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fuel pressure regulator mounting

Posted By: mshred

fuel pressure regulator mounting - 04/22/12 05:13 PM

Hey guys,

Trying to get an idea of where and how to mount a single holley 803 non return style regulator. If anyone has any pics of this it would be greatly appreciated. I know a lot of guys mount them on the fenders, but was thinking of mounting it somewhere off the engine possibly? Not sure what is allowed though in the NHRA rules.

Any pics or insight would be great!

Thanks!
Matthew
Posted By: Ari440

Re: fuel pressure regulator mounting - 04/22/12 05:19 PM

Posted By: rickraw

Re: fuel pressure regulator mounting - 04/22/12 05:59 PM

here's mine

Attached picture 7174892-100_0014.jpg
Posted By: mshred

Re: fuel pressure regulator mounting - 04/22/12 06:02 PM

Quote:

here's mine



thats a cool little bracket...did you make it, or can you buy that from a manufacturer?
Posted By: rickraw

Re: fuel pressure regulator mounting - 04/22/12 06:08 PM

it was on there when i got the car. i beleive it's from magna flow
Posted By: sshemi

Re: fuel pressure regulator mounting - 04/22/12 06:45 PM

I bought one of those from jegs complete with fittings and tubing.
Not the best quality and fit, but ti works and looks good.
Posted By: Al_Alguire

Re: fuel pressure regulator mounting - 04/22/12 06:46 PM

On single carb set ups we always "hang" them by the carb from the lines. No reason to mount one anywhere else really, plus it get the reg as close as possible to the carb.


Posted By: mshred

Re: fuel pressure regulator mounting - 04/22/12 07:33 PM

Quote:

On single carb set ups we always "hang" them by the carb from the lines. No reason to mount one anywhere else really, plus it get the reg as close as possible to the carb.






I was never sure if hanging them without mounting them solid to something was acceptable. But if hanging them is okay, then that might be the best option it seems. Only thing is im using push lok, not stainless braided hose....should work similar though I would think and be able to support it
Posted By: nss guy

Re: fuel pressure regulator mounting - 04/22/12 10:25 PM

ideally you want to mount the regulator ahead (front) of the carb or carbs. with the reduced psi you don't want the g-forces keeping the fuel from the carb.
Posted By: Crizila

Re: fuel pressure regulator mounting - 04/22/12 10:50 PM

I think the only stipulation was a minimum of 6" in front of the firewall. I'm not a big fan of mounting the fuel press. reg solid to the engine in any way - but lots do it without a problem.

Attached picture 7175248-fuelgageline.jpg
Posted By: Cab_Burge

Re: fuel pressure regulator mounting - 04/22/12 11:18 PM

Quote:

ideally you want to mount the regulator ahead (front) of the carb or carbs. with the reduced psi you don't want the g-forces keeping the fuel from the carb.

Mount it on the elephant ears below the alternator or on the radiator support, on anything anywhere in front of the carb.
Posted By: Crizila

Re: fuel pressure regulator mounting - 04/23/12 03:43 AM

Supply and demand folks. If you have enough pressure an volume to the reg, it aint gonna make no difference which way that -6 or -8 line is pointing. Liquid doesn't compress. The pump might have to work a little bit harder, but if you have enough pump, it's gonna stay @ 7 psi. - or where ever you set it.
Posted By: Al_Alguire

Re: fuel pressure regulator mounting - 04/23/12 06:02 AM

I dont think ANYONE here is making enough steam to worry about the regulator being affected by Gforce..Just saying lets not over think this.
Posted By: Biginchmopar

Re: fuel pressure regulator mounting - 04/23/12 06:13 AM

A-Men!
Posted By: Crizila

Re: fuel pressure regulator mounting - 04/23/12 02:33 PM

Quote:

A-Men!

FoSho!
Posted By: CompWedgeEngines

Re: fuel pressure regulator mounting - 04/23/12 03:43 PM

shameless plug here...these work and look great..and yes I sell them.

Attached picture 7176087-Reglinekit.jpg
Posted By: mshred

Re: fuel pressure regulator mounting - 04/23/12 11:50 PM

Thanks for the pics guys! just trying to get some ideas if I end up running motor only and using only one reg. Todd, I will hit you up for that bracket if I do Still haven't decided if im going to strap on the cheater kit that I already have- I have the two regs and a magnafuel dual port log, just need to make up my mind
Posted By: chryco

Re: fuel pressure regulator mounting - 04/28/12 09:43 PM



I built a plate that came off the intake and has the reg mounted to it. Works for me.
Posted By: Islandcuda

Re: fuel pressure regulator mounting - 04/28/12 10:11 PM

I have my main line coming around the motor side of my distributor and have the regulator just floating on the 2 lines from the carb. No mounting no nothing, it just hangs there in mid air and hasn,t given me any problems in 7 or 8 years.
Posted By: jamesc

Re: fuel pressure regulator mounting - 04/28/12 10:23 PM

Quote:

ideally you want to mount the regulator ahead (front) of the carb or carbs. with the reduced psi you don't want the g-forces keeping the fuel from the carb.



believe me when i tell you that "problem" borders on urban legend along with the totally incorrect notion that the larger the diameter of the front to rear line makes this "problem" worse. the diameter has no effect with regards to any g-force impact it's the linear length that does.

water exerts roughly .433 psi per foot and the specific gravity of race fuels runs around .725-.750 so fuels exert about .320 psi per foot. this would mean if you have 10 linear feet of line parallel with the forward motion of the car and the car is accelerating at 1G there would be 3.2 PSI of back pressure. iirc a pro stock car averages about 1.5 g during the run which of course is higher at the hit and softer at the big end.

does it have an impact, yes, is it a problem for the vast majority of racers, no
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