r1_pete
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| posted on 1/7/10 at 06:21 PM |
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Adjustable fuel pressure regulators worth it??
Are adjustable fuel pressure regulators worth investing in?
Everything I read talks of 45 PSI (3 Bar) most standard systems run at the same pressure, so is the extra expense really worth it??
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RichardK
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| posted on 1/7/10 at 06:24 PM |
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Im pretty sure that the really cheap ones can also affect the flow rate which can also cause problems so keep that in mind mate.
Cheers
Rich
Gallery updated 11/01/2011
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greenmarcus
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| posted on 1/7/10 at 06:38 PM |
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adjustable fuel regulators
Are you running fuel injection or carbs.
I have a holley regulator fitted which cost equ 100 pounds which I'm running on a kent engine with twin weber 40's
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omega0684
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| posted on 1/7/10 at 06:48 PM |
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i bought a £30 off ebay and it did the job i needed it to.
now i have upgraded to Jenvey system though i have gone for a sytec one (mucho dollar!)
I love Pinto's, even if i did get mine from P&O!
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r1_pete
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| posted on 1/7/10 at 07:06 PM |
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Its for injection, 6 x gsxr 750 TB's with twin injectors.
Trying to keep the costs down - Mega saving so I can quit work and do something I enjoy...
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will121
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| posted on 1/7/10 at 07:41 PM |
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are you going to use the gsxr injectors/modified fuel rail? it may just be easier to fit a adjustable regulator ratherthan incorperate an orignal one,
also gives option of adjusting fuel pressure if you run into problems with capacity of injectors. finally ive got one of the £30 ebay ones and seems
to work fine
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indykid
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| posted on 1/7/10 at 07:47 PM |
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if you're running an aftermarket ecu, it's
easier to adjust the injector duty cycle to the point where your injectors won't flow enough.
at which point, bigger injectors or higher rail pressure gives you the required fuelling
if your AFRs are good without one, you won't gain anything with one
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paulf
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| posted on 1/7/10 at 08:21 PM |
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I have a fixed regulator I made by fitting an escort one into a machined housing, demon tweeks sell the same sort of thing with a choice of capsules
to vary pressure.Mine is 2.7 bar and the injectors run at about 80% duty cycle so have never had the need to adjust it but could change the capsule
for a higher rated one if required.Adjustment is ok but it is also another setting to have to adjust and able to go out of adjustment.
Paul
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BenB
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| posted on 1/7/10 at 08:24 PM |
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As said, if you're using an OEM rail it's easy to use the standard injector and regulator combo. Most systems run at 2.5 bar, some at 3.
An adjustable one can be used to bodge a fix if you run out of duty cycle on your injectors (ie up the pressure rather than going to bigger injectors)
but it's only a small difference. I'd want max duty of 90%.
I personally only bought an adjustable one because it was a relative pressure regulator (ie it would cope with forced induction)..... If I could find
a relative 2.5 or 3 bar fixed I would have probably just used that...
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paulf
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| posted on 1/7/10 at 08:43 PM |
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I removed the reg from the OEM fuel rail and machined an alloy housing to fit it into, relatively easy to do if you have a lathe handy.It is a Bosch
regulator capsule and they are available in various ratings so an easy way to get adjustment if required.
Paul.
quote:
Originally posted by BenB
As said, if you're using an OEM rail it's easy to use the standard injector and regulator combo. Most systems run at 2.5 bar, some at 3.
An adjustable one can be used to bodge a fix if you run out of duty cycle on your injectors (ie up the pressure rather than going to bigger injectors)
but it's only a small difference. I'd want max duty of 90%.
I personally only bought an adjustable one because it was a relative pressure regulator (ie it would cope with forced induction)..... If I could find
a relative 2.5 or 3 bar fixed I would have probably just used that...
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v8kid
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| posted on 2/7/10 at 08:42 AM |
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I'm getting over 400hp with a cheapo ebay one. When I bought it I cleaned up the internal.machining as it was a bit rough - basically smoothed
all the flow passages.
Why spend more? On the other hand I may just have been lucky!
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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