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wkrtsm wkrtsm is offline
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Join Date: Feb 2018
Location: Texas
Posts: 261
Garage
What's my 600 HP in a 912?

Since my 912 is no longer a 912, because it now has
  • SWB-to-LWB (911 '69-71 steel trailing arms)
  • 934 transaxle
  • Elephant coilovers with Bilstein 911 S struts, GT3 front suspension, Boxter brake upgrade, monoball trailing arm bushings
  • Tarrett's 935 spring plates and monoball camber plates
  • 6-8 month "welding party" for shock towers, spring plate mounts, trailing arm mounts, camber plate housing, secondary engine mounts, fuel cell mount tabs, radiator V-plate, mods for GT3 subframe installation
  • 930 turbo fender flares
  • 1973 RSR 2.8 composite front & rear bumpers
  • Speedhut gauge upgrade
  • WEVO 930 shifter
  • MOMO steering wheel

about the only thing that's 912 are the new wheel bearings, new steering box, rebuilt upper steering shaft joints.

The powerplant is a new 430 HP 6.2L LS3, for which I pulled and drove the heads to TSP (Texas Speed) and got CNC of ports & chambers, double valve springs, titanium retainers. I also personally installed a TSP stage 2 cam and Comp trunnion kit (needle bearings for rocker arms). TSP said they dyno'd new engines with what I did and results are 580-590 HP. (fyi - cam upgrades place significantly more stress-travel on valve components, so everything needs to be upgraded.)

The build link is here

Pic below shows the final engine prep:



Installing the stage 2 cam with Lucas green assembly lube:



Rocker arms with Comp trunnion kits installed:


Last edited by wkrtsm; 02-23-2025 at 11:02 AM..
Old 02-23-2025, 10:57 AM
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