Mr Two, read this

http://www.perth-wrx.com/vb/showthre...ight=tuna+tech

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MY93 Impreza GX 1.8L, 0hp, 0nm

How is the factory FPR going to be better than the super well constructed SARD FPR at holding just a 1:1 ratio eg not using the sards ability to increase pressure.

I think that the SARD has got to be better at running just a 1:1 due to superior construction out of billet and higher quality fittings.

When rexes have spontaneously had lean outs who's to say it wasn't the factory FPR shitting itself.

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thats ok simon, you dont have to feel guilty for buying a sard fuel regulator. we all make mistakes.

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Long live the WRC

I don't feel bad at all. I would feel bad using a stock FPR at your power levels when its a 5c part made in china probably.

I see enough Sard FPR's on 700+hp cars to make sure that I sleep soundly at night. Also yet to see a 10 second wrx with a standard FPR.

Here is the 800hp roger clark car with its non standard FPR's as usual.

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comes down to an understanding of the equipment- if your not sure, by all means change it, but change it for the right reasons, not because a magazine thinks its a good idea.

the standard fpr is more capable then its given credit for, out of the 100,000's of EFI subaru's around the world, the failure rate would be minisquel, much less then failed fuel pumps, fuel blockages or aftermarket rails/accessories.

i would suggest this has a good reason, mainly the aftermarket inlet manifold, different injectors, and aftermarket fuel rails.
when the factory FPR is fitted to the factory rails, its understandable they were replaced, hardly rocket science.

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Long live the WRC

The RCMS car is also a technical showcase of what they can sell to customers who see shiney things and reach for their wallet.

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MY93 Impreza GX 1.8L, 0hp, 0nm

I like being able to see the fuel pressure on the gauge attached to my Sard. Which is something I could not do on the stock one. That alone is worth the small price of $200.

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If you had a MoTeC, you could run a $200 fuel pressure sender and log it on a laptop, or output it to a gauge.

the fuel pressure you are seeing is not the true fuel pressure, you also are unable to monitor this guage from within the car (somewhat pointless)

anyhow, what you really want to monitor is differential fuel pressure.
this fuel pressure value is the value of positive rail pressure against manifold pressure minus the return rail pressure.

the purpose of this is to see when you reach the ceiling of the fuel pump and to determine if your fuel pressure maintains its static pressure against manifold pressure. ie the rising rate. 43.5psi (299kpa) + 1bar positive mainfold pressure (14psi+), resulting in a true rail pressure reading of 57.5psi. (your guage will not display this value)

again, its an understanding of the equipment, not what looks fancy in a show car/magazine.

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Long live the WRC

Is the guage in the cabin or under the bonnet ?

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MY93 Impreza GX 1.8L, 0hp, 0nm