---===The Official MAFT-Pro Thread===--- - Page 35 - 3000GT/Stealth International Message Center

Barefoot · 10-18-2005, 11:47 AM

just in case you didnt know it was there..

ECU Tunning sub-forum of advanced tech

TurboBob · 10-18-2005, 12:59 PM

Quote:

Originally Posted by Rustang Cobra

...... i have to lower the start psi a little

www.people.umass.edu/dthornic/graph.jpg

What he means is that the overboost spike is intentional on his part and can easily be tuned out.....

Bob

Barefoot · 10-20-2005, 01:27 AM

i have a few more questions about datalogging/tunning...

what does afterstart enrichment do? (i run lean and my afr/rpm bounce around alot on cold start, would setting this help)

is the tune point set based on MAP? (if not, then what is it set on)

what does air temp correction do, and how would i use this to tune?

what does the VE table do and how owuld i go about tunning this?

also, does it seem odd that im running up to -35 correction on 450cc blacktop injectors?

Thanks!

ldcarson · 10-20-2005, 08:34 AM

yeah we should get this thread moved to the new ECU tuning subforum. We are trying to get all of the tunning related threads into this new sub forum. Not sure if Mod has to do it or If originator can...

TurboBob · 10-20-2005, 09:03 AM

That seems like a lot of correction. I hope to put my 450's in next week, so I can try it here....

Afterstart enrichment adds some fuel for a short while (minutes if idling, shorter if driving) to handle lean startup issues that the mitsubishi's seem to have. I usually run between 10 and 15% afterstart

Airtemp correction is in addition to the air temp calculations that the Speed Density algorithm has. At the temperature extremes, evaporation, atomization, and other details affect the accuracy of the speed density calculation. If you find that at certain air temperatures your trims are shifted, you can correct it here.

the VE table is the main component of the Speed Density calculation and directly affects how much fuel is delivered. You can edit this table for very fine control over the tune. Best done carefully with lots of datalogging. Most guys don't need to bother with this though, since the regular "User Tunes" work very well.

The tune setpoints are scaled in KPA, from the MAP sensor

Bob

bazooka614 · 10-21-2005, 08:00 PM

I have a 1994... Can I use speed density if I dont have a MAP sensor.

Jeremy C · 10-21-2005, 08:14 PM

Quote:

Originally Posted by bazooka614

I have a 1994... Can I use speed density if I dont have a MAP sensor.

You need the GM map sensor and it will work just fine.

bazooka614 · 10-21-2005, 10:39 PM

will i still be able to tune using low mid and hi like with the safc setting?

TurboBob · 10-21-2005, 11:09 PM

yes, works very well.

bazooka614 · 10-22-2005, 02:49 PM

Does the Maft Pro have timing control yet??? also If I am going to use speed density do I still need the GM MAS. Lastly being that Ill be using the GM IAT what will I be doing with the baro?

10-18-2005, 11:47 AM	#341 (permalink)
Barefoot Racing Join Date: Jan 2003 Location: Ga Tech Drives: 92R/T - converted ;) Trader Rating: (31)	Re: ---===The Official MAFT-Pro Thread===--- just in case you didnt know it was there.. ECU Tunning sub-forum of advanced tech __________________ 92 Dodge Stealth R/T AWD/TT (TD05) converted ( 11.894 @ 120.56 - 18 psi -> Video )

10-20-2005, 01:27 AM	#343 (permalink)
Barefoot Racing Join Date: Jan 2003 Location: Ga Tech Drives: 92R/T - converted ;) Trader Rating: (31)	Re: ---===The Official MAFT-Pro Thread===--- i have a few more questions about datalogging/tunning... what does afterstart enrichment do? (i run lean and my afr/rpm bounce around alot on cold start, would setting this help) is the tune point set based on MAP? (if not, then what is it set on) what does air temp correction do, and how would i use this to tune? what does the VE table do and how owuld i go about tunning this? also, does it seem odd that im running up to -35 correction on 450cc blacktop injectors? Thanks!

10-20-2005, 08:34 AM	#344 (permalink)
ldcarson Forum user Join Date: Sep 2003 Location: South Central IRAQ! Drives: 98SOHC SDS/95VR-4 Trader Rating: (27)	Re: ---===The Official MAFT-Pro Thread===--- yeah we should get this thread moved to the new ECU tuning subforum. We are trying to get all of the tunning related threads into this new sub forum. Not sure if Mod has to do it or If originator can...

10-20-2005, 09:03 AM	#345 (permalink)
TurboBob Resident mad scientist Join Date: Jan 2003 Location: Near Detroit Drives: 86 GN 91 RT/TT Trader Rating: (17)	Re: ---===The Official MAFT-Pro Thread===--- That seems like a lot of correction. I hope to put my 450's in next week, so I can try it here.... Afterstart enrichment adds some fuel for a short while (minutes if idling, shorter if driving) to handle lean startup issues that the mitsubishi's seem to have. I usually run between 10 and 15% afterstart Airtemp correction is in addition to the air temp calculations that the Speed Density algorithm has. At the temperature extremes, evaporation, atomization, and other details affect the accuracy of the speed density calculation. If you find that at certain air temperatures your trims are shifted, you can correct it here. the VE table is the main component of the Speed Density calculation and directly affects how much fuel is delivered. You can edit this table for very fine control over the tune. Best done carefully with lots of datalogging. Most guys don't need to bother with this though, since the regular "User Tunes" work very well. The tune setpoints are scaled in KPA, from the MAP sensor Bob

10-21-2005, 08:00 PM	#346 (permalink)
bazooka614 Supercharged SL Join Date: Aug 2004 Location: New York Drives: 1994 3000GT SL Trader Rating: (0)	Re: ---===The Official MAFT-Pro Thread===--- I have a 1994... Can I use speed density if I dont have a MAP sensor. __________________ 1994 3000GT SL // Vortech V-5 G-Trim // Stock Internals-6Psi// Fidanza Flywheel, 6 Puck Ceramic Clutch, Addco Front Sway, JIC FLA-2 Race Coilovers, Koyo Radiator, Flexalite Fans, 3SX Polyurethane Mounts (Front and Rear)....Traction Pending

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10-21-2005, 10:39 PM	#348 (permalink)
bazooka614 Supercharged SL Join Date: Aug 2004 Location: New York Drives: 1994 3000GT SL Trader Rating: (0)	Re: ---===The Official MAFT-Pro Thread===--- will i still be able to tune using low mid and hi like with the safc setting?

10-21-2005, 11:09 PM	#349 (permalink)
TurboBob Resident mad scientist Join Date: Jan 2003 Location: Near Detroit Drives: 86 GN 91 RT/TT Trader Rating: (17)	Re: ---===The Official MAFT-Pro Thread===--- yes, works very well.

10-22-2005, 02:49 PM	#350 (permalink)
bazooka614 Supercharged SL Join Date: Aug 2004 Location: New York Drives: 1994 3000GT SL Trader Rating: (0)	Re: ---===The Official MAFT-Pro Thread===--- Does the Maft Pro have timing control yet??? also If I am going to use speed density do I still need the GM MAS. Lastly being that Ill be using the GM IAT what will I be doing with the baro?

LinkBacks (?) LinkBack to this Thread: http://www.3si.org/forum/f103/official-maft-pro-thread-290438/
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HOW TO INSTALL MAFTPRO ON A 91-99 3000GT VR4/91-96 STEALTH TT	This thread	Refback	04-13-2008 01:45 AM