Post by
meminto »
https://forums.nicoclub.com/meminto-u95701.html
Sun Oct 05, 2008 1:04 pm
For those who want some more detail on the head work:
Other than the extensive porting, the valvetrain has been converted to RB25 solid specs, this was required for what I want to achieve, however I researched a number of valve stem length and head diameter combinations...
The RB25 Solid conversion was the best solution (The stem length is longer than its hydraulic counterparts)...
Here is a comparison (I will update the CA18 spring info when I have it handy)
As you can see from the comparison, there are much larger diameters to deal with in terms of valve head size, I must stipulate that larger is not always better, all these components have been thoroughly researched. calculated and matched....
The stem lengths have been machined down, but not to CA specs as it would defeat the purpose..
The cam specs I won't divulge just yet, (base circle is 29mm but you can put 2+2 together for a rough idea), however the lobe recesses were line bored to ensure correct clearance of the cam lobes themselves..