How good are the 3sgte GT4 internals?

[dougsop]

how good are the factory 3sgte gt4 (st205) internals?

when should i consider forge them?

[strx7]

personally i'd say if you are aiming for more than 400hp (FLYWHEEL) then forge them, if less than that its in the tuning. Be carefull with the std intake manifold as it will feed No2/3 more air than 1 & 4.

[Akane]

Be carefull with the std intake manifold as it will feed No2/3 more air than 1 & 4.

That's a speculation that only applies to ST185 type 3S-GTE's.

[dougsop]

well lets make it this way.

i've been to an engine rebuilder today in my St205.
he advice me not to do the engine rebuild yet...because i may end up paying loads and getting little return.
he said instead of the rebuild, get a GT25/40 turbo, fuel pump and 800cc injector.

my question here is, if i run the Gt25/40 turbo can my internal last?
wat sort my max power and boost can the 3sgte piston handle?

[strx7]

Be carefull with the std intake manifold as it will feed No2/3 more air than 1 & 4.

That's a speculation that only applies to ST185 type 3S-GTE's.

For a SPECULATION its seems to have lent a GOOD helping hand to killing No3 piston on FAR TOOOOO many peoples engines.

[ST205 GT4 NZ New Group A]

Doug did you get my PM ? Whats your number ?

[Akane]

Be carefull with the std intake manifold as it will feed No2/3 more air than 1 & 4.

That's a speculation that only applies to ST185 type 3S-GTE's.

For a SPECULATION its seems to have lent a GOOD helping hand to killing No3 piston on FAR TOOOOO many peoples engines.

Nobody can say for sure 100% if it's the intake runners or the single feed 4mm fuel rail bore is the problem (or the combination of the 2?)

1) Gen 3 (ST205) did not have this running lean problem - which should be aimed at the OP's concern

2) The Gen 3 had both 6mm fuel rail bore AND a revised intake runner, who knows which one is the real curlpit.

[dougsop]

Doug did you get my PM ? Whats your number ?

no didnt get ur PM.

[dougsop]

i've heard standard ST205 piston can only last up to 400 flywheel HP and 1.2bar boost.

is that correct ?

[RomanV]

Number three cylinder is the last cylinder to get coolant, that is sandwhiched between two other hot cylinders.

my gen 4 3SGE blew its guts out on #3, and it's got a completely different manifold design to any 3SGTE engine.

[Boosted_162]

Wont be dependant on boost, 1.2 bar of boost in a CT20B is a hell of alot less than 1.2 bar of boost in a T88 . Will also depend on you having the right fuel system and a good tune...

[Silent Knight]

How about we all just agree that the 3S series of engines are superior to Soarers all the time ay?

























mod edit: muahahahaha

[MR2SIK]

thread hijack:

So if building a decently powered 1990 3sgte, would using the intake manifold from a st205 era 3s curb the effects of this running lean on #2 & 3 cylinders? or is there a better option?

[Akane]

Thanks RomanV forgot about that too. Cylinder 3 exhaust side is getting the least cooling effect from coolant, there is also the "carboy mod" specifically for the ST185 type 3S-GTE.

What do I know anyway, I can't even change my own wheel bearing and I had to get help to put in my diff for my silvia.

[Al]

thread hijack:

So if building a decently powered 1990 3sgte, would using the intake manifold from a st205 era 3s curb the effects of this running lean on #2 & 3 cylinders? or is there a better option?

RMR intake manifold

[Al]

well lets make it this way.

i've been to an engine rebuilder today in my St205.
he advice me not to do the engine rebuild yet...because i may end up paying loads and getting little return.
he said instead of the rebuild, get a GT25/40 turbo, fuel pump and 800cc injector.

my question here is, if i run the Gt25/40 turbo can my internal last?
wat sort my max power and boost can the 3sgte piston handle?

A gen2 3sgte has made 440rwhp on stock internals (with new stock NON-metal h/g) and had boost of up to 25psi rammed through it with supporting modifications. Ran 11.1 @ 123mph in an mr2.

You have been listening to too many poms if you think 400BHP and 1.2 bar is the limit. BTW the poms use BHP, the B is for bullshite, because they guesstimate the tranny loss and add on a large percentage to make themselves feel better.