My car is spuddering at high RPM

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Old Jun 6, 2003 | 12:52 PM
  #1  
1.8Tities's Avatar
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From: South Burbs of, IL
Default My car is spuddering at high RPM

We'll, finally my car is boosted and I'm having some problem with it. My engine spudder at high RPM, bogs, and it seems it's choking it self. What could be the problem? I'm also running too rich.

My set up are
14b turbo
450cc DSM injectors
SMC+
idle = 40%
1-2k = 38%
2-3K = 36%
3-4K = 35%
4-5K = 34%
5-6K = 34%
6-7K = 32%
7-8K = 32%

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Old Jun 6, 2003 | 12:56 PM
  #2  
silverEH2's Avatar
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From: Dallas, TX
Default Re: My car is spuddering at high RPM (4thGSi)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4thGSi &raquo;</TD></TR><TR><TD CLASS="quote">I'm also running too rich.
</TD></TR></TABLE>
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Old Jun 6, 2003 | 01:52 PM
  #3  
Slammd Sol's Avatar
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From: Central, FL
Default

Umm yeah .. unless your running like over 12psi... thats running really rich.. I am also running DSM 450's and an SMC+. My settings are : idle= 40, 4k-5k= 38, 5k-6k= 37, 6k-7k= 36.. etc.. These are on my D15b7 @ 6psi and im running very rich still.. so definetly turn yours down.
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Old Jun 6, 2003 | 09:53 PM
  #4  
filthy frank's Avatar
 
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Default Re: My car is spuddering at high RPM (4thGSi)

had the same problem as you! the vafc will take care of it, if your running
a FMU? it will bring your FP way up lean it out with the vafc, it took care of my problem.
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Old Jun 6, 2003 | 10:46 PM
  #5  
Tomek's Avatar
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From: City by the Lake
Default Re: My car is spuddering at high RPM (filthy frank)

hes not running an fmu.....he running an smc.
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Old Jun 7, 2003 | 12:32 AM
  #6  
tegasaurus's Avatar
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From: Scottsdale, AZ, usa
Default Re: My car is spuddering at high RPM (AztecEJ)

get the car tuned, check the ignition components also, especially the gap of your plugs.

-ryan
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Old Jun 7, 2003 | 08:51 AM
  #7  
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Default Re: My car is spuddering at high RPM (AztecEJ)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AztecEJ &raquo;</TD></TR><TR><TD CLASS="quote">hes not running an fmu.....he running an smc.</TD></TR></TABLE>
well what ever it is it's burnning way to rich, on my set up when vtec kicked
in it felt like it was redlineing at 5,500 rpm's had garage kawi try to fix it no
luck? went to CJ motor sports and saw what my car was doing on the dyno
when vtec kicked in it went off the scale rich 9.5 or somthing.so the motor was flooding it's self out, they leaned the mess out of my vafc and no more problems, but no power, 188hp out of an h22turbo WTF? now i just got hondata so the beast is comming! it;s all about tunning went threw
micky mouse bull **** for months. stand alone is GOOD!
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Old Jun 7, 2003 | 05:59 PM
  #8  
SiR Kid's Avatar
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From: Memphis, Tennessee, USA
Default Re: My car is spuddering at high RPM (filthy frank)

Pull the gap back to about 20, That'll help out a good bit. I was running stockish 30-35, and it blew the flame out on the dyno at anything over 10 PSI and 6500 rpm.
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Old Jun 7, 2003 | 06:07 PM
  #9  
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From: Tampa, FL, USA
Default Re: My car is spuddering at high RPM (4thGSi)

plug gap set to .028
set ignition timing to 10 degrees
try setting fueling at -38% across
dyno with wideband to verify all is well
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Old Jun 7, 2003 | 06:26 PM
  #10  
safe driver's Avatar
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From: mpls, mn
Default Re: My car is spuddering at high RPM (VaporTrail)

i'm using the afc hack with the safc v2
settings are -39@6400, 7000, 7600rpm and i'm running pig rich... around 11.5 afr
plug gap set to .035
retard 5 degrees statically via msd digi6+
made 257whp and 195tq at 7200rpm and 6.5psi
turbo is a to4e/t3 60trim .60ar/.63ar stg3

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