7mgte swap vs 1jz swap
 

Just a simple thought. My goal is 350hp. I have a 7m N/A engine right now. I can get a 7mgte for $2100 with the man. transmission and all the wiring etc. I also have the choice for a 1jz twin turbo with man. transmission and all the wiring etc. for $2000.

Obviously it would take less mods if I went with the 1jz. However would I still be able to keep the air conditioning? Among any other things that one might like to keep his/her car a daily driver.

Also, I would like to know about how much if any mods are needed for the 1jz swap. I know there are some mods but if someone could throw some type of "MEASUREMENTS" in time or (easy,medium,hard) level of mods. I will be having it professionally done so I am not to worried but am wondering if the money it would take to do 1jz swap including the engine and man tran price will come out to be equal to or better than doing a 7mgte swap and then modding it.

I mean doing the 1jz swap puts me right into 280hp. That's not a far cry from 350hp. I could do the normal mods after that such as exhaust system, intake, etc.. Thus saving me some money due to less over all mods.

Yes I understand parts for the motor are harder to get or more expensive.

Someone help me out here with my logic... Please try not to ref. me to another thread unless it has a simple direct answer to my question.

i have a 7mgte as of now and to be honest its not a power house im looking into a 1jz swap motor is more reliable and easier to mod may have a little more money involved but from stuff i have read building a 7mgte is more less building a bomb

boosted88mkIII - You haven't even done a swap yet... Come on... get down off the soap box.




Supra Saiyan - There are plenty of benefits and pitfalls to both scenarios. If 350 is your goal I'd stick with the 7M-GTE, source one cheap (NOT JDM) and rebuild it just up to stock specs with a MHG and perhaps forged pistons for longevity. Then proceed as usual. It's going to cost MUCH less and your W58 transmission should be bale to hold up for a few years too unless your drag racing (it's lighter and shifts better than the R154). Do NOT buy ANY used engine from any where and expect to just run it free of trouble. Yes, the 1JZ is more reliable, but the 7M's manage to make it over fifteen to twenty years in many cases before the head gasket blew even at the low torque spec... It's not a crap engine... It's a decent engine with shit DIY garage mechanics working on them. The JZs are easier to get more power out of but if you're looking for around 350 it's not worth the effort in my opinion. In both cases you should do a rebuild, then you've got to swap in electronics (the 7M-GTE's just happen to actually FIT), then you need to make some upgrades and then some tuning.

is it even possible to find a non jdm 1jz? im ready for a rebuild and been toying with the idea for a few years now.

You're not going to find one from anywhere in North, Central or South America... I know they're more common in some other countries but those could all be grey market vehicles initially brought in from Japan as well.... Either way the point still stands: Used = Used. But JDM often = used AND sitting in a rainy, open lot or shipping dock for god know how long. Never drop anything straight in...

personally i would stick with the 7m, cheaper, find parts easier and its a all around good engine. yes the 1jz can make power easier, but like cre said, ur gonna need to rebuild it, and u might not even find the right part unless u fork out lots of $$. With the 7m, u can easily reach 350whp. Its not to hard, and if u rebuild it, parts will be cheaper and easier to find. Stupid mechanics just dont know how to work on 7m's, once u find one who does (or u learn urself) than ur golden.

It's not just stupid mechanics... It's the ignorant young guys who don't stop to think that a head, block deck and crank THAT long need to be PERFECT. Who don't realize that that light pitting is a killer. Who flat out fail to consider that it's an OLD engine. Hell they don't even have hypereutectic alloy pistons... many builders expect that as the most basic engine at least have that (the 1JZ does). Then there are the cheap owners who THINK they bought a cool car that was a complete bargain. Age isn't a friend of any of these engines nor is the fact that for a decade now they've been so affordable and over-glorified that 90% have been bought up and trashed by stupid little kids. Stupid little kiddies will trash just about anything but these are a favorite because they're often cheaper to find (not keep running or repair though) and it's not the same Honda that all of their friends are driving around and trashing. Finally, there's the fact that the car itself just wasn't that robust. It was Toyota's car for the weekend driver and a showcase for the latest and greatest technology... unfortunately half of the materials they used were later found to age horribly... of course this goes for many 80's cars from many manufacturers.


Shall I continue ranting? It's been about 15 minutes since I've had a good venting.

well some of wat ur saying cre is right but alot of it isnt lol but rant if u want, idc lol im only 22, bought my supra and fixed it up, replaced the hg with a friend and havnt had to touch it since. But then again, my supra is almost mint so maybe i got lucky, or maybe its because i take care of it so well lol but yes they MAY be cheaper....but thats if u can find one.

Just wanted to add, not that I like my 7m, I honestly hate it. However im running 200,XXX on original head gasket. My car is a 86.5, just saying.

i assume its stock?

Nope, you got part of my point... I think... you're communications skills really blow half the time (but at least it's only HALF the time).

The 7M is a DECENT engine. MOST have been beat to shit. The GTE 7M can make 400hp with less work than swapping in a 1JZ and modifying it. As they are both over two decades old, you're an idiot if you EXPECT either to be reliable. Total cost for a RELIABLE 400hp the 7M wins.

NEVER plan on being the exception to the rule! If you get lucky, awesome... it probably won't happen again so live it up.

there is alot of support for both engines out there.
your gona be fing around just trying to get a stock 1j in there so just go with the 7mgte. whats the price of the swap?? a msd tach adapter and a oil filter re-location??

can't you get a usdm 1j from a lexus parts car??

I'm sorry, we have two different threads going on about 1JZ-GTE vs 7M-GTE swaps going on right now and I missed some info pertaining to this specific thread.

1) I didn't realize this was a swap from a 7M-GE. Add a stronger fuel pump and oil cooling system.

2) Don't forget that you'll have to swap out the front subframe if your car is pre89.

3) With a $100 difference between the two I would personally go with the 1JZ. If the 7M were a few hundred less I wouldn't hesitate about going that route.

4) Parts are not as difficult to get as many seem to think. Those which aren't normally available can be sourced via certain shops such as DriftMotion or Canadian Toyota dealerships can order them (if your dealership claims they can't ;) ).

You are setting your self up for more work with the 1JZ but not a ton given that it's a swap from a 7M-GE.

I still feel you should rebuild what ever you do go with.

yup like i said up above........u can find the 1jz parts, but there going to cost u a fortune..and ive always been lucky cre, but jeez bash all u want on my communications skills (i personally think there fine) but at least i don't come across a self righteous dick...ANYWHO..



I guess long story short, if ur worried about money, go 7m. 7m is a good motor if treated properly, as its down falls but wat motor doesnt.

If your not worried about money, go 1jz. Sturdy motor, parts are going to be more expensive and harder to find believe it or not (u cant just simply go to autozone for something so simple) and u most likely will be able to build more power with it, if that is wat ur final goal is.

Driftnotion makes the motor mounts that drop the jz into the pre 89 subframe. So if that's a worry you have they have the solution

They're, not there. They are fine = They're fine. I really only mentioned it that time because I couldn't understand what you were trying to communicate and I usually don't have that problem with your posts. I was hoping you might put a little more effort into communicating with the rest of us in order to avoid confusion. I'm also well aware that we have a number of people who don't speak English or it's not their native language and it can be frustrating at times.. If that's the case, I'm sorry. I got spiky I'll try to ask for clarification in the future with a more gracious demeanor.


Yep... This here self righteous, red-necked dickhead got through school too. ;) I don't deny being a dick sometimes... Almost everyone's here for a free handout, don't do any of this for a living, have seldom done more than changed their own oil (and half of them fuck that up and crush the oil pan weep), think the alternator is a turbo (yup, it's happened) but they are all more than happy to argue about everything and almost never contribute anything more than a superiority complex thereafter. But at least I can throw them out after the novelty wears off. It's good to be the King. :grinking: (Well, I suppose it's more "Roman Senator" as there are a few of us and our seldom seen but well revered Caesar who is away conquering distant lands.) I don't think think I know everything though... I am very opinionated, but I know many people far better educated than I and, quite frankly, I am envious of them from time to time. Regardless, the point stands that I spend so much time on here that it might as well be a second job, just because for some weird reason I don't want to imagine a thousand MKIIIs stuck on the side of their road while their teenage owners try pouring oil in the radiator because the think it's the "oil reservoir" (YUP, seen that too). So, if I get a bit punchy, call you on something I think is a problem or incorrect or just rub you the wrong way well... Feel free to speak up but don't be surprised when I don't send flowers.



Back to our regularly scheduled program:
You will have a hard time finding 2JZ parts at AutoZone too... Which is a shame as a large number of the parts which need periodic replacement on the 1JZ and 2JZ are interchangeable. ;) Anything else CAN be ordered through any Toyota dealer... Whether they're willing to or know how is the question. If you're completely rebuilding any Supra engine I should hope you're not buying anything more than RTV, belts, assembly lube, exhaust and intake gaskets from AutoZone (they do carry all of those for the 1 & 2JZ, just give them the 2JZ part number). The only parts that appear really hard to come by without paying a lot are new OEM turbos, factory exhaust manifold and intake manifold and head (guess what.... the 2JZ head fits the 1JZ and then you're open to a whole new world of goodies: intakes and headers and turbos and cams Oh My! :D ). They are more expensive and yes, for the initial rebuild parts will have to be ordered (I had to order parts for both of the last two 7M's I rebuilt) but once that's all said and done, no, most of the parts you'll ever need are NOT that hard to come by.