2jz Miata build thread
 

I ran into this while searching for a car. Is extremely interesting how easy the 2jz fits right in with little hassle.

requires registration. link removed.

wow!! all I can say.

It for tire-spin.

That's bad ass...

a 1k whp miata will take you back............................to the future!

Can't wait to see this thing on youtube :drool:

why would you want to go through all the trouble lining up, fabricating, etc...when it's much easier to just build a 2.0 miata motor to make any amount of power you want (depending on how deep your pockets are)...

After a going north of 120mph several times in my car...they're in serious need of a healthy dose of "clean" aero.

yeah, without an oil pan...

:loser:

Just to say you can. I would.
And for the record I'm pretty sure a 2JZ will destroy a BP with much less money.

What's a bone stock 2JZ run you? Plus the value of the time to get it in there ND RUNNING WELL..? VS the same amount put into a BP which is already in the car. I'll stick with my BPs (unless you wanna talk about LS1's :giggle:)

It shouldnt really be hard to get it running once its in, and you can make like 600hp on the stock engine... then if you build it...

its just ridiculous, lol

Not that anyone really wants to run 1000 whp in a Miata but...
How many BP's get to 1000 hp? Apparently the new record is the Greek guy with 800...
How many 2JZ's do you see with north of 1000 whp? Not every day, but I've seen quite a few in magazines/forums/etc.

If I had deep pockets, I'd go with the 2JZ, just for shits and giggles.

^^^ And what he said, 2JZ's are already really damn strong in stock form.

That being said, I just remembered how front heavy supras are, now imagine that engne in a miata, its going to handlelike total shit, itll be worse than a SBF

Yea, I was thinking exactly that, but we were talking strictly about power output. And if you need the power that a 2JZ is going to give you, I don't think you give a flying fuck about handling.

Awesome. Notice that all he needed to mount the motor was custom motor mounts. No k-member modifications if I understood his post correctly. Fab a rear mount for the trans, a mount for the diff end of the PPF, make a custom driveshaft, done. All of that is relatively easy.

I wonder how well the shifter turret lines up with the stock hole?

^^ yeah all he mentions is fabricating custom mounts and voila!!

I dont think the person behind this built has handling in mind. This car looks like a drag whore

jesus, that thing will be a beast

FM 2.0 stroker, $7200-$10k depending if you build it or have them do it

Stock 2jz capable of that same 600hp, $3k with tranny

you do the math genius!

I would not think the weight distribution would be thrown off too much at all. The engine from the pictures does not appear to be grossly forward in the engine bay.

Its heavy as shit from what I understand

The #'s I found..feel free to correct me if you find something that says otherwise. 2JZ-GTE + 6 speed trans = 750 pounds dry. Whats a BP weight with trans?

Engine and tranny are 450 lbs according to a random thread I found on M.net

Thought 750 seemed a little much but what I found said motor was 595 with tranny put it at 750. Ill keep looking.

Information i have found confirmed this.

Are we talking about the 2JZ or the BP?

I was reading 450-500lbs for the BP with tranny, but the resluts were varying. There's so much damn misinformation

We (at-least I) were/was talking about the 2JZ.

I believe the obvious is the 2jz.

as soon as i saw this i was like :cjerk:. i've wanted to do this for a while now. i'm actually a member on supraforums cus i'm trying to learn more about the 2jz. about the weight: wouldn't it be the same as doing a v8 swap? just beef up the brakes, springs, struts, and swaybars and it should handle pretty good right?:dunno:

It depends on your definition of good handling

With 300 extra pounds on the front wheels it would handle like total crap compared to stock, but probably still better than most cars, haha

I remember when I did an engine swap on my car, I had the BP and trans together...I really don't see that thing weighing 500 pounds...
I guess the scale doesn't lie.

i mean people swap big v8's in miatas and get good times on road racing courses so it cant be all that different can it?

LS1 = 390lbs. :fawk:

It's cool, I'd drool if I saw it in person and beg for a ride, but...

...unless it's going to be north of 500 hp with the traction to plant it it's pointless. An SR weighs a lot less. Flamesuit on.

at least you didn't say an RB swap....

Actually; I've seen more than 1 with over 900 hp down here (not in a Miata though).

the Supras are very popular here. More than 3 doing low 10s at the local dragstrip


Curious about the weight. I'll check with my local mechanic tomorrow.

Hi i would like to start out by saying the car you guys are seeing on supra forums is mine. This is a 92 miata that i have had for 5 years now. This is a 95 supra NA motor with a turbo and were going to push about 12psi. The motor with this setup put out 315hp 275 tq at only 9psi. this should be fun:)

the 2jz with all the acc. shed off and a w58 trans weighs only 100lbs more than a fully dressed BP.

Also i thought you all would want to know that this is not an expensive build due to the fact that i got the running motor for $100 and the trans clutch and fly wheel for $400. It is going to run a supra computer for the engine and the miata computer for the body. the shifter location is only and inch forward of the stock miata location but i think i can deal with that. This is all being done in a garage in the little old town of Mt. Airy MD with a bunch of 24 year old guys who have to much time on their hands if you have any more questions please feel free to ask.

and if any one was wondering it should handle ok still and all i want to do is make 50 year old guys with their 03 corvettes and 20 year old girlfreinds cry everyday.

Very cool, I cant wait to see it completed. I think Ive pretty much decided that I am going to do this one day, haha

Cool, thanks for dropping in, no pun intended. An inch forward on the shifter is not bad at all. That could always be corrected with an offset shifter if one wanted to do that.

So are you using the Miata diff and halfshafts? At the power levels you are taking about that is completely doable as long as the trans is not ridiculously short geared (torque loading).

i am using the stock rear for now but that is only temporary i plane on doing a RX TTII rear swap in the spring first thing is to get the car together and running

by the way i have a freshly rebuilt BP if anyone is looking for one it has almost everything powdercoated and it is ready to go. 800 obo.

Nice very cool you should start a Built Thread over here so we can drool over your project. Also maybe you could let us in your secret mounts set up, then we might see more 2jz miatas :giggle:

+1 on the 50+ year-olds with 20 year-old gfs. I see them on a daily basis over here in Miami. It will be cool to deflate their egos


Edit: post your engine in the for sale section with pictures

Im curious how much room there is for the radiator, I wonder if youre gonna have to run the fans as pushers

http://i31.photobucket.com/albums/c3...iatasmalls.jpg
http://i31.photobucket.com/albums/c3...0/miata2jz.jpg

here are some new pics that aren't on the net yet so you guys no i am actually the guy with the car.

the only cutting on the whole car is the little bit of core support you see in the front and a little trimming on the passenger side frame rail but not even enough to mess with the structure were talking like a 1/16 of an inch.

there is a little room for the radiator and intercooler but its gonna be tight i am going to run a pusher fan with a civic half core radiator but its a 3 core and we should be ok.

FWIW I easily fit a low-profile 16" pusher fan on my LS1 radiator, also on a NA body. The front of the radiator is pretty close to being in the stock position. I had to remove the hood latch to get the oil cooler in front of the radiator. An intercooler may be a tight squeeze if it is a big one. It might be easier to fit a big WI tank?

Holy shit that doesnt look bad at all O_O

the only problem i see that i have already come to terms with is that the motor dose stick out of the hood a lil bit but i have a freind that is a body guy that is going to trim the hood around the motor like a body dropped mini truck

Really nice work Sean.

I'd like to see how well the hood fits. (By your own post; you beat me to it).

I may even follow your path in a few months.

My local mechanic is rocking one of those motors in his own car right now and he's done a bunch of those for different local cars.

I've heard him say those are bulletproof engines.

Please keep us updated on your project.

BTW; welcome aboard!

I can't wait to see more pics and videos of this car!

Are you basing this on fact or just pulling it out of your ass?

There are lots of 5.0 Miatas and they still handle very well. Plenty of on track video to back it up. That's with another 200 up front.

If I didn't think that it would handle, I wouldn't be building one.

Sean, you might want to look into using a Ford 7.5 or 8.8" rear. I just confirmed today that the Factory Five Racing axles with an 8.8" ford will end up being the same compressed lengths of the half shafts as a Miata. Diffs from a V8 Thunderbird are $100 and the axles are $110 each side from FFR. Here are my two diffs. I just put them together today for a comparison. Both come out to 53" where the big end stops and the splined part of the axle starts. The other big advantage is you don't have to worry about a PPF.

Attachment 202180

Little diff

and Rusty trombone diff

That ford rear end looks heavy.

300lbs extra pounds, slightly forward of the stock engines center of gravity is definitely going to have negative effects on the handling. Theres no denying that.
More weight + Higher front spring rate (needed for said weight) + Stiffer front sway bar (to prevent roll from said weight) = More understeer

and no, Im not just being an internet expert, I do have real road racing experience. Ive never road raced a miata, but the basic principles of chassis engineering are applicable to all cars.

That being said, even with the negative effects on the handling, there is no reason why it couldnt be fast on the track, especially with all that power. It would just have more tendancy for corner entry understeer than a miata with a lighter engine in it. As much as people want to deny it, a lot of race cars are fast because they are powerful

So sean, do you have to have a custom drive shaft made so that it will be the right length and connect to a miata diff and supra tranny?

And all you have to do is add more rear spring and rear anti-sway bar to bring it back to neutral.

yes, thats true. You could neutralize the corner entry understeer that way. Its still going to be 300 lbs heavier though

Im not trying to belittle the swap, like i said, there is no reason why it couldnt be fast on the track, but if I were building a dedicated track car I couldnt want to go this route.

For a fast street car that still handles better than most cars I think its pretty great

definitely in for updates on this one all of my friends have 2jz's and its pissing me off