3SGTE over boosting?

[Fodder]

Just so you know, the tvis and t-vsv are different systems - the t-vsv (vacuum switching valve) is what you're playing with here, the tvis is the variable induction system in the inlet manifold.

[ST185GT4]

I think your both right.
I think I disconnected the turbo VSV not the tvis VSV earlier.

I think it was probably closer to 3000rpm when the boost was kicking in...

I'm going to check the vac lines now.

[mattysshop]

i agree with ditching the whole stock setup, and just going a plain aftermarket boost T valve.. some good ones are very effective and arn't too bad with spiking..

one of the best cheapest ones i've had was a turbo XS boost t... best $50 new i ever spent after a few cheap ball and spring valves that were literally made from a 3 way fitting, and a few barbs... they wern't very effective...

[Cuts]

leave the line on the actuator that used to go down to the back of the engine blocked.

buy a boost controller, fit in between the line from the turbo to the actuator...job done.

ive heared good things about those ebay turbotech ones.

ive used turbo xs and turbosmart boost tees in the past, they arnt as good as electronic boost controllers but better then stock,

[ST185GT4]

Thanks Cuts (and everyone else who's helpin),

I assume thats to leave the tvis still operational? But to over-ride the boost controller.

I've always wanted a HKS EVC 6 the one that fits in the vent. NICE...Are they any good, or should I just go with the quick fix?

So are we saying that its the turbo pressure VSV or the turbo pressure sensor that is stuffed???
The error code says the later when it over boosts.

[Cuts]

the turbo and tvis are completly seperate and nothing we have talked about will change that (which is good)

that will override the stock boost controller.

of course they are good, its hks, if you can afford electronic by all means get one, they are heaps better.

the pressure sensor is doing its job fine, its the tvsv (factory boost controller) thats no good.

[jonathan yee]

i remeber reading once that you could drill out the inlet/outlet's to the tvsv to allow more air to be bleed and raise the boost. this is possibly what has been done.

other thing is do you want to run more boost than 12psi? if so then you'll need some sort of FCD.

either way you don't want to run 15psi all the time without being able to reduce the boost at all.

[ST185GT4]

I'll be happy to get standard boost at this stage. I'm hoping the turbo manifold will help the 2 1/2" single muffler exhaust but its still got the standard cat (for now).

I tried to get the tvsv off this morning and gave up. Its in a nasty spot. I can't even get the lead off.
Any ideas?

I brought a turbotech off ebay. Should be on before the weekend. What to set the boost at??? Hmmm.
Any ideas on that would be appreciated too?

[MWP]

Well you can go any higher than around 13psi due to boost cut, so set it at that.

[jonathan yee]

i think it's best to set it below boost cut, as otherwise on a nice cold night when your feeling like having a blast the boost will spike higher than what you've set it at and ruin all your fun.

even with the good EBC i would always get more boost when the air temp was lower etc

[ST185GT4]

Yeah i was thinking about something less stressful like 8-10psi.....

Whats stock? I thought it was 8-9psi, not sure.

[MWP]

Yeah, factory is around 8psi.

A standard gen2 3SGTE will be good for ~15psi (with a FCD) before fueling/tune becomes an issue.

[jonathan yee]

eh? i thought it's 7/8psi if you disconnect the tvsv but with the tvsv active and working properly you should get 10psi? well that what it is for my gen2 3sgte sw20 mr2.

[OnAll-FOUR]

Don't worry aobut removing the tvsv from the back of the engine. Just block the hose that leads away from the wastegate to the tvsv.

I think the Std boost in PSI depends on how you round your numbers, there isn't much between 7/8 vs 10 really.

7psi = 0.5Bar and 10psi = 0.7 Bar

[ST185GT4]

Went for a drive today. It was cold and raining. When I got home the turbo had a slight "glow" to it???

Now my standard radiator isn't in the best nick and neither is the tmic.

But a slight glow with ambient at 10deg max???

Is this normal???

Remembering its only boosting to 4-5psi at the moment, with the tvsv disconnected.