2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

no overboosting with full strait 80mm exhaust?!

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Old Aug 27, 2007 | 07:56 PM
  #1  
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no overboosting with full strait 80mm exhaust?!

well i added these mods to my car its a turbo FC from japan ( S4 )

-strait through 80mm single stainless steel exhaust w/ sebring tuning presilencer (no screens strait through also)

-Walbro fuel pump high pressure 255LPH

-BLITZ SS blow off valve

-FCD

im running stock everything besides those mods, even stock airbox! im wondering why i got no boost spike (maybe 1 psi) did the wastegates come bigger in japan or somthing?!!? im pretty happy either way!
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Old Aug 27, 2007 | 08:46 PM
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i was hitting 15psi in 2nd gear on my stock turbo with 3" exhaust.. are you sure your wg isnt already ported?
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Old Aug 28, 2007 | 01:11 AM
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Maybe using the stock airbox is keeping hte boost in check?
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Old Aug 28, 2007 | 01:26 AM
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Damn that's Sounds bad A$$ It might me the Wastgate is set right.
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Old Aug 28, 2007 | 05:42 AM
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nope wastegate wasnt already ported.. how often were you overboosting ? mine dosent over boost at al stays at a steady 5-6 PSI. when i got the car everything was and mostly still is bone stock.. including the working A/C
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Old Aug 28, 2007 | 05:46 AM
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How long have you been running this way?
Have an idea what your gas mileage is?


-Ted
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Old Aug 28, 2007 | 09:00 AM
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blow off valve leaking?
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Old Aug 28, 2007 | 10:47 AM
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How are you reading boost? Aftermarket boost guage or stock?
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Old Aug 28, 2007 | 05:33 PM
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Originally Posted by RETed
How long have you been running this way?
Have an idea what your gas mileage is?
-Ted

ive been running this way for about a week now, gas milage is the same (maybe a TINY bit wose but bairly noticeble it only runs rich when the BOV goes off because its venting into the atmosphere) my narrowband tells me its the near same though just a tad bit richer



Originally Posted by xboxthug13b
blow off valve leaking?

no its not got the proper installation kit from BLITZ, and it wasnt overboosting before i put the BOV on (put it on 2 days after the exhaust)


Originally Posted by fossil_484
How are you reading boost? Aftermarket boost guage or stock?
aftermarket, stock one is innacurate because of the FCD, im currently using a autometer pro-comp ultralite series boost gauge

and im also running the stock ECU at the moment
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Old Aug 28, 2007 | 05:55 PM
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does it have a ajustment ****?
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Old Aug 28, 2007 | 07:30 PM
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Originally Posted by TurboMazdaSpeed
ive been running this way for about a week now, gas milage is the same (maybe a TINY bit wose but bairly noticeble it only runs rich when the BOV goes off because its venting into the atmosphere) my narrowband tells me its the near same though just a tad bit richer






no its not got the proper installation kit from BLITZ, and it wasnt overboosting before i put the BOV on (put it on 2 days after the exhaust)




aftermarket, stock one is innacurate because of the FCD, im currently using a autometer pro-comp ultralite series boost gauge

and im also running the stock ECU at the moment
Not that the stock boost gauge was accurate to begin with... FCD or Not.
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Old Aug 29, 2007 | 04:39 PM
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haha true that. and what do you mean by a adjustment ****? no ***** were messed with during the installation..lol , though ther is 1 i dont know whats purpose is, its near the airbox above wher i have my FCD plugged in , i think its for idle lean / rich adjustment would have nothing to do with the turbo
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