New plans for the 3.4 to 4.o swap

[Matthew Starr]

New plans for the 3.4 to 4.0 swap

I have recently discovered (which is kind of stupid on my part cause its been right in front of my face the whole time) that the 1GR-FE is in fact the exact same motor that was in the Supra. The only difference is that the 1GR is 1 liter bigger than what was in the Supra. Toyota actualy based the designs of the the GR motors off of the 2JZ-GTE, I know that the 2jz was an inline 6 but the configuration has nothing to do with it.. So, that being said and with all the researching i've been doing, I have decided to twin turbo charge my runner instead of waiting for TRDs supercharger...

 

[shootmymime]

will a 2jz fit in a 4runner? prob..... then twin turbo 1000 hp right there

 

[p nut]

I have recently discovered (which is kind of stupid on my part cause its been right in front of my face the whole time) that the 1GR-FE is in fact the exact same motor that was in the Supra.

What are you talking about? 1GR is a V6. Supra's have all had I-6. Calling them the same motor is like saying a 4Runner's the same thing as an Explorer.

 

[Clemsonfan15]

Turbo would be cool aswell.

 

[scotts97T4Rltd]

Dude,
have you been smokin the crackpipe? The 2jzgte is an inline 6, and the other motor in question is a V6. What is exactly alike on those engines?

 

[Matthew Starr]

Toyota based the designs of the the GR motors off of the 2JZ-GTE, wich means that the 1gr can handle extreme compression just like the 2jz. I know that the 2jz was an inline 6, but the cylinder configuration has nothing to do with it. both motors have the same lifters, cams, valves, almost the same crank shaft and both are made out of aluminum.

 

[scotts97T4Rltd]

Toyota based the designs of the the GR motors off of the 2JZ-GTE, wich means that the 1gr can handle extreme compression just like the 2jz. I know that the 2jz was an inline 6, but the cylinder configuration has nothing to do with it. both motors have the same lifters, cams, valves, almost the same crank shaft and both are made out of aluminum.

First of all, the 2JZ-GTE is an IRON BLOCK. Its compression ratio is 8.5 to 1. The V6 is 10.0 to 1. Lower compression is better(safer) for boosted applications. How can it share the same cams? The cams on the 2j are LONGER than the V6 ones. The V6 has FOUR CAMS, the 2JZ has TWO CAMS. Same goes for the crank. The crank of the 2JZ is FORGED. The V6 is not. The V6 has variable valve timing, the 2JZ DOES NOT. There are NO similarities of these engines whatsoever! You may want to go back to the drawing board on this one!

The only way to make a high boost GR motor is to lower the compression, and replace the stock internals with FORGED internals.

 

[Matthew Starr]

First of all, the 2JZ-GTE is an IRON BLOCK. Its compression ratio is 8.5 to 1. The V6 is 10.0 to 1. Lower compression is better(safer) for boosted applications. How can it share the same cams? The cams on the 2j are LONGER than the V6 ones. The V6 has FOUR CAMS, the 2JZ has TWO CAMS. Same goes for the crank. The crank of the 2JZ is FORGED. The V6 is not. The V6 has variable valve timing, the 2JZ DOES NOT. There are NO similarities of these engines whatsoever! You may want to go back to the drawing board on this one!

The only way to make a high boost GR motor is to lower the compression, and replace the stock internals with FORGED internals.

first of all each cylinder of the GR is lined with iron and the im talking about similarities in materials. both motors are DOHC and guess what they're both aluminum, and do your research again cause the 2jz does have VVT-i. and im not saying the parts between the two motors are interchangable, what im saying is that there is similarities between the two motors and with very few modifications the GR can be better than the JZ. And i would put a jz in my 4runner if i could find one

 

[scotts97T4Rltd]

first of all each cylinder of the GR is lined with iron and the im talking about similarities in materials. both motors are DOHC and guess what they're both aluminum, and do your research again cause the 2jz does have VVT-i. and im not saying the parts between the two motors are interchangable, what im saying is that there is similarities between the two motors and with very few modifications the GR can be better than the JZ. And i would put a jz in my 4runner if i could find one

And how many supra engines have you put together sir? I have put together, and installed several motors on multiple supras, so i know what i am talking about. The 2Jz is an iron block! What leads you to believe that the block is aluminum? If you are right, you will be able to document your findings, but i will guarantee you with a little more research on your part will reveal that i am right. The GR engine does not even have any FORGED internals. The 2JZ-GTE did not have variable valve timing until after 1998. The variable valve engines did not come in the USDM Supras, since they were discontinued in the states before the VVT was avalable.

Here is a little info on the 2JZ engine in the most basic way for you to understand it.
http://en.wikipedia.org/wiki/Toyota_JZ_engine
Most high HP aluminum block engines arent reliable. Look at the Corvette LSx engines. Most of the corvette guys that are building a high HP car(especially boosted) go with an aftermarket IRON block for that very reason. BTW i am an X corvette guy. I would compare the GR engine to the VQ35 series motors that are in the 350z, and g35. They can make some decent power with forced induction, BUT with the lack of the forged internals, paired with the aluminum block are limited to a little over 400hp before they become unreliable.


The only similarities between the 2 motors is they are manufactured by Toyota. I will be happy to post this thread on the Supraforums, and let you argue with them about it.

 

[4Evr4RunN3R]

And how many supra engines have you put together sir? I have put together, and installed several motors on multiple supras, so i know what i am talking about. The 2Jz is an iron block! What leads you to believe that the block is aluminum? If you are right, you will be able to document your findings, but i will guarantee you with a little more research on your part will reveal that i am right. The GR engine does not even have any FORGED internals. The 2JZ-GTE did not have variable valve timing until after 1998. The variable valve engines did not come in the USDM Supras, since they were discontinued in the states before the VVT was avalable.

Here is a little info on the 2JZ engine in the most basic way for you to understand it.
http://en.wikipedia.org/wiki/Toyota_JZ_engine
Most high HP aluminum block engines arent reliable. Look at the Corvette LSx engines. Most of the corvette guys that are building a high HP car(especially boosted) go with an aftermarket IRON block for that very reason. BTW i am an X corvette guy. I would compare the GR engine to the VQ35 series motors that are in the 350z, and g35. They can make some decent power with forced induction, BUT with the lack of the forged internals, paired with the aluminum block are limited to a little over 400hp before they become unreliable.


The only similarities between the 2 motors is they are manufactured by Toyota. I will be happy to post this thread on the Supraforums, and let you argue with them about it.

if i recall, the naturally aspirated 2jz got vvti in 1996 ( i believe), but the turbos didn't. the NA 2jz only got a 5 hp increase with the vvti.

 

[Stick Figure]

if i recall, the naturally aspirated 2jz got vvti in 1996 ( i believe), but the turbos didn't. the NA 2jz only got a 5 hp increase with the vvti.

it was available in the states in the 98 NA Supra, the GS300 (starting around the same year not sure on the exact year), and the IS300.

As far as the two being similar, of course they are, they are both toyota engines.... the lifter design is pretty much identical across the whole Toyota line up when you compare anything w/ in about the same decade of production.

What you are really missing here is that the 2JZGTE is a G series engine meaning it was designed from the ground up as a performance motor head is designed to flow better for high HP. The F engines were designed for economy w/ more low end torque. Thats what makes the 2UR V8 in the new ISF/LS460 so exciting... its the first true performance V8 offering from Toyota. Anyway the two really are pretty opposite ends of the spectrum as far as Toyota engines go, but of course they share similar design traits being that they are both Toyota engines, and it would be silly to not use what they learn from one enigne on the next.

 

[Matthew Starr]

ok you're all right. That was a stupid comment on my part. Oh and p.s. I know the 2jz is and iron block, the gr is aluminum with iron lined cylinder walls.

 

[scotts97T4Rltd]

in my opinion, you are kind of taking a step back using the new engine. the 5VZ-FE has been known to be a great strong engine. The iron block is a better starting point. In fact the 5VZ, like the 2jz-gte, was over engineered to handle a hell of a lot more than what it is doing stock. I dont think it is a good idea to have forced induction for the 1GR, because its not strong enough to handle it(especially since the compression is 10.0 to 1. If you are doing this for performance, you will be disappointed. Im making just as much power with my supercharger as what you are going to be making with your swap, and with the proper fuel mods, i can surpass that. You would have been a lot better off to have just spent the $$ and gone with a supercharger, or a custom turbo set up...No need in reinventing the wheel.