what will i have to do to the SBC pump? or will that be revealed when i have it in front of me
Triple SU rebuild cost.
Started by
_judgelj_
, Dec 19 2012 01:54 PM
42 replies to this topic
#27
rodomo
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Posted 27 January 2013 - 09:31 PM
This will bolt straight in, no grinding, and do the job no worries.
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#28
_judgelj_
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Posted 28 January 2013 - 09:16 AM
Thanks mate, ill have a look on ebay for one. Wouldnt i be better off with an electrical pump? or is that too much volume?
#29
_stretchlc_
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Posted 28 January 2013 - 10:10 AM
Mechanical Pumps work well with SU's, if running a Holley Electric Pump you are definately going to need to run the regulator with it, as SU's have a real habit of spewing fuel out of the float bowls with any more than about 5psi of fuel pressure..........less is best in this case.
#30
_judgelj_
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Posted 28 January 2013 - 10:14 AM
Ok now that makes sense. Does a commodore fuel pump provide too little fuel pressure?
#31
warrenm
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Posted 29 January 2013 - 06:41 AM
The blue/black motor pumps supply enough fuel to keep up with a tough Holden 6. Unless you're going to use N2O or methanol I wouldn't use an electric pump.
#32
_judgelj_
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Posted 29 January 2013 - 03:11 PM
The blue/black motor pumps supply enough fuel to keep up with a tough Holden 6. Unless you're going to use N2O or methanol I wouldn't use an electric pump.
In that case is it even worth upgrading the mechanical pump?
#33
warrenm
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Posted 30 January 2013 - 06:19 AM
I only change to an electric pump when the mechanical one failed, which was well used when I fitted it to the engine in1999. It also run the car to the mid 13sec over the 1/4 mile. Holden fitted mechanical pumps to XU-1s as std, do I need to say any more? If you need to buy a pump, the Chev pump option is good value for similar money.
#34
orangeLJ
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Posted 30 January 2013 - 08:24 AM
I still run a standard mechanical pump (with holley low psi regulator) on my LJ (webers)
Ran a similar setup with my SU's (pusha nd turn reg on that one... not a fan now days though)
Ran a similar setup with my SU's (pusha nd turn reg on that one... not a fan now days though)
#35
_judgelj_
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Posted 30 January 2013 - 10:14 AM
Ok i see, what is the theory behind running a reg on a standard mech pump? Is it a precaution or does the pump put out more than is required?
#36
Dave6179
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Posted 01 February 2013 - 01:27 PM
I use the std glass bowl pump on my triple SU fed 202. Never had a problem with low fuel or too much fuel.
#37
orangeLJ
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Posted 04 February 2013 - 03:05 PM
too much pressure will overwhelm the needle and seat, and in SUs can make the AFRS all over the shop.
#38
_judgelj_
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Posted 04 February 2013 - 04:27 PM
Spose a cheap reg cant hurt. might make the engine bay look purrdy too.
#39
_parap187_
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Posted 19 April 2013 - 11:50 PM
Hey guys,
Whats the verdict with STD 186 Glass bowl fuel pump with 1 3/4" Triple SU's on Big Lift cam motor???
#40
_judgelj_
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Posted 20 April 2013 - 04:06 AM
im not sure, maybe someone else can advise.
on a separate note, picked them up yesty and they cost me 1400!
#41
_pgb73_
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Posted 21 April 2013 - 07:22 PM
Standard red fuel pump does the job nicely on mine.Keeps the original look as well.
#42
rodomo
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Posted 21 April 2013 - 10:43 PM
Standard red fuel pump does the job nicely on mine.Keeps the original look as well.
You're not drivin it hard enough! 
#43
Dave6179
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Posted 26 April 2013 - 07:19 AM
My std pump came off my 179, similar cam, smaller lungs.
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