EX50 50mm External Wastegate Installation Instructions P.O. Box 1017 Riverwood NSW 2210 Ph: +612 9534 0099 Fax: +612 9534 3999 Website: www.gfb.com.au Email: sales@gfb.com.
GFB EX50 Wastegate Packing list: • Assembled EX50 50mm wastegate, fitted with: o 1 x 13psi spring (60mm O.D.) o 2 x V-band clamps o 1 x outlet weld-on flange (part # 7041) o 1 x inlet weld-on flange (part # 7051) o Valve seat Included in box: • 2 x banjo hose connectors & 1/8” BSP bolts Installation Install the boost nipples using a 5mm hex key, making sure that the head of the banjo bolt sits into the large tapered seat on the banjo as shown.
Spring Selection The EX50 comes with a 13psi spring, and also available are 7 and 9psi springs, which can be used individually or installed together to achieve different boost levels. Use the table opposite to determine the combination of springs required for your desired base boost level. Note that this table is only a guide to help your selection – the actual boost level achieved ultimately depends on a large number of variables, and may differ from the base boost pressure shown in the table.
The second configuration is a simple adaptation of the above, with a boost controller (such as the GFB Atomic) fitted into the pressure hose as shown to allow the boost to be easily increased above the base level. In the case of the Atomic boost controller, the arrow on the body must point in the direction shown, or the controller will have little effect. If using a different brand controller, you should consult the instructions for that product.
