3SGTE Gen 2 How much boost?

[fivebob]

He could have sucked in some water and hyrdo'd the engine to bend the rods

That's a pretty wild stab in the dark. Just the sort of thing Toyspeed (and car forums in general) is well known for

Seeing as he has a Caldina under rebuild I'm guessing it's a Gen-4 engine which are known for bending rods with only slight provocation

[DriftSpecStarlet]

Lol your funny as... Hey who knows lots of people who tinker with there cars sometimes place intakes in funny places...

[blitza]

forums, if only they weren't full of crap statements and large signatures.
yes, it's under rebuild- again. 80,000km ago was the initial rebuild, required after the ringland incident, was running 23 psi mind you. This time around the motor is out for a trans change as after 200,000km, big boost and towing a heavy trailer the slush box is getting , well slushierer. And the head suddenly got the rattles, so it's all getting a swish up.
Its been running std boost for the last 80,000 as i was intending on fitting a frontmount, which is more likely to actually happen this time around, and some exhaust gas monitoring bizzo before cranking it back up to big fun boost.

It's a 97 st215w with the oil filter hanging low on the front, so I'm arseuming it's a III

and as i/c's are supurb at absorbing stuff like water splashed from puddles etc and i haven't forded any rivers since i drove a skyline, I'm pretty certain it wasn't hyrdo'd.

I'm a fan of smaller problems rather than stronger solutions.

[blitza]

turns out i've bigger probs, Broken piston skirt from oil control ring down, had a chunk broken off. Perhaps the head wasn't rattling at all!

[fivebob]

It's a 97 st215w with the oil filter hanging low on the front, so I'm arseuming it's a III

Only if you believe Toysport who say there is no such thing as a Gen IV 3S-GTE

To my way of thinking and engine that basically only shares the crankshaft, valve gear, and exhaust cam with the Gen III is a different generation. So at the very least it's a Gen III.5, but I prefer the Gen IV label for clarity.

turns out i've bigger probs, Broken piston skirt from oil control ring down, had a chunk broken off. Perhaps the head wasn't rattling at all!

Probably due to the bent rod(s) causing the skirt to hit the crankshaft.

[strx7]

the GT-T shares its conrods with the 3SGE single VVTi Engine, Shares its head with the ST202/ST205 So I'd have to say its a gen 3.5 not a 4. If it had dual vvti or even the narrow valve angle of the Altezza motor I'd happily call it a gen 4

[fivebob]

the GT-T shares its conrods with the 3SGE single VVTi Engine, Shares its head with the ST202/ST205 So I'd have to say its a gen 3.5 not a 4.

It does not share the head, it's completly different, no distributor, cam sensor is fitted inside the head, there is no oil catch can return port either, and single VVTi engines are classified as Gen IV (according to Toysport).

If it had dual vvti or even the narrow valve angle of the Altezza motor I'd happily call it a gen 4

There I disagree, it doesn't have to follow that the GenIV 3S-GTE shares the same development path as the GenIV 3S-GE.

[blitza]

Probably due to the bent rod(s) causing the skirt to hit the crankshaft.

nononono, the bent rods were 80.000 ago, and the rods were only 'tweaked' about 0.020 to 0.030" just below the little end. I put in eagle h beams and wiseco's. Now it's lost a piston skirt, and all the pistons have cracked skirts in similar places. I'm guessing it's a forged piston/large clearance/driven nanaish most places problem.

so you're saying it's a gen 3.5? ( no distributor, cam sensor is fitted inside the head )

Anyone got a spare block laying around that they'd sell?

[fivebob]

Now it's lost a piston skirt, and all the pistons have cracked skirts in similar places. I'm guessing it's a forged piston/large clearance/driven nanaish most places problem.

Then I'd suggest trying some Mahle Pistons. They're made from 4032 Alloy which has 11-13.5% silicon in it. They won't expand as much and can be run with tighter clearances, so no forged piston slap.

I'd still be checking that there are no other marks on the piston from things like the crank, or oil squiters, as I'm not entirely convinced that forged piston slap would be enough to crack the skirts.

so you're saying it's a gen 3.5? ( no distributor, cam sensor is fitted inside the head )

Yep at least a III.5 if not a IV

[blitza]

wow, those Mahle pistons have 0.0016 min and 0.0024 max clearance, that's a whole shit load less than the W'co's shitters, and at 499usd not too badly priced.
Now, for a new block....

[strx7]

the GT-T shares its conrods with the 3SGE single VVTi Engine, Shares its head with the ST202/ST205 So I'd have to say its a gen 3.5 not a 4.

It does not share the head, it's completly different, no distributor

there is a rubber half round bung where the dizzy is to go and all the castings on the end of the head to bolt the dizzy to, change the rocker cover and camshaft and you have a head that will go onto an earlier engine. the rest of the castings that matter - manifold faces, water housings etc are all the same

[blitza]

here y' go 5Bob, now we've just got to wait for me to get around to fitting them....