This thread builds on the knowledge gained from my first build thread located here: Jimmy's First Turbo Build (Greddy)
In my old build thread I measured and proved that the Greddy manifold and turbine housing are a performance bottleneck at higher RPM, restricting the potential of the boosted Renesis. All the details of my measurements are in the other thread, but in summary, excessive exhaust manifold pressure vs. boost pressure showed the system was inefficient, and changing to higher flowing turbine/compressor wheels did not significantly improve the exhaust boost pressure ratio (EBPR), meaning the efficiency is lost in the manifold/turbine housing.
This new build consts of a low mount tubular mani connecting to a T3 turbine housing that I've put on my previous modified Greddy turbo.
Turbo Details: Similar to a Garrett GTX3576, the turbo uses a greddy/mitsubishi oil cooled core (TD06H) with a large compressor housing (better for lower boost applications, e.g. <18psi). The original T25 internal wastegate turbine housing is replaced with a T3 twin scroll housing with no iwg. This is described as a 12cm turbine, which equates to 0.89 A/R - the largest AR value I could get on a T3 twin scroll for the TD06H. A Garrett GTX 76mm billet compressor wheel is used. The original Greddy 12 blade turbine wheel has been replaced with an 11 blade wheel to improve exhaust gas flow without significantly impacting spool.
Brettus and I have been chin-wagging for a while about the ultimate low-mount manifold design, and I've now decided on the method I'll use...assuming my fabrication skills are up to the task. I purchased and learned to TIG weld specifically for this project. Everything I've welded to date has just been fooling around, but I'm about ready to pop my TIG cherry. I'm going all the way with this build.
In my old build thread I measured and proved that the Greddy manifold and turbine housing are a performance bottleneck at higher RPM, restricting the potential of the boosted Renesis. All the details of my measurements are in the other thread, but in summary, excessive exhaust manifold pressure vs. boost pressure showed the system was inefficient, and changing to higher flowing turbine/compressor wheels did not significantly improve the exhaust boost pressure ratio (EBPR), meaning the efficiency is lost in the manifold/turbine housing.
This new build consts of a low mount tubular mani connecting to a T3 turbine housing that I've put on my previous modified Greddy turbo.
Turbo Details: Similar to a Garrett GTX3576, the turbo uses a greddy/mitsubishi oil cooled core (TD06H) with a large compressor housing (better for lower boost applications, e.g. <18psi). The original T25 internal wastegate turbine housing is replaced with a T3 twin scroll housing with no iwg. This is described as a 12cm turbine, which equates to 0.89 A/R - the largest AR value I could get on a T3 twin scroll for the TD06H. A Garrett GTX 76mm billet compressor wheel is used. The original Greddy 12 blade turbine wheel has been replaced with an 11 blade wheel to improve exhaust gas flow without significantly impacting spool.
Brettus and I have been chin-wagging for a while about the ultimate low-mount manifold design, and I've now decided on the method I'll use...assuming my fabrication skills are up to the task. I purchased and learned to TIG weld specifically for this project. Everything I've welded to date has just been fooling around, but I'm about ready to pop my TIG cherry. I'm going all the way with this build.
Jimmy's Second Turbo Build (custom low mount)
0 commentaires:
Enregistrer un commentaire