I use 5000 as my redline with my ABA/8 valve hybrid.  I use 4000 as my top
sustained RPM, like when climbing a mountain in my 4th(I run a stock gear
5sp)
   you could google your particular motor's redline..
I just picked my own from personal preference and it's been good for over
1000k of my own driving.. bought the motor used.

On Mon, Oct 15, 2018, 8:13 AM ddbjorkman@verizon.net <ddbjorkman@verizon.net>
wrote:

> While following the zetec thread, it brought up a thought.  I am running
> an I4 Golf Gen V, FAS install.  I am very familiar with the top safe rpm's
> in a waterboxer, but wonder what is the rpm range for the I4.  I know I
> have a much wider rpm range, but when am I entering the "yellow" and "red"
> (on tach) with my current engine?
> Dave B.
>