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post #1 of 11 Old March 21st, 2011, 02:01 PM Thread Starter
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Max Safe PSI On Stock Internals

anyone know what the max boost you can run on stock internals with a fmu, cold air, 3" exhaust? thanks for the help guys. BTW its an 84 model if that makes a difference
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post #2 of 11 Old March 21st, 2011, 09:20 PM
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17/18 psi.

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post #3 of 11 Old March 22nd, 2011, 12:10 AM
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If the stock internals are your limit, then much more than that. The factory SVO engines are forged, and have seen 500+ on many cars. If you have a factory fuel system then HMUSN hit the nail on the head. If you have an adjustable FPR and better than factory fuel pump you can up the fuel pressure and push the factory injectors to handle more boost but the factory turbo on your car will get in it's own way above 23-24 psi.

With fmu, did you mean a front mount intercooler? FMIC?

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post #4 of 11 Old March 22nd, 2011, 07:53 AM
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Pretty sure he meant a fuel management unit, but even being able to crank up the fuel pressure isn't going to do any good if the pump and injectors can't flow to compete.

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post #5 of 11 Old March 22nd, 2011, 10:09 AM Thread Starter
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yes i meant fuel managment, and i do have an upgraded fuel pump. im using this car as a dd and just dont want to push it past its limits
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post #6 of 11 Old March 22nd, 2011, 07:59 PM
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If you don't want to risk it keep it below 18psi.

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post #7 of 11 Old March 23rd, 2011, 05:29 PM Thread Starter
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thanks. Thats what i needed to know
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post #8 of 11 Old July 7th, 2011, 08:29 AM
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so, with fuel upgrades, you can run 23+psi on the SVO?

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post #9 of 11 Old July 8th, 2011, 12:50 AM
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There are some that have run higher than that with factory internal parts, but they never last long as in less than a dozen trips to the drag strip. But yes if you have enough fuel pump and injectors and a way to tune for them to keep the car from going lean you can run a lot of boost.

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post #10 of 11 Old July 8th, 2011, 12:54 AM
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Quote:
Originally Posted by jjpluml View Post
anyone know what the max boost you can run on stock internals with a fmu, cold air, 3" exhaust? thanks for the help guys. BTW its an 84 model if that makes a difference
I'd like to point out that with any original 2.3T computer it already has programming to increase fuel flow with boost. If you add a fuel management unit it will just be in the way of the factory computer settings. All you really need is a bigger than factory pump, like a Walbro 255lph in tank and AFPR. The factory injectors should flow enough to support around 300whp.

Also, with a really good FMIC you can get away with a littl more boost on factory fuel equipment because of the cooler air charge.

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post #11 of 11 Old October 10th, 2011, 03:01 AM
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Hey guys, I got a 84 Gt Turbo, and was wondering whats the stock PSI of the turbo and how much PSI can my engine handle (its all stock at this point, internals and all).
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