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Location: Gold Coast
Registered: May 2002
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1JZ Twin Dump Overboost Correction
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Tue, 30 December 2003 22:51
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Well, I take back all the information about the overboosting on my 1JZGTE. What I said was wrong and incorrect. I've solved the problem.
Fuel Filter..
DON'T GET MONKEYS TO SERVICE YOUR CAR!
I got a service done awhile ago that included changing the fuel filter.
They put in the wrong filter (from a mk2 by the looks) and also hooked it up backwards!!
Seems over time the Walbro pump half collasped the filter element and blocked fuel. The engine was running lean causing EGT's to sky rocket causing the turbos to overspeed.
All I can say is I was wonderfully wrong!
I'll be putting it on the dyno soon to see what twin dumps, bar&plate cooler and 0.9bar does. WOOT
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I supported Toymods
Location: I renounced punctuation
Registered: May 2002
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Re: 1JZ Twin Dump Overboost Correction
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Tue, 30 December 2003 23:00

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So was it the fuel filter that was causing your car to not run?
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Location: Gold Coast
Registered: May 2002
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Re: 1JZ Twin Dump Overboost Correction
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Tue, 30 December 2003 23:55

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Yup, I'd say it collasped more and just didn't have fuel pessure for it to run. Lucky..
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Location: Brisbane
Registered: May 2002
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Re: 1JZ Twin Dump Overboost Correction
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Wed, 31 December 2003 01:26

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You should do what I do, and run no fuel filter at all!
Or even better, never ever send your pride and joy to a mechanic again. I wouldn't take the risk with mine.
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Location: Gold Coast
Registered: May 2002
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Re: 1JZ Twin Dump Overboost Correction
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Wed, 31 December 2003 01:30

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Norbie, when I took out my Walbro you should have seen the shit in the filter on the bottom... holy shatnaz! I need to goto PetroJet and get another filter! I'll show you next time you are down.
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Location: Brisbane
Registered: May 2002
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Re: 1JZ Twin Dump Overboost Correction
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Wed, 31 December 2003 01:38

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OK, so maybe I should install a filter one day...
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I supported Toymods
Location: I renounced punctuation
Registered: May 2002
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Re: 1JZ Twin Dump Overboost Correction
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Wed, 31 December 2003 02:00

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Is there any way to run a strainer type filter on your in tank pumps? Something like a 100 micron one?
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Location: Gold Coast
Registered: May 2002
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Re: 1JZ Twin Dump Overboost Correction
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Wed, 31 December 2003 02:11

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not sure what you mean, my Walbro has it's own filter, seems VERY filtery! 
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Location: sunny coast, qld
Registered: October 2002
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Re: 1JZ Twin Dump Overboost Correction
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Wed, 31 December 2003 03:13

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Sounds good mate.
So you would recommend the twin dump pipe upgrade to people who are after 250rwkw or less now?
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Location: Perth
Registered: April 2003
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Re: 1JZ Twin Dump Overboost Correction
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Sat, 03 January 2004 02:50

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i'm interested to see your results, my twin dump pipes are going on soon, and running a very similar set up (except more boost from CT9 steel ex. wheels) and A340E transmission..
good luck!
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Location: Melbourne
Registered: May 2002
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Re: 1JZ Twin Dump Overboost Correction
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Sat, 03 January 2004 03:05

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Norbie wrote on Wed, 31 December 2003 12:26 | You should do what I do, and run no fuel filter at all!
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VERY BAD no love from your injectors!
Quote: |
Or even better, never ever send your pride and joy to a mechanic again. I wouldn't take the risk with mine.
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Now that is a good idea! i dont trust anyone sence i had an auto fitted without loctite on the drive plate bolts 
recently i trusted a well known race suspension place to fit my lower controll arm bushes (as i dont yet have a press) crawled under it the other day and noticed split pin missing from the RH lower baljoint! it only takes one little thing to cause a major fuck-up
Allan
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Location: Launceston, Tasmania
Registered: October 2003
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Re: 1JZ Twin Dump Overboost Correction
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Sat, 03 January 2004 05:02
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jzz30: How much did the exhaust wheel upgrade cost???? I've blown one of my ct12a's and I'm putting another one on but I'd like to put steel exh. wheels on as well. Are they hard to come by?? What about spool up time is that the same?? Compressor upgrade?? Grrrrrr. I'm keeping the ct12's because I like the minimal spool up time etc.
Rich
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