3sgte turbo upgrade? Need help!

[Shifty]

Interesting re: the GT28R. I'm looking at an upgrade soon but will probably go a little bigger than that. Any more pictures you have of that car would be great for interest's sake.

I have an ST215 turbo for sale. These things make 260ps stock and according to info I found online they will bolt up with only minor mods.

See the for sale section.

[jonathan yee]

I have an ST215 turbo for sale. These things make 260ps stock and according to info I found online they will bolt up with only minor mods.

See the for sale section.

that wont bolt up to a gen1 or gen2 3s head. only gen3+. diff port and stud pattern.

[mattysshop]

Interesting re: the GT28R. I'm looking at an upgrade soon but will probably go a little bigger than that. Any more pictures you have of that car would be great for interest's sake.

I have an ST215 turbo for sale. These things make 260ps stock and according to info I found online they will bolt up with only minor mods.

See the for sale section.

reason why he went with the GT28R - it's so driveable.. like you can change at 3500 rpm each gear and be infront of most boy racers on the road.. it's in a GT'2' converted ST162.. one of our mates used to have a 3sgte gne 2, in a white AE92 Seca, ran a GT30 (not 100% sure which variant) with all the supporting mods... it was about even with this celica on the freeway in top gears/high rpm, but offf the line the GT28R was way more responsive (obviously).. due to traction issues and very very very bad 'kingstar' tyres this celica has only run about 13.4 but that was spining 1st, 2nd, some off 3rd..

John From BT&T has run these GT28R's on many 1.8 & 2.0L engines (mostly mazda and mitsi) in his MX-5 racecars.. there getting in the vicinity of 330RWHP on about 19-21psi..

definitly an understimated turbo.. but yes it is slightly on the small side... there about the same size externally as a CT26.. but with the front housings off you can see the difference

i really can't put into words how much more responsive the GT28R is than the CT26.. like you find you have all this extra torque and perkyness, and still have some very decent top end..

[davidleonardi]

Easy upgrades - Twin-entry CT26 (ST185) would be a big improvement... Or, CT20B (ST205) would be even better!

Harder upgrades - GT28RS for some extra power with response... Or, GT3076R for really good power!

Hi..

You were saying: " Harder upgrades - GT28RS for some extra power with response... Or, GT3076R for really good power! for ST185 engine upgrade.
I want to know if I change to any of those turbos, can I still keep stock internal or I should upgrade the internal too ?

[w0n0matic]

Hi..

You were saying: " Harder upgrades - GT28RS for some extra power with response... Or, GT3076R for really good power! for ST185 engine upgrade.
I want to know if I change to any of those turbos, can I still keep stock internal or I should upgrade the internal too ?

depends,

how much boost you run, what management you use etc.

[twentyEight]

As said above, I think stock internal will be fine with a decent engine management system providing the boost isn't excessive... If you wan't to run ~30psi boost, then an upgrade would be advised...

I will be running a GT2876R for the moment, and when I can afford it, I will be upgrading to a GT3076R, and I will be running standard internals... I'm using a EMS Stinger for engine management...

[davidleonardi]

depends,

how much boost you run, what management you use etc.

I just would like to run on boost maximum 1 bar only. I am using the Haltech E6X.
Please advice. thanks.

[Roundy]

1 bar on a GT3076 is possible.

once again it all comes down to the tuning, the stock internals won't be as tolerant to poor tuning.

[davidleonardi]

1 bar on a GT3076 is possible.

once again it all comes down to the tuning, the stock internals won't be as tolerant to poor tuning.

Ok thanks a lot for tips.

[The Real Roadrunner]

1 bar on a GT3076 is possible.

once again it all comes down to the tuning, the stock internals won't be as tolerant to poor tuning.

We ran 1.5 through my stock Gen3 and never had any dramas, it was tuned correctly though.

[davidleonardi]

depends,

how much boost you run, what management you use etc.

I'm using Haltech E6X. I want to run boost max 19psi. which turbocharger would you suggest without having to do internal mods. Although I have changed to OEM but ceramic coated pistons.

Pls advice. thanks.

[Shifty]

A few posts ago you were going to run 1.0 bar, now you're running 1.3 bar... you really need to make up your mind or you will end up with a car that goes bang or a bunch of parts that don't do what you want them to.

The standard internals will be fine at around 1.0 bar with an appropriate tune. Anything more than that, or if you want to get a little more aggressive with the tune, you will need forged pistons and as you've got the engine apart it would be silly not to do the rods, bearings, oil pump, etc.

[davidleonardi]

A few posts ago you were going to run 1.0 bar, now you're running 1.3 bar... you really need to make up your mind or you will end up with a car that goes bang or a bunch of parts that don't do what you want them to.

The standard internals will be fine at around 1.0 bar with an appropriate tune. Anything more than that, or if you want to get a little more aggressive with the tune, you will need forged pistons and as you've got the engine apart it would be silly not to do the rods, bearings, oil pump, etc.

Ok I'm sorry I thought 1 bar is equivalent to 19 psi. pls inform me what's ratio between bar and psi ? What's the maximum boost according to yr knowledge would be best suitable for my spec ?

[mattysshop]

it varies from source to source, but it's 14.5psi - 14.7psi = 1 bar..

[Shifty]

Ok I'm sorry I thought 1 bar is equivalent to 19 psi. pls inform me what's ratio between bar and psi ? What's the maximum boost according to yr knowledge would be best suitable for my spec ?

The problem is that there is no "suitable" amount. It all comes down to the package - cooling, fuel & ignition tuning, turbo selection, fuel choice, etc. Personally, any more than 1.0 bar or 14-15psi is where you should definitely start to look at a motor rebuild with forged pistons.... but there are plenty of people out there who have run 20+psi on different engines without adding forged pistons.