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My tuner set my turbosmart fpr1200 up at 58psi with vac line off?? That right or it different with e85

Edited by CHLAXN
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<blockquote class='ipsBlockquote'data-author="IH8TOADS" data-cid="1346621" data-time="1357641006"><p>

If your injectors are seeing that pressure, that ain't cool. Most are only rated to 7 bar.</p></blockquote>

I assume they are seeing as that gauge is just before them :( so a new rail and reg would be good yeah?

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<blockquote class='ipsBlockquote'data-author="CHLAXN" data-cid="1346624" data-time="1357641257"><p>

My tuner set my turbosmart fpr1200 up at 58psi with vac line off?? That right or it different with e85</p></blockquote>

Sure is :-)

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<blockquote class='ipsBlockquote'data-author="Kosij" data-cid="1346630" data-time="1357641798"><p>

<blockquote class='ipsBlockquote'data-author="IH8TOADS" data-cid="1346621" data-time="1357641006"><p><br />

If your injectors are seeing that pressure, that ain't cool. Most are only rated to 7 bar.</p></blockquote><br />

<br />

I assume they are seeing as that gauge is just before them :( so a new rail and reg would be good yeah?</p></blockquote>

Would talk to your tuner, the injector scalars and/or airflow calibration would be seriously funky if you're seeing that pressure!

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Yeah I don't think it's that high, I read something about some fuel pres gauges reading high and inconsistently at different temps... Maybe test it at the same outlet with a gauge you know works.

If your getting stable fuel pressure from the stock reg then your ok, but alot if people have issues when using twin o44s on the stock reg... I ran twin o44s on stock reg for ages on my g6 without any dramas, but reliability wise I'd go for a rail and reg upgrade combo.

You getting cold feet marky? Lol

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im confused

what is the important part in terms of pressures should we be checking here?

rail pressure? injector pressure?

im lost

what should it be and what do I need to check?

after market rails and a regulator?

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A mechanical return style fuel system needs to have consistent differential pressure across the injector. With 15psi of boost in the cylinders acting against the injector pintle/director plate, you need an extra 15psi fuel pressure to maintain the same differential pressure....in the case of the XR6T that is 58psi or 4 bar. At idle when the car is in vacuum (naturally aspirated) you need less pressure on the rail side to maintain the same pressure drop.

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