Mazda Rotary Club

General => General Technical => Topic started by: pearl_rex on November 02, 2008, 06:13:10 PM

Title: probably a stupid question....
Post by: pearl_rex on November 02, 2008, 06:13:10 PM
everyone says how big a no no it is to get a de-cat without getting it remapped accordingly as it will cause the engine to over boost....what if you just get a boost controller, will that not keep the boost in check? like i said its probably a really thick question but i think my cat has given up on life and i just cant afford 500+ quid for a pfc and remapping session :rolleyes:

cheers in advance :WaveBye
Title: probably a stupid question....
Post by: SiH on November 02, 2008, 06:24:46 PM
A boost controller won\'t be able to control boost creep that may occur - search for boost creep and all should be revealed :)
Title: probably a stupid question....
Post by: pearl_rex on November 02, 2008, 06:25:34 PM
spankoo very much :) time to get saving my pocket monies then!! lol
Title: probably a stupid question....
Post by: m1tch on November 02, 2008, 07:13:57 PM
Boost creep will happen as the turbo will find it easier to spool and spin up, just be careful lol boost creep causes engines to go pop
Title: probably a stupid question....
Post by: RedRummy on November 02, 2008, 08:10:07 PM
the boost will increase (spike) so quickly that the boost controller won\'t be able to reduce it quickly enough.

There isn\'t really a way to avoid this, even with a remap. You\'d be better off getting a high flow cat, but you\'d probably still need a bit of mapping with one of those.
Title: probably a stupid question....
Post by: SiH on November 02, 2008, 10:19:38 PM
Quote from: m1tch;550216Boost creep will happen as the turbo will find it easier to spool and spin up, just be careful lol boost creep causes engines to go pop

That\'s a boost spike :)
Creep is where it rises over time due to not being able to expel enough gas through the wastegate :)
Title: probably a stupid question....
Post by: rx jamie on November 02, 2008, 11:46:37 PM
Quote from: SiH;550383Creep is where it rises over time due to not being able to expel enough gas through the wastegate :)

i never knew that. learn something everyday.
Title: probably a stupid question....
Post by: RedRummy on November 03, 2008, 07:51:58 PM
will still get proper boost spikes though.
Title: probably a stupid question....
Post by: adib on November 03, 2008, 10:04:37 PM
iv just got a straight throw mid pipe for mine to replace the silenced mid pipe that is rattling like a pig and they say thats a no no, o well see what happens, if it goes pop at least ive the winter to rebuild it lol
Title: probably a stupid question....
Post by: pearl_rex on November 04, 2008, 06:52:33 PM
so would my filters and catback be the reason its developing an over boost? or boost creep...and popping alot for the first 10 minutes of driving it from cold?
Title: probably a stupid question....
Post by: neil_jdmr on November 04, 2008, 08:21:47 PM
Without a pfc, i would certainly say so fella.