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Holden 6 fuel pump flow rate

Started by _rb3torana_ , Aug 01 2014 05:10 PM

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34 replies to this topic

#26 _Bomber Watson_

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Posted 04 August 2014 - 06:43 PM

.

Honestly each to there own, considering you can buy ss braided hose from summit cheaper per meter than rubber hose locally, and once you add up brass fittings and good quality hose clamps, the price really isnt that different. Yes some of the bended fittings are a bit pricey, think the most expensive one on my car was like $30, but most are between $6 and $10, comparatively Norma stainless hose clamp = 2.50 and brass fitting = ~ $6-10.

Main benefits of the flash wanker stuff is when you need to remove a hose, instead of fighting and swearing for 20 minutes trying to get it off then ending up slitting it with a razor blade, thus making it to short to re use and having to go buy more ludicrously expensive hose from the auto shop to replace it you just pull out your equally wanky anodized aluminium spanners, give it a quick flick of the wrist then pull it off....Put one of your flash wank factor plastic an bungs in the hose, a flash wank factor plastic an cap over the fitting (both stupidly cheap) then you can go drink beer.

Cheers.

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#27 EunUCh

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Posted 04 August 2014 - 07:13 PM

probably about the most i would ever spend on fuel pressure reg. never had flooding problems with the SU's.

yet to invest in some hi tech gear to see what the dirty old std pump will do

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#28 SA EH

Another Holden 6 tragic

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Posted 04 August 2014 - 10:45 PM

Hey DJ, you made me just go & check my fuel system, in the cold dammit!
Holley sbc 130g/h mechanical pump run to a holley red (1 - 4psi) pressure reg with no return, high flow needle & seats in the hs6's, no fuel pissing out, no shortage of power & virtually no bling, save for braid to the su's.
That's with brass barbs & expensive blue hose, and yeah, I can understand why people use threaded fittings having had the thing apart a squillion times now...

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#29 _Bomber Watson_

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Posted 04 August 2014 - 10:56 PM

yeah im contemplating setups with the Holley pressure reg i have laying around mated with a 3/8 NPT-3/8NTP union to a bit of 40x40 alloy solid, about the same long, drilled through each way and threaded for 3/8 ntp in each hole to take the pressure reg and each of my existing fittings to the carbs.....See what i end up doing once the engine is back together and back in the car.

Cheers.

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#30 _oldjohnno_

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Posted 05 August 2014 - 06:55 AM

.

Honestly each to there own,

Agreed. Though I still think you're as flash as a rat with a gold tooth...

Try your local Gasweld or whatever, they'll probably have some aluminium 4 way blocks with 1/4" bsp ports for compressed air takeoffs. Pneumatics suppliers like Festo have some neat manifolds too. Or you can use a barbed cross, about as simple and as light as it gets:

$(KGrHqZ,!igFEE(ed1IjBRFtlU8Gi!~~60_12.J

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#31 _duggan208_

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Posted 05 December 2014 - 11:23 PM

Mechanical pumps are a good thing but how much power do that take out to run off the cam. I thought that we want to reduce friction as much as possible. I used to use a Holley red with 45 Webers. No so called wankey stuff just a pump and filter in the boot, never had any trouble, noisey bastard though. but the whole LC was noisey anyway. I think its bloody louder now.

Regards

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#32 EunUCh

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Posted 27 February 2015 - 03:43 PM

Don't know if a mechanical pump would pull all that much out of the engine considering the cam is 1-2 from crank, then there

is some leverage back to the lever as well?

Even with an electric pump there would be some drain on engine because pump uses electricity which comes from battery which

is charged by alternator which hopefully is driven by the engine.

Just doin some dreaming here....still

If the dirty old shitty stock pump delivers 40gph (as from another thread) and we allow a 10% drop in flow flow for every 1000 rpm increase starting at a baseline of 1000rpm being the max flow rate, by the time we get to 7000rpm the pump/line/valves the thing

is only flowing about 26gph or probably less or more..that is the unknown?..Who knows,maybe the losses start going upwards from

from 3500rpm to 12/14 or 16% or better as rpm increases?

Even if a 300hp 202@7000rpm pumping 20gph there would be no margin for the pump to keep up,it would be on it's limit.

So at 300hp the pump would very boderline,install a pump that has a 25%or better than max rated flow at those rpm considering

losses.

if any of that drivel makes sence :dontknow:

Edited by EunUCh, 27 February 2015 - 03:44 PM.

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#33 _oldjohnno_

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Posted 27 February 2015 - 05:30 PM

if the dirty old shitty stock pump delivers 40gph (as from another thread) and we allow a 10% drop in flow flow for every 1000 rpm increase starting at a baseline of 1000rpm being the max flow rate, by the time we get to 7000rpm the pump/line/valves the thing
is only flowing about 26gph or probably less or more..that is the unknown?..Who knows,maybe the losses start going upwards from

from 3500rpm to 12/14 or 16% or better as rpm increases?

Even if a 300hp 202@7000rpm pumping 20gph there would be no margin for the pump to keep up,it would be on it's limit.

That's not how they work. The XXgph figure is at some nominal figure (there's no standard that I know of) and the output increases with rpms. At lowish rpms (up to say 3000 or 4000 or so) the output is basically in direct proportion to rpms. At higher rpms it still increases with more speed but starts to level off a bit.

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#34 EunUCh

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Posted 28 February 2015 - 03:53 PM

I should have read through the page before a bit better.....if in theory they can pump about 45gph@6000 then we allow for some leveling off somewhere, and allow a

50% reached decrease in flow rate at some point due to restriction/spring etc once it has leveled and simply can't do any more,it still leaves us with not a bad pump...only in theory of course.

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#35 N/A-PWR

CABIN ENGINE CONTROLS GALORE

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Posted 21 June 2016 - 12:32 AM

So 120l/hr = 26.4 Aust gallons per hour.

A rule of thumb that incorporates a generous 20% safety margin is 400ml/hp/hr

So a 300hp engine would work out to 120l/hr or 2l/min.

Another way to state it would be 1 litre per minute for every 150hp.

But at 6000rpm, the flow rate is almost doubled?

I should have read through the page before a bit better.....if in theory they can pump about 45gph@6000 then we allow for some leveling off somewhere, and allow a

50% reached decrease in flow rate at some point due to restriction/spring etc once it has leveled and simply can't do any more,it still leaves us with not a bad pump...only in theory of course.

The best pump is in our hands, the ACDelco