Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: rmagictastic on January 30, 2006, 09:37:27 AM

Title: Boost is up
Post by: rmagictastic on January 30, 2006, 09:37:27 AM
ive recently changed all my piping on the intake all the way to the plenum to hard metal pipes. ive also changed the I/C for an uprated one.

i am now seeing 1 bar at max chat.

the car has previously been mapped (before the above mods) to 0.8 bar-0.9 bar.

would these mods usually result in additional boost?

i would have expected the apexi power fc to still control the boost to its predefined limits and not let it go above that? am i incorrect??

cheers

N
Title: Boost is up
Post by: banned advertiser on January 30, 2006, 09:47:01 AM
Apexi is crap at controlling boost, fit a controller.
Title: Boost is up
Post by: rmagictastic on January 30, 2006, 11:34:22 AM
they cant be that bad can they??  dont they use the map sensor??

N
Title: Boost is up
Post by: iaint on January 30, 2006, 12:47:19 PM
Might be that you fixed a leak in the process but Gary\'s right - fit an Electronic Boost Controller (EBC).  You\'ll cry if you det from overboosintg!
Title: Boost is up
Post by: Fish on January 30, 2006, 12:53:45 PM
The Apexi cannot control stock boost let alone raised boost levels. Get yourself either the Profec B or the HKS variant, they are known good controllers and dont cost a fortune.

Fish
Title: Boost is up
Post by: rmagictastic on January 30, 2006, 01:24:06 PM
thanks guys now looking for a controller.

more salient question is why has the boost increased??  is this really an effect of my piping and IC mods??

N
Title: Boost is up
Post by: Initial-D on January 30, 2006, 01:57:28 PM
Basically, your flow of gasses has been increased which results in more boost.
Title: Boost is up
Post by: Christopher on January 30, 2006, 02:01:10 PM
Also the cold weather we have and the uprated intercooler you now have make your boost higher.

Im mapped to 0.8 bar but in the cold nights/ mornings I can hit 0.9 bar
Title: Boost is up
Post by: rmagictastic on January 30, 2006, 02:08:48 PM
im surprised its made such a difference.

you right it was Blo*dy cold last night.

wont be boosting till this is done then!

N