Make a 2JZ N/A block, into a GTE one?

[Satan]

Getting ready for Houston and wanting to get things started before I leave...

I am going to get an N/A block to replace my TT block. They are inexpensive and plentiful. I'll swap over all of the oil pump and other things atahed to the block and re-use my recently prepped head. If the pistons are different I may swap them in as well.

I looked in all of the Supraforums stickys etc, but still do not have very complete info... and it now seems you can't create a new thread there (today).
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I would like to drop off at machine shop and have the oil squirters and oil-feed tapped into the block.

Will they know what needs to be done, or will I need to supply with thread pitch and other specific info?

Any other differences that they can address, besides these?

Thanks,
E

[The Reaper]

the blocks are the same. the NA block does not have the oil squirters but they aren't a HUGE deal. a guy on Club NA-T was making 700-800 whp iirc on the stock block.

the pistons are different. they are higher compression, to fix this you eed to either buy TT pistons (or swap them out in your case) or buy a 3mm head gasket to lower the compression and run the NA rods and pistons.

[hottscennessey]

Reapers right, but I personally wouldn't go with anything bigger than a 2-2.5mm HG unless you're on a stock ECU.

[The Reaper]

i thought for sure it was a 3mm to make it 8.5:1 comp.

maybe it was 2.5mm which pushed it a little closer to 9.0:1

but yea you get the idea hahaha

thanks scott

[Satan]

Good info...

Gonna be using a single turbo and do not plan on anything over 500HP... more like 400HP daily driver.

What about the oil feed from the side of the TT block... I guess sems easy enough for me to drill/tap.

Will definitely replace the rings and bearings while I am at it. Anything else to be done "while I am there?"

[The Reaper]

not that i know of.

i have a NA block sitting at Tissimo's house that i am planning on putting TT rods and pistons in it and making a 1.5J myself.

need to pull it apart soon though and look it over, cause it was pulled out of an SC300 that blew a HG and had really low compression. need to make sure there's no crank shaft damamge before i go about putting rods and pistons in it

[Jostar]

the blocks are the same. the NA block does not have the oil squirters but they aren't a HUGE deal. a guy on Club NA-T was making 700-800 whp iirc on the stock block.

the pistons are different. they are higher compression, to fix this you eed to either buy TT pistons (or swap them out in your case) or buy a 3mm head gasket to lower the compression and run the NA rods and pistons.

YOu sure about the pistons been different??? I thought they were the same pistons & rods, I thought i read somewhere that the only difference where of course the head & the very thin head gasket they have, The head gasket on the N/A 2j is 0.2, I can be wrong & i misread, Please feel free to correct me.

[hottscennessey]

They are definitely different pistons, but the same rods. The pistons are made of the same material/process at the GTE(so they're strong); that may be along the lines of what you read.

[csnow]

Good info...

Gonna be using a single turbo and do not plan on anything over 500HP... more like 400HP daily driver.

What about the oil feed from the side of the TT block... I guess sems easy enough for me to drill/tap.

Will definitely replace the rings and bearings while I am at it. Anything else to be done "while I am there?"

Go over to clubna-t.com There are a ton of threads on this very topic. Most people use the IS300 union bolt with the GE oil filter housing for the oil supply. Use your GTE pan since it has the return. There is no need to tap the block for the oil supply.

Chris

[The Reaper]

yes my information was spot on minust the fact about the HG which Scott pointed out. it was close but i haven't read about it in a while.

i think i might be getting the NA long block from tissimo here in the next week and go ahead and start tearing it down to see if its worth it to swap blocks.


CSNOW is correct. about 95% of the people use use the union bolt from the IS300 to use for an oil feed line. have to run a longer feed line instead of tapping it just below the exhaust manifold but it does work.

[Jostar]

They are definitely different pistons, but the same rods. The pistons are made of the same material/process at the GTE(so they're strong); that may be along the lines of what you read.



Ok, Probably that is it, I know that there is a Sc300 with 900 hp on a stock n/a block & head....

[hottscennessey]

Yup, sure is.

I'm just shy of 600 on my NA-T, and shooting for more. It's a wonderful platform IMHO.

[Satan]

Wow... lots of great info.... headed to that other webiste now.

I figured that I'd swap the internals and everything else I could. I am almost sure that the TT block I have is cracked somewhere. Replace the bearings, piston ring, and any other "worn" components and I should be good-to-go for another 100K.

[The Reaper]

well good luck Satan......now go back to hell where you belong!!!! sorry been waiting awhile to say that to you.... ;)

[suprastanger507mgte]

Well, I swapped my 1jz bottom end and am using the 2JZ NA block for the 1.5. Just used the MKIV head gasket as it is definitly 4 layers thicker than the stock NA ( single layer ) gasket.
I did not boither about the oil squirters - going by what I read on ClubNA-t . Currently I am doing 1.5 JZ, but in the future plans I will convert to full 2JZ with everything else being the same.
I am running a sandwich plate between my oil filter housing to supply the oil to the turbos.

[Satan]

well good luck Satan......now go back to hell where you belong!!!! sorry been waiting awhile to say that to you.... ;)

Thats funny... from my biggest supplier ;-) :icon_evil

[The Reaper]

Well, I swapped my 1jz bottom end and am using the 2JZ NA block for the 1.5. Just used the MKIV head gasket as it is definitly 4 layers thicker than the stock NA ( single layer ) gasket.
I did not boither about the oil squirters - going by what I read on ClubNA-t . Currently I am doing 1.5 JZ, but in the future plans I will convert to full 2JZ with everything else being the same.
I am running a sandwich plate between my oil filter housing to supply the oil to the turbos.

yea i think the stock 2JZGTE HG makes it 9:1

the sandwich plate is a pretty smart idea as well.

how long of an oil feed line do you need to make it reach the turbo?

[pimptrizkit]

i am pretty sure a 2mm head gasket brings it to 8.5:1..


WITH AN 87MM BORE HEAD GASKET, THE HEAD GASKET THICKNESSESS (IN INCHES) BELOW WILL YIELD THE FOLLOWING COMPRESSION RATIOS:

.228mm/.009" = 10:1 (approximate stock HG thickness)

2mm/.079" HG = 8.57:1

3mm/0.118" HG = 7.94:1

http://www.clubna-t.com/forums/showthread.php?t=3088

[suprastanger507mgte]

yea i think the stock 2JZGTE HG makes it 9:1

the sandwich plate is a pretty smart idea as well.

how long of an oil feed line do you need to make it reach the turbo?

Im running stock 1jz twins as a start.
I am cutting off the stock oil feed lines and welding on a fitting on it, somthing that can take a -4 I think. About 3.5 feet of oil feed with a "Y" and two short pieces should be enough.

[The Reaper]

ahhhhh i see what you are doing now.

Pimprizkit: solid info. thanks for posting.

[SupraStardom]

does it matter what 2jzge block it is? is there a certain year and car type to shoot for? i saw that lexus 2jzge are cheap.

[The Reaper]

Lexus SC300 is the block im using.

i dunno about the IS300 blocks. they are VVTi so i dunno if they are different or not

[hottscennessey]

You want non-vvti. VVTI 2JZGE's are weak..

[The Reaper]

ahhh yea good point scott.

[Satan]

...just an update. The US GE block has a large port/opening for the oil Pressure switch, which is on the block, by where the A/C compressor is. A power steering union bolt's thread fit, but it's too long and has it's holes as well.

The smaller threaded one for the JDM GTE block would not fit. Since I am not using that switch/signal, I plugged that port, using the top half of one of my old 7M water temp senders. It's not ideal, but I simply could not find a large enough metric/NPT bolt/plug to fit (local auto parts, Home Depot, etc).

Other than some of the other reported info, the blocks are the same. As far as VVTi & non-VVTi options, just use a TT head (or do the NA-T if you already have an N/A setup that you can use). Also, I would recommend using TT pistons and not a thick-@$$ headgasket.

I have everything in now and will be starting it up tonight. The only thing I am worried about, is that I was unable to test the oil filter bracket for leaks. A long time ago (4+ years ago), someone had similar issues and found that the bracket was the culprit (mixing coolant & oil). I have not found ANY info on this, so if you know anything, please tell me.

So... I am crossing my fingers. At worst, I'll just need to replace the bracket.