Max power on stock fuel rails converted into a return style system (FRS)
#1
Max power on stock fuel rails converted into a return style system (FRS)
AS title say, im looking into converting my stock fuel rails into a complete fuel return style to use with a walbro 255 and 1000cc injectors. does anyone know how efficient or the max power i can get out of the stock rails converted into a FRS. thanks in advance yes i searched lol and yes i do know that the aam or the cjm rails flow quote unquote 350% more fuel. im really just shooting for 500whp on a DYNODYNAMICS.
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I made 550whp on dd and then retuned on a dj made 712 whp with stock rails and 880cc injectors. I am running the aam basic fuel return and a custom feed line which consists of a -6 an line from the oem tank (which has a walbro 255 in it) to a bosch 044 inline pump to the rails. Hope that helps.
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I'm running 550 rwhp & tq with a stanard aps return system (from the kit) and 800cc injectors. I still have plenty of room to spare. This is with stock rails and lines, the rturn is on the fuel tank.
Last edited by captj3; 11-22-2010 at 06:02 AM.
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I used the OEM rails, and it worked out well:
If you plan on welding the -an fittings to the ends, make sure the person is very good with the tig welder. The rails have a zinc coating on them, and that will have to be gound down for a proper weld.
If you plan on welding the -an fittings to the ends, make sure the person is very good with the tig welder. The rails have a zinc coating on them, and that will have to be gound down for a proper weld.
Last edited by Boosted Performance; 11-22-2010 at 08:11 AM.
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your restriction is the supply line. It's 5/16" which is tiny.
Jtgli is also running twin pumps so you can't use that if you are using a single walbro.
My single walbro on a full return system with stock rails was up to 451hp on a DD dyno. After that the walbro couldn't keep up. I had 800cc injectors and was far from maxing it. You won't need close to 1000cc injectors for 500hp.
If you upgrade your supply line and run a second pump you can get more. The problem will be the single walbro.
Jtgli is also running twin pumps so you can't use that if you are using a single walbro.
My single walbro on a full return system with stock rails was up to 451hp on a DD dyno. After that the walbro couldn't keep up. I had 800cc injectors and was far from maxing it. You won't need close to 1000cc injectors for 500hp.
If you upgrade your supply line and run a second pump you can get more. The problem will be the single walbro.
#10
your restriction is the supply line. It's 5/16" which is tiny.
Jtgli is also running twin pumps so you can't use that if you are using a single walbro.
My single walbro on a full return system with stock rails was up to 451hp on a DD dyno. After that the walbro couldn't keep up. I had 800cc injectors and was far from maxing it. You won't need close to 1000cc injectors for 500hp.If you upgrade your supply line and run a second pump you can get more. The problem will be the single walbro.
Jtgli is also running twin pumps so you can't use that if you are using a single walbro.
My single walbro on a full return system with stock rails was up to 451hp on a DD dyno. After that the walbro couldn't keep up. I had 800cc injectors and was far from maxing it. You won't need close to 1000cc injectors for 500hp.If you upgrade your supply line and run a second pump you can get more. The problem will be the single walbro.
okay, i might have a new for sale thread then lol
#11
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the stock rails are probably larger inside than ours or AAMs. the issue with stock rails is the pipes feeding them. the reason people get billet rails is because you dont have to weld proper fittings on them. some people want to just weld fittings on... that works too. but any VQ rail, including stock, that i have seen, is more than large enough on the inside.
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im making 450whp on 10 psi on a mustang dyno with 440 cc injectors and meth injection. add 10% for dj readings is 495 so between 450-495 is running safe on my block, with no return and im not maxxing out my injectors. because people get all bent out of shape about fabricating dyno #'s to stay on the unbias side. 10 psi - stock fuel system.
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im making 450whp on 10 psi on a mustang dyno with 440 cc injectors and meth injection. add 10% for dj readings is 495 so between 450-495 is running safe on my block, with no return and im not maxxing out my injectors. because people get all bent out of shape about fabricating dyno #'s to stay on the unbias side. 10 psi - stock fuel system.
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im making 450whp on 10 psi on a mustang dyno with 440 cc injectors and meth injection. add 10% for dj readings is 495 so between 450-495 is running safe on my block, with no return and im not maxxing out my injectors. because people get all bent out of shape about fabricating dyno #'s to stay on the unbias side. 10 psi - stock fuel system.
That's how people get more use out of a single pump, use meth.
so basically 440's on meth are like 528cc injectors on straight pump.