IDF40's centre mount air filter

landfall Officially Full-On Dubber

290 posts · joined Jun 2014 · 8 Jun 2016, 7:05 am

#1027008

I am considering making a centre air filter set up for my dual 40's.

The engine is 1600 capacity and I am running 28 vents.

It appears that there is a lot of turbo induction material about and it would be easy to make a system from 3" dia pipe work.

I have a feeling that with 3"pipe work I may have air velocity trouble?

Is there a maximum size I should be looking at or will 3" intake tubing be OK?

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 · 8 Jun 2016, 7:34 am

#1027012

I would think that the 3" would be ample

I used CB Turbo Tops and they are 2"

Have a look at the CSP one

Futue te ipsum!!!

vwo60 Veteran Volks Folk

2,036 posts · joined Feb 2007 · 8 Jun 2016, 5:42 pm

#1027022

I made this et up on a 1775 with a engle100 cam, the pipe size was 2.5 inch, an over kill really when you consider the standard air clearer inlet size, this worked very well and made a good improvement

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landfall Officially Full-On Dubber

290 posts · joined Jun 2014 · 8 Jun 2016, 9:11 pm

#1027031

Thanks for the photos, I have started to fabricate a 3" system.

CH5353 Slammed & Awesome Dubber

90 posts · joined Aug 2009 · 9 Jun 2016, 6:21 am

#1027036

Have a look at Alfa boxer style engine set up.
Fan housing maybe a problem but could give you some ideas
They fit with some mods to T4 in a 914

67 T1 BJ IRS
61 T1 Karmann Cab

lauzboy Seriously Crusin Dubber

177 posts · joined Mar 2005 · 10 Jun 2016, 11:28 am

#1027075

here's what i made out of PVC pipe as a proof of concept. Works a treat at quietening it all down. I might eventually get around to getting it fabricated in steel or ali pipe

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barls Administrator Causer of Chaos and Mayhem

9,473 posts · joined Jun 2004 · 10 Jun 2016, 11:37 am

#1027076

this is the one that we made ages ago its based on an excel airbox.

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landfall Officially Full-On Dubber

290 posts · joined Jun 2014 · 10 Jun 2016, 4:34 pm

#1027083

Thanks, that givers me plenty to work with.