Hey guys, i just got a 1991 supra. it is a five speed manual.
i have a few questions, first what kind of FI is the motor? second Are there any aftermarket intake manifolds or heads for my car? And is there a turbo kit made for my car?
any help would be appreciated.
thanks
Tyler

Hey there and welcome to I-Supra! OK your first question, I hope I understand this correctly but it is sort of general. The Supra is electronic fuel injected. Even the Mark II Supra was ahead of its time and used the same. Ok the Manifold.. hmm I dont really suggest this unless you have the turbo. There is a different manifold for our car, it is fabricated by a guy on this site I believe. He makes them based on need. It looks alot like the one from a 1JZ/2JZ. It is meant to replace the old one with some adjustments of course. Your question about the head, please be a little more specific. Do you mean like the top of the motor head, where the valve covers are? No there are no true turbo kits for the N/A model. What I mean by "true" is that a company actually produces one for the N/A Mk III supra. If you had the Mk IV then that would be different. You can, however as an option swap the motor or N/A-T it. Since seeing you have a 91 Supa, you have a wide variety of options open to you, its really how deep your pockets and imagination are! If I had a '91 Supra I would so do the swap to the 2JZ-GTE! Its a bit pricey, but damn the car would be fast as hell!

the N/A-T its bin a long time since i have heard someone do that.its more expensive then the swap but you get more hp from the same turbo that comes on the GTE. but like supra88t_Knight said its how deep your pockets are and also how long you want it to take.

Hey MadSupra5 is it the 89-91 Supra that has the crossmember for the 1JZ right? If so then have you thought about dropping the 2JZ with the 1JZ Bell housing and R154 tranny?

well the thing is(this is what i have heard no personal experience)the 2jz will not fit the mk3 body it hits the back fire wall, you can use the block but not thew head thats why most just use the 1jz.

Hmm no the actual "Long block" will fit in your car, just not with the Getrag 6 sp tranny. I have a friend who did that swap, used the bottom block with from the 2JZ and put the head of the 1JZ on it. He said that the 1JZ head gets better compression thats why he did it. Whether its true or not I dont know. But someone on this site does know, thats for sure. Actually have been curious about one thing, what is the bell housing exactly? Cause you need the 1JZ bell housing if you want your tranny to bolt up to the 2JZ motor.

the bell housing is that thing that bolts to the block and covers the clutch assembly, its on the transmission and it looks like a bowl. sorry not good at describing it. but tell me something supra88_knight why does it seem like me and you are the only ones on this forum

LOL.. I dont think we are the only ones on here MadSupra. It just seems like it. Honestly I have too much time on my hands during the weekend. Because I live in Korea. As for the bell housing, I got ya, dont worry I have seen many a transmission before and seen the whole thing connected to the motor and out of the car so I dont have a problem understanding what your saying.

Damn... lots of bad info in this thread, too.

Alright Shaeff, I know you know more than me, but man if your going to say bad info on the thread at least correct the guy whos wrong, would appreciate to know.

Yeah, I was going to get there. It's just disheartening to see, that's all. Especially since all the information most people would want is out there, and all you have to do is search.

1) No "heads", it's an inline 6, which means ONE head.

2) The custom FFIM's you speak of are likely those being produced by Ron R. (jt2ma71) on supramania.

3) The year of the MKIII doesn't limit you to options for power/motors.

4) N/A->T is performed more than you think. Lots of people like the higher static compression ratio. You're not getting more power from the turbo, you're getting it because the N/A's have higher compression ratios.

5) Putting any jz series motor in any MKIII is possible, '89.5+ crossmembers allow it to be bolted right in, and www.bicperformance.com makes adapters for you pre '89.5 folk.

6) The entire 2jz assembly will fit into the MKIII chassis with a little massaging. That's not why people usually use the 1jz head. They use that because 90% of the time they start with 1jz's and miss the .5L of displacement.

7) No matter how you look at it, the 2jz head is BETTER in every way than the 1jz head, anyone who says differently hasn't seen flow test results, or the various other bits of data floating around the 'net.

I guess that's the end of my 'rant'.

Its all good Shaeff, I didnt get my feelings hurt, just learned alittle more, thats all. Yeah I was wondering about the flow result on that 2JZ with the 1JZ head. Because after all I heard about the 2JZ why would you ever alter the motor? It just sounded bizarre to me, thats all. Is it realy worth the while putting in a 2JZ into our MkIII?

Good outlook.

Well, define "alter". There are plenty of performance upgrades for the 2jz that are plenty worth-while.

As for putting a 2jz in the MA70 chassis, sure, it's worth it. But for the power level that most people want around here, a well built 7M will cost less, and be just as reliable. I'm a huge fan of the 7MGTE.

Hey Shaeff I'm glad you gave a better understanding for the 2JZ to me. What I mean by alter is changing the head, upgrading the internals. I really think that I will stick with a 7M-GTE, I'm happy with what I have! I'm just a humble soldier, trying to make Sgt right now, so when I get more money I might consider the idea. Its pretty expensive to slap the 2JZ in my supra. Oh yeah did you check out that guy who has the coolant leak coming from the underside of his turbo? I have never heard of that before until him, is his turbo busted, or should he pull the turbo out and fully inspect it for damage?

Propbably leaking from the coolant pipes/plate on the turbo and running down the back side...

sweet im gonna have to check out that site www.bicperformance.com cause i really wanna swap my 7m-ge for a 1JZ mines 86.5 supra, question: will my non turbo 5speed tranny bolt up to the 1JZ? or am i gonna need to start shopping for a R154