wkdtime Posted August 21, 2006 Share Posted August 21, 2006 I have heard that when running big power there is a greater risk of blowing number 5 and 6 due to fuel starvation because of the one way rail design the Supra has, Is it more advisable to run a two way rail? Quote Link to comment Share on other sites More sharing options...
grahamc Posted August 21, 2006 Share Posted August 21, 2006 Your not the only to hear that. What sort of power do you need to hit before considering this, or is it adviseable right off the bat? Quote Link to comment Share on other sites More sharing options...
wkdtime Posted August 21, 2006 Author Share Posted August 21, 2006 Its more of a safety aspect for me. Basically going over 500RWHP its suggested that a two way fuel rail is reccomended but not neccessary. Want the fuelling to be more than adeqaute, bigger safety margin. Quote Link to comment Share on other sites More sharing options...
tDR Posted August 21, 2006 Share Posted August 21, 2006 All aftermarket rails are twin feed with centre return as far as I know. The stock rail is also meant to be fine in terms of flow capacity for high bhp once adapted to twin feed with centre return after drilling / tapping it for appropriate fittings. Cheers, Brian. Quote Link to comment Share on other sites More sharing options...
wkdtime Posted August 21, 2006 Author Share Posted August 21, 2006 Thanx Brian;) Quote Link to comment Share on other sites More sharing options...
terribleturner Posted August 21, 2006 Share Posted August 21, 2006 All aftermarket rails are twin feed with centre return as far as I know. The HKS purple one has it's return actually between 5 and 6 i think. Quote Link to comment Share on other sites More sharing options...
JohnA Posted August 22, 2006 Share Posted August 22, 2006 So are you guys saying that the pressure inside different parts of the fuel rail varies? Or that remote (compared to the return point) injector intakes cannot flow enough? I'd be quite surprised if this phenomenon could be experimentally confirmed, the rail doesn't look to me as though it has 'weak design spots' and it is not how liquids behave anyway. If fuel pressure is correct under full load, I'd look elsewhere for weak links. Quote Link to comment Share on other sites More sharing options...
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