Just wanted to know if you guys know if a 1.3Bar rad cap will hurt your car if you don't upgrade the radiator because I know stock is 1.1 bar. Any insight on this would be helpful. Thanks!

 

no. slightly more pressure will help keep the fluid against the cylinder walls instead of boiling away. you can also add some waterwetter, purple ice, or the like to the system to help aid in cooling. i noticed a 8-10* difference just by adding purple ice to the current system.

 

Is it necessary to add the purple ice etc when changing rad caps?

 

no no, just a suggestion to aid in the cooling... no need.