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Registered:
June 2003
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Upgrade path for 3tgteu
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Thu, 06 November 2003 11:06
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Ok, looking at getting 200hp at the engine on a completely stock engine, stock pistons, how do I go about it.
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Location:
Brisbane
Registered:
May 2002
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Re: Upgrade path for 3tgteu
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Thu, 06 November 2003 11:18
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Easy peasy! Intercooler and a bleed valve should do it. 
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Registered:
June 2003
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Location:
NSW
Registered:
October 2003
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Re: Upgrade path for 3tgteu
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Thu, 06 November 2003 11:52
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| Norbie wrote on Thu, 06 November 2003 22:18 |
Easy peasy! Intercooler and a bleed valve should do it.
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A question, may sound stupid but what exactly does a bleed valve do?
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: Upgrade path for 3tgteu
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Thu, 06 November 2003 11:56
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Dude, you sound alot like "elite hayden" also known to post here???
Standard these motors have 160BHP, so with a bit more boost and fuel, 200 should be no problem. As Norbie said, install an intercooler and wind the bosst up. My recommendation would be to not wind the boost over 10-11 psi unless you want to start replacing pistons. To trick the computer into supplying more fuel for the associated boost, disconnect the vacuum hose from the fuel overboost sensor, but leave the electrical connection intact. This will result in the computer never realising it has gone past it's cutout of 7.3psi, and it will supply and regulate fuel to suit.
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: Upgrade path for 3tgteu
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Thu, 06 November 2003 12:01
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A bleed valve simply removes air (by "bleeding it off") from the wastegate. They can be set to bleed a certain amount off, resulting in the wastegate not opening till that pressure is reached on the following side of the valve.
My recommendation for exhaust would be a mandrel bent 2.5" system. With the turbo acting as a muffler also, you'll only need one good quality muffler in the system. 3" mandrel systems on 3TGTE's drone on the street, I know - mine does!
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Registered:
June 2003
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: Upgrade path for 3tgteu
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Thu, 06 November 2003 12:53
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No, fuel cut is 0.5bar (7.3psi). I've never run with a small exhaust on a 3TGTE, however another conversion I did for a friend with a small exhaust resulted in a dyno run of 115RWHP, while mine had 135 at the same standard boost.
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Registered:
June 2003
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Registered:
June 2003
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Re: Upgrade path for 3tgteu
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Mon, 10 November 2003 10:43
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Ok I'm not doubting what your saying, but from what everyone else has said, if you cool the air it becomes denser and you need more fuel to go with it, the ECU is a stupid ecu and if it sees 1psi it will inject enuff fuel for the 1psi(thinking its still the ct20), if you had a bigger turbo boosting at 1psi it will not be putting in enuff fuel for the higher flow, same with the intercooler, and also 3t doesnt have temp sensor and doesnt read the oxy sensor unless its in closed loop? so whats the story, can you explain your entire setup on gteu clint? eg, intercooler/turbo/injectors/ any mods, and power.
I think the engine is running quite rich anyway so this actaully might lean it out some.
Intercooler = need more fuel to go with the cooler air.
What sorta difference would i notice intercooling at 8psi on the ct20 with a series 4 rx7 bonnet intercooler, front mounted.?
[Updated on: Mon, 10 November 2003 10:45]
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Location:
NSW
Registered:
October 2003
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Re: Upgrade path for 3tgteu
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Mon, 10 November 2003 10:57
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I am running 400cc injectors in my 3TGTE and I am thinking about downgrading them back to standard before I put on the CT26 turbo and intercooler.
For me the injectors dont need to be upgraded, the standard ones would be safe for around 1 - 1.5 bar of boost with the new turbo and intercooler....right?
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Registered:
June 2003
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: Upgrade path for 3tgteu
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Tue, 11 November 2003 04:34
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You'd also need a new motor as the pistons won't take those boost pressures. Some people argue that an aftermarket computer tuned to within an inch of it's life will handle the situation, however, I'm not prepared to go through umpteen motors to get the tune right, stick to 10psi or go to forged pistons.
My setup is basically back to standard, with exception of the T28 hanging off the side. I run a modified AFM (spring modifications to lean it out a bit - I think this has to do with the better turbo as it only needed to be done when I put it on, but can't confirm this?), no intercooler, standard throttle body, fully rebuilt injectors, standard pistons, T28 running 7psi boost only, to give me 133.3 RWHP at @6000rpm. I find I need an LSD again, more than more boost.
When on boost the computer runs the motor extremely rich as standard, I've had a narrow band A/F Ratio Meter in the car to check it. I think you're worrying too much about fuel regulation under intercooled boost conditions, but I don't have enough experience to confirm this. You could try "geoff" (I think - going from memory), he seems to have some good infomation on 3TGTE and the "electrical" side of their workings.
I have run a standard motor on around 10psi without an intercooler without any problems, but wouldn't go past that.
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Location:
Brisbane
Registered:
May 2002
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Re: Upgrade path for 3tgteu
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Tue, 11 November 2003 05:48
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| haydennz wrote on Mon, 10 November 2003 20:43 |
Intercooler = need more fuel to go with the cooler air.
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True, but remember the airflow meter is on the low-pressure side of the turbo, which means post-turbo air pressure and density is irrelevant as far as fuel metering goes. If you add an intercooler the inlet charge will be denser, but every single molecule of air still had to go through the airflow meter first, so the computer still knows how much fuel to inject!
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Registered:
June 2003
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Re: Upgrade path for 3tgteu
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Tue, 11 November 2003 10:58
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being a stupid ecu its guessing the temp of the charge, based on a ct20.. what would you expect power to be at with stock 7psi intercooled(small f/m, rx7 styles bonnet type front mounted) and 3" exhuast from turbo to ass end straight through, cams and CAI. 180bhp at the fly or is that a bit optimistic?
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Registered:
June 2003
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Re: Upgrade path for 3tgteu
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Fri, 14 November 2003 10:19
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bling bling bump
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