G15 Technical Guide - Engine & tuning The standard engine is one of the Imp variants (typically 875cc Imp Sport, 930cc or 998cc) and in standard form is covered in Imp workshop manuals. What follows are notes and datasheets compiled over years of preparing and racing G15s. ARP rod bolt fitting 1. Unwrap and admire! 2. Clean off protective coating with thinners or similar 3. Apply moly, thread lube or similar if you wish, to thread and underside of head 4. Torque to 30lb/ft 5. Back off 6. Torque up to 30lb/ft again 7. Back off 8. Torque up to 30lb/f for the third time 9. Get racing!
Twin 40 DCOE Installations: The standard Webber linkage fits on top of the forward carb.
A tidy engine bay with several of the mods described in the Guide. |
G15 Technical Guide - Gearbox and transmission The standard gearbox and transmission is all Imp and in standard form is covered in Imp workshop manuals. Gear Ratio/Speed in Gear Charts Rotoflex Couplings: For competition use Lotus Elan ones with cap head high tension bolts and shallow Nyloc nuts. |
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