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GR Stumble Mod Fix: GD Style Setup (not hose extension)
GR Stumble Mod Fix: GD Style Setup (not hose extension)
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Old 05-23-15, 05:51 PM   #71
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

Quote:
Originally Posted by Gruff Gnome View Post
See my post #57 for a ghetto solution to disconnecting the fuel lines that works amazingly well.
I almost went to Walgrens to grab a Sharpie to try that, but the cotter pins worked out for me...
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Old 05-23-15, 06:52 PM   #72
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

Once you've done it more than once, much easier next time. Able to do the whole thing now in less than 20 minutes.
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Old 05-24-15, 05:51 AM   #73
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

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Originally Posted by funks View Post
Once you've done it more than once, much easier next time. Able to do the whole thing now in less than 20 minutes.
That's what she said?
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Old 05-25-15, 12:38 PM   #74
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

I'm another sti owner ran into the stumble issue after i installed cobb OTS map. just paypaled funks for his last stumble mod fix. but from what everyone is saying, itll fix the problem with a custom tune. probably going with eric from torqued performance. Might as well get an intake along with my downpipe to make it worthwhile.

I gotten a custome tune from eric before for my wrx. Does anyone know what he baseline power for stage 2 with a downpipe and intake?
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Old 05-25-15, 01:01 PM   #75
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

Don't even think the intake is worth it - I say you redirect that $$$ to an equal length header instead + up-pipe

Catted Downpipe + Up Pipe + Equal Length Header (stock catback, stock intake), keep the boost conservative (we are in California after all) and you get the following (stock intake). Tuned by Eric - only difference between the two is I went Equal (+ Up Pipe) with the blue line. Injectors per logging are below 90% IDC - so it's not maxed out.

I have the Grimmspeed Limited / Catted Downpipe (a bit pricey), Grimmspeed Up-Pipe, HKS Equal Length Header, get it Cerakoted locally and it's worth the price of admission.

Note: it's Virtual Dyno, not DynoJet but same tuner, same temp, same road, same driver.


Last edited by funks; 02-12-18 at 07:25 AM.
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Old 05-25-15, 01:49 PM   #76
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

Quote:
Originally Posted by funks View Post
Don't even think the intake is worth it - I say you redirect that $$$ to an equal length header instead + up-pipe

Catted Downpipe + Up Pipe + Equal Length Header (stock catback, stock intake), keep the boost conservative (we are in California after all) and you get the following (stock intake). Tuned by Eric - only difference between the two is I went Equal (+ Up Pipe) with the blue line. Injectors per logging are below 90% IDC - so it's not maxed out.

I have the Grimmspeed Limited / Catted Downpipe (a bit pricey), Grimmspeed Up-Pipe, HKS Equal Length Header, get it Cerakoted locally and it's worth the price of admission.

Note: it's Virtual Dyno, not DynoJet but same tuner, same temp, same road, same driver.

Image Link
I'm still torn between going equal length or getting aftermarket unequal length header...
The benefits cylinder 2 and 4 are there and the torque but i dont know if I can give up the rumble... do you know if you get any gains from an aftermarket unequal length header?
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Old 05-25-15, 01:56 PM   #77
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

You won't miss the dudebro sound of inefficiency
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Old 05-25-15, 03:19 PM   #78
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

I own a 05 sti with this problem car leans out around 2500 to 3500. i have done an agency power top feed conversion with fuel rails kit, aeromotive FPR, ID2000's TGV deletes spacers. The stock fuel dampers r still on there as well should i remove them? I have been dealing with this problem for about a year now. Any help would be appreciated thanks
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Old 05-25-15, 04:39 PM   #79
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

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Originally Posted by 05_white_sti View Post
I own a 05 sti with this problem car leans out around 2500 to 3500. i have done an agency power top feed conversion with fuel rails kit, aeromotive FPR, ID2000's TGV deletes spacers. The stock fuel dampers r still on there as well should i remove them? I have been dealing with this problem for about a year now. Any help would be appreciated thanks
Grab a piece of fuel hose at the auto parts store, bypass it and see if it helps. You might need the Dorman connectors as per the 1st post.
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Old 05-25-15, 05:04 PM   #80
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Default Re: GR Stumble Mod Fix: GD Style Setup (not hose extension)

I would expect that the aeromotive fpr would do the job and so any standard dampeners could be removed. But I will will wait until some experienced users chime in.
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