rpk2012

Okay everyone, I know there are threads about stock power limits of factory turbos, but I am looking to put a thread together to compare all PRO's and CON's with which motor comes out on top.

1JZ-GTE:

PRO's - Non-Interference motor

CON's -

Max power ~ Stock twins:

1JZ-GTE VVTI:

PRO's -

CON's -Interference motor

Max power ~ stock turbo:

2JZ-GTE USDM:

PRO's -Non-Interference motor

CON's

Max power ~ stock twins:

2JZ-GTE J-spec:

PRO's - Non-Interference motor

CON's -

Max power ~ Stock twins:

2JZ-GTE VVTI:

PRO's -

CON's - Interference motor

Max power ~ Stock twins:


Just trying to put together a solid thread for comparison. If there is another thread like this that I missed in searching, please link and close this for me.

Will update PRO's and CON's with valid reponses.

t70 supra

iTrader: (-4)

U need to search but the vvti a retard camming system

rpk2012

Did search. If you read what I posted. Lots of info, not exactly all what I am looking for and I wish to put together an all in one type of thread. Maybe There is an exact replica of this thread and the search terms I used didn't turn up anything?

turbodremz

iTrader: (18)

Well the ceramic-turbo based GTE engines automatically fail in this category hands down. They are proven and have a horrible reputation for failing, not to mention from what I have read on several different forums the VVT-i interferes with tuning, and if something goes wrong, like you posted its an interference engine.

IMO, for straight BPU power, USDM 2JZ-GTE. Has been accomplished time and time again.

94_soarer

iTrader: (8)

^^^
Im wit you!!!

soarer13oy

iTrader: (13)

+1 turbos can handle some boost.

t70 supra

iTrader: (-4)

sorry for the half *** anwser before.
but i like the vvti because it has a automatic cam system that retatrds and tells the factory ecu when to give full power i dont like the fly by wire throtte carble i think is very un-useffull when modding but can be deleted by adding a reg 1jz throttle body and throttle body control off of the jzx90 harness. the ct15 is the biggest factory turbo to come out of japan period. is 25% bigger than the ct-26 i run 300.00 hp off the dyno anyday and thats with no ebc controller
i have seen these go up to 500hp+ easy the only down fall of vvti is

u cannot use the vtech controller
pain in the *** to tune if ur tuners garabge
parts are hard to get unless ur smart enough to get on yahoo japan
only a few ecu suit them
wiring is a striaght *****
finding a good motor is hard

by far the vvti motors out last all the old motors thier the new stuff in the states so far but thier pricey as all hell.

thier only a few tuning options for the vvti is
motec
aem
hks
vmanagment
emangament

i really dont see anyone tununing yje 2jz vvti or maybe i havent look hard enough.
http://www.3sgte.com/1JZGTE.htm

turbodremz

iTrader: (18)

^^ I can see some of your points, but I would stray from the VVT-i for a couple reasons. #1 being that the internals have been proven to be weaker, therefore some of the rotating assembly needs to be built, which for BPU is pointless. Second, there are several people on SF.com that have complained about tuning complications with the VVT-i and the automatic timing adjustment when its engaged makes it difficult to tune without a stand-alone EMS. Therefore in the end, a non-vvti GTE is still cheaper for all out BPU power and reliability.

t70 supra

iTrader: (-4)

Turbo find out what ems they were using and I can solve it

The internal on the non turbo are weak

U will have to use a step up Rom to control the evidence for better results

soarer13oy

iTrader: (13)

Either way....usdm 2jzgte bpu ftw!!!

t70 supra

iTrader: (-4)

Got this from my hommie in Australia

hey cameron,
*
mate i understand your pain, in australia its all about dam nissans, i used to own a 417hp r32 gtr, and sold it to buy a jzx100
*
nissans make power but not for long. 1j is what everyone in australia is putting into nissan cars.
*
mate if you want power you really need a dump pipe, i dont know what you call them in the us but here is the link on my site.
*
http://i997.photobucket.com/albums/a...9022010312.jpg
*
i have many customers in australia who make 300hp + at the back wheels thru a manual using this dump pipe and 15-16psi tuned.
*
just using this on a untuned factory computer expect around 260hp at wheels.
*
*
i sell my exhausts all over the world, but never in the usa at this stage.

Biggu

iTrader: (12)

on stock twins stock downpipe with 4" mid to 3" dual running an AEM EMS i was able to put down 380 to the wheels. I think my boost was 17psi tapering down to 16. Its possible to make power but it depends on how you drive and how you treat your car.

94_soarer

iTrader: (8)

Yea i member u posting this, u made pretty good power on 1J twins, u werent scared of blowing them at that psi tho???

Wit a 3" DP,3" Exhaust,4" Fmic and Intake & no boost controller im at about 14-15psi... if i stay on it long enough i hit jus ova 15psi, i guess since i dont have a boost controller it doesnt go right to 15psi..u kno??

u think 15psi is safe?

t70 supra

iTrader: (-4)

Has anyone ever upgrade the stock 1jz

I know speed for sale a sequential spoiling kit but I know u would make full boost at 4200rpm the vvti makes full boost at 3200 rpm but I am anxious to know what will it do with a cam and the tech greedy v management controller

BoostedSC3

wow.. theres some mis information here.. there is no difference in internals vvti to non the in the GTE engine family. The GE vvti motors got the weaker rods.

As far ad HP goes i'm not sure. With an open diff, front mount and exhaust and stock everything else the vvti 1j auto in my sc ran 13.20's easy even with my 300lb *** behind the wheel. I get north of 20 mpgs on almost every tank, and can't wait to get a FCD and see this thing will do at about 18psi..

I've ridden in a few 1j bpu cars and theres noting like having peak torque down arund 2500rpms and the mapecu, emanage, and just about any other ems out there now can handle the VVT-I..

now that i've owned the vvt-i motor i won't own a regular 1j