904 front clutch spring question

[dart_68]

I've read/heard that if you're building a hipo/race 904 that the front clutch spring should be replace either with a reverse wound spring or a multiple spring pack. The reason for this is that at higher RPM the stock spring winds up and thus loosens.

Question - at what RPM would this become a problem and what would the result be? If it burns the clutches how quickly would it do it?

Thanks in advance!

 

[rbkt65]

call a&a or jon cope and they will be of great assistance to you on that question.

 

[CudaFactHackJob]

6krpm. 4.2 seconds.