Afm Thru Intercooler

[linedup33]

hey all just wondering if i could run my afm through my intercooler piping?

any advice would be awesome.

thanks in advance.

[Adriano]

Yes, absolutely can, and if you mount it after the BOV it will stop the stalling on gearchanges(you will need to mount it after the BOV, or it will measure the recirculated air)What management are you running? Will need to check mixtures obviously, would love too hear back on how you go.

[linedup33]

ive just got a safc 2 thats the onli management ive got..im running a fairly stock setup, except for fuel pump, fmic n split dump pipe.

[R31Nismoid]

If thats the setup, then i see little point in doing it.

Whats your reason/problem your trying to fix?

[Adriano]

If thats the setup, then i see little point in doing it.

Whats your reason/problem your trying to fix?

Yeah, putting the AFM in the ic piping, will not increase its power abilities, it will still max out at the same airflow.

[linedup33]

nah no reason ash

will it cause any damage? so itll b the same as runing after the turbo?

[abu]

At least that way he can run a metal intake pipe off the turbo, instead of having to make something to compensate for the AFM... although its not that hard to do.

Only advantage I can see, but you will still be left with no way to plum back all the stock plum back gear.

Its easy done on a RB30ET as there is no plum back gear or BOV, but different story on the RB20/25's obviously..

Might as well just leave it how it is man, works well anyways.. just more work cutting the cooler piping to do it this way, without any benefits, if any at all..

Thanks,

Abu

[linedup33]

abu couldnt i just take the afm off after the turbo n put the pod straight onto the rubber intake pipe?

i currently have 2 afm in my car; one afm in between the intercooler pipes so no cutting needed - but its just not plugged in, n the other one after the turbo which is plugged in.

[abu]

abu couldnt i just take the afm off after the turbo n put the pod straight onto the rubber intake pipe?

i currently have 2 afm in my car; one afm in between the intercooler pipes so no cutting needed - but its just not plugged in, n the other one after the turbo which is plugged in.

Yeah man you could do that! You got this all set up already ey lol

Sounds exactly like the setup I had on my VL Turbo, 2x AFM's, 1 on the cooler piping and the other on the dummy air-box to the turbo, which wasn't hooked up, and a metal dose pipe off the turbo lol

Umm yeah you could just take the AFM off the rubber intake pipe and put the pod filter straight onto that..

Can I ask why your doing this though? That will pretty much work the same as if you had it on there, no change in sound etc..

Only thing I would do is run the AFM in the cooler piping, remove the plum back pipe altogether, block off the BOV, run a catch can for the breathers on the rocker cover and run a steel 3" pipe off the turbo with a pod filter to make it spool and dose loud..

Thanks,

Abu

[linedup33]

the reason im doing this is coz theres a few dudes who wana buy an afm n i need the cash bad nowadays lol n no point in me having 2 if i could i just run one..ive got a catch can sitting in my engine bay just need to hook it up, im not keen on blocking my bov is there another way that i could run that setup?

[abu]

the reason im doing this is coz theres a few dudes who wana buy an afm n i need the cash bad nowadays lol n no point in me having 2 if i could i just run one..ive got a catch can sitting in my engine bay just need to hook it up, im not keen on blocking my bov is there another way that i could run that setup?

Oh ok fair enough.

Just run the stock intake pipe to the turbo then. Remove the AFM off the rubber pipe and put the pod filter onto it.

That will fix your problem!

Thanks,

Abu

[linedup33]

thanks abu, how would i go about hooking up the catch can, n will it dose or will i need a steel intake pipe?

[abu]

thanks abu, how would i go about hooking up the catch can, n will it dose or will i need a steel intake pipe?

Not a problem.

Catch can I am not 100% sure on so I will not comment, I'l leave that to someone who knows what they are talking about entirely..

As far as the dose goes, the rubber pipe with no AFM will give you that same sort of filter flutter! You will defiantly need to go to a steel intake pipe, so the compressor surge echo's, giving you a nice dose.

The shorter the pipe, the more pitched the dose will be, the longer the pipe, the longer the duration of dose, but the less pitch.

Thanks,

Abu

Edited July 12, 2007 by abu

[mad082]

the downside i see of putting it in the piping is that if you have a slight leak in the front seal of the turbo you will have to clean the afm every few weeks to make sure it is reading correctly.

[linedup33]

i have it after the intercooler pipe that come from the crossover pipe, could that still happen?

[Pauly33GTS-t]

Hold one one freaking second...

If I have the AFM setup after the BOV in-line with the intercooler piping with my current mods, will I stop stalling issues related to the Blow off valve being blocked/Aftermarket blitz blow off valve?

This is important question, thanks.

I am aware also if you do this, you must keep the Pod in the same position as it could pose problems closer to the turbo inlet (have a piece of pipe the length of the AFM to keep the pod filter in the same location.

[GeeTR]

^^^ Yah it will, as the AFM isnt seeing movement due to BOV when you back off.

Also should stop the "pulsing" some get when their AFM(s) are to close to the turbo compressor.

Apart from wanting to do it, because you can make some $$ i reckon go for it, document your success / failure, and hopefully u don't blow a motor lol

Theres many thread on this, mostly speculation and ppl who have "mates" who have set it up.

Theres quiet a comprehensive thread on oil / air separators

How...

PCV

Another

Another

Another

Another

Another

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Edited July 16, 2007 by GeeTR

[linedup33]

thanks mick i was gonna do it 2day but now u got me worried with the dont blow ur motor line

[GeeTR]

thanks mick i was gonna do it 2day but now u got me worried with the don't blow ur motor line

Well, you are messing with one of the major inputs that the ECU uses for fuel delivery calcs. Fore mentioned turbo oil leak could wreck havoc with the hotwire. Dont want to put you off, just need to make sure you pay attention and realize its a serious change

A wide band up its bum would alleviate some of the stress for sure.

[msports180]

i was going to do this with my 34 as i couldnt run a long enough inlet tract to avoid reversion through the airflow meter. I was told of a few positive's and a few negative's.

The positives being no reversion throught the AFM, so if your running a bigger turbo you should get beter response on/off the throttle and should stop the stalling when coming to a stop (for those that dont know what reversion it is, its the noise you hear from your pod filter when u back off, the flutter sound. its the air coming back up from the compressor of the turbo. This can cause the afm to read more air and hence ritchen up the mixture, cough fart stop)

The second positive being less restriction before the turbo so you may get some free power.

Now the negative's, the first im not completely sure as i have not been able to test it back to back. I have been told if you run the AFM after the intercooler you may have some mixture problems. As the air is denser coming back from the intercooler. The pressure makes no diffrence as its still the same volume of air but the density may affect it. As i said i have not been able to run a car with the AFM before the turbo then put it into the FMIC piping back to back to test this.

The second negative is that as someone else mentioned, any crap going through your breather system is going to end up on the AFM element. If you have an open breather system with a catch can that does not recir back into the inlet tract not a problem (allthough i believe this is illegall?) if your breather system does recirc then your in for some trouble.

I got these from some very experienced guys, one who has done a few AFM after intercooler instalations that have both worked very well.

Hope it helps...