3SGE and 3SGTE 3rd gen Diffrences Options

[Alan]

Hey guys its me I am back in the game hehe, I need some info with anyone who can help me out I need to know the main diffrences between the 3SGE and 3SGTE 3rd gen cylinder heads, I need to know what valve cover fits the 3SGE and if a fuel rail of a 3sgte will fit a 3sge head any other diffrence anyone knows please le me no

[delusionz]

6tfour you may want to edit your post when you realise what the discussion here is about.

First and foremost, the 3rd Gen engines DO NOT have any form of valve timing, they have ACIS which variates the length of the intake manifold runners.

valve overlap adds a supercharging effect to an NA engine, as the exhaust pulse is exiting through the pipes it creates a vacuum behind it, the moment that both valves are open after the exhaust stroke has finished and the intake stroke is beginning, it serves to pull air in through the intake. on a turbocharged application all this does is leak boost out the exhaust.

why do I talk about rev limit? the st205 3s-gte has a redline of 6800 with peak power at 6000, this allows you to hit your peak power and rev out somewhat so the next gear drops you into maximum power and boost.
the st202 3s-ge has a redline of 7000 and a peak power of 7000, this is done simply to juice as much power from the NA engine as possible, the gear shift will drop you out of peak power but you'll hit the 177bhp mark atleast once instead of hitting a plateau and a momentary pause in acceleration.

why do I talk about engine durability? the st205 3s-gte was not designed to rev over 6800, with cams dialed in for a peak power at 7000, calling for a rev limiter increase to perhaps 7800??? this brings factors into play such as the crankshaft balancing, strength of the valve springs and all the other jazz associated with the design of an engine according to how high it will rev and how much power it will put out at those revs.

why do I talk about low end response? camshaft profile has a trade off (which VVT compensates for, but since you've missed the point that we don't have any form of Valve Timing in this case.) the trade off is between power at high revs vs torque at low revs, the 3s-ge camshaft profile is a higher rpm profile than the 3s-gte so go figure.

if you go back to the original post, it only mentions cylinder head differences between the two 3rd gen 3S-G* engines, then this turned into a conversation about the intention of making more power from the st205 3s-gte bottom end with the st202 3s-ge head. but if you want to compare high power engine durability of the entire engines its easy, the 3S-GE has high compression, which means lower boost potential. It may be safe to run 7psi on the 3s-ge and get 250bhp with good response all the way through, but the 3s-gte is safe to run 18psi and surpass the 300bhp mark. case closed?

I honestly didn't think someone would make me have to spell this stuff out, especially not a fellow st205 owner...