CBC2 / CBX

We have had a number of questions regarding the difference between these two coatings and questions as to when each should be used. Both coatings have the same temperature range, which exceeds the melt point of aluminum. You could melt the piston without hurting the coating. The difference between the coatings has to do with how they handle high compression and high fuel volumes.

CBC2 is recommended for all normally aspirated engines, not running nitrous, and that have compression ratios below 12. to 1. CBX should be used in all applications where the compression ratio is above 12.5 to 1 or when used with nitrous, turbo charger(s) or superchargers. The main difference has to do with resistance to vapor blasting that can occur with high fuel volumes, particularly when a tight quench area exists. Closed chamber heads are especially sensitive. It does not matter what fuel is used or if the engine is a 2 stroke or a 4 stroke, use the above guidelines.

Check the Sartor Brothers, South Africa web site at www.powerkote.co.za for pictures and a video of how well CBC2 handles heat. The piston pictured basically only melted on the non-coated side. Check it out.

Daytona Beach BIKE WEEK

Tech Line will be sharing a booth at the Bike Week with our sister company Car Chemistry. Our booth will be at the Stone Edge Skate Park in South Daytona Beach. Stop by and say hello if you are near by. A new exhaust system will be available that initially is being released for Motorcycles, but will be adapted to automotive applications.

Magazine Stories

Two stories have appeared this month in enthusiast magazines that show coated pistons and other parts. One shows a non Tech Line coating shop, but in the March Car Craft we do get a mention. Use these stories as they show the continuing acceptance of internal engine coatings. We continue to see increased sales. One shop just reported a test that not only shows a H.P. increase, but needed less timing, while loosing no top end, which is not normal when you use less timing.

In the Car Craft story the engine is a small block Mopar, running 10. 4 to 1 compression, on PUMP gas.

CERMALUBE

CermaLube is now available as a single component material. We did not want to offer it as a 1 part until we were sure there would be no adverse reaction from mixing the 2 parts. Our test sample was blended in July of 20901 and sat untouched until this month (January). The material blended easily, unlike the part A, and there was no hard sediment. The material sprays fine and has excellent adhesion. We sent a sample to Doug at Process Coatings, who is very experienced with the material, and he indicated that all was well. This will make it much easier to use.

Common Spray Problem

Always disassemble and clean a new spray gun. Many times there is a small residue of oil from the manufacturing and assembly process. This can contaminate the coating as it is sprayed. A critical area is around any seal or "O" Ring.

Send e-mail to the editor: Leonard Warren