Boost cut?
- Thread starter zinger002
- Start date
i peak at 13-14.
i really want an mbc to maybe get like 15-16 manifold and hopefully pick up a few hp but still keep it safe.
and yeah i thought it was a solid question since a search on here and google got me about 0.012% of an answer. perhaps my keywords suckked.
i really want an mbc to maybe get like 15-16 manifold and hopefully pick up a few hp but still keep it safe.
and yeah i thought it was a solid question since a search on here and google got me about 0.012% of an answer. perhaps my keywords suckked.
according to a stock map loaded in the cobb tuning software ATR, it appears that the stock cut level is 18.21psi from 1000-5000rpm, 17.43psi @ 5500 rpm, 16.66psi @ 6000 rpm, and 14.53psi @ 6500rpm. those values are for fuel cut. the table for when the throttle will close in regards to boost is 16.24psi from 1000-4500rpm, 15.46 @ 5000, 14.69 @ 5500, 12.56 @ 6000 and 9.47 @ 6500.
basically that means if it hits those levels the throttle plate will begin to close a bit to reduce the velocity and volume coming into the engine which in turn will reduce the pressure.
basically that means if it hits those levels the throttle plate will begin to close a bit to reduce the velocity and volume coming into the engine which in turn will reduce the pressure.
Last edited:
lynnriderm6
Member
mine stock with just an intake and catback exhaust im spiking 18 holding 16-17psi
Willieville
Member
- :
- speed6
you won't need to go all the way to redline to see max boost. Like people were saying spiking to 18 and then tapering off to 15ish is normal. If after you go full boost and you still are only getting 14 there is something wrong. Also people who add a TMIC of FMIC are seeing about a 2 psi bump in Boost. Pretty easy install too.
i spike 16ish sometime 17 and then hold in the 13-14ish area. i asked mazda and they said as long as im seeing up to 15.9 ( meaning my spike) theres nothing wrong.
but i keep reading people spiking 17-18 and holding 15-16. maybe time for mbc
see but those are not stock cars. i hold 12-13 all day long. i dont spike at all. i think the highest spike i have ever seen on my gauge was like 14.
when u mash the go petal u dont see it jump for a sec then settle?
now thats what i'm talkin bout. numbers. lets see what bova's info looks like a lil more organized.
18.21 @ 1k-5k
17.43 @ 5.5k
16.66 @ 6k
14.53 @ 6.5k
this clearly explains why boost tapers off. kinda like a safety net i suppose. so in other words. without some sort of EMU, you'll never see more boost than these tables allow!?
