The application for my carbon fiber designed parts requires a high temp resin as they will live around high revving engines. I know the high temp resin available here has approx a 500 viscosity rating, and as I can tell a vis of 225 is required to use in the infusion method. What would I need to do to remedy this issue. I need to use the infusion method to create these parts for a few reasons. 1. A pre-preg is not always an option because of my use of custom designed, colored and sizes of fabrics. 2. Lay-up method results in parts lacking consistency in quality. 3. Infusion has become the method I've found reduces production time. If the high temp resin is pre-heated or warmed would that lower the viscosity enough to flow in infusion? What can I do to make parts with infusion that can comfortably live at a minimum temp of 110C?

Good thinking. Why not Wet-lay up and vacuumbagging it? you'll get some lightweight parts, well bonded together and so on... 

Resoltech make some high TG infusion resins.
You can also make your own prepreg with the cloth and resin you have, then work in a refrigerated room.

I have used momentive EPR 04434, it's a 200 °C resin after post cure and you can infuse it. It isn't cheap...

You can do Infusion using EC's High Temp Resin the Infusion process just takes longer. Not a problem on parts up to 0.5m square. It can be come a problem on larger parts if using the fast hardener as the resin can begin to cure before the Infusion is complete. Use the slow hardener and you should not have a problem. Be careful if you try warming the resin to make it less viscous as the resin will start to cure very quickly. And be sure to post cure properly at a temperature above the parts final operating temp.

Now I haven't tried this and we are dealing with chemistry here so be careful if you try what I am about to suggest. I was talking to a chemist that worked for an epoxy manufacturer. He said that one of his customers that made honeycomb carbon fiber plate used up to 10 % pure alcohol to reduce the viscosity of their infusion resin.It speeded flow and eliminated pinholes.
It might be worth an experiment to see.
Hope this helps.
Fred 

Thank you all for the tips. I will be experimenting.

Have you had any success with this? I am planning to make some rocker covers which will need high temp resins to cope.

Also keep in mind that there is no such thing as pure alcohol. It is an azeotrope so there will alwways be the risk of actually having water at part of the alcohol and that can be bad for epoxies if I understand correctly. 

I posted a listing that had a bunch of different infusion epoxies in the infusion topic, give those a glance.