GT25R Fixing to rig and clocking the housings
- Whilst waiting for spare exhaust manifolds I made a pair of adaptor plate so that I could mount the turbo's
- as they would be positioned on the car. This give me best chance of sorting most of the alignment problems up front.
The compressor housing is secured to the bearing housing by means of a large circlip which has tapered edges
which seat into a groove and pull the 2 housings together. The turbine housing is secured using bolts x6 and
half moon clamp rings x2. By simply loosening the bolts or squeezing in the circlip, both housings are free to
rotate around the bearing housing. Since the position of the compressor housing is pre-defined by the angle of the
exhaust flange, the easiest way of achieving the correct positioning (clocking) is to bolt the turbo securely to the
manifold flange first.
The standard position and mount bracket for the gtr25r waste gate actuators will not work, it has to be re-made and
re-positioned. I don't know what pressure the actuators open at, this something to be investigate later.
- So far I'm quite pleased, a quick check of how far the gt25r's extend from the manifolds is very promising compared
to the standard lc turbos. I will make some actual measurements and bolt up the std lc