th.
I dont know if this is correct because i dont have a boost guage on mine yet.

cheers craig

I've read something like that but havent found a way to make it 12-14 psi from 1st and up, anyone has an idea how to boost it up even?

[Fodder]

Not sure if it's different to the setup in the celica GT4s, but on those versions you can block off the T-VSV line to give you the same boost through all gears.

Unfortunately the line is what lets it run the higher boost in 3rd/4th/5th, so you're stuck with the lower setting, but can then bring it up with a boost controller and have it stable.

[JavierU]

Not sure if it's different to the setup in the celica GT4s, but on those versions you can block off the T-VSV line to give you the same boost through all gears.

Unfortunately the line is what lets it run the higher boost in 3rd/4th/5th, so you're stuck with the lower setting, but can then bring it up with a boost controller and have it stable.

ok, im planning on buying a apex'i avc-r boost controller, i've read a lot and it seams to be a good choice, now, how do i block the T-VSV line?? i've read that its the same setup as the GT-4 is there a do it your self thread here? havent found one yet

[Fodder]

It's not too tricky - there's two lines running into the wastegate actuator - one from the compressor housing, and another one that goes around to under the inlet manifold - the second one is the one you need to block off.

Best guide I've seen is here.

[JavierU]

It's not too tricky - there's two lines running into the wastegate actuator - one from the compressor housing, and another one that goes around to under the inlet manifold - the second one is the one you need to block off.

Best guide I've seen is here.

ok it seems pretty easy, but the only thing im not sure is that if there will be any trouble because the gt4 is AFM based and the caldina is map?

[TRD_021]

Im not too familiar with the ST215 but the're a lot of 205 that have done this mod with no issues. Im sure it would be fine. just though I add my to cents