Kong45
Parking Attendant
Posts: 2
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posted October 11, 2010 04:56 AM
B model fuel pump
Hi all
im running a big bore B model producing 200 bhp and i wanna put a 50 dry shot of gas on, iv been told the fuel pump is only good for 200 bhp, but reading on here it looks like thats for the A model, my question is does anyone for sure know what the B model pump is good for???
Cheers Bob (uk)
Times and speed
Best top speed (timed) 205 mph
Quarters 9.26 @ 153 with 210lb rider plus gear
Bike Spec
1394cc 86mm forged pistons with a cylinder block bored and re-plated to fit, a 60 mm fully nitrided and race-balanced stroker crankshaft, Carillo rods & 2mm stroker plate.
Uprated cylinder studs and uprated valve springs. Schnitz adjustable timing advancer, Schnitz adjustable cam sprockets. Adjustable cam tensioner. Flowed and ported head. 440cc RC Injectors flow tested and matched. Falicon billet clutch basket, Muzzy clutch kit and springs, lock up clutch
  
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almost_les
Zone Head
Posts: 590
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posted October 11, 2010 12:06 PM
upgrade the fuel pump. cheap insurance.
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted November 01, 2010 03:20 PM
You won't regret getting a bigger pump. Your first indication that you should have will be a hole in a piston.
____________
It's not that I think you're dumb, it's just that so much of what you know isn't true....
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almost_les
Zone Head
Posts: 590
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posted November 01, 2010 06:51 PM
 Edited By: almost_les on 2 Nov 2010 02:52
a wlabro gss242 will do the job
http://www.latemodelrestoration.com/item/LRS-9350B/1986-97-Mustang-190-Lph-Walbro-Gss242-Fuel-Pump
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almost_les
Zone Head
Posts: 590
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posted November 01, 2010 07:17 PM
or go with the gss307 if you're upping the pressure
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almost_les
Zone Head
Posts: 590
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posted November 02, 2010 03:39 PM
just redid the math.
440cc/min at 80% duty cycle = 352cc/min
352cc/min * four injectors = 1408cc/min
1408cc/min *60 = 84480cc/hour
84480cc/hour= about 22.3gal/hour
the gss242 pumps 40gal/hr at 40psi at 12v, so almost twice whats needed
at 60psi you'll max injectors at about 25.4 gal/hr and the gss242 will flow 32 gal/hr at 12v.
of course with this all being just some fancy calculations, the best thing to do is data log duty cycle, fuel pressure, and afr's
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