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Afm Placement

Room42

By Room42,
in Engines & Forced Induction

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Room42 Proficient

Room42

Posted
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Some of you know that I am putting a gt3582r on top of a 6boost manifold in my r33gtst. I have a z32 afm. Where have you put yours? I was thinking near the start of the "J" pipe. I have done some reading about it and I'm after first hand experiences on what psi it has burst at. Does wrapping it help? The manifold will be here early next week so I want to start getting it ready this weekend. Any other tips appreciated in regard to afm in cooler piping.

thanks.gif

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XRATED Veteran

XRATED

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Posted

I have mine post cooler- pre tb in the straightest part of the pipe. There realy needs to be 200mm from the element to the tb and a fairly straight inlet into the afm.

I've been told by some very experienced guys to cut a hole in the existing pipe work, remove the electronics and sensor from the z32 housing and epoxy it in place.

I'm running a t67 and around 300rwkw with no issues at all.... infact, less issues. I've had the boost around 2 bar so far.

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Room42 Proficient

Room42

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make an intake pipe with a bend and put the afm pre turbo. aslong as theres a bend between the afm and turbo it'll work as per factory

Sounds good in theory but the turbo has a 4 inch inlet and restricting this in any way affects the spool of the turbo. I thought the same thing as you until I looked into it.

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JonnoHR31 Grand Master

JonnoHR31

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Sounds good in theory but the turbo has a 4 inch inlet and restricting this in any way affects the spool of the turbo. I thought the same thing as you until I looked into it.

myth. a 3" afm is not going to affect your spool

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Room42 Proficient

Room42

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myth. a 3" afm is not going to affect your spool

I know we were debating this in another thread a couple of months ago. I believed that because the actual hole in the front of the turbo is only about 2.5 inches (that's the technical way of saying it) that a 3 inch afm in front of it wouldn't matter. I cant for the life of me remember where I read it, and it wasn't Harey's comments, but it convinced me that it is better to run a filter straight from a pipe to the turbo and put the afm in the cooler piping. It will be easier to set up, putting the afm in front of the turbo. I'll try and find the link where it mentions it's not good to have the afm in front.

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jeffworld2 Veteran

jeffworld2

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had a single z32 on a twin turbo so i stuck it in the hot side cooler piping, just extended the wiring down. Ran like that for a year and was great as you could do whatever you wanted on the turbo side as far as pulling things apart/changing intakes and it would still fire up halfway through to move around with 0 issues.

I do suspect it was leaking a little bit on 1.4 bar as every now and then i would push the sealing square cover thing back in on its rubber

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Room42 Proficient

Room42

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Ok so I got the 6boost manifold today and trial fitted it on the car with the turbo, wg and lines hooked up. As it turns out there is no room for the standard "J" pipe any more. I dont really want to cut it but I think it will fit if I do. I can then use all the standard vac lines to the carbon canister and bov. Also the intercooler pipe that comes across the fan wont fit either. But its all good tho. Tomorrow I'll invest in some silicone bends and a hacksaw to modify some of the piping that was on the car and some stuff in the shed. I will try the afm in front of the turbo for now and see how that goes. That way I can get away with using the existing air filter and afm wiring for now.

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WYTSKY Veteran

WYTSKY

Posted
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Got mine in hot side intercooler piping (+ve pressure) - gotta make sure it doesnt leak and silicon/epoxy it up. Advantages are as has been said - can drive the car with no intercooler piping and it will be fine up until boost obviously, really smooth all round, no recirc issues like stalling with a bigger turbo when clutching in etc and not infront of turbo so not a restriction with a 4" intake.

Soz about crappy pics

post-36975-0-34791000-1317418984_thumb.jpg

post-36975-0-06414100-1317419003_thumb.jpg

Had to relocate bov as well as if it is before the afm there will be real issues with recirc and stalling etc

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