Turbo to TMIC silicone pipes to replace OEM
I've seen this covered twice, here by Marky:
http://www.clubsub.org.nz/forum/index.php/topic,31651.0.html
and here by nickmcgill:
http://www.clubsub.org.nz/forum/index.php/topic,6105.0.html
The OEM pipes smallest internal diameter, primary and secondary is 28-30mm at the bend, The smallest internal diameter in the silicone is 36-38mm not to mention the ribs and corogations. Which is 7.065cm3 compared to 11.335cm3, with an air velocity of 10m/s charged to 14psi air flow rates are:
OEM pipes - 0.37m3 (783cfm)
Silicone - 0.61m3 (1292cfm)
So almost double the amount of flow.
I've just brought a pair for $58 delivered off trademe, only one with these sizes right now:
1 x 1.3/4" to 1.1/2" 45' reducer elbow
1 x 1.3/4" to 1.1/2" 90' reducer elbow
http://www.trademe.co.nz/motors/car-parts-accessories/performance/other/auction-648188424.htm