Did I blow my motor?

[MAGN1T]

A wideband is a complete waste of time if you don't have the ability to monitor knock.
Wrong afr will cause knock but so too will wrong timing.

Steve

[Leiden]

I actually did the whole turbo conversion myself, I rang around for a dyno shop and the one we do have in Whangarei doesn't have a lambda readout :/

It was actually running 8psi, not 12psi.

But yea, going for a full rebuild hopefully!

[RomanV]

You'll be best off getting the car running NA again and sell it that way, and sell the turbo kit. Rolling bodies arent worth nearly as much as running cars.

[fivebob]

But yea, going for a full rebuild hopefully!

You don't know what's wrong with it and you're going for a full rebuild

[Leiden]

LOL,

Okay I mean a freshen up, hoping to find the culprit when I strip it down,

Will be using 3SGTE ST185 pistons, machined with extra dish (about 10cc's over factory dish) for 10.0:1 compression,

ST185 3SGTE Rods,

New rings, cylinder hone, ACL race bearings (or factory bearings)

Proper TUNE!

[RomanV]

PM 'distrb' as he's gone through this all already...

Not sure if previous gen 3S pistons can work, I think the valve recess on the pistons are on the wrong angle or something like that.

[MAGN1T]

You might get away with just one piston, hone, new rings. It would pay to do the bearings though when in bits. Then decompress it a bit.

Steve

[Leiden]

I was thinking of keeping the compression the same at 10.5:1 and getting a good tune,

With 10.5:1 compression I can keep using the stacked 2x metal gaskets, and just have the valve recesses on the 3SGTE pistons cut to the Beams 3SGE spec,

Anyone know if the 3SGTE pistons are forged from factory?

Or are they only stronger than the 3SGE pistons because of the extra meat from not having as deep a valve relief cut into them?

Will they still be stronger than 3SGE pistons even with a little machining (4-6cc's)

[RomanV]

Could possibly turn out cheaper/better to get an auto engine block instead of fixing that one, if the damage is major, and you want to run with standard pistons again...

They start out with 11:1 compression instead of 11.5 for starters, and steel valves instead of titanium (every broken NA altezza motor I've seen, has been because of broken titanium valves)

[Celica RA45]

try using st215 turbo pistons and rods as they use the same valve angle and the head is very similar to a altezza head but no vvti thats all

[Leiden]

Do you know if the ST215 pistons will fit the 3SGE without any modifications to the valve recess?

Do you know what compression I'll end up with?

Also are the ST185/ST205 rods the same as the ST215 Caldina ones? Can get some ST185 rods because the ST215 pistons I'm looking at have a bent rod on one of them (Trademe )

[Celica RA45]

they should be the same as a st205 rod

[Leiden]

Do you know if the ST215 piston will fit without any problems, I wont need to get them machined at all?

[Celica RA45]

as i said same valve angle for st215 motor and 3sge beams have the same head and also the same height but with no vvti
so use st215 pistons to fit no machining and use st205 rods and 1 std altezza head gasket to suit .

[Leiden]

Any idea on the compression I'll end up with that setup?

So to confirm ST215 pistons are a bolt in fit and will work without any machining to them at all?

Could I use ST185 rods instead?... cant seem to find any ST205 rods around,

Thanks,

[Dell'Orto]

PM anth_555, he may have a set of ST205 rods for sale soon.

[Celica RA45]

do the st185motors have oil squirters or do the rods have a hole for squirting oil .the comp will be around 9 to 1 there abouts so dont shave the block or head if you dont have to

[Leiden]

Hey

According to this page here:

http://www.gtfours.co.uk/pics/pistons/2 ... istons.htm

It looks like the ST185 pistons have pinholes that the ST205 pistons don't, they both look like they have a cut out in the skirt for an oil squirter

Don't know if this means they both would use the same rods though ?

Sweet 9.0:1 with the 3SGTE ST215 pistons in the Beams Block, sounds like a perfect little set-up really!

[Leiden]

According to this website:

http://www.zerotohundred.com/newforums/ ... ences.html

These following parts are interchangeable between the ST185 2ND and ST205 3RD Gen:

Rods & bearings
Crank & main bearings
Crank pulley
Pistons & rings (3rd gen has slightly lower compression , otherwise the same)
Flywheel and clutch
Cam gears
Idler bearing #2 (also same as 5SFE)
Distributer
Turbo and downpipe
Most engine sensors

So I guess its okay to use the ST185 rods?

[fivebob]

Sweet 9.0:1 with the 3SGTE ST215 pistons in the Beams Block, sounds like a perfect little set-up really!

It would be sweet if it were true, unfortunately for you it is not

3S-GTE cylinder head has approx 47cc combustion chamber and 11cc piston dish (these figures aren't as accurate as they could be because I don't have the right tools at hand to measure them properly)

I believe the BEAMS cylinder head has a 33cc combustion chamber. So ST215 pistons in a BEAMS engine, assuming the same piston to deck clearance and head gasket thickness, would give a CR of approx 11.25:1

Also I don't think the valve angles are the same as a BEAMS head, as the ST215 engine uses the same basic head as the GenIII SW20/ST205, not the BEAMS head as Celica RA45 has stated (maybe he's confused it with the 3S-GE ST215 which is a BEAMS engine.)

As to the conrods, the ST215 rods are lighter (and weaker) than the SW20/ST205 rods, that's probably why the one on tardme is bent Sadly that's a common fault in Caldina engines that have had the boost raised, and I certainly wouldn't recommend using a set of pistons from a motor that has had a bent rod

Why don't you do things properly and buy a set of Toda pistons which are made for your engine and will give you the correct compression ratio?