DIY Cowl intake

[Mr nanotech]

Obviously from the title, I'm looking to make my own cowl intake for my na6. Sick of my pod next to the extractors and want a more efficient cold air intake.
I should be right with the mandrel bent pipes off the throttle body and joins, but what I'm having trouble with is the pod shield and following pipe.
I'm looking to build something like this http://cgi.ebay.com.au/ws/eBayISAPI.dll ... K:MEWAX:IT

If anyone can throw in their two cents, it'd be most appreciated! oh and any ideas on mounting brackets would be fantastic too!

[Okibi]

I'm sure there's been a few different write ups on this forum over the years.

Matty did a great autospeed article looking at the different restrictions in the NA MX-5 intake.

I think the trick is to find a good enclosed filter that will work for a cowl intake.

Personally i'd then go to bunnings and supercheap, look at a plumbing pipes and a connector to attach to the firewall, a hole saw then get some joiners and clamps from supercheap.

The easiest solution is to buy a pre-built system from a forum sponsor.

[SuperMazdaKart]

The above filters are the Simota pod with it's own heat shield.

http://www.simota.com.au/


Bit of flex piping from Super Cheap Auto/Auto Barn (or aluminium flex piping for house air conditioning ducts at Bunnings), miscellaneous joiners from Bunnings, is what I did for mine.





Can also use a JetCo filter which is just a rebranded Simota with a different casing. I use this on the Familia GTR.

[rossint]

This is what I did, same filter as super.

[93_Clubman]

nano, might be useful to approach this as a two stage project. First get Simota filter, AFM adaptor, piping to cowl, & preferably cut 75mm circular cowl hole. Why 75mm? If you want go with a Mania CAI funnel later you'll already have the correctly sized cutout - also locate the cutout so that if you want to fit a tower brace later you'll be able to.

Might be worth checking with sweep77 in outer SE Melb as his old home made one might still be available: viewtopic.php?f=44&t=38181&start=45

Then if you still want to go for an enlarged engine crosspipe, you can do this as stage two. However, keep in mind that the ebay pic is of an NA8 which has a different thermostat holder design to the NA6, hence the detour in the NA6 engine crosspipe when compared to the straight NA8/ NB8 engine crosspipe. As a result it's relatively easy to fit an enlarged straight engine crosspipe to an NA8/ NB8.