2010+ Mazdaspeed 3, I recommend to monitor your fuel pumps closely

[ebnash]

Originally Posted by Spoofmastafly Well all i've gotten from the alpha testing thread is the stock CDFP will be fine till you raise boost PSI. Cobb will have OTS maps that don't do this for owners without a HPFP. I'm running a Corksport intake/tip UR highflow catted DP, TP, and CBE.. and I've got no issues with the my fuel pressure dropping below 1600PSI. Fuel pump keeps up fine.. now once I raise boost pressure with the AP I'm sure I will need internals.. such is why I've already got mine ordered threw KMD. No need to try to scare every gen2 owner into buying a HPFP first. I've has no issues what so ever.. We should scare every gen2 owner into NOT going catless.. which will cause boost spikes and creeps.. and then we will blow...

I understand that is what you have experienced with your set-up, but I have only a CS SRI/TIP and Racepipe and I logged last week seeing pressures drop below 1200. There is no absolute formula to run completely safe on these engines. Everyone sees something different. Also, with my mods I saw some boost spikes to 18 psi in 3rd gear so you don't need major bolt-ons to cause issues. I would think you should definitely see boost spikes installing a downpipe whether it is catted or not.

I think the most important item here is that you should have some data monitoring system if you are going to mod. When I installed the ETS top mount, I had all kinds of surging under boost. I removed it and it went away, but my fuel rail pressures are still not stable with the intake and RP.

[Spoofmastafly]

Originally Posted by ebnash I understand that is what you have experienced with your set-up, but I have only a CS SRI/TIP and Racepipe and I logged last week seeing pressures drop below 1200. There is no absolute formula to run completely safe on these engines. Everyone sees something different. Also, with my mods I saw some boost spikes to 18 psi in 3rd gear so you don't need major bolt-ons to cause issues. I would think you should definitely see boost spikes installing a downpipe whether it is catted or not. I think the most important item here is that you should have some data monitoring system if you are going to mod. When I installed the ETS top mount, I had all kinds of surging under boost. I removed it and it went away, but my fuel rail pressures are still not stable with the intake and RP.

I get what your saying, I was just simply throwing my input out there.. I just got back doing three logs myself.. Having only spiked to 16psi once, and fuel pressure to never drop below 1600psi when in 14-15psi boost range.. Even hit 1700psi once or twice..

Every car is different.. a ETS top mount is similar to running a catless DP.. it opens up the airway alot on these cars.. I wouldn't suggest running one of them without an upgraded hpfp.

But I completely agree everyone should but a monitoring system before anything else.. DashDAQ will have complete PID's sooner or later.. I love mine.