Tuning Toyota 1jz vvti engine, Vipec V44

[Kim Andre]

Hi

Have anybody here tuned the 1jz vvti engine from Toyota on Vipec ?

My engine tuner was not 100% sure how to tune the VVTI map on the engine.

When you open the vvti engine target "map" you get from 0-100 TPS and 0-7000rpm.

When you plot such as 10 in a route,example on 3000rpm, will it say 10 degree twist on cam?

highest number you can plot is 100, so it seemed a bit strange.

We tried carefully to plot 2.0 in every route from 2000rpm-7000rpm, to se if there was any change, but nothing happends. and hi did`t want to gamble.

[JMP]

From the help file:

The VVT Inlet Target Table defines camshaft position relative to its fully retarded position. A number of 0 in this table will mean that the cam will be at its most retarded position. A positive number indicates advance. Eg 20 would be 20 degrees advanced from its most retarded position. Note that the most retarded position for the inlet cam is its least aggressive position.

I've attached the vvt map from my 2J which uses an almost identical system:

[Kim Andre]

Thanks! That helps a lot!

Do you drive on e85 fuel ? If you do, could you share ignition map table ?

If somebody also have vvti map from the 1jz vvti engine please share! Also Ignition map. I drive on E85 fuel

[Kim Andre]

Has anyone here connected V44/88 to 1JZ vvti engine?

we don`t get vvti function to work.

I think there is different from 2jz vvti to 1jz vvti. I have heard that 2jz has 2 kam sensors (one in rear and one i middle of engine)

The 1jz vvti has only one cam sensor rear at the engine. with 2wires

I`m not 110% sure the vvti is connected like it should be, it don`t get a seperat signal wire from the cam-sensor.

2wires from cam sensor to ecu, 2 from crank, and 2 from Aux 1 to vvti sensor.

[Dave Kriedeman]

Hi Kim,

can you post your PCL file so I can we can check your settings please.

Regards

Dave.

[JMP]

the vvti 2J is the same config as the vvti 1J, single cam sensor at the rear of head, same crank trigger with 2 wire sensor and same 2 wire vvti solenoid.

How have you wired the solenoid?

[Kim Andre]

Hi

Thanks for quick replay! I didn`t see it before now

The + (Power) is same as from the + to the Injectors. and the second wire is Orange With a black stripe. Aux1

I tested today, I actual get 14V from the + and from the Orange and black wire, that can`t be correct ? 2 positive wire, and non ground..hmm

The last file from dyno is Attached.

Kim

Runde nr2 i benken, ikke fungerende vvti.pcl

[Simon]

The reason you are seeing 12V on both sides is due to the ECU only providing a ground when controlling the solenoid.

If you set your AUX to test on this will energise the solenoid and you will see a ground on the ECU side of the solenoid.

[JMP]

main difference I can see between your settings and what I have is related to the Trig2: VVTi offset. You have yours set at 130, I used 170 inline with the Engine Specific Information in the vipec help file.

I also have custom PID configured for the vvt:

P: 8.00

I: 0.07

D: 10.00

Filter: 6

Min Clamp: all 0

Max Clamp: all 100

My cam solenoid is also configured from Aux1, with a frequency of 175Hz. Yours is set to 300Hz.

[Kim Andre]

Hi

Okay, Thanks a lot!

I will trie to plot in the same options as yours.

yes, we tried to change from 50Hz and up to 300HZ just to see if we got any reaction.

Kim

[Kim Andre]

Hi

Today I tried to plot in same setting as Yours, but still not working..Can you check my file With Yours to see if you find something else that is wrong?

Is it correct With cam type inlet/lh ? I tried With Rh also, but still not working.

I have an extra solenoid so I also tested With holding it in my hand when I rev the engine, no movment.

when I run a test at Aux 1 solenoid is working, also when I tried to change to ISC Solenoid, ( just to trie) than it is fully open all the time.

But when I run it on vvt cam solenoid setting it is not working at all...

Also one other thing was strange today, when I did som changes to the vvti setting an so on, I pressedF2 all the time, Also Save as, and F2. But when I turn off and start again old setting was comming up..several times this happends, to get it to work I needed to open file and download the New saved file to the ECU. than the changes was stored..WTF? this have never been any problem before ( I hope) than mabye some changes haven`t been stoored..

Etter runde nr 2 i benken, juster vvti i verkstedet.pcl

[Dave Kriedeman]

Hi Kim,

when you make a change you must store (SAVE) it to the ECU using F4 key.

F2 only SAVES the changes to the PCL FILE.

Are you testing the VVT control at an engine speed greater than your 1500 rpm lockout value.

In your PCL file that you have saved it shows the VVT is inactive due to RPM LOCKOUT.

It also shows that you have the CAM TEST RUNNING, (SET TO ON)

Under the VVT Setup page you must set CAM ANGLE TEST to OFF, when testing is done for the VVT to function.

Regards

Dave.

[Kim Andre]

Hi

I forgot the F4 Thanks!

Yes I tested it over 1500rpm.

So If I set the cam angle test to Off the vvti solenoid will work ? I have to test that tomorrow!

You don`t see anything else that is wrong With the setup? I`ve been 2 times at the dyno, but we have never got the vvti to function! So Next time I don`t og before I got the solenoid to work first

Kim

[Dave Kriedeman]

Hi Kim,

Yes the VVT Cam Angle Test must be set to OFF.

The VVT Cam Angle Test must only be turned ON when doing the trigger test count for VVT.

With VVT Cam Angle Test turned ON the VVT will not function.

Sorry I have been very busy and haven't had a chance to look at your file any closer as yet.

I will try over the weekend, but have lots of dyno work to get through.

Regards

Dave.

[Kim Andre]

It is working now Thanks a lot!

[rune]

In other ecus the inlet values are % so 100% will be 30 degrees advance.I dont know how its working in vipec, someone know?.I have also searched for info regarding vvti and from what I read the table should be advancing further up in register if bigger cam and more turbopressure is added.Someone knows?

[Simon]

In the vipec it is in degrees of advance.

So a figure of 30 will be 30 degrees of advance from the cams most retarded position.

[rune]

Im going in the dyno again to test this.Last time with"oem" vvti settings I couldnt reach the hp I wanted.Torque was high but hp stopped at 500.Something odd was holding it back.Im going to adjust the hole table to where my turboes are kicking in and hope for better result:)

[rune]

I have full pressure in about 4300 and the cam was at 0 at that point.I read that its actually -15 when the setting is 0 so I hope thats the reason I was out of air

[muzzytt]

bit of an old thread but it covers some of what I'm looking for.

I've got a Toyota 2jzgte vvti engine . its got a smallish GTX3076 turbo with 1.06 housing I get Full boost at roughly 3400 rpm it pretty much builds boost from 1500 rpm .

now I suspected my vvti maps were not touched by my tuner he said playing with the camshaft made not much difference which I think would be true for outright power. the point was to use the vvti feature to improve midrange of the power band.

I have seen a few vvti tables around the site and most are using tps position to activate the cam. I see on mine its based off MAP is there a preferred way to activate it.

I'm going back for a new tune and want to give my tuner as much info as I can to improve the engine throughout the rev range wich the engine is capable of .

Im running the flex fuel so I am tuned to run 98 or e85 though I do run e85 mostly.

so with above info what should my vvti map looks like can I improve response below the full boost rpm of 3400 ? taking into consideration I have installed new tomei 260ex and 252 inlet cams I have also installed an adjustable cam gear.

my fuel consumption is really bad try like 22 ltrs per 100km !

thx for any help advice !

Muz

[Dave Kriedeman]

Hi Muz,

put simply the VVT tables MUST be tuned on the dyno.

Much like ignition timing there is no golden rule to what settings to use.

Tell the tuner to advance blocks of VVT cells say 4 at a time in a square to see what difference it makes to the torque output from the engine,

Simple, similar to ignition timing, advance and retard to find maximum torque, you will reach a point where the gains are marginal.

If the engine is boosted I use MAP for most Y axis settings on tables.

Upto the tuner himself what he wishes to use and why.

Regards

Dave.

[muzzytt]

Dave thanks mate that is great thanks for the reply

[Dave Kriedeman]

Hi Muzzy,

my pleasure, good luck.

Let us know if there are any issues.

Regards

Dave.

[Kim Andre]

Hi! I can see that it is long time since I made this thread

We are now back on tuning a new build 1jz vvti engine, with Tomei Poncams. BC springs, shimless lifters, piston/rods etc..

We had some touble with the grip on the dyno. we got 490hp on 1.3bar boost, full pressure on 3600rpm.

We had a run on 2bar, the reading was not correct, but we got 576hp. We need to trie with wider tires to get more grip on the dyno. And need to change the spring in the wastegate so we can pull a run on 1.5-1.6-1.7 etc..

We did no change on the vvti table this time, we will trie on the next dyno run!

ARE YOU GAYS 100% SURE THAT THE VVTI SOLENOID IS NOT ONLY ON AND OFF ?  Can it adjust the cam in degrees, (Eg 20 would be 20 degrees advanced from its most retarded position) What is maximum off degree adjustment?  if we plott in 50 to 100?  

[Adamw]

Yes the 1JZ VVT is fully variable intake cam only. In relation to the target table;  Zero is "home position" fully retarded. Any number above zero is degrees advance from home position.  I cant tell you what the maximum advance is for this engine, I expect probably <50 degrees.  You can check by watching cam position parameter and keep advancing until it stops moving.