This is beginning to be a good lesson in doing things correctly! Heat buildup of any kind would not be a problem if aptar would have installed the inlet / bypass / engine mounting system, and tail pipe that Tom specifically designed for his T-33.

I did the turbine conversion a few years back, with Tom's complete conversion package, and had zero heat problem. The inlet / bypass / tailpipe that Tom sells is designed to utilize the extra size of his T-33.

I believe that without a doubt when the new higher power turbines are available i.e. the P-160 & P-200 Tom's standard flow through system including tailpipe will need no redesign and will work perfectly! The only thing I would recommend when installing 35lb thrust turbine would be to use a speed limiter, set to a maximum of around 180mph -------

Hey, when building a pre-designed, engineered, and manufactured model aircraft of the nature and caliber we are talking about why try to re-envent the wheel?
Lee --------