Bean

iTrader: (1)

there's hardly anyone on here with aftermarket turbokits on 1jzs here... so kinda off to make that kinda remark i guess... oh well

but got_trd is correct, the 1jz can do anything the 2jz can... dont like the displacement? bolt on a 2jz shortblock...

i'm still missing exactly what you're wanting to do... are you wanting to leave it stock? I think you'd have a problem with stock power? i'm just not understanding this thread correctly

qtb33

Well they claim to typically see a 100-300% strength increase. I have never heard anything bad about cyro-work claiming there are not huge gains.

So lets do the math:

W58 rated for lets say 450 lb-ft (it seems like a fair number). If you only see a 100% gain you have have 900ish lb-ft capability minumum. The 1JZ and 2JZ put down some impressive power but they don't typically make massive torque (of coarse there are exceptions).

Now money math:

$2.50 per # times maybe 60# of internals = $150 plus shipping charges. I would guess shipping would cost about $80-$100. This is of coarse if you do all your own work. If not that maybe a better route would be the R154 or V160

Results:

$250 for a tranny that will hold about 900 lb-ft

You be the judge

reamemiya

iTrader: (1)

cryo treatment is an option. so would you rather just cryo treat your tranny or bolt on a r154 which doesn't directly "bolt on." and people might want to keep their shorter gears and not run the getrag.

1jz can do everything that a 2jz can do?... if you're going to drop in a 2jz head into a 1jz why not save yourself the hassle and money and get yourself a 2jz? HECK why not just throw in a 3.4 liter stroker kit then any inline 6 can do everything the 1jz and 2jz can do all it takes in $$$ and doing internal work.

CP_Ree

iTrader: (1)

You know what, no offense to anyone, but nevermind. This thread goes like every other thread, it was suppose to be about what actually broke in the trannys, not what other tranny options are out there. I'm not mad or annoyed, I just don't find very useful information from a lot of these threads/posts.

I have to say I agree with rememiya also.

JspecSC3

iTrader: (4)

Sooooooooooooooooo....back to the topic. Does the 3rd gear synchro also give out on the W58? If so, how many ponies are you running?

JspecSC3

iTrader: (4)

This Cryo Processing stuff..will it really work? I hear talk from my friends about it. Im still feel a bit iffy about it.

got_trd

He was refering to the 2jz block, not head... Who would want to ditch a 1j head

I think you'd get a better reply over on Supraforums in the 1jz/2jz swap section. There are a few guys there running r154s in their mkiii's

JspecSC3

iTrader: (4)

ahhh i see..

ki_soarer

i was reffering to the W58 in my previous post.

i am actually glad that this thread got a bit off topic, because that chart is cool. there are positives to all options, its just a matter of opinion just like deciding between a 1jz swap, a 2jzgte swap, or going na-t. thats what makes the SC so great ......and depressing at the same time . but its all good. and i kinda answered the origional question anyways. at least that was my experience.

Bean

iTrader: (1)

I never said to drop in a 2jz head; go back and read what I posted; thanks!!!!

I said 2jz SHORTBLOCK... do you know what a shortblock is?
people that blow 1jzs sometimes swap in the 2jz shortblock since it bolts right up just fine without much hassle

if you guys think you'll get a 100% strength increase from cryo treatment; then be my guest... i'd bet money you wouldnt... you have no clue what Toyota has already done to the tranny when it is produced nor will you be able to get that information...

i wouldnt rate the W58 at 450ft-lbs either... that may be its maximum operating power; but I'd venture for 350ft-lbs as its designed load... stuff starts breaking once you get over this point

qtb33

If you're comparing maximum load to designed load your somewhat comparing apples and oranges. Due to this being a reversed stress cycle loading you truely need to look at the stresses that it is subject to and do a "Stress-Life analysis" because the material will probably fail from fatigue. You are correct that we will never get that metal material from Toyota or how it was treated. Although it is safe to assume that it is more than likely steel of some sort. By definition steel will fail if it is subjected to stresses over 212KPSI. It's just a matter of time.

So what I'm getting at is that everytime you do a hard shift, or launch the car, your probably exceding this 212 KPSI limit and are fatigueing the shafts/gears/bearings. Harsh impacts are very harrd to predict when designing machines. So it really comes down to maximum because you'll be pushing limits regardless of intended loading. Using slicks or unsprung clutches further increases this stress and shortens the life of the transmission.