-
Hi Guest!
You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
There are some perks with a member upgrade!**Upgrade Now**
(PS: Subscribers don't see this gawd-aweful banner
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
GPM requirement for a replacement pump
- Thread starter Kuz
- Start date
Share this page
Offline
Required fuel flow at maximum horsepower is:
The brake Specific fuel consumption of an engine ranges from 0.35 to 0.6 lb/hr/hp. Average is about 0.5 lb/hr/hp.
Gasoline weighs 5.6 to 6.5 lb per gallon. Use 6.0.
Example: 150 hp engine, .5 lb/hr * 150 hp = 75 lb/hr.
75 lb/hr/6 lb/gal = 12.5 gal/hour = 0.21 gal/minute = 1.7 pints/minute.
Example: 100 hp engine, .5 lb * 100 hp = 50 lb/hr
50 lb/6 lb/gal = 8.3 gal/hour = 0.14 gal/minute = 1.12 pints/minute.
A Pump rated at 8.3 gal/hr or more would be required for 100 hp sustained output. 12.5 gal/hour for 150 hp.
D
The brake Specific fuel consumption of an engine ranges from 0.35 to 0.6 lb/hr/hp. Average is about 0.5 lb/hr/hp.
Gasoline weighs 5.6 to 6.5 lb per gallon. Use 6.0.
Example: 150 hp engine, .5 lb/hr * 150 hp = 75 lb/hr.
75 lb/hr/6 lb/gal = 12.5 gal/hour = 0.21 gal/minute = 1.7 pints/minute.
Example: 100 hp engine, .5 lb * 100 hp = 50 lb/hr
50 lb/6 lb/gal = 8.3 gal/hour = 0.14 gal/minute = 1.12 pints/minute.
A Pump rated at 8.3 gal/hr or more would be required for 100 hp sustained output. 12.5 gal/hour for 150 hp.
D
Nunyas
Yoda
Offline
Not quite Steve, I would say they're in agreement /bcforum/images/%%GRAEMLIN_URL%%/grin.gif Dave went into the mathematical detail to derive his flow rate...Steve_S said:
1.12Pints/minute...Dave Russell said:
Doc gave the "rule of thumbs" with his answer and added on top of that a pressure that should not be exceded /bcforum/images/%%GRAEMLIN_URL%%/grin.gif
DrEntropy said:
They're in perfect agreement I would say /bcforum/images/%%GRAEMLIN_URL%%/laugh.gif
Offline
Didn't see Dave's physics lesson 'til jus' now. He musta hit "Submit" at 6:41:56 and I at 6:42:03...
My reply was as general as Keith's question; For all I know it was a quiery into gas station pumps./bcforum/images/%%GRAEMLIN_URL%%/jester.gif
Had it not been th' MG forum of BCF, my immediate response woulda been: "Some!"
/bcforum/images/%%GRAEMLIN_URL%%/devilgrin.gif
My reply was as general as Keith's question; For all I know it was a quiery into gas station pumps./bcforum/images/%%GRAEMLIN_URL%%/jester.gif
Had it not been th' MG forum of BCF, my immediate response woulda been: "Some!"
/bcforum/images/%%GRAEMLIN_URL%%/devilgrin.gif
David_DuBois
Jedi Warrior
Offline
The easy answer is to look at the specifications of the original fuel pump that came in the MGB. For the AUA 150 pumps used on the early (up to mid 64) MGB is 1.1 Pints per minute, for all the later MGBs using the AUF 300/AZX 1300 series pumps it is 2.4 pints per minute. Note, if you look at the Burlen Fuel Systems web sites, the specifications for volume will be slightly different as they are given in Impeiral pints or gallons.
Looking at Dave's figures, it can be seen that the pumps used in the early MGBs was barely adequate and is probably the reason forthe switch to the later pumps (besides the better flow smoothing features of the later pumps.
Cheers,
Looking at Dave's figures, it can be seen that the pumps used in the early MGBs was barely adequate and is probably the reason forthe switch to the later pumps (besides the better flow smoothing features of the later pumps.
Cheers,