---===The Official MAFT-Pro Thread===---

[3000GT MR]

Originally Posted by TurboBob

---===The Official MAFT-Pro Thread===---


just a few posts back...

I run HKS 13G's

Bob

i think im a dumby. ever since i got my new computer and downloaded winzip all my files are messed up. it worked perfect on my old 1. but for some reason i cant D/L your bin into tune rt. im assuming i can do this without my laptop being plugged into the controler its self right? obveously to get the bin from my laptop to the controller it hasto be . but i just want the the bin on tune rt.. am i doing anything wrong? thanks Bob btw i must have missed it.

[venik]

you always say the car runs better with all trims at 81, I didn't even bother reinstalling my o2 sensors after putting new headers/o2 housings on. Would it be worth it to install 1 and get the trims to 81? that way I wouldnt be pulling fuel with the maftpro but the ecu. Which one does the ECU tune with, is it the front or rear?

my problem is probably due to my lack of tuning knowledge, but unless I'm cruising on a flat road my AFR isn't 14.7-8. If I'm cruising up hill I can see as low as 12.5, and even while engine braking I see 12.5 and it starts to buck. It's like I tuned the car to cruise only.
My mainscale is at -60.5 which lets me basically not touch the low load tune, cruise(on flat ground) at 14.7-15.1:1, and casually accel at 13.2-13.6:1. But there is a point when casually acceling that if you press the throttle past it, the car says no and I will see like 11.5 afrs
Are the mid loads coming into play while going up hill? Does map enrichment effect anything besides tip in?

Should I be messing with the VE table? Should VE table #2 be working for me?(td05 headers, 16gs, o2 housings, downpipe, 3 inch all the way back)

I'm using 4.85 or something, I'm going to try 5.03 when I have time.

[runner4053]

Originally Posted by venik

you always say the car runs better with all trims at 81, I didn't even bother reinstalling my o2 sensors after putting new headers/o2 housings on. Would it be worth it to install 1 and get the trims to 81? that way I wouldnt be pulling fuel with the maftpro but the ecu. Which one does the ECU tune with, is it the front or rear?

81 seems reasonable for high trim, but not for all trims. The ECU reads both 02 sensors, hence the two 02 sensors.

Originally Posted by venik

my problem is probably due to my lack of tuning knowledge, but unless I'm cruising on a flat road my AFR isn't 14.7-8. If I'm cruising up hill I can see as low as 12.5, and even while engine braking I see 12.5 and it starts to buck. It's like I tuned the car to cruise only.
My mainscale is at -60.5 which lets me basically not touch the low load tune, cruise(on flat ground) at 14.7-15.1:1, and casually accel at 13.2-13.6:1. But there is a point when casually acceling that if you press the throttle past it, the car says no and I will see like 11.5 afrs
Are the mid loads coming into play while going up hill? Does map enrichment effect anything besides tip in?


Should I be messing with the VE table? Should VE table #2 be working for me?(td05 headers, 16gs, o2 housings, downpipe, 3 inch all the way back)

I'm using 4.85 or something, I'm going to try 5.03 when I have time.

This is not like a SAFC. Use the VE table.

It sounds like your tune is really fucked up and you probably want to start over. You can't just use old VE tables when you mod your car. You especially can't use other people's tables. You need to tune and make your own VE table. Use someone else's to get your car running, and begin tuning immediately. That should take care of some of your issues. Also, I'm not sure what your doing by running without 02 sensors. I'm not familiar with that strategy.


BTW: My mainscale is about -60 and my car is in the low load part of the VE table all the time while cruising.

[1fastvr4]

Hey Bob,

If the key is turned on but the car is not running, what should the TPS say at no throttle and at full throttle?

Thanks,
Dean

[venik]

Originally Posted by 1fastvr4

Hey Bob,

If the key is turned on but the car is not running, what should the TPS say at no throttle and at full throttle?

Thanks,
Dean

between .5 and 1v at idle, 4.5-5volts at full throttle

Quote:
Originally Posted by venik View Post
you always say the car runs better with all trims at 81, I didn't even bother reinstalling my o2 sensors after putting new headers/o2 housings on. Would it be worth it to install 1 and get the trims to 81? that way I wouldnt be pulling fuel with the maftpro but the ecu. Which one does the ECU tune with, is it the front or rear?
81 seems reasonable for high trim, but not for all trims. The ECU reads both 02 sensors, hence the two 02 sensors.


Quote:
Originally Posted by venik View Post
my problem is probably due to my lack of tuning knowledge, but unless I'm cruising on a flat road my AFR isn't 14.7-8. If I'm cruising up hill I can see as low as 12.5, and even while engine braking I see 12.5 and it starts to buck. It's like I tuned the car to cruise only.
My mainscale is at -60.5 which lets me basically not touch the low load tune, cruise(on flat ground) at 14.7-15.1:1, and casually accel at 13.2-13.6:1. But there is a point when casually acceling that if you press the throttle past it, the car says no and I will see like 11.5 afrs
Are the mid loads coming into play while going up hill? Does map enrichment effect anything besides tip in?


Should I be messing with the VE table? Should VE table #2 be working for me?(td05 headers, 16gs, o2 housings, downpipe, 3 inch all the way back)

I'm using 4.85 or something, I'm going to try 5.03 when I have time.

This is not like a SAFC. Use the VE table.

It sounds like your tune is really fucked up and you probably want to start over. You can't just use old VE tables when you mod your car. You especially can't use other people's tables. You need to tune and make your own VE table. Use someone else's to get your car running, and begin tuning immediately. That should take care of some of your issues. Also, I'm not sure what your doing by running without 02 sensors. I'm not familiar with that strategy.


BTW: My mainscale is about -60 and my car is in the low load part of the VE table all the time while cruising.

my car is in low load while cruising, but most of my low load adjustments are at 0%, one or two points are at +-1%

disconnecting the o2 sensors means your hi/mid/low trims won't change, I.E. mine are all at 100 atm. And I'm 90% sure that one o2 sensor is just for datalogging and troubleshooting, and the other is what the ecu sees, if you think about it the ecu would have to do twice as much calculating with 2 inputs (while they are reading almost exactly the same reading which makes that counter productive), so it makes sense. Plus I've read it here on the boards.

I remember bob saying that VE tables should be left alone unless you know what you're doing. But that gives me some confidence in this f/c now...I think I could def perfect my tune in the next few days, only thing is its a bummer I need the laptop to mess with it. I especially like the new engine braking (?right?) variable in 5.03.

[runner4053]

Originally Posted by venik

between .5 and 1v at idle, 4.5-5volts at full throttle



my car is in low load while cruising, but most of my low load adjustments are at 0%, one or two points are at +-1%

disconnecting the o2 sensors means your hi/mid/low trims won't change, I.E. mine are all at 100 atm. And I'm 90% sure that one o2 sensor is just for datalogging and troubleshooting, and the other is what the ecu sees, if you think about it the ecu would have to do twice as much calculating with 2 inputs (while they are reading almost exactly the same reading which makes that counter productive), so it makes sense. Plus I've read it here on the boards.

I remember bob saying that VE tables should be left alone unless you know what you're doing. But that gives me some confidence in this f/c now...I think I could def perfect my tune in the next few days, only thing is its a bummer I need the laptop to mess with it. I especially like the new engine braking (?right?) variable in 5.03.

Okay. Well I think it's much easier to tune via VE table. I haven't touched this stuff in a year, but if you use that feature that tracks where you are in the VE table while playing a log, it's actually pretty easy. I used to try using the +- settings and couldn't brake out of the 13s in the quarter. I restarted with the VE table and pulled a 12.03 on a 100 degree day on pump gas with a lightly modded car at the time. That convinced me that VE is the way to tune.

So this 02 sensor thing...how do you stop the ECU from throwing a code? I'm really interested now. I've always had a hard time with my tune wandering.

[venik]

Originally Posted by runner4053

Okay. Well I think it's much easier to tune via VE table. I haven't touched this stuff in a year, but if you use that feature that tracks where you are in the VE table while playing a log, it's actually pretty easy. I used to try using the +- settings and couldn't brake out of the 13s in the quarter. I restarted with the VE table and pulled a 12.03 on a 100 degree day on pump gas with a lightly modded car at the time. That convinced me that VE is the way to tune.

So this 02 sensor thing...how do you stop the ECU from throwing a code? I'm really interested now. I've always had a hard time with my tune wandering.

I dont get any codes, but I'm obd1. Alot of people with maftpro do it though so maybe the answers somewhere in this thread. And thanks im gonna start tuning with the VE. I've got 16gs and the car doesnt feel too much faster than my 9b car yet, except that it doesn't heatsoak before I hit 100 mph lol.

[TurboBob]

Originally Posted by venik

you always say the car runs better with all trims at 81, I didn't even bother reinstalling my o2 sensors after putting new headers/o2 housings on. Would it be worth it to install 1 and get the trims to 81? that way I wouldnt be pulling fuel with the maftpro but the ecu. Which one does the ECU tune with, is it the front or rear?
[\QUOTE]

When I run with no O2s, I leave the trims at 100. When I am tuning with closed loop on, I tune so they run down to 81, and shoot for an O2 trim of 80 or so.

my problem is probably due to my lack of tuning knowledge, but unless I'm cruising on a flat road my AFR isn't 14.7-8. If I'm cruising up hill I can see as low as 12.5, and even while engine braking I see 12.5 and it starts to buck. It's like I tuned the car to cruise only.
My mainscale is at -60.5 which lets me basically not touch the low load tune, cruise(on flat ground) at 14.7-15.1:1, and casually accel at 13.2-13.6:1. But there is a point when casually acceling that if you press the throttle past it, the car says no and I will see like 11.5 afrs
Are the mid loads coming into play while going up hill? Does map enrichment effect anything besides tip in?

Should I be messing with the VE table? Should VE table #2 be working for me?(td05 headers, 16gs, o2 housings, downpipe, 3 inch all the way back)

I'm using 4.85 or something, I'm going to try 5.03 when I have time.

5.03 is similar to 4.8x, tip-in is smoother. The decel limiter is cool, but unnecessary if you are doing a full VE tune.

MAP enrichment is only right during tip-in. Mid tuning is centered at 0psi boost, so light to moderate accel is definately Mid.

VE table 2 should be close for part throttle driving, as it is affected by cams and heads more than turbos at part throttle.

Bob

[TurboBob]

Originally Posted by venik

I dont get any codes, but I'm obd1. Alot of people with maftpro do it though so maybe the answers somewhere in this thread. And thanks im gonna start tuning with the VE. I've got 16gs and the car doesnt feel too much faster than my 9b car yet, except that it doesn't heatsoak before I hit 100 mph lol.

VE tuning is not bad once tunerpro is configured.

Its really easy with a copilot. Flying solo, its do-able but more work.

Bob

[TurboBob]

Originally Posted by venik

disconnecting the o2 sensors means your hi/mid/low trims won't change, I.E. mine are all at 100 atm. And I'm 90% sure that one o2 sensor is just for datalogging and troubleshooting, and the other is what the ecu sees, if you think about it the ecu would have to do twice as much calculating with 2 inputs (while they are reading almost exactly the same reading which makes that counter productive), so it makes sense. Plus I've read it here on the boards.

the ecu uses both if it has them, as it wants to keep the afr going thru the pre-cats at 14.7