I've been told not to hook up my HKS dp on my stock set-up unless I have more fuel- is this right? obviously, I eliminate the pre-cat , but have every intention of running a 3" high flow cat.-- Am told that it will lean out to much. According to the A/F meter, I'm already running on the low-rich side-

 

sure add fuel to your gas tank and drive... running on just a DP will be fine... of course im not sure if that is your only mod seeing you have listed any mods

 

I just responded to your came question in this thread:

https://www.rx7club.com/forum/showth...hreadid=104916

 

formula mazda your on the right track buddy! get your ecu then you can drop in your dp. better safe then sorry!

 

you are fine with any mod as long as your boost stays at 10 PSI.