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Old 11-01-2013, 10:52 PM   #1
robbbert22
Scooby Newbie
 
Member#: 257741
Join Date: Sep 2010
Unhappy something sticking ? late spooling problem HELP!

I think its waste gate problem but it looks ok...

Problem is, i have a tome8265 turbo. give or take 100% throttle, car will start boosting and hit 22 psi from 3800 to 4000 rpms then waste gates open and car doesnt take off until about 4800 then you feel it.
the feeling is basically like your flooring your car at 2k rpms... the car doesnt go anywhere until say 3k really on stock turbo. it feels like that.

mods,
Tomei 8265
id1000cc injectors
tial 44mm ewg
grimspeed ebcs
aem fuel pump
custom i/c piping
perrin inlet.
tbe
spt short ram

tuned first time, this time by my buddy. dont judge the tuning. it happens with all tunes.

this problem was not there, until the wastegate flange on up-pipe cracked and re-welded it.

checked
turbo looks good, no oil, no smoke, no shaft play, spins freely.
ebcs( disconnected ) and ran at stock boost no wastegate flutter, and still delayed
Ewg, no rips, no over or under boosting when its opened 22lbs right to redline and made very good power

no boost leaks in i/c pipeing or inlet
no exhaust leaks.
intake filter is a bit dirty.... dont see how it would impact that much
compression is good

im more or less curious if anyone else had this problem or seen it before. because all logical explainations i have i am stumped

this is what i found, but it was his internal... i am external.
http://forums.evolutionm.net/evo-eng...l-up-help.html

Easiest way i can put it is, like your brake boosting..... with out hitting the brake lol.

video from flooring it, as you can see its boosting but there is almost no power and doesnt pull.
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Old 04-04-2014, 05:05 PM   #2
mpilato77
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Member#: 122206
Join Date: Aug 2006
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This may be completely unrelated. But I had a similar issue, and I couldn't figure out where the power was going. Turned out I had a seized caliper.
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Old 04-07-2014, 04:11 PM   #3
zman8023
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Member#: 310494
Join Date: Feb 2012
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So the problem has worked itself out and you are simply trying to figure out why the problem occurred at all?

Just trying to get an idea of where you stand now....
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Old 04-08-2014, 01:57 AM   #4
Back Road Runner
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Member#: 60082
Join Date: Apr 2004
Chapter/Region: MWSOC
Location: Minnesota
Vehicle:
2004 Forester STI
Silver

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Well, you have 22psi on the intake, so it's kind of tough to say something's missing. I can't really tell you from a video. I don't really see anything wrong. It spools and sits at boost, and the car accelerates. It's a high gear, so it's not going to really do anything quickly. There are also delayed behaviors at work like the throttle and wastegate that change depending on how you applied the throttle. For example, you will get completely different behavior if you are at light throttle and then floor it versus fully letting off the throttle and then flooring it. It kind of depends on what you do. I don't know if it's just a matter of expectation or if the ECU is doing something. It would be useful to have a copy of the tune as well as some datalogs to see if it's doing anything goofy. Also, are you expecting any particular type of behavior in this 3000-4000 rpm range?
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