Johneturbo
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| posted on 3/7/15 at 04:14 PM |
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fuel pressure regulator adjustable or fixed?
noon,
What fuelpressure regulators are people using, ive been running one of the fancy looking ones with the gauge that you can get on ebay.
but i don't now have any confidence in it after removing my fuel lines to take the engine out when i fitted everything back the gauge after
pressure was saying 40psi ish which is rougly to the psi what i need but after a drive it was apparent something was wrong
lots popping hesitation once back i connected the PCV and the AFR was saying 22 which is way lean so increased the pressure to get it back up and
everything was fine.
so i think i'd like to run a fixed reg to say 3bar which is about 44psi?
any reccomendations on a good fixed reg? i was thinking about the FSE adjustable but searching on here baily motorsport said they'd taken them
off some customers cars.
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cloudy
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| posted on 3/7/15 at 04:27 PM |
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Have you cut the end off the rubber grommet on the gauge? The ebay ones need that opening in order to give a reference pressure I believe
(That's what it was when I last ran into that issue)
James
www.warnercars.com
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Johneturbo
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| posted on 3/7/15 at 04:32 PM |
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no i've not, the gauge was already fixed to the regulator where exactly is this rubber grommit is it between the reg and the gauge
the reg has been on the car about 3 yrs now so it's done well just wonder how accurate it really is, just don't know if i really need a
adjustable one really.
when i did the ZZ14 converstion there were so many extra bits i needed from the R1 that this reg did the job at the time!
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jeffw
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| posted on 3/7/15 at 04:48 PM |
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Fixed all the way. I run 3.5Bar Bosch FPR
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MikeRJ
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| posted on 3/7/15 at 05:01 PM |
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The unbranded cheap eBay jobs with the pressure gauge are usually complete crap. They tend not to regulate very well at all, so you may find pressure
changes according to fuel flow.
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cloudy
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| posted on 3/7/15 at 05:43 PM |
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If yours has one, it's visible on top here:
www.warnercars.com
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mark chandler
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| posted on 3/7/15 at 06:15 PM |
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OEM on mine, I do have a posh looking one in the drawer incase I need to overrun my injectors but running at 100% at WOT is still within the window.
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cloudy
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| posted on 3/7/15 at 06:59 PM |
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not even boost referenced Mark?
www.warnercars.com
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mark chandler
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| posted on 3/7/15 at 07:48 PM |
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Just the standard fireblade FPR, at the end of the day it's a diaphragm and needle so under boost it raises the pressure.
Car was mapped with it, been fine for the last 5 years 
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daniel mason
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| posted on 3/7/15 at 07:58 PM |
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I run a fixed Bosch like Jeff W.
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Ben_Copeland
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| posted on 3/7/15 at 08:06 PM |
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Fixed 3.5bar OEM one on the rail. Cheap eBay crap should be avoided. I had one and binned it
Ben
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mackei23b
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| posted on 3/7/15 at 08:39 PM |
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OEM Bocsh 3 bar for me housed in a jenvey mounting.
Cheers
Ian
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Johneturbo
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| posted on 4/7/15 at 08:51 AM |
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Cloudy, mine doesn't have a grommet it's not even an oil filled gauge.
i'm going to go with a fixed bosch one, as it seems reccomended by a few on here
i just need to decide on 3bar or 3.5 i need to double check what pressure i need i think about 44psi which would be around 3
if it had a bit more pressure would that be ok rather than to little pressure
nice one all
edited to add yes i need 44psi so 3 bar then? well 3 bar is 43.5 psi would that be ok
looking at them bosch regs what fittings do they take?
[Edited on 4/7/15 by Johneturbo]
[Edited on 4/7/15 by Johneturbo]
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Johneturbo
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| posted on 5/7/15 at 09:54 AM |
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been looking at bosch fixed regs but the ones I've seen have a strange fitting unless I've been looking at the wrong ones!
any links to the ones most peeps are using
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40inches
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| posted on 5/7/15 at 10:07 AM |
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I think the problem is that the Bosch FPR is designed to bolt on a flange fitted directly on the OEM fuel rail, so no barbed fitting
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jeffw
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| posted on 5/7/15 at 10:37 AM |
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Actually I lied to you, I have the Weber Alpha fixed FPR.
http://atspeedracing.co.uk/products/index.php?main_page=index&cPath=8_9
[Edited on 5/7/15 by jeffw]
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Johneturbo
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| posted on 5/7/15 at 11:30 AM |
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thanks guys i thought i was being a numpty with not seeing one with normal tails!
nice one Jeff i forgive you
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Johneturbo
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| posted on 5/7/15 at 01:57 PM |
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These regs are a little different to mine as i only have two unions on mine which i had to T off as i need a return to the tank
with these ones is it fuel in from pump fuel to rail and the other one is the return?
Also i need 44psi 3bar is 43.5 is it worth me having a bit more pressure? but would 3.5 be to much which is 50psi
[Edited on 5/7/15 by Johneturbo]
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jeffw
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| posted on 5/7/15 at 02:04 PM |
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As long as the car is mapped with the bar rating you have it isn't a problem. 3.5bar gives slightly better spray pattern and also gives a
little more overhead in utilisation.
Specifically this one
http://atspeedracing.co.uk/products/index.php?main_page=product_info&cPath=8_9&products_id=363
[Edited on 5/7/15 by jeffw]
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Johneturbo
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| posted on 5/7/15 at 02:18 PM |
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Ok a few psi more shouldn't be a issue then and i'll run the autotune to alter the map slightly
the one you have i guess you have a return to the tank from the fuel rail? mine doesn't so i'm asuming the one with the extra union would
be my return then
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jeffw
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| posted on 5/7/15 at 05:09 PM |
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Err no....
Fuel flow on mine it
Tank - LP filter - LP Pump - swirl pot - HP filter - HP pump - fuel rail - regulator - swirl pot - tank
[Edited on 5/7/15 by jeffw]
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Johneturbo
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| posted on 5/7/15 at 10:40 PM |
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Ahh a little bit different to mine then!
mine is tank-HP fuel pump-HP filter- fuel reg - fuel rail and from the fuel reg back to the tank
I had to T off the reg to feed the fuel rail which is why I'm thinking the one with the twin outlets might be better as then I won't have
to fit a T to feed the rail, which is an extra connection that could leak!
and the bottom union I guess would be the return to the tank
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jeffw
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| posted on 6/7/15 at 05:11 AM |
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It is normal to have the FPR after the fuel rail.
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Johneturbo
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| posted on 6/7/15 at 07:55 AM |
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But my fuel rail doesn't have a return, not sure how I'd plumb it in otherwise
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jeffw
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| posted on 6/7/15 at 08:44 AM |
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Ahhh....dead end rail. OK then your solution would work but I'd change the fuel rail I think.
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