Has anyone experimented with Cosmo or 929 AFM's
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Seduced by the DARK SIDE
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From: Orange Park FL (near Jax)
Has anyone experimented with Cosmo or 929 AFM's?
I'm too cheap to go stand alone, so what about a bigger AFM?
Any tricks to using a Cosmo or 929 AFM?
Any tricks to using a Cosmo or 929 AFM?
Last edited by SureShot; Feb 7, 2006 at 08:46 AM.
Thread Starter
Seduced by the DARK SIDE
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From: Orange Park FL (near Jax)
Originally Posted by BklynRX7
This might be entirelt wrong but what about just swapping in a stiffer spring and changing injectors?
The 929 & Cosmo AFM's flow more, with less pressure drop.
Anyway, I bought one on e-bay.
I'll be experimenting with it in a couple weeks.
Hopefully it will be manageable with the S-AFC.
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Seduced by the DARK SIDE
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From: Orange Park FL (near Jax)
Originally Posted by evileagle
Spend the $650 on a MAPECU and ditch the AFM altogether. 
The bigger AFM is $33 shipped.
I'll post the results in this thread.
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From: Ottawa, canada
^^^ that maf looks like a VAF from a mx-3/mx-6/probe/626, they all look the same but are calibrated differently. An mx-3 VAF (vein airflow sensor) has JE50 on the label, this vaf is also used on a KLZE engine (200hp stock) in japan.
I dont think using one of those would help flow at all. They are only 2.5inch on one side and 3.5inch on the other, but theres a giant plunger inside and it doesnt look like it'd flow a ton of air. My FC is missing its maf so i havnt really looked at it at all to see if the VAF would be an improvment but i'm picking up my S4 harness maf and sensors this week so i'll let you guys know.
One thing im not sure of is the difference between a MAF and a VAF, do they measure air the same way? I know on talons and mustangs they can get blow through MAF's that basically dont restrict the air at all. Is there anything like that for FC's?
I dont think using one of those would help flow at all. They are only 2.5inch on one side and 3.5inch on the other, but theres a giant plunger inside and it doesnt look like it'd flow a ton of air. My FC is missing its maf so i havnt really looked at it at all to see if the VAF would be an improvment but i'm picking up my S4 harness maf and sensors this week so i'll let you guys know.
One thing im not sure of is the difference between a MAF and a VAF, do they measure air the same way? I know on talons and mustangs they can get blow through MAF's that basically dont restrict the air at all. Is there anything like that for FC's?
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Thread Starter
Seduced by the DARK SIDE
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From: Orange Park FL (near Jax)
All the 2nd gens are flap (or vane) type.
The Stangs are hot wire type.
The 3rd gens have no air flow sensor, they use the MAP, TPS & tach to compute flow.
The Stangs are hot wire type.
The 3rd gens have no air flow sensor, they use the MAP, TPS & tach to compute flow.
Thread Starter
Seduced by the DARK SIDE
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From: Orange Park FL (near Jax)
NICE - I installed it last night.
Start up & run - no sweat.
Fuel immediately went 40% rich.
To get back to 14/1 AFR, I had to set the S-AFC low map to -50% on all points.
Pictures & G-tech HP test to come.
Start up & run - no sweat.
Fuel immediately went 40% rich.
To get back to 14/1 AFR, I had to set the S-AFC low map to -50% on all points.
Pictures & G-tech HP test to come.
Thread Starter
Seduced by the DARK SIDE
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From: Orange Park FL (near Jax)
Just an update:
The 929 AFM works, BUT the stroke goes to 100% at only 2500-3K RPM depending on boost.
The Cosmo N390 should do better - if I can find one..
The 929 AFM works, BUT the stroke goes to 100% at only 2500-3K RPM depending on boost.
The Cosmo N390 should do better - if I can find one..
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From: San Jose, CA
Originally Posted by arghx
wasn't there like a 20 page thread on this
Former Moderator. RIP Icemark.
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From: Rohnert Park CA
Originally Posted by arghx
wasn't there like a 20 page thread on this
Wait, let me find sureshots exact words (since he started the other thread on this too, and revived this one today):
To: Ted - Aaron – Mark - and all others who followed this thread.
After more testing: NO HIGH END gains. (embarrassing admission)
I was really faked out since the inlet & outlet were bigger, & the vane's larger area made it depress easier.
Low end pressure drop is less, and low end performance is better, BUT you hit a wall of pressure drop at 5K when the vane hits max.
There is an optical illusion inside that makes the max bore diameter look bigger that it actually is.
The max bore is exactly the same on the 929 AFM as the S5 AFM!
Same bore – bigger vane – that explains the increased air signal giving more fuel and needing –40% on the S-AFC.
There might be some benefit in a stock S5 NA with an S-AFC, but the turbo needs more top end flow.
I’m sorry it took me a week to sort it out.
After more testing: NO HIGH END gains. (embarrassing admission)
I was really faked out since the inlet & outlet were bigger, & the vane's larger area made it depress easier.
Low end pressure drop is less, and low end performance is better, BUT you hit a wall of pressure drop at 5K when the vane hits max.
There is an optical illusion inside that makes the max bore diameter look bigger that it actually is.
The max bore is exactly the same on the 929 AFM as the S5 AFM!
Same bore – bigger vane – that explains the increased air signal giving more fuel and needing –40% on the S-AFC.
There might be some benefit in a stock S5 NA with an S-AFC, but the turbo needs more top end flow.
I’m sorry it took me a week to sort it out.
IT DOES NOT FLOW ANY BETTER BECAUSE THE CONE/***** IS BIGGER.
In fact it was covered that with the bigger cone in the middle that there was increased turbulance because now you have a bigger ***** in the middle of the air path.
The only way you could get a true increase, is that the cone in the middle stays the same size, but the outside diameter increases.
I should close this thread now. Is there any reason what so ever that it should remain open???
Last edited by Icemark; Apr 26, 2006 at 11:12 PM.
Thread Starter
Seduced by the DARK SIDE
Joined: Apr 2001
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From: Orange Park FL (near Jax)
The 929 AFM is one of those "you can make it work in an emergency" things, but you gain no performance.
Now - for my next wild goose chase - I'm experimenting with a 13BRE Cosmo AFM (N390).
Now - for my next wild goose chase - I'm experimenting with a 13BRE Cosmo AFM (N390).
Last edited by SureShot; May 1, 2006 at 08:09 AM.
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