GSlender's Track Beeotch!

gslender · Postby **gslender** » Mon Sep 01, 2014 11:15 am

Started building the balsa-wood air box template - it is actually a fairly therapeutic process such that I'm actually really enjoying it.

One thing I'm unsure about, does anyone know what volume or distance of air I should be allowing around the trumpets? Is it a simple case of more = better?

Obviously as the box gets bigger, it becomes more likely to foul on things and generally become a pain with engine vibrations/rocking allowing the box to come into contact with other items, as such there is a desire to keep it reasonable and reduce size unless need/of value etc.

So knowing the optimum space around the trumpets (as a general goal) would be good to know.

G

plohl · Postby **plohl** » Mon Sep 01, 2014 11:23 am

G, generally bigger is better. I think Prof G.P Blair has some articles about plenum volume in racecar engineering that you might be able to find. IIRC 6x engine capacity or more would give the best results. I am not really sure how much difference it'll make on a street car though, most of the data I have seen has been for FSAE or formula cars with restrictors.

p.s. post more photos

Magpie · Postby **Magpie** » Mon Sep 01, 2014 11:48 am

From my conversations with Patrick at Competition Systems you need at least 20 mm from the top and sides of the trumpets to the air cleaner.

This is also mentioned on the Pipercross website "Remember to leave at least 20mm between the end of the trumpet/carburettor inlet and the inside of the filter." http://www.pipercross.net/pipercross-px600-twin-carburettor-air-filters_p24039543.htm

gslender · Postby **gslender** » Mon Sep 01, 2014 8:43 pm

Flex E85 sensor installed. Now just need to wire to the ECU

Sent from my iPhone using Tapatalk

Dweezle · Postby **Dweezle** » Mon Sep 01, 2014 8:53 pm

Awesome!!
Looks so neat.
Would this work with one of your MS2's??

Sent from my SM-N9005 using Tapatalk

gslender · Postby **gslender** » Mon Sep 01, 2014 9:06 pm

Dweezle wrote:Awesome!!
Looks so neat.
Would this work with one of your MS2's??

Sent from my SM-N9005 using Tapatalk

Thanks

Yep, any MS2 or MS3 with current firmware will work with the sensor and adjust fuel/spark in accordance with ethanol levels in the fuel.

That's the theory. I'll be keen to configure, fill up and determine if indeed it just works or if the reality is not as smooth.

G