difference between all of the japanese 2.0 turbo engines?

[S13squirrel]

Okay so I am wondering what the technical differences are between the 2.0 litre turbo engines from the major japanese auto manufacturers, since it seems to be a common setup. In particular, I am thinking Nissan SR20DET, Mitsu 4G63, Toyota 3SGTE, and Subaru EW20 (I think that's right). I am not just asking about which ones are "sweet" and your favorites, I am wondering what actually the technical internals are like for each one. Do they all have under-piston oil squirters? The toyota engine supposedly has a lot of research and racing heritage behind it (ala Castrol Tom's Supra, even though that engine never came in a production Supra), but it is really that much more solid of an engine than the others? Which ones are known for being able to handle more boost on stock internals?

[pruto]

i think the 3sgte is an iron block, don't quote me.

they all rock =)

[OptionZero]

I think they use different amounts of various materials: iron v aluminum- also, I would imagine, injector size, the exact ratio of piston size to rod length (undersquare or oversquare?), the exact displacements are different (2.0 is a round number, but they're off by cc's), the way they use variable timing in newer variants, etc. I'm no expert, because I don't have a 2.0 turbo (good ol' 2.4L here =P)

They all have racing heritage: 4G63 and EJ20 (subie) are rally cars that have to take the abuse of offroad, and the 3SGTE and SR20DET have JGTC history.

[raging panda]

well the ej20 is harder to put into that group because its a boxer engine, its kinda special, but a good engine still.

The I4 engines are all over 10 years old now, so they all have some great heritage and technology and research put into them, and they all have evolved over time. The SR started w/o variable valve stuff, then later had it with the s14 and the s15 improved even more. The 3sgte was in the 2nd gen mr2 and was last in the altezza as an N/A engine, still producing some good power (180hp i think, could be around 200) and also has vvti i believe. The 4g63 has always been a good engine, although the first ones in the states had some crankwalk problems in the dsms, but not sure if the early evos had that problem. Right now its making the most stock hp out of a 4 cyl production engine that i can think of (287? or something), but its late so maybe theres another....the last sr20 put out 250, and the 2nd gen mr2 had like 220? Good numbers for small engines, all 110 hp per liter or more.

The EJ20 is a good engine, but we didn't see much of it here. Early on there were some 2.2L turbo legacys but then we didnt get a regular turbo subaru until the wrx in 03. Thats not even the good version, but we didnt get that either, the sti in japan is still the ej20 if i remember right, we got the 2.5 ltr engine, which is no slouch, and actually is great because of its low end torque, but not a 2 liter like you are asking about.

The boost thing is kind of depending on who you are talking about. The 4g63 i think takes the most boost as a ton of dsm guys run a ton of boost on their engines all day, but i cant say since thats the only real production turbo car we got in mass quantities. That means that there are a ton to go around so people dont mind blowing them up because its easy to replace. not the case with the mr2. the mr2 was in low production, and you dont see a ton of guys modding them like crazy, so i cant say what kind of boost it could handle. The sr20 has taken around 500 hp of boost, im assuming 25+ psi, on a stock engine, i think it was enjuku, or some southern tuner, so it can take a lot of boost. but this is all dependant on your tuning and what you can use to control fuel. When you play with those boost levels, you have to have some pretty big injectors and a turbo, and safc usually doesnt cut it up there, so a standalone is almost necessary, so its really not fair to say that its stock anymore. The KA has seen 400+ hp with 20+psi of boost stock internals, i just thought i would throw that in there. aem standalone was used.

just so you know, the supra never ran its own engine in jgtc, it ran the 3sgte and it now runs the v8 found in the lexuses. (someone chime in if im way off base here.)

sorry, late, lots of run on sentances, and possibly wrong info, please feel free to correct anything you see thats wrong.

[pruto]

mmm, corrections

1) i'm pretty sure the altezza came with a 2.0 liter turbo, not sure which one.

2) the sr20vet makes 280 hp in that nissan monster truck (don't remember what the name of it was called, i believe that was the highest output of a factory sr. the 270r's sr made 270hp.

3) i believe the supra did use the 2jz but later switched to the 3sgte for better weight distribution, i'm pretty sure supras in jgtc didn't start off using the mr2 engine. just like the last skyline was using the vg but did use the rb26 before that.

if you really want to know all the internal data, i'm sure google holds all that info =)
i have a soft spot for the 3sgte mainly because i've always wanted a sw20, i've heard of japanese guys getting 700-800 out of it, and it was making 500hp reliably in the supra jgtc cars.

[thewhitewrx]

i think that of all the 2.0L motors the 4g63 turned out to be the best. its stout and well built, and takes so much better to mods. take it from someone who owns and SR and an EJ, the 4G takes the cake, in a nut shell (except for 2g dsms)

btw, they 2.oL sti engine ( ej207 is great, butyou cant get that much power of of it, the 2.5 howevre has more displacement obviously so it is easier to mod)

[raging panda]

well im pretty sure the 3sge in the altezza is N/A and makes 210hp with vvt. They call it the beams engine or something. I'm not aware of the history of the jgtc, all i know is that ive known about it for about 3 years, and the first 2 they were using the 3sgte, and now they use a 1ufe or whatever the v8 code is.

i dont know if you would call the jgtc engines reliable, they were probably rebuilt after races and is modified beyond anything the average person could do. Not to say they arent a good engine, just using a race car as a comparison probably isnt a good idea. Thats like saying the 4age made 240hp for formula atlantic, so you can too.

At the highest levels, all of these engines will compete with each other. I've seen 800hp evos in options mag, ive seen 800hp sr20 all over the net and in some import mags, and im sure there are a few 3sgte engines making 800hp no problem, but like i said there aren't as many of those around compared to the sr20 or the 4g63 in the US. If you know what you are doing you can make a ton of hp out of any of these engines.

[OptionZero]

there were Celica GT4's, which used the 3sGTE turbo w/ AWD...so it wasn't just the MR2 that got the 2.0L turbo

There's probably stuff like ECU accessibility/adaptbility that plays into that i'm not qualified to talk about

[MakotoS13]

wow, this thread is easily one of "the threads that should not have been".

[S13squirrel]

well I was just wondering if any of the manufacturers had significant technological advances over one another... just because you aren't learning anything (or don't have anything to contribute) doesn't mean the rest of us aren't. Have some patience with ignorance.

[davenavarro1]

im no expert at anything but i think the japanese figure out the balance of weight and horsepower. consider that the gas prices there are like gold there, this 2 litre cars can be a daily driver with great mileage (depends) but can still be a weekend warrior.

of course im no expert at anything and this is just my rusty two cents