1jz modifying guide

[bodybodyrock]

ive got a 1jz with standard ct12 tubos on it and my car blows bulk smoke so im asuming one of the oil seals has gone on the turbo, which is realy no real suprise there. my questions are is (and before anyone says it no i cant realy aford to go one big single)

it werth hiflowing the ct12's with steell wheels?? and will it make decient ponies?

computers for 1jz? wats goodish? and wat can the standard ecu put up with?

and finaly wat have u guys done to ur 1jz motors and wat kinda ponies are they putting out


thanks heaps

[Milhouse]

i think the guy from AFARCC with the supra... stock turbos seems to make decent power. im unsure if his turbos are steel wheeled tho

[Philthy]

steel wheeling the ct12a's isnt cheap, but u can make some power from it. 1jz standard turbos will make like 350rwhp as a max output, for this u need, full zorst (with dumps), fmic, ecu, ebc, cams and u should make around 350 at a little over or on 1bar.

www.supraforums.com.au

www.soarercentral.com.au

these two sites will prob help aswell

[Brockas]

it werth hiflowing the ct12's with steell wheels?? and will it make decient ponies?
No, highflowing and steel wheel costs more than single turbo.

Steel wheel conversions support 270rwkw.

Management, depends what car the 1JZ is in.
Digital dash + auto, E-Manage is probably the way to go, or S-AFC II and S-ITC if you can find one.

Mods list for mine at the moment:
Exhaust
Dumps
Filter + Hole in airbox
FMIC
Boost (15psi)
S-AFC II
Oil Catch can

Makes over 300rwhp.

Make sure you get an oil catch can if you just replace the turbos, as it helps prevent them blowing.

[RGVFAST]

stockers should be good for 300 or very close, they dont liek big boost, but ive seen more then a few 1jzs making 300+ on 14 psi or so

exhuast/cooler and safc seem to be the best odds on making the 300hp cheap

ecu depends if u are auto or manual. auto is **** all options, manual u can choice any full ecu u desire

my mods r stock 1jz
GReddy t78 kit
cooler
exhuast
hks 550cc injectors
and microtech lt12s

highest dyno been 409rwhp, plenty more ponies to be had with more boost and aftermarket cams

ROSs
________
herbalaire vaporizer (http://www.vaporshop.com/herbalaire-vaporizer.html)

[Miami]

Yeah, price up the real cost of steel-wheeling the stockies, and all of a sudden you realise bang-for buck, considering the options going big single opens up, its a much better option.

ECU's - standard ecu can put up with a lot, the question is more, what can the standard injectors put up with?

Microtech can be done, a lot of problems reported with digital dash, electronic climate control and other electronics on the soarer not present in the supra, but if your installer knows the soarer properly, can be done.

I actually dont mind the Jaycar unit, its a pretty smart piece of kit, and a lot more adjustable than some others on the market - just not as pretty, and good luck getting any reputable workshops to tune it on their dyno, cos they dont trust them, for valid reasons or not.

my mods (and my cars a daily):
FMIC, custom piping
pod filter, custom piping
custom 3" flange-back exhaust, single HKS 4" cannon
hi-flow cat
refurbished radiator
new head gasket
supra w58 5 speed manual
6 puk Extreme heavy duty brass-button clutch
supra 3.7:1 ratio torsen LSD
440cc injectors
Garrett GT3040r 600hp turbo
Tial 38mm external wastegate with screamer pipe
walbro 255 fuel pump
Blitz BOV (soon to be Tial 50mm)
2jz 18psi MAP sensor
jaycar independent electronic boost controller with Greddy solenoid valve
jaycar digital fuel adjuster
oil catch can
Lucas TRW brake pads

no idea on power, not been near a dyno yet, just a road tune with the wideband, and only on 0.9 bar boost at present. Will get around to it one day. Was built with an aim of 400rwhp off about 18-22psi. Dont know if its quite there, but would have thought 380rwhp is achievable, safely and reliably (ish).

[Miami]

Ross, whats the approx. cost of the LT-12s??

[RGVFAST]

just under 2k wired in and tuned
________
adam ty dean smith (http://www.ford-wiki.com/wiki/Adam_Ty_Dean_Smith)

[bodybodyrock]

thanks heaps ppl
yea the cars a jzx81 digital dash ect, climate controle is all disconected tho

so far the mods ive got are
front mount
pump
3' exhaust
heavier clutch
filter
safc

its making enuff power as it is to have fun but becomes lame pretty fast

im torn between two worlds? wats the price estimate of going single?
i gather bout
600-900 for manifold?
2-2.5k for turbo?
plus geting all pipe work done?
then boost controler
puter to make it all work
it all adds up way to fast

[RGVFAST]

if ur buying mostly sec hand gear price brake down be liek this
2-3k for turbo kit (mani turbo and gate)
2k for ecu and install
500 for big injectors
300-500 ebc
1-2k to fit it, joint up exhuast, new oil/water lines

budget for 5-6k and ull do eveyrhting right with brand name components

obviously willbe a lot more if u buy all new brand name bits ie tubeo kit likely to be close to 8k

ROss
________
axela (http://www.ford-wiki.com/wiki/Mazda_Axela)

[RGVFAST]

flip side is u can go helll budget

twin to single mani adaptor is liek 150 bucks
cheap internal gate turbo 500 bucks sechand?
jap/us spec 2jz injectors 2-400 bucks
safc -200
and a tune 2-300 bucks

get the right turbo and high 300s deff possible

ROss
________
mexico hotels (http://mexicocityhotel.info)

[Rhys]

This wouldnt happen to be this vehicle would it - - http://antilag.com/forums/attachment.php?attachmentid=915


If so there are some other mods done to that car then you might think

[TJ]

My suggestion : make sure your exhaust isnt so loud you cant here possible detonation.

Seriously, it might sound cool, but might cost you an engine.

[bodybodyrock]

My suggestion : make sure your exhaust isnt so loud you cant here possible detonation.

Seriously, it might sound cool, but might cost you an engine.



is that wat hepened to urs tj or is it just a common problem i should look out for?, or is it my particular car thats prone to it?




ONEJZX90; yes thats my car and wat do u mean by other things done to this car??

[RGVFAST]

tj is trippn
1jz r strong, their turbos r weak
detination is deff not a common problem with 1js

gettn a quiet exhuast is pointless if u wanna make power
________
medical marijuana (http://dispensaries.org/)

[Mofo]

1JZ turbos, injectors, fuel pump and to a certain extend the stock ecu, are all good for 350 whp absolute max. you wouldnt want to run much more than that through the stock ecu with a fuel computer.

that being said if 350 isnt enough then time to go single.

i ran 105.8 mph in a 1.6 tonne supra with just a pod, turbo back exhaust and cooler, running 1 bar. XSpeed dynod at 278 rwhp. no boost control no fuel computers.

ive got a power fc and eventually cams and cam gears to go in yet so the fun is really only just starting. mind you im chosing this route rather than straight to the single turbo as i wanna see what the stockies really are capable of.

my turbos smoke on occasions too but still produce the power, im considering swapping some low km replacements in but thats more of a bandaid fix more than anything.

good luck.

[bodybodyrock]

if i was to go down hte big single path wat turbos should i be lookin at to suit the motor and mods.. other mods would be injectors ecu ect ect

[bodybodyrock]

This wouldnt happen to be this vehicle would it - - http://antilag.com/forums/attachment.php?attachmentid=915


If so there are some other mods done to that car then you might think


explain anyone??

[Endless]

Turbo choice depends on how much power you want to make...

I think i remember someone saying your car has aftermarket cams?

[bodybodyrock]

just under 2k wired in and tuned

LT-12s a good option??

also wher do u guys take ur toytas to be werked on, ive spoken to a few ppl and they all seem to think htat places in perth for toyota are limited as most specalise in nissan?

[bodybodyrock]

Turbo choice depends on how much power you want to make...

I think i remember someone saying your car has aftermarket cams?


ide like 450ish, weather it hapens or not is a diferent story, but as of now im doing all the reserch as goin single is in hte not to distant future, i figure ill reserch it all first b4 diving into anything

[1JZX90]

hey mate

im in the same boat looking for around 400ish and planning on going single turbo. mainly looking for response so any input would be helpful, i was thinking GT3076R?
not sure on ecu atm cos i dont know whether to stay auto and shift kit or go a five speed.

current mods just fmic, 3.5exhaust, pod & boost controller

cheers, steve

[Brockas]

You want really good response, go for a GT30R with 0.62 rear or as close to that as you can, other option is try to source a HKS 3037s Pro kit, wont be cheap but it will be great for a 1J.

Will need some boost to get to 400, but 1J's can handle it so who cares.

Auto with shift kit probably wont handle 400, 350 is their rated power.

Use either a S-AFC II or an E-manage if sticking with auto.

[1JZNOSHIT]

GT30R with 0.82 rear housing is good. got it on my RB25 and its showing signs of being quite responsive. just waiting on a final tune with some boost.

[1JZX90]

cheers heaps brockas

any idea on how much the manuals can handle and how reliable they are? iv read mixed reports from car magazines (HPI) and from owners. general idea is that they could handle 400hp but give them any sort of thrash and they're likely to blow up??

steve

[iluv2moan]

they are expensive but highly reguarded as THE best turbo up[grade for a 1jz

http://www.rampant.net.au/shop/product_info.php?products_id=322

[hayai]

if you check out www.jzx100.com there is a user on there called ghost who is running a GT30R and on his JZX90 and also a user called Pat-O running a GT30R on his JZX100 both i believe are running the .82 a/r version and say it's very responsive.

I'll be aiming for a GT3037s Pro but i'll be hold reservations of it actually breaking the 400rwhp mark though i have no doubt it will come close at the very least.

[Tats]

Keep in mind that Greg (ghost) has a 2J bottom end.... the way that thing moves is brutal....

[hayai]

oh he does ?? must have missed that .... if thats the case then why only a GT30R LOL

[Muppet_Guy]

I've just had steel wheeled and hi flowed CT12a's installed. Added custom dumps, 3" midpipe and 3" hi flo cat, attached that to my standard catback (looking for a custom not too loud one at the moment).
Installed SAFCII and Greddy EBC. Natural boost went up to 10psi and 227 rwhp (from stock 8 psi and 211 rwhp). When I put it up to 12 psi it makes 252 rwhp. Cannot increase any more boost until I install FMIC, as the stock one is the biggest restriction. Putting it up to 14 psi for example does same power, but the air is heaps hotter, so not good. Was told by the tuner once FMIC is done, and a fuel cut defender, boosting it to 18 psi shoudln't be a problem, which should hopefully put out well over 300rwhp.
Having them hi flowed makes quite a bit of difference, for example Luke (wadragracing) gets same amount of power as me but on stock ceramic turbos at 15 psi as opposed to 12.

All up cost me under 5K, plus the cooler that I need to buy, and did most work (apart from tuning) myself. So say will cost 5.5K to bring it to over 300 rwhp... Don't need anymore than that.. for now :lol:

[hayai]

since i have the JZX100 i'm running the same single turbo CT15b as mischeif1 been looking around and haven't been able to find out much about the max capabilities of this turbo. have a few goodies on the way so will find out soon enough though i think mischeif1 is just waiting to get his tuned.

[S_E]

for twins this would be have to be one of the best value upgrades...

http://www.performanceforums.com/forums/showthread.php?t=67204570