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View Full Version : $28 Removable Rubber Randall Cowl Intake DIYer



1995miata
11-15-2012, 09:20 PM
Hi all,
New here and thought this might be of interest. This was so simple - and it actually did some good too.

1) Cut a 2" round hole in the firewall/cowl.
2) Cut the original plastic intake tube right below the master brake cylinder.
3) Cut the curved section in a Dayco 72020 automotive hose ($28 at Autozone) to most effective route from the intake tube to your new firewall/cowl hole and slip the hose inside the intake tube's throat.
4) Slip the other end of the hose (trimmed down about 8" on the straight end) through the cowl opening leaving an inch or so to keep any water from reaching the opening.

When cut correctly, the hose bends create a perfect fit and no hardware was required. I have driven several months with this in place and seen no movement. Can be removed in seconds without tools to access the clutch reservoir.

What is really happening here is horsepower recovery - that is to say, whatever horsepower is lost due to hot engine bay air intake temps has been recovered with an ambient air intake spource. Acceleration is smoother in the mid/upper range - especially in cooler weather. Nothing earthshattering but money well spent...

567356745675
__________________
Brian Patterson of Powell, TN
1995 Miata 'Black Flea' | 2007 Suzuki V-Strom DL650A | 2003 Benz E320 | 1996 Jeep Cherokee

revlimiter
11-15-2012, 09:46 PM
Very cool mod and nice find on that hose! I'm sure quite a few folks will benefit from this.

Agent☣Orange
11-15-2012, 10:22 PM
Nice write-up, I see this is your first post so welcome to the forum and you even began with a write-up! Cool.

Phatmiata
11-16-2012, 01:16 PM
Cool idea!! Thanks for the heads up!

maharaj
11-16-2012, 02:56 PM
First post and it is something like this! He should get some bonus points!

treeafodo
11-16-2012, 03:44 PM
Sweet little write up. Welcome to the site by the way.

The Driver
08-05-2013, 08:49 AM
After my first track time ever, I'll be doing this, so subscribed. Too bad the OP never came back!

tsingson
08-05-2013, 08:51 AM
He might be working on a HUGE DIY write up for something else?

MartinInShorts
08-05-2013, 01:07 PM
Anyone else try this?

The Driver
08-05-2013, 01:11 PM
Anyone else try this?

Oh, it's a well known and proven method. Google it as "Randall Cowl intake"!

Martin
08-05-2013, 03:20 PM
:)

http://mazdaroadster.net/showthread.php?4974-DIY-Randall-Intake-w-detailed-instructions!!!&highlight=randall&p=81068#post81068

atank
08-05-2013, 03:21 PM
Welcome to the forum, this is a good mod!

The Driver
08-05-2013, 03:34 PM
:)

http://mazdaroadster.net/showthread.php?4974-DIY-Randall-Intake-w-detailed-instructions!!!&highlight=randall&p=81068#post81068

:fp: