whats the difference between a 1jz 3L and a 2jz 3L block? someone tell me the difference please?
1JZ>1.5JZ<2JZ Discussion
- Thread starter OneJoeZee
- Start date
A 1.5JZ is a 1JZ period. The stamp on the block doesn't mean shit. All the 1JZ electronics (IE HEAD) are on the motor, so it's a 1JZ. If you somehow put a 2JZ head on a 1JZ block, it'd be a 2JZ as the heart and soul (ECU) would be from the 2JZ to make all the electronics work.
tissimo said:
The 1JZ would have to accomplish it without the benifit of the higher deck height of the 2JZ. You'd have a less desirable rod:stroke ratio and lose a little high rpm ability.
Since the displacement can't be added through boring the block alone, you'd have to stroke the crank and shorten the rods. A 2JZ simply has a stroked crank, but the rod to stroke ratio wasn't changed much because it has a taller block to allow for more piston travel.
Somebody help me ot here> What is the difference between 1J rods and 2J rods?
Collin
You're making a custom kit so you can minipulate the rod stroke ratio more to your favorgot_boosted said:
rod/stroke doesn't make that much of a difference anyways.
Last edited:
In the world of engines, the block has always denoted what engine it was. When the V8 guys swapped heads the engine didn't become what ever the heads were off of. It remained whatever the engine block was with different heads. All you doing is attaching a head with different electronics to a 2JZ block. It is still a 2JZ engine. Electronics does not an engine make. Neither does a head. An engine is classified and identified by its stroke vs bore measurements. And the 1.5JZ still has the stroke and bore of a 2JZ. The stroker 2JZ are called that because they started with a standered 2JZ block and modified it, hence the stroker classification. the 1.5JZ did not start off with a 1JZ block and modify it, it started with a 2JZ. In reality there is 1JZ engine and a 2JZ engine, the 1.5JZ is just a made up name that stuck. You either modify a 1JZ or you modify a 2JZ.
v8s are usually classified with engine size. But they're all in the same class, SBC or SBF or whatever.. if toyota engines were classified with size I would agree completely.
With a stroker 3sgte you use a 5sfe block & crank, but its not a 5s
It seems more of 7m guys crying over it for some reason.. Just like not allowing 2js to compete with 1js and 7ms.. it seems they want a handycap or something.. I'm not really talking about duane's site, but more of competitions at supra meets and what not. I've but just as much time work and money into my car as others have, so what I have a 2jz, are you scared? hell duane and kwnate are running 800+ on their 7ms, is a jzs 800whp better then a 7ms 800whp? This is why I would like to clear this up.
With a stroker 3sgte you use a 5sfe block & crank, but its not a 5s
It seems more of 7m guys crying over it for some reason.. Just like not allowing 2js to compete with 1js and 7ms.. it seems they want a handycap or something.. I'm not really talking about duane's site, but more of competitions at supra meets and what not. I've but just as much time work and money into my car as others have, so what I have a 2jz, are you scared? hell duane and kwnate are running 800+ on their 7ms, is a jzs 800whp better then a 7ms 800whp? This is why I would like to clear this up.
yeah engine size ok...LS1 LS2 LS3 LS6 LS7
And I'm not sure where being scared has anything to do with anything. I could care less if its 7m or 2jz or what ever I'm just telling you the way engine classification has been done.
And I'm not sure where being scared has anything to do with anything. I could care less if its 7m or 2jz or what ever I'm just telling you the way engine classification has been done.
JustAnotherVictim
Supramania Contributor
Tissimo, after doing a little reading I noticed that when the 5sfe guys turbo their motors they throw the 3sgte head on their block but they don't call it a stroked 3sgte, it is still a 5S, a 5SGTE. Seems to just be a little quirk the 3S guys have.
ah, i forgot about the lsx series. I'm not familiar with those, but i assume since you said it you can swap ls7 heads on a ls1?
interesting, when I was looking at mr2/ alltracs I never saw it called a 5sgte
interesting, when I was looking at mr2/ alltracs I never saw it called a 5sgte
Nope, won't work on a LS1 but is possible on a LS2 which is a pretty good leap. That's like fitting a 7M head on a 2M. It's quite the generational leap.
Ah, yea, I looked it up and they cant work on the small bore blocksDirgle said:
I guess i'm defeated..... :cry: I'll still consider it a 1j though.
Dirgle said:
Most of the head swapping going on with v-8's were on carb'd setups, where the electronics in the car very few and far between as far as stuff connected to the actual motor. Back in the days anyways...
jz electronics are interchangeable.. so techincally you can swap a 2jz head on my 1.5jz easy (even though the intake and exhaust bolt patterns are different and will need new manifolds)
I guess i can just say I have 2 2jz mkiiis now
I guess i can just say I have 2 2jz mkiiis now
tissimo said:jz electronics are interchangeable.. so techincally you can swap a 2jz head on my 1.5jz easy (even though the intake and exhaust bolt patterns are different and will need new manifolds)
I guess i can just say I have 2 2jz mkiiis now
Retrofit the valve covers and no one will be the wiser. :biglaugh:
starscream5000 said:
True to a point, no matter what electronic method you use, you are still achieving the same ends. You have electronics that meter air, calculate and initiate ignition timing events, and you have electronics that meter and inject fuel. In the end even if the components are different the end result is the same. An oil pressure sending unit is still a sending unit regardless if it's threaded for one block or another. The JDM 2JZ uses different electronics from its USDM counter part. Does that make it a different engine? I'm just telling you the tried and true way engines have been classified in the past. It's works good, even today. I'm not against using a new metric. But classifying an engine based solely on electronics or what head it uses, has the potential to get out of hand pretty fast. Should we say Duane no longer has a 7M because he now uses different electronics or has a head that no longer resembles a 7M head?