Great stuff!

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Kris
95 ST205 - slept for 10 years, now waking up...
Avensis
http://www.gtfours.co.uk
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Turbocharging - the replacement for displacement

A bit more regarding 2JZGTE pistons. According to last photo (2JZGTE vs ST205) we can see that installed 2jz pistons in 3s bottom end gives 1mm “understroke”. Also, if oil nozzles in cylinder block will be well adjusted to hit oil port of 2jz piston – you will get cooling benefit!
Disadvantage – 2jz pistons have no oversize, only 86mm.



Also i'm using ebay's 320 bucks eagle conrods, it holds 500+hp and 8000+ rpm. (photo with st215 pistons, before installing to engine block)



Chris-de-Bear
How much extra clearance are you running ?
How does this compare with the wear on a typical 100K mile engine ?
As said above, the cost difference for standard vs. forged pistons is probably not great and the forged pistons will take more abuse so for an engine being rebored I would still be inclined to go the forged route.
I'm just pondering the possibility of a bit of heavy duty honing on a worn block and sticking with standard bore to maximise wall thickness.


.08mm. IMO 100KM just can be rehoned if it wasn’t overheated before
As I know, JE recommends minimum .010 piston-cylinder clearance, it is other one hit to life of hone (cold start, TDC relaying)


TrackToyFour
Is this an ST185 fitted with a Gen 3 or Gen4 3S-GTE? ….Looks like coil on plug ignition. It would be good to hear the details on the electrical system mods too

It is mix of gen2 block-stock conrods-crank, gen3 (st205) pistons, gen4 (st215) head +1mm intake valves, Brian Crower stage3 cams, Haltech ECU unit and MSD coils.


dale
certainly some very very nice motors there, and the attention to detail is fantastic.

i just cant help but kind of feel what chris says in that the forged items will be less prone to the adverse affects that could happen from slightly poor conditions

fantastic to see stock pistons though, well done indeed!!!!

i don’t try to convince anybody that forged pistons doesn’t stronger than stock toyota items, maybe it is. I spent 100 euro for stock st215 pistons and other 100 euro for milling works - 200 euro, 4 times cheaper than JE.

Almost sure that 2 of 3 problems with stock toyota pistons (reliability) are covered in thoughts of car owner and it sounds like this – “mmm… my engine already run for 10-15 years and have 60.000-100.000 miles behind and it’s seems to me that i need more power, but friend of mine told that stock pistons wouldn’t carry out more than 350hp, and i have to buy forged pistons. So there are no other possibilities except an engine rebuild. Ok, lets have fun with overboost and full throttle before rebuilding...."
And of course previous owner of the car was old lady and was driving exceptionally to nearest bakery, that’s why engine is in very good condition and should sustain.
I saw EGT gauge in stock st205 car with 1.2bar boost, temp was around 1050-1100C....When my engine runs ~2 bar of boost temp around 860-880C.

Hi Gary,
thanks for hooking me up with that infos on mr2oc.com.
i follow your thread.quit informative stuff here.
i would had better details for my posting if i had a unmodified gen3 3sgte piston to compare back in the days with my caldina pistons.but the dish was flattened so i only was able to tell the hight info is the same (talking about fitting aftermarket gen3 3sgte pistons in a gen4 engine) nevertheless back to your topic!

i have one question in fact : would you say that St205 pistons are stronger than St215 pistons due to the thickness of the dish?

demonslayer,

I am not in a position to comment re comparative strength.
Only one thing is for sure, detonation will destroy all pistons!

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ST165 turbo 4WD
ST185 GT-FOUR RC Carlos Sainz Limited Edition 825•5000
ST185 turbo 4WD Carlos Sainz Limited Edition 2541•5000

Just pointed someone to this thread and dissaapointed to find many pictures gone. There was some very useful research & info here and it would be nice if the pictures could be re-instated if possible. Or is it just my PC having an off day ?

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If at first you don't suck seed, try drier grain.

same here, i too would like these pictures back if the original poster could please re host?

Hi,

+1 , a very usefull thread, but just with pictures

i'am not sure about this is the right thread for my question but,

do all 3S conrods had a oil hohle in the big end?

here my gen.4 for example







greetz

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KEEP COOL UNDER PRESSURE

street legal?.....perhaps in tschibuti

Off Topic but...
BLOODY HELL YOUR OVERSIZED ROD AND PISTON IS BIGGER THAN YOUR FOOT!

gen3 have them, don't remember about gen2 ones

Hi,

lol, i take it as compliment

you should smell them after work

bozo merlin, i found there a lot of different conrod part number listened, nearly every genereation have a different one, this is why i'am asking

greetz

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KEEP COOL UNDER PRESSURE

street legal?.....perhaps in tschibuti

done! i forgot to pay hosting

thanks for that!

Indeed, thanks very much.

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If at first you don't suck seed, try drier grain.

The ST215 rods appear to be drilled looking at the drilling in the big end bearings


Must admit I didn't check whether it was a blind hole or exited the rod

Does anyone know if the ST215 head gasket will fit an ST185 (rev 2) engine?

Stephen

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1993 Carlos Sainz 2939, Forged, Apexi RX6B turbo with external wastegate. MOTEC M4, AFPR and 800cc injects. 3" exhaust, +1mm valves.ST205 cams. Rays 8.5" x 17". 205 rear subframe. Bilstein coilovers. 205 brakes.TRD diff