Have any of you mazdaspeed owners tested the limits of the engine bone stock?? I know that one of my friends has a B6T in his 323 and has been running 18 psi for nearly a year now on stock internals. What are your opinions on the mazdaspeed being able to accept this type of boost? Has anyone gone up from stock yet? Thanks in advance

 

Stock Internals? ie same ecu, rods, pistons etc? I give it about 7.5psi, I believe is what some people are running. Somebody around here is running 9psi on stock internals but they are using something to retard the timing etc.

 

Ike. Sounds like kind of a brittle engine.

 

The stock MSP runs 6.9psi. Boost cut is at 10psi.

I would imagine it can handle as much as 15psi from that dinky t25 before it becomes inneficient. It's still the tranny that will take the beating.

 

FS = sideloading king. It's going to be alot weaker than another motor with the same size [girth] rods because the crank angles are higher. Bryan ran his at about 1 bar a few times before he got a crack in the intake boot and leaned out. It's gonna be sweet to see what his fully built FS will run though...