JUN Auto high lift cams question

[Innovative 1]

RHD japan sells the JUN HIGH LIFT CAMSHAFT - REGULAR SERIES TOYOTA 1NZ-FE which I want. Says on notes that they will not work with stock oem ecu. Then right below it says "The camshaft already adjusted the valve timing. It is bolt-on camshaft which can use with stock valve spring and computer."
Little confused. What does this mean? If anyone can help explain let me know please and thanks peoples

[scod4025]

the difference you are looking at is in the name

■Bolt-on Camshaft Series

■Regular Camshaft Series

the bolt on series will work with stock ECU

the Regular series will need to have tuning done for it to work properly
so would need some kind of cam control ie stand alone ECM and possibly update of valve springs



so if you don't have control over the cam timing you can use the bolt on series but not the regular series(might be able to but would be very risky most likely just wouldn't fire but could hit valves)

[0BD1Kenobi]

This is in the parts description on rhd

"FEATURES:
Bolt-on Camshaft Series:
- This camshaft already adjusted the valve timing. It is bolt-on camshaft which can use with stock valve spring and computer.

Regular Camshaft Series:
- This series can be used in wide stages from the street spec to the high power engine."

[Jason@SportsCar]

Originally Posted by Innovative 1

RHD japan sells the JUN HIGH LIFT CAMSHAFT - REGULAR SERIES TOYOTA 1NZ-FE which I want. Says on notes that they will not work with stock oem ecu. Then right below it says "The camshaft already adjusted the valve timing. It is bolt-on camshaft which can use with stock valve spring and computer."
Little confused. What does this mean? If anyone can help explain let me know please and thanks peoples

You would be way ahead of the game working on the ECU first, there is more power there than in the cams, and the cams without tuning only yield a small portion of its potential.

[Innovative 1]

Please explain the ecu route a bit more if you would.

[Jason@SportsCar]

Originally Posted by Innovative 1

Please explain the ecu route a bit more if you would.

Going full standalone, or piggyback, will get you more power than the cams. I have the 9.5mm Jun cams, they make a very small amount of power, and without the ability to tune you will see almost no improvement over stock.

[Innovative 1]

Like once I install tge power enterprise supercharger with tge p-con sub computer that it comes with?

[Berkut]

Keep in mind that Jun shafts produces only for early ver. motor without the rockers.
In the case of installation shafts will need to change the head on the short, in connection with the EGR system will not work.
and put the coil from an earlier version 1nz.

I stand 252 cams with stock ECU, a significant change. Acceleration increases up to the cutoff.

[gaelicfrank]

Originally Posted by Berkut

Keep in mind that Jun shafts produces only for early ver. motor without the rockers.
In the case of installation shafts will need to change the head on the short, in connection with the EGR system will not work.
and put the coil from an earlier version 1nz.

I stand 252 cams with stock ECU, a significant change. Acceleration increases up to the cutoff.

So to confirm, the JUN CAMS with NOT WORK, with my 2009 Vitz RS... is this correct?

[xnamerxx]

Depends if you have a EGR head or not, US and EU cars don't but SEA cars do. Easy check is to pop your valve cover off and see if you have rockers or solid lifters.

[remcafee]

i have the bolt on series cams and they i will say they say it works with stock ecu but what they dont say is how the overall drivability is, so what you will experience is about a half a second of increased startup, random misfires for the first 30 seconds on startup, and very bad fue economy, i track my yaris regularly and honestly regret the jun cams as i daily drive it, but performancealways comes woth a sacrifice, if you are ok with uncomfortable driviability issues for a 6 whp increase (i dynoed them before and after) its up to you. im just letting you know my experience with them, if youre daily driving, leave the cams alone, and youre talking about the high lift ones, you NEED a standalone ecu with that one, even the bolt on series struggles with stock ecu i cant imagine the regular series

[xnamerxx]

Rem you'll need to get the car tuned for the cams since it probably wants more timing and less fuel.

[remcafee]

yeah definitely a tune would help, i cant put it in a piggyback atm as i have emissions where i live

[xnamerxx]

I live in CA have the same issues, reach out to FTGtuning@gmail.com guy is up in Oregon but he can tune the stock ECU.

[remcafee]

thanks man! didnt know our stock ecus were tunable?