Is replacing the MAF really worth it?
09-11-2006, 11:02 AM
#1
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Is replacing the MAF really worth it?
Hey all!
Thinking about biting the bullet and getting a newer less restrictive MAF. But I have questions:
For those at higher altitudes (5,000 feet+), when you replaced your MAF, did you notice any difference?
Is there a significant enough gain to justify replacement?
Thanks!
Thinking about biting the bullet and getting a newer less restrictive MAF. But I have questions:
For those at higher altitudes (5,000 feet+), when you replaced your MAF, did you notice any difference?
Is there a significant enough gain to justify replacement?
Thanks!
09-12-2006, 08:56 AM
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Finished modifying my MAF. More air is a good thing! I had to re-tune my S-AFC and add more fuel. Feels good though. Better throttle response and slightly snappier acceleration. The whole project took me about 4 hours. Most of that time was spent waiting for the paint to dry. If I hadn't waited for the paint, it would have been finished in a little over an hour.
Click on thumbs for fullsize pics:
Complete write-up here:
http://www.haveblueonline.com/engine/MAF.htm
Click on thumbs for fullsize pics:
Complete write-up here:
http://www.haveblueonline.com/engine/MAF.htm
09-12-2006, 09:20 AM
#7
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Nice job Alan! Sorry I didn't get here earlier, but to answer this from the other thread:No. 
You've basically created the Supra MAF. The remaining difference is that the vane in the Supra is less restrictive, but in general you've accomplished the same thing for a lot less $$$.
Well done.
You've basically created the Supra MAF. The remaining difference is that the vane in the Supra is less restrictive, but in general you've accomplished the same thing for a lot less $$$.
Well done.
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09-12-2006, 11:33 AM
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if you have a piggy back control you can even get a newer v6 maf such as the 3mz unit as they have drop in mafs without a casing like you see. This way you can make your own tubing.
Just dont forget that the larger the tubing the more out of whack the maf will be due to the fact that larger tube = larger volume = less airspeed for the same flow = ecu gets confused and under fuels.
Just dont forget that the larger the tubing the more out of whack the maf will be due to the fact that larger tube = larger volume = less airspeed for the same flow = ecu gets confused and under fuels.
09-21-2006, 11:11 PM
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Finished modifying my MAF. More air is a good thing! I had to re-tune my S-AFC and add more fuel. Feels good though. Better throttle response and slightly snappier acceleration. The whole project took me about 4 hours. Most of that time was spent waiting for the paint to dry. If I hadn't waited for the paint, it would have been finished in a little over an hour.
Click on thumbs for fullsize pics:
Complete write-up here:
http://www.haveblueonline.com/engine/MAF.htm
Click on thumbs for fullsize pics:
Complete write-up here:
http://www.haveblueonline.com/engine/MAF.htm
Did you notice any kind of gains on this mod? I was wondering if this is something looking into. Thanks buddy!
09-22-2006, 01:50 AM
#15
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"Feels good though. Better throttle response and slightly snappier acceleration."
I run a Supra MAF on my truck and have the same general opinion. In addition, it cleared up a weird dip I had in acceleration around 2500-3000 RPM.
09-22-2006, 07:25 AM
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Running a supra maf on a s/c engine should be a must....if you have the smt6 you will notice that the s/c brings you to the upper 90's % range of the stock maf, with cams your wide open. As soon as i went to a supra maf i am (was 
) at 70-80% open on that. You get alot better response and more power.
I wonder what i will do for n/a i left the supra maf in when i removed the s/c.
) at 70-80% open on that. You get alot better response and more power.I wonder what i will do for n/a
i left the supra maf in when i removed the s/c.
09-22-2006, 08:07 AM
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unless you have a s/c along with the fipk and no fuel mods you are nowhere near being under fueled...there is a reason i kept the stock injectors in my 5vz swap into my mr2 which will be hitting 7000rpm. They are fairly large injectors and have more then enough room for some N/A upgrades.
Right now with cams and larger maf i hope to tune some timing around and see what i can come up with.
Right now with cams and larger maf i hope to tune some timing around and see what i can come up with.
09-27-2006, 09:27 AM
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That makes sense, I guess what I was really saying was while going up hill with a heavy load I had some pinging. I was inadvertently relating this to lack of fuel when it could have been about 10 other variables. I wish I had thought to turn up the ECT pot and see what that would do. I usually adjust that BEFORE I get into that type of situation. I'am at 4500ft...would this be even more reason to mod the MAF?
09-27-2006, 10:24 AM
#20
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Yes... the more air you can get into your engine the better.
There're a couple of charts around here where people have noted how the air density goes down as elevation increases. Bottom line, you're running thinner than sea level, but of course not as bad as folks at 9,000 feet. Anything you can do to get more air is good... as long as you can supply the fuel to match the added air flow. But, at 4500 feet, you could do anything short of adding a S/C or Turbo and he stock fuel system will be fine. The point being that you're starved for air now, the fuel system is just waiting.
There're a couple of charts around here where people have noted how the air density goes down as elevation increases. Bottom line, you're running thinner than sea level, but of course not as bad as folks at 9,000 feet. Anything you can do to get more air is good... as long as you can supply the fuel to match the added air flow. But, at 4500 feet, you could do anything short of adding a S/C or Turbo and he stock fuel system will be fine. The point being that you're starved for air now, the fuel system is just waiting.
