ARe there aftermarket AFM's?
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yeah you can use just about any aftermarket or stock AFM out there. as long as you get a computer (i.e. haltech) to run it. there arent any stock chages you can make as far as i know. the S5's are different and flow more than s4 but i dont think they are interchangeable at all
Justin
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just talking out of my *** here, i dunno how or if its possible, but if you are good with electronics you *MIGHT* be able to wire in a less restrictive mass air unit from another car. like i said, im talking off the top of my head, i dont know if it could work.
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well, you can do it with some kind of conversion circuit but who has the time or energy to design one? What would one of these be worth? I have all the brains and more resident electrical engineering people than you could wave a stick at (huge part of my school is EE) who would think this was a paultry test of designing circuits to make one for me. But if I were to produce them what would the market sustain as far as price? Granted I have my own reasons for making the swap, but for the cost of the S5 AFM I could build a megasquirt and be using a MAP sensor eliminating the entire unit from the airflow.... not to mention perfect fuel maps and ultimate tunability.
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Originally posted by RX-7Impreza
yeah you can use just about any aftermarket or stock AFM out there. as long as you get a computer (i.e. haltech) to run it. there arent any stock chages you can make as far as i know. the S5's are different and flow more than s4 but i dont think they are interchangeable at all
Justin
yeah you can use just about any aftermarket or stock AFM out there. as long as you get a computer (i.e. haltech) to run it. there arent any stock chages you can make as far as i know. the S5's are different and flow more than s4 but i dont think they are interchangeable at all
Justin
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Originally posted by RX-7Impreza
you can use just about any aftermarket or stock AFM out there. as long as you get a computer (i.e. haltech) to run it.
you can use just about any aftermarket or stock AFM out there. as long as you get a computer (i.e. haltech) to run it.
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the haltech can usa a maf too, i have no idea why you would want too....
mike
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Originally posted by j9fd3s
the haltech can usa a maf too, i have no idea why you would want too....
mike
the haltech can usa a maf too, i have no idea why you would want too....
mike
'cause then you don't have to retune every time you change the VE of the engine (such as adding intake/exhaust, etc)
Henrik
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You'd want to re-tune every time you change anything on the engine. Are we not aware what programable ecu's are for? It's to get the MOST out of the engine. When you change something you can go back and maximize the programing for it.
As for using the S-Afc to run a different afm... I wouldn't do it. The resistance values are different so that the flow readings would be off under all driving conditions. You'd need a stand alone to make it work right, or else you could really only tune it for a set rpm and throttle position.
How much for a cosmo afm?
As for using the S-Afc to run a different afm... I wouldn't do it. The resistance values are different so that the flow readings would be off under all driving conditions. You'd need a stand alone to make it work right, or else you could really only tune it for a set rpm and throttle position.
How much for a cosmo afm?
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*note* the only AFM's that MIGHT be bigger, are the cosmos'.
I've never even SEEN a cosmo AFM (blocks don't come with AFM's) so it could be the exact same as a S5 TII's or whatnot.
I've never even SEEN a cosmo AFM (blocks don't come with AFM's) so it could be the exact same as a S5 TII's or whatnot.
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the S5 AFM might read across a larger range or a different mixture, but take one look at it and tell me that bullet isn't a huge airflow restriction. I believe the S4 AFM is superior bc of it's apparently better flow characteristics and the ability to play with them (crude tuning w/ the spring inside provided you have an EGT gauge). anyone notice any kind of performance increase w an S5 AFM on an S4 NA?? power? gas mileage?
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I hit 61% on my s-afc today. That is completely maxing the flapper door on the afm. (because when you hold it wide open thats what she reads) If I had access to a S5 I'd throw it in to see if it changed anything.
The resistance differences are big enough to require correction, but could be small enough to still function.
The resistance differences are big enough to require correction, but could be small enough to still function.
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Originally posted by Jimmy325i
You'd want to re-tune every time you change anything on the engine. Are we not aware what programable ecu's are for? It's to get the MOST out of the engine. When you change something you can go back and maximize the programing for it.
You'd want to re-tune every time you change anything on the engine. Are we not aware what programable ecu's are for? It's to get the MOST out of the engine. When you change something you can go back and maximize the programing for it.
As for using the S-Afc to run a different afm... I wouldn't do it. The resistance values are different so that the flow readings would be off under all driving conditions. You'd need a stand alone to make it work right, or else you could really only tune it for a set rpm and throttle position.
#24
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Originally posted by cbrock
What about a VPC??? DSM guys use those all the time. Gets rid of the AFM and uses speed density, I believe.
What about a VPC??? DSM guys use those all the time. Gets rid of the AFM and uses speed density, I believe.
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Originally posted by Rotorific
Speed density isnt all that great but it could work with alot of work that probally wouldnt be worth the while.
Speed density isnt all that great but it could work with alot of work that probally wouldnt be worth the while.