Abelo

people of CL i am confusedd, google is not cooperating with me for this one...

so when i bought these off a local guy he had a couple of 2jz-gte motors in his garage, one getting bored, polished, the works.. so he didnt need the stock 2j cams. so me being new to the concept of headwork i decided to buy the cams thinking all 2jz cams are the same.

now when i am deciding wether to use them or not its becoming complicated, are they usdm or jdm?? as far as i have read the usdm cams are much better and can add anywhere from 20whp+ and increase the power band by about 1000rpm just by swapping cams with minor adjustments.

so my question is are these usdm or jdm?? and should i swap them in for my stock 1jz-gte cams???

Abelo

the markings say: 2jt, 10, 3 or 9 i cant read it, ... and other stuff i can measure the cams i just dont know what to measure

stockhatch

iTrader: (12)

I think you can measure peak lift by measuring across the smallest, round part of the lobe first. This gives you base circle. Then measure from the point of the tip to the back side of the base (the largest part of the lobe). Subtract base circle to get peak lift. So if the base circle is 1.3" and the big part of the lobe measures 1.5", you have .2" lift

stockhatch

iTrader: (12)

Of course this tells you nothing about duration...

Don't you have to machine 2j cams to make them work in a 1j? Is it really worth the effort?

account2x

iTrader: (5)

I think you have to machine the cams to fit a 1jz. They can't give you a 1000rpm gain.

Abelo

ya apparantly the journals have to be machined down to fit, and it should be cheap and effortless. ill take it to a local machine shop and see price. thanks for the info ill measure that asap

ya you do. well it depends whats the redline of a 2jz-gte motor, usdm and jdm? and 1jz-gte is 7000rpm i believe

Abelo

so a rough measurment,

base: 1"1/4=1.25"
peak:1"3/4=1.75"

so a lift of around 1/2 a inch. what exactly does this mean?

FatBrian81

iTrader: (2)

Now that you know the lift you need to find the specs of the stock 1j and 2j cams and see which one it matches.

Abelo

http://www.toymods.org.au/forums/sho...z%20cams%201jz

so i found the specs but i cant really find anything on usdm or jdm cams for the 2jz. well anyway heres the difference in lifts and duration... is it a decent improvement? or not worth my time

stockhatch

iTrader: (12)

I would not bother, personally. I would just crank the boost.

Luv2xl

iTrader: (5)

^ 1J's fall flat on their face after 6000 rpms or so.. The 2JZGTE cams (machined to work with the 1J head) will help squeeze more out of your RPM band after 6K.. Turning up the boost isn't always the only answer.

To the OP: do research on this, just machining down the journals shouldn't be the only thing needed to be done.

and is it worth it? Definitely, you can get a set of USDM cams for roughly $125 to $175, machining shouldn't be more than $100. That's approximately $275, definitely a great BANG; for the BUCK.. lol

Or you could always save up another $225 and get BC Cams made for the 1J..

Abelo

well i picked up my cams for $100 just cant find the difference between usdm or jdm!!! i will deff get on that research and find out the proper machining specs. power just falls right of around that rpm range thats why i wanted it to keep going.