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Many Questions on turbo function!

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Old 08 May 2003, 08:01 am
Young Cruiser
Join Date: May 2003
Location: Pembroke, MA.
Posts: 90
Default Many Questions on turbo function!

I am a new owner of a turbo GT but not new to turbo mopars (I have had at least one continously since 85). I have a number of questions regarding this car;

1. My 2.2 turbo motors (and most other EFI cars I have run across) run open loop at Wide Open Throttle (WOT). Is this true for the turbo PT?

2. I have read on the forum hear that a number of you are running higher than stock boost. Does everyone also run either an A/F gauge or exhaust temp gauge to ensure that you are not leaning out the mixture at WOT? If you are not how are you keeping tabs? The statement that the fuel system can support 16psi of boost doesn't cut it if the car is running open loop at WOT.

3. Some one mentioned that there is no fuel pressure regulator on the fuel rail. I would assume that the PT is using a no return line system and has a regulator in the tank. If that is the case how is the fuel pressure being referenced to increasing manifold pressure? You need to increase the fuel pressure with boost to keep the same relative pressure differnce across the injectors.

4. Some one mentioned that the head gasket is only good to 15 psi of boost. Where did that piece of info come from? The turbo 2.2 easily would take 20 psi and the fact that the 2.4 turbo motor has been around in Stratus R/T's in Mexico since 96 I would think any head gasket issues would have been solved by now.

5. I have read here max boost pressure numbers all over the place. What is the max boost the stock ECM allows and how is it varied under differnt conditions?

6. Does anyone manufacturer an A-Pillar gauge pod for the PT? I want to install a boost gauge and either an A/F gauge or exhaust temp.

7. I have read a number of articles that the SRT-4 runs low 14 second quarters. Being that the turbo PT is only a couple of hundred pounds heavier I would have guessed that the PT would easily have been a high 14 second car. What is the best time anyone has run with a stock motor?
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Old 08 May 2003, 11:32 am
Regular Cruiser
Join Date: Dec 2002
Location: Half Moon Bay, CA, USA.
Posts: 114

Some onfo:
2. Any a/f gauge you install will require a second 02 sensor. Chrysler changed the voltage of the OE sensor, and it is not compatible with aftermarket sensors; therefore, any a/f gauge cannot read it.
5. 14 psi, definitely.
6. AutoMeter in black, 2-gauge or 3. PT Tuning has the same 2-gauge unit, and says it matches the interior color. It does not. I bought it, and it is much too light. Easily paintable. No one makes a single gauge pod.
Jumpin\' Joe
\'04 Porsche 911 GT3
\'01 Audi S8
\'05 Chevy 2500HD TurboDiesel
\'05 Suzuki SV650
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Old 09 May 2003, 03:36 pm
Cool Cruiser
Join Date: Apr 2003
Location: Ft.Lauderdale, FL.
Posts: 217
Send a message via AIM to Exhaust Depot

The return line is located in the rear with in the fuel pressure regulator/filter.

THer eis a constant 58 psi in our fuel line.

E.D. 3\" Turbo Back, , HKS SSBOV, GReddy-e01 Boost controller, Greddy E-manage fuel management, Blitz Turbo Timer, JE pistons, Ported Head, E.D. Large Frontmount Intercooler, E.D. Tubular manifold with t3/t4 (prototype), IPP coilovers, Limited Slip.
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