Really loud afterfiring - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 05-04-2009, 04:50 PM   #1
I EAT CUM
Thread Starter
iTrader: (6)
 
Join Date: Sep 2008
Location: Redneck, Texas
Posts: 1,218
Total Cats: -1
Default Really loud afterfiring

I searched around about it but couldn't really find out if it is normal or not. I'm running a 2.5" downpipe with a 3" all the way back and a magnaflow muffler. The car is really loud(since catless and resonatorless) and so is the afterfiring. It happens when I let off the gas then hit the gas again. When I coast you hear some gurgling(you could even hear it with the stock exhaust and no turbo), but the moment I tap the gas again it lets out the loudest pop you will ever hear from a miata. It doesn't happen when the car is cold, or all the time when warm. Just kind of whenever it wants to. I'm still running stockish plugs(because I haven't gone wot just yet) and I have no real fuel management...just the timing box and soon to be the fmu. Stock injectors are still in...so all this is without the 315's. Honestly, I think it sounds ******' awesome but if it isn't normal I guess I need to figure it out :-/
Turbo_4 is offline   Reply With Quote
Old 05-04-2009, 04:57 PM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,809
Total Cats: 1,780
Default

its running rich, really rich.
Braineack is offline   Reply With Quote
Old 05-04-2009, 05:01 PM   #3
Hittin' Boost & Cones
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

+1


Why do so many people insist on installing turbos without the proper mods/ tuning???

I had crazy backfiring, but it was because my injector o ring was leaking on one cylinder causing the fuel in that cylinder not to atomize. That was with 550s while i was trying to tune from the basemap in Megasquirt tho.
240_to_miata is offline   Reply With Quote
Old 05-04-2009, 05:26 PM   #4
I EAT CUM
Thread Starter
iTrader: (6)
 
Join Date: Sep 2008
Location: Redneck, Texas
Posts: 1,218
Total Cats: -1
Default

Bandaid mods FTW






























Turbo_4 is offline   Reply With Quote
Old 05-04-2009, 05:29 PM   #5
Junior Member
 
Join Date: Jan 2008
Posts: 272
Total Cats: 0
Default

my car does that when I have my launch control on...but you got some issues...get a real engine management.
Sleeper_MX5 is offline   Reply With Quote
Old 05-04-2009, 11:32 PM   #6
Newb
 
Join Date: Apr 2009
Location: Fairfax, Virginia
Posts: 7
Total Cats: 0
Default

My car does the same thing. I just installed my turbo last week. I'm using a vortech 10:1 FMU and 97 miata 265cc brown top injectors. But it only makes that loud pop when I shift at high RPM on second gear.
pkasilag is offline   Reply With Quote
Old 05-05-2009, 12:44 AM   #7
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,353
Total Cats: 1,319
Default

I want to propose a rule: If you turbocharge your car without any sort of fuel management whatsoever, and then complain about how it either runs shitty or blows up, you get banned from the ******* forum.
Savington is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Buzzing from driver side of engine bay? (MS3 install) nick470 MEGAsquirt 7 06-16-2017 02:53 PM
Twin Walbros, one pump louder than the other patsmx5 General Miata Chat 6 09-25-2015 02:47 PM
blowing flames Faeflora Insert BS here 23 03-03-2008 01:05 PM
3inch exhaust too loud? Exhondaman General Miata Chat 32 07-19-2007 06:05 AM
loud fuel pump noise but no start ngarcia1983 General Miata Chat 3 12-26-2006 07:43 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:26 PM.