Interesting JWT discovery.
07-26-2005, 10:23 AM
#1
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Interesting JWT discovery.
For weeks now my car has been stinky rich at idle, especially when cold - and I was playing with the SAFC the other day.....
With the 370cc Injectors, A32 ECU and A32 MAF - if I change the Sensor Type on the AFC to Z32 MAF - it runs perfectly and even gives me a little more headroom before I start leaning out up top.....
Makes me think all JWT does when they program the 370cc Injector program is change the ECU's input for the MAF to Z32 Programming, "translating" the A32 MAF signal into lower signal output for the 370's to be controlled without too much richness.
Thus the reason it works so well with the AFC set to Z32 in/out.....because it IS Z32 in/out.
We all know that the Z32 MAF Naturally Asprirated + 370cc Injectors runs fine also....so that makes this even more interesting.
Just a theory, of course - but she's running great now and EGT's are perfect, peaking at about 1350 at full boost in 3rd gear.
With the 370cc Injectors, A32 ECU and A32 MAF - if I change the Sensor Type on the AFC to Z32 MAF - it runs perfectly and even gives me a little more headroom before I start leaning out up top.....
Makes me think all JWT does when they program the 370cc Injector program is change the ECU's input for the MAF to Z32 Programming, "translating" the A32 MAF signal into lower signal output for the 370's to be controlled without too much richness.
Thus the reason it works so well with the AFC set to Z32 in/out.....because it IS Z32 in/out.
We all know that the Z32 MAF Naturally Asprirated + 370cc Injectors runs fine also....so that makes this even more interesting.
Just a theory, of course - but she's running great now and EGT's are perfect, peaking at about 1350 at full boost in 3rd gear.
07-31-2005, 10:01 AM
#4
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New addition to my discovery.
I noticed after setting the A32 MAF + 370cc JWT Program to "Z32 Type" on my SAFC that I seemed to have some more top end.
I did a peak test on the AFC and now I'm hitting 100% airflow at 6800 RPM instead of 6000.....which means I'm not leaning out like I was before until I hit 6800 - thereby giving me more power.
Neat little trick for me since I can't seem to get the JWT MAF to work on my car.
I noticed after setting the A32 MAF + 370cc JWT Program to "Z32 Type" on my SAFC that I seemed to have some more top end.
I did a peak test on the AFC and now I'm hitting 100% airflow at 6800 RPM instead of 6000.....which means I'm not leaning out like I was before until I hit 6800 - thereby giving me more power.
Neat little trick for me since I can't seem to get the JWT MAF to work on my car.
07-31-2005, 04:39 PM
#6
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Originally Posted by iansw
New addition to my discovery.
I noticed after setting the A32 MAF + 370cc JWT Program to "Z32 Type" on my SAFC that I seemed to have some more top end.
I did a peak test on the AFC and now I'm hitting 100% airflow at 6800 RPM instead of 6000.....which means I'm not leaning out like I was before until I hit 6800 - thereby giving me more power.
Neat little trick for me since I can't seem to get the JWT MAF to work on my car.
I noticed after setting the A32 MAF + 370cc JWT Program to "Z32 Type" on my SAFC that I seemed to have some more top end.
I did a peak test on the AFC and now I'm hitting 100% airflow at 6800 RPM instead of 6000.....which means I'm not leaning out like I was before until I hit 6800 - thereby giving me more power.
Neat little trick for me since I can't seem to get the JWT MAF to work on my car.
07-31-2005, 05:58 PM
#7
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Oh - I also forgot to add that my EGT's are 100 degrees lower under full boost than they were. The voltage signal from the MAF starts lower at idle under the Z32 setting also - so it's not just a translated percentage thing.
LM-1 to be installed shortly.
LM-1 to be installed shortly.
07-31-2005, 06:14 PM
#8
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Originally Posted by iansw
Oh - I also forgot to add that my EGT's are 100 degrees lower under full boost than they were. The voltage signal from the MAF starts lower at idle under the Z32 setting also - so it's not just a translated percentage thing.
LM-1 to be installed shortly.
LM-1 to be installed shortly.
08-02-2005, 06:55 AM
#10
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Originally Posted by iansw
Yeah - I know a little bit about boost. 
<j/k>
I'll have more solid results of course when the LM-1 gets installed.
<j/k>I'll have more solid results of course when the LM-1 gets installed.
01-06-2006, 11:13 PM
#13
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Oh yeah - this was a while ago.
LM-1 monitoring proved I was smoking crack.
Got the Z32 MAF working a while ago (see stickies) - car hauls butt and is never rich at idle anymore.
LM-1 monitoring proved I was smoking crack.
Got the Z32 MAF working a while ago (see stickies) - car hauls butt and is never rich at idle anymore.
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