just wondering whats the smallest good quality fuel pump to feed a 650 holley?
the carter im useing it to big (hangs to low) to mount near the bottom rear (front) monting bolt of the trailing arm.
what are you useing and where is it installed??
electric fuel pumps.
Started by
_76lxJAS_
, Sep 01 2013 04:35 PM
15 replies to this topic
#2
_Bomber Watson_
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Posted 01 September 2013 - 04:38 PM
Stock mechanical pump?
6psi facet?
Cheers.
#3
_76lxJAS_
_76lxJAS_
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Posted 01 September 2013 - 04:42 PM
how good are the facet apart from being noisy?
will they supply enough?
just browsing ebay.
facet are only good for small engines 200 to 250 hp.
i should be over that.
Edited by 76lxJAS, 01 September 2013 - 04:43 PM.
#4
_Bomber Watson_
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Posted 01 September 2013 - 04:59 PM
All you asked is what kinda pump to feed a 650 holley?
Pretty easy to feed one sitting on the bench, a bit more info might be required if you actually want some usable info?
#5
dattoman
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Posted 01 September 2013 - 05:22 PM
If your running a 650 you probably have less than 400 hp so as Bomber says a hi volume mechanical pump would do the job... or if your keen to stay electric... use a small pump as a lift pump to get the fuel out of the tank... like the facet maybe... then use the Carter to push it forward... maybe that will give you more mounting options.
#6
_76lxJAS_
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Posted 01 September 2013 - 06:55 PM
Hopeing to go a inline facet pump. Any1 running these?
There a much smaller cylinder style.
Im needing a pump to mount at the rear of the car. Capable of feeing enough fuel to a 650 holley on a stroked 308.
There a much smaller cylinder style.
Im needing a pump to mount at the rear of the car. Capable of feeing enough fuel to a 650 holley on a stroked 308.
#7
_TorYoda_
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Posted 01 September 2013 - 06:59 PM
A lot more than 400HP can be made through a 650cfm holley...... Best I have managed was 469 at the wheels (522 engine) using a 660 center squirter. Not on topic but just saying it can be done.
In the LH I had I mounted the Carters in the diff cavity, just either side of the center. Away from the 3" tailpipes yet still left clearance for the diff itself.
The other compact option is an inline injection style pump like a Bosh 044 or similar but you'll need a good regulator.
Edited by TorYoda, 01 September 2013 - 07:01 PM.
#8
_76lxJAS_
_76lxJAS_
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Posted 01 September 2013 - 07:51 PM
Im keen on the carter inline pumps just need comfirm if there big enough?/ supply enough fuel.
#9
_Bomber Watson_
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Posted 01 September 2013 - 08:00 PM
.5lb/HP-hour on pump fuel or there abouts.
Petrol weighs about 6.2lb/gal.
So for example, if your making 450hp that is 225lb/hr you need.
225/6.2 = 36gph.
36gph = 163 liters per hour.
163 lph = 2.7 liters per minute....
If you actually know what kinda power your looking at, besides "650 holley on a stroked 308" then you can work it out properly....but theres some rough numbers for you, give or take a bit.
Cheers.
#10
_76lxJAS_
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Posted 01 September 2013 - 08:52 PM
Awsome. Thats very intersting.
So lets say I buy a 36gph pump. How much is lost over the length front to back?
So lets say I buy a 36gph pump. How much is lost over the length front to back?
#11
_Bomber Watson_
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Posted 01 September 2013 - 09:01 PM
Assuming the pump supplies 36gph at 8psi or so should be negligible.
Remember as pressure goes up flow drops down.
Very few aspirated holden v8 strokers actually make that much so one would think it would be dine, alas we still know nothing about your engine.
Remember as pressure goes up flow drops down.
Very few aspirated holden v8 strokers actually make that much so one would think it would be dine, alas we still know nothing about your engine.
#12
View GaragePosted 02 September 2013 - 06:51 AM
Remember too that with a carb (as opposed to injection) your fuel pump does not actually need to keep up engine demands at wide open throttle - all it needs to be able to do is keep the fuel bowl(s) full enough for the longest wide open throttle run. The bigger the fuel bowl, the less the pump has to make up for.
I have one of the Carter 4070s (72gph from memory) which completely solved the problem I had with the Quadrajet emptying its small fuel bowl at wide open throttle.
I have one of the Carter 4070s (72gph from memory) which completely solved the problem I had with the Quadrajet emptying its small fuel bowl at wide open throttle.
#13
_76lxJAS_
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Posted 03 September 2013 - 12:13 PM
ok i just stuck with the carter 100gph 4601hp that i was running.
located it through the floor just under the back seat.
it will do until i can find a pump equivalent to a holley blue or this carter that doesnt have to be mounted verticaly.
#14
Posted 03 September 2013 - 04:49 PM
Mine's above the diff, never had any issues.
Some people use EFI pumps like Bosch 044s, way overkill on pressure but seems like a decent regulator must handle it.
Some people use EFI pumps like Bosch 044s, way overkill on pressure but seems like a decent regulator must handle it.
#15
Struggler
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Posted 04 September 2013 - 09:47 AM
I have had a lot of success with the Pierburg style pumps, 6psi, small and quiet. Flow enough to run 11.0's at 121mph in an HQ with standard fuel lines. Fit really nicely under the back seat area.
http://www.ebay.com....L-/231046135667
I was buying them through Ashdowns (an auto-electrical wholesaler).
JMHO
#16
_greenmachine215_
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Posted 15 September 2013 - 12:19 AM
BAHAHAHAHAHA ClassicAll you asked is what kinda pump to feed a 650 holley?
Pretty easy to feed one sitting on the bench, a bit more info might be required if you actually want some usable info?
Moving on, I just run a carter black and a bosch 044 then run it through a bypass regulator so it's still at 6psi
and bomber would probably say that's overkill and gay as aids lol
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