Evenin all...

I used Hayabusa TB's on the RS4. These don't have a fuel return and I'm struggling to afford fancy double-ended billet ones!

Is there anything stopping me from using the standard ones as per the following diagram? Surely the regulator would ensure that there was a constant pressure 'upstream'?


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Should be fine, all you're doing is regulating the pressure in the rails....

Cheers Pete... so what makes double-ended fuel rails so attractive? Neatness?

It'll be fine, but FPRs usually only have inlet and outlet. Your setup is more likely to look like this:
Rescued attachment Clipboard02.jpg

Thanks Matt... that makes sense!

quote:

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Originally posted by scootz
Cheers Pete... so what makes double-ended fuel rails so attractive? Neatness?

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Thanks! What's the knock on effect in real-world use?

don't the Hayabusa rails have FPR's at the end of the them? (my R6 iTB'd did) isn't it usually carb rails that don't have returns?

Nope... just the one in / out.

can you not tap the end of the 'busa rail?

Fuel Rail Supplier..

http://www.americanv8engines.co.uk/shop/product_info.php? cPath=13_16&products_id=85

Thanks for that Steve!

Slightly cheaper supplier LINKY DINKY DOO DAH
Even if you only buy the minimum quantity , it's still cheaper than buying it in England

*postage from the states last time I bought some was just over £20 for three feet

[Edited on 9/4/10 by clairetoo]

The Corvette for example with the LSx V8 series of engines have a combined filter/FPR mounted by the fuel tank. Then a single line goes forward to the fuel rail.

I'm using one of these on an LS1 I'm installing in an RX7. You can get them for about $40 in the states but you will also need some corresponding GM quick connectors to attach the hoses.

Link to some details about it