I'm building a all sing and dancing beast (400bhrw) and what i want to know is which style of porting would i best with at that sort of Bhp Street or Bridge porting? i will be also using 13b-rew housings for this as they are thicker walled.

Also While i'm on the subject of internals other than fitting 3mm tip can anyone think of any other mods i might be well looking into?

 

This isn't exactly what you talked about, but thought you might find it somewhat interesting
13BT Vs. 13B-REW

 

I was also looking for high horsepower (500) and wanted a half or full bridgeport. Rob from pineapple racing told me that a large streetport would work just as well. We also briefly touched on P-porting but i havnt decided which one to use.

 

Not wanting to step on any ones toes here, but Node - some of the info in that is a load of crapola, yes i know it was written by a member of this forum (well i think he is anyway)

there are more people than i can think of who are making well over 400Hp on S4 blocks and dont crack plates

Cracking plates is caused by detonation unless you are making around 650-700RWHP the only way to crack plates is thru pinging.