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Bring on the 12's...
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Interesting stuff!

Time for some ricer math :gap:

If the stock ecu is running stage 2 or 3 cams, then the efficiency of them is seriously being pegged back because of the vvt retarding so much on the smaller lobe, when it has more to offer over the stock lobe...hmm, probably that explains why I felt more of a difference <5000 rpm than I did above 5000rpm and beyond.

Man I can't wait till I get pfc tuned!!!
 

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:AF: Ricer math expert over here! Sounds about right though ... you can really get a huge difference out of the smaller lobe once you switch to the PFC and tweak the settings
 

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Interesting stuff!

Time for some ricer math :gap:

If the stock ecu is running stage 2 or 3 cams, then the efficiency of them is seriously being pegged back because of the vvt retarding so much on the smaller lobe, when it has more to offer over the stock lobe...hmm, probably that explains why I felt more of a difference <5000 rpm than I did above 5000rpm and beyond.

Man I can't wait till I get pfc tuned!!!
After a PFC tuned with the PPE header on top of those cams, you will get a good difference, especially from 5k and up. The 5k to 6k gain is planely insane! It's probably because there is not enough overlap in that rpm range with the stock ecu as you just stated. Lift VVT values do not look THAT bad though.

PFC is your top priority now! :p
 

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Bring on the 12's...
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Hehe, indeed. I will end my winter mod thread and start a thread called "Finally getting PFC tuned next week!!" at the start of July...not long now :gap:
 

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Do you have pwm signal readings for this? Have you Oscoped this signal to see which value equates to what degree advanced?


Hi folks!

Since I 've found no info regarding stock VVT values of the 2ZZ-GE, I will provide these values as a result of a V-Manage log. These values are from a european ECU of a Corolla T-Sport.

RPM - Degrees of VVT advance
3000 - 24
3300 - 24
3500 - 34
3700 - 38
3800 - 38
4500 - 24
4800 - 24
5700 - 13
6250 - 13
6300 - 43
6500 - 43
6600 - 40
7000 - 40
7800 - 26
rev lim - 26

Here is a screenshot of the log:


Here is a screenshot of the above values plotted by Excel:


I think that they match almost perfectly.

Hope this helps anyone doing VVT tuning!
 

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Based on this, time on/total time inbetween x 100 = the vvt duty percentage

I'm going to buy an Oscope now :)


 

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Looks like the 05-06 Corolla XRS is about the same (sans the changeover rpm difference)










Hi folks!

Since I 've found no info regarding stock VVT values of the 2ZZ-GE, I will provide these values as a result of a V-Manage log. These values are from a european ECU of a Corolla T-Sport.

RPM - Degrees of VVT advance
3000 - 24
3300 - 24
3500 - 34
3700 - 38
3800 - 38
4500 - 24
4800 - 24
5700 - 13
6250 - 13
6300 - 43
6500 - 43
6600 - 40
7000 - 40
7800 - 26
rev lim - 26

Here is a screenshot of the log:


Here is a screenshot of the above values plotted by Excel:


I think that they match almost perfectly.

Hope this helps anyone doing VVT tuning!
 

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Hi folks!

Since I 've found no info regarding stock VVT values of the 2ZZ-GE, I will provide these values as a result of a V-Manage log. These values are from a european ECU of a Corolla T-Sport.

RPM - Degrees of VVT advance
3000 - 24
3300 - 24
3500 - 34
3700 - 38
3800 - 38
4500 - 24
4800 - 24
5700 - 13
6250 - 13
6300 - 43
6500 - 43
6600 - 40
7000 - 40
7800 - 26
rev lim - 26

Here is a screenshot of the log:


Here is a screenshot of the above values plotted by Excel:


I think that they match almost perfectly.

Hope this helps anyone doing VVT tuning!
Hi! why I cannot see the pictures of the first message? can anyone helpme please to find the stock fuel and ignition map of the 2ZZGE JDM please? Thanks in advance!
 
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