nope!!! none of our engine and freind's engine has benn touched internally ever.. on my 245K engine I even ran with stock plug with 10psi for 3 month.. hehe.. but you shouldnt be..
well after 350 to 400rpw range, you will start to having a tranny problem.. none of 2jz NA transmission parts are desighed for the forced induction. 5 speed or auto.. if you want to keep the auto, go with BL tranny or SP one. if you want mannal. go with getrag 6 speed.
I am not saying you cant have a 400rwp with stock tranny.. but it is matter of time to break .
block is pretty strong if you tune your car property.
if you want to extra safety on you, buy TT pistons or buy a TT short block. good for alot of power

 

Thanks alot T51R. Im all smiles now

 

Thanks, this thread has been helpful.

 

no problem.. if you need any more help you can PM me or ask me here.. I will be more than happy to help you as I can ..
P.S if you guys looking for a turbo kit.. like what we have on our cars.. it is very cheap and reliable.
let me know

 

i also have a high milage sc300 about 117000K for a 97' , i was wondering if it was possible to keep my ge head and use a 1jzgte block and go na-t, anybody ever try that?

thanks.

 

why would you want to lower your displacement. dont waste your money into the 1jz .. you already have a good block.. if you really want to swap something instead of your NA.. useTT.
trust me on that..

 

well i figured it would be better to use a block that was designed for turbo, and it would probably rev faster due to its shorter stroke. and its probably way cheeper than a 2jzgte block. anybody have personal expierence?

 

as long as the valve stems are ok; i dont see a reason why you'd need to rebuild for only 500hp

if it blows who cares, buy a shortblock off ebay for $100-$200, i see them going for that price all the time... saw a jspec clip 2jzge go for $350 a couple months ago... jspec motor uses MAP and different injectors; but you can still swap the short block over; it'd be prettyeasy relatively speaking

 

Aite, I found out that my car just had its head gaskets replaced. So I believe it is safe to go turbo now. Any recommendations how much PSI to run on a 200k+ engine?

 

sorry, that question is too vague
you DO understand mileage is not a factor right?

your compression ratio, timing, fuel trim, and fuel quality ARE

93 octane, stock compression, timing retarded 2 degrees, can boost around 10-12psi no problem
100 octane, stock compression, stock timing, can boost around 12-15psi
these also assume you are running adequate fuel

lowering the compression is a new ballgame

 

Well the only reason I keep referring to the mileage is because I dont want the engine, which already has been put through so much stress, to break down because of the boost. I understand that compression is important and I need to get it tested. I just want to be sure that I'm not wasting money on a turbo when the engine is not up to par to handle it. I just want to spend around 5k for the turbo. I am still debating whether I should just save up big time and go with the 2jz-gte. Its about double the price, but its a better engine with more potential.

 

well like bean keep saying.. it can handle 400 500 easy on NA.. IT depands on good compression, tunning. I have doen NA-T for two cars and have seen many people has turboing their car.. have no issue. if you still dont like the block then just buy a TT if that will make you feel better..

 

I think Im going to stick with this engine. Thanks guys. I'll get the compression checked out to see if its ok to turbo.