is there any way to use these maps with an AP? I don't know anything about tuning or which format that each system uses.....?

 

Yes, through AccessTuner Race. All the tables in ATR are identical to EcuFlash. You'll just have to copy each value into the appropriate box.

 

Sweet! But would using these MIVEC maps affect the existing A/F or boost in any drastic way?

 

I don't know, I haven't tried copying over the maps yet I don't know if they're better or worse than the MIVEC maps already on the Stage 2 map in the AP.

 

Thats exactly what I`m thinking! I`m running Cobb stage 2 custom tuned and haven`t compared the values yet. Although I`ve hard that AP Mivec map is based on JDM version.

Keep me posted of your findings, I will have to do some reconciliation later.

 

I thought I might be able to copy them like that, but I wasn't sure.

 

I see the X-axis and Y-axis are reversed between ATR and Ecuflash MIVEC maps. It will take quite some time to convert and copy the map over.

Does anyone know if the Cobb MIVEC map is any better than the JDM MIVEC?

 

well forget that then... I already don't know what i'm doing lol.

 

Yeah they're reversed. You'd have to go across a row on the EcuFlash map and enter those values down the appropriate column on the ATR map.

 

I really should probably study this stuff and get better with it... but I get sooooo obsessed with stuff like that and constantly trying to make it better that it drives me nuts.

 

You can alter; e.g. edit the EcuFlash parameters to swap the axis. For example, right click the "MIVEC Intake #1" and select "Edit Map" Note the X & Y axis, address, name, etc and reverse them.

 

The 3D maps are great for details but sometimes simplifying things can make them more readable by just plotting the load path your car takes through the map. The low end RPM range will be different depending on how laggy your turbo is but the mid and upper RPM range tends to be very similar at 200%-320% load no matter what turbo you have. Here are the maps in a simple table format for a 2000-8000 rpm WOT pull. I grouped the RPM's into 3 phases: Low, Mid, and High RPM's.

Hiboost Stock Turbo Mivec
---------Intake----Exhaust----Overlap
2000 --- 30 -------- -20 --------- 50
2500 --- 30 -------- -20 --------- 50
3000 --- 30 -------- -15 --------- 45
3500 --- 30 -------- -10 --------- 40

4000 --- 25 --------- -5 ---------- 30
4500 --- 25 ---------- 0 ---------- 25
5000 --- 25 ---------- 0 ---------- 25
5500 --- 25 ---------- 0 ---------- 25
6000 --- 20 ---------- 0 ---------- 20

6500 --- 15 ---------- 0 ---------- 15
7000 --- 10 ---------- 0 ---------- 10
7500 --- 10 ---------- 0 ---------- 10
8000 --- 10 ---------- 0 ---------- 10

Overlap is just a way to check in Mivec degrees how much relative overlap there is. The JDM maps had 45 tapering to 30 in the low RPM's and 25-30 in the mid and upper RPM's as reference.

Here are the general RPM ranges these effects would apply:

2000 Increase overlap (retard exhaust, advance intake): Sharper (higher) power/torque peaks, narrower powerband, Higher EGT, Great for spoolup
2500
3000
3500 Advance centerline (both cams): powerband moves to lower RPM

4000
4500
5000 Decrease overlap: (advance exhaust, retard intake intake): Flatter power/torque peaks, broader powerband, Lower EGT
5500
6000

6500 Retard centerline (both cams): powerband moves to higher RPM
7000
7500
8000

Here is the map that gained me some power on a Larger than stock turbo:

Hiboost GT30 Turbo Mivec
---------Intake----Exhaust----Overlap
2000 --- 30 -------- -20 --------- 50
2500 --- 30 -------- -20 --------- 50
3000 --- 30 -------- -15 --------- 45
3500 --- 30 -------- -10 --------- 40

4000 --- 25 --------- -5 ---------- 30
4500 --- 25 ---------- 0 ---------- 25
5000 --- 25 ---------- 0 ---------- 25
5500 --- 25 ---------- 0 ---------- 25
6000 --- 20 --------- -5 ---------- 25

6500 --- 15 -------- -10 --------- 25
7000 --- 10 -------- -10 --------- 20
7500 --- 10 -------- -10 --------- 20
8000 --- 10 -------- -10 --------- 20

This map gained me some power from 6000-8000 over my other map. Adding an extra -5 exhaust retard from 5500-8000 lost power again so it seems to be about in the sweet spot +- a few degrees. I also tested reducing intake advance by 5 degrees starting at 4500 and it also lost power.

My next test will be adding 5 degrees of intake advance from 3000-7000 to see if any RPM points have any gains. This map will be closer to what "BigT" was testing so we'll see if the larger turbo gains any HP from it.

Hiboost GT30 Turbo Mivec - Testing Advanced Intake
---------Intake----Exhaust----Overlap
2000 --- 30 -------- -20 --------- 50
2500 --- 30 -------- -20 --------- 50
3000 --- 35 -------- -15 --------- 50
3500 --- 35 -------- -10 --------- 45

4000 --- 30 --------- -5 ---------- 35
4500 --- 30 ---------- 0 ---------- 30
5000 --- 30 ---------- 0 ---------- 30
5500 --- 30 ---------- 0 ---------- 30
6000 --- 25 --------- -5 ---------- 30

6500 --- 20 -------- -10 --------- 30
7000 --- 15 -------- -10 --------- 25
7500 --- 10 -------- -10 --------- 20
8000 --- 10 -------- -10 --------- 20

If anyone wants to test this last map out on a FP Red/Dom2/GT30 turbo I would be interested in your results as well.

 

^


Thats a great explanation hiboost. Thanks for that. Now i just need to read it a few times lol!

 

Hiboost, I was comparing your MIVEC maps to Gunzo's 91oct ROM hex file MIVEC maps (found in Evoxforums tuning section) and it looks like yours has more modifications compared to his (can't distinguish which one has more aggressive settings). I based this by examing the factory/stock ROM hex file.

Got a couple of followup questions:
1.) How does your your MIVEC maps compare to Gunzo's modified JDM map on a stock EvoX (w/ Perrin dropin foam filter)? I'm looking for a smoother power band with max oomph in the 2500-4500 RPM range.

2.) If your maps do have the settings I'm looking for, is it safe to copy-paste your MIVEC maps to Gunzo's ROM and run it on my stock X?

-edit- I don't have a WB, but will have a Evoscan for logging once my tactrix cable arrives.

Thanks in advance!

 

Don't go doing a dang thing without a wideband. Easy way to make things go boom.

That said the maps posted here do add power from the lower band on up. Enough that you can tell in a properly tuned car between the JDM maps and these.