GT3076R good turbo for the 1jz?

[Spaniard]

Only one would be boring. Might as well keep stock twins.

Not really. I think. The Amuse Supra in japan was running a GT30R turbo on their 2JZ car. The car was built for ultimate response on the track. It did incredible! So with a 1JZ at 2.5L I think a GT28RS would be awesome! Besides, if your not familiar with the disco potato turbo, it is quite the machine. That turbo will have incredible response while being able to flow a shit load. Besides, you'll be able to boost more than the twins and have way more reliability than the stockers while making more power. It would be awesome to have twin GT28RS's but that wouldnt be an ultimate response setup anymore. Gt30r is the largest that should be gone with a good responsive setup. Why do you think drift vehicles with the 1JZ go no larger?

 

[OneJoeZee]

I know what a "disco potato" is. A GT28RS is not a GT30R. A gt30R is capable of ~100hp more than a tiny 28RS.


30R
Turbine
-Wheel: 60mm w/ 84 trim
-Housing: .63 ar, .82 ar, 1.06 ar

Compressor
-Wheel: 76.2mm w/ 56 trim
-Housing: .60 ar

28RS
Turbine
-Wheel: 53.85mm w/ 76 trim
-Housing: .64 or .86 ar

Compressor
-Wheel: 60mm w/ 62 trim
-Housing: .60 ar


Like I already said, if you were to use a turbo that small, you might as well keep stock twins. They already have great response and capable of over 350hp. Spending $2000+ to do what you can do on stock twins sounds pretty lame to me.

 

[tissimo]

28 rs would give responce like stock twins, but yea, only max out at like 320-330whp probably.. a 2871 would be better.. but I think the exhaust would be too restrictive for a high reving 1j... a 3076r would be the best bet imo.. or a gt3040 (gt30 exhaust gt35r compressor) for some more power.. 400whp capable, reliable, spool quick..

 

[OneJoeZee]

I agree.

 

[aphxero]

I've gotten 370whp our of a 28rs on a 2 litre

But yeah whatever.

 

[tlo86]

im actually looking at turbos right now hehe was considering the sp63, the gt35, and the gtk 550 from turbonetics. might go with the gt35 though not sure yet =/

 

[Spaniard]

I know what a "disco potato" is. A GT28RS is not a GT30R. A gt30R is capable of ~100hp more than a tiny 28RS.


30R
Turbine
-Wheel: 60mm w/ 84 trim
-Housing: .63 ar, .82 ar, 1.06 ar

Compressor
-Wheel: 76.2mm w/ 56 trim
-Housing: .60 ar

28R
Turbine
-Wheel: 53.85mm w/ 76 trim
-Housing: .64 or .86 ar

Compressor
-Wheel: 60mm w/ 62 trim
-Housing: .60 ar


Like I already said, if you were to use a turbo that small, you might as well keep stock twins. They already have great response and capable of over 350hp. Spending $2000+ to do what you can do on stock twins sounds pretty lame to me.

You just listed specs for a 28R not RS. Also, you wouldnt get stock twins power. Just no way, physics proves it. Besides like aphxero said, he made that much on a 2.0L? Imagine how much on a 2.5L.

 

[OneJoeZee]

It's a 28RS. That was a typo. Sorry.

It doesn't matter that it was on a 2.0L. A turbo can only flow so much regardless of engine size. The turbo could be on a 4L. Would not matter.

He said he made 370. That can be done on stock twins.

 

[Spaniard]

370 on stock twins? yes. it can be done. i did 405 on them, but how long did that last? not long. reliability at that point is shot, especially if you have cams. I have seen srt-4's use that 28RS and they are 2.4L and they are pulling 415+. i still think it would do better than the twins. when you compare the amuse supra to our situation, the 28rs would be ideal. while the 3L 2jz found the gt-30 ideal, when talking about response. now, i do i agree that a gt-30r would be the best choice, but i'm saying ultimate in response, gt28rs.

 

[porsches4lunch]

GT35R spools up INCREDIBLY fast on small engine and will make power all the way where as the 28 and 30 will run out of breath in the HIGH revs.

 

[Spaniard]

GT35R spools up INCREDIBLY fast on small engine and will make power all the way where as the 28 and 30 will run out of breath in the HIGH revs.

Way to laggy when talking about a 1jz response machine. i would know, i have one. The 30 does fine for the high rev's, i would know, i have one. hehe.

 

[porsches4lunch]

Way to laggy when talking about a 1jz response machine. i would know, i have one. The 30 does fine for the high rev's, i would know, i have one. hehe.

Well, i don't own either however we have SEVERAL customers with 1JZ and 2JZs and 7ms. Several of the customers with 1JZ are running the GT35R and they LOVE the characteristics of it. comments are usually "wow, it spools instantly" and "i love how quick it comes on", etc...I guess it comes down to personal preference. BTW, i have a customer running a GT42R on his 1JZ and he sees full boost about 3700 RPMS with a 1.01 T4 Turbine housing.

 

[annoyingrob]

BTW, i have a customer running a GT42R on his 1JZ and he sees full boost about 3700 RPMS with a 1.01 T4 Turbine housing.

Wow. How did that happen?

 

[tissimo]

Wow. How did that happen?

nitrous to spool

 

[annoyingrob]

nitrous to spool

Ok, I knew there had to be something up.

 

[porsches4lunch]

nitrous to spool

No nitrous, Big cams and a VERY efficent turbo design. Look, some folks may "like" the characteristics of this turbo or that and that is FINE, i am not putting any of the Garrett turbos (GT30R, GT35R, GT40R, GT42R, etc....) but if you want to make MORE than 500 RWHP, you have to go bigger and you are gonna HAVE to sacrifice some low end to make the power.

 

[tissimo]

I highly doubt a 42r is comming on at 3700 rpms.. unless its max boost is like 4-5 psi

 

[porsches4lunch]

I highly doubt a 42r is comming on at 3700 rpms.. unless its max boost is like 4-5 psi

according to the customer, that is what it is doing, i cannot say for sure since i have NOT been there. Bear in mind this is NOT a stock 1JZ. From what i know of the car he has a 30 over block, head work, custom intake, custom made exhaust header, cams, standalone, etc... Again like i said, choosing the turbo is gonna depend on how you want it to respond, what mods you have (big difference) ,street car/race car, pump gas,tranny, etc... Anyway, i will let you know for sure since that is what i am putting on MY 1JZ.

 

[Spaniard]

full booost at 3700 rpms? with a 1.01 hot side? MAYBE...just maybe....it starts to see positive boost at 3700rpms. sorry, i dont think so. Even with this so called "built" 1JZ, sorry, not going to happen. Remember also, with those bigger cams he put in, the turbo has to work that much harder too. I want a dyno sheet or some fact here, not "hear-say."

a 35r yes, it is quick on a 2.5L 1JZ, the evo guys swear by it at 2.0 or 2.2L with great results. But when talking about a response machine like the thread was started on, a 35 is too laggy when the 30 does the job fine without choking up top. If you think a 30 chokes on a 2.5L, I wonder how the Amuse Supra feels with a 30r at top end? wait...i dont have to wonder....it flows just fine setting new track records a tsukuba in japan back in the day.

 

[annoyingrob]

I wonder how the Amuse Supra feels with a 30r at top end? wait...i dont have to wonder....it flows just fine setting new track records a tsukuba in japan back in the day.

There are some dynos of it around on the internet. I know I've seen it (It was in a Japanese car mag), but I can't remember what it looked like.