how much power can 255 make?
- Thread starter bowtiebuba
- Start date
well
math should answer that question
255 lph = 4250 cc per minute.. this is at what ever the rated flow of 255 lph is at.
4250 cc per minute max
so we take that number and calculate
(4250cc/min / 10.5 ) / .5 BSFC hp = 809hp MAX at 255 lph. Now keep in mind that if i recall, the 255 lph is a ZERO psi (ie free flow). That number drops with higher PRESSURE.
ninjaedit: thanks the Grand National guys
http://www.gnttype.org/techarea/fuelsystem/pumpflows/Walbro242Graphsmall.jpg
so with this new information
200 lph @ 45 psi = 3333.33 cc/min
(3333.33cc/min / 10.5 ) / .5 BSFC hp = 634.92 hp.. keep in mind this is CRANK power at 45 PSI now
math should answer that question
255 lph = 4250 cc per minute.. this is at what ever the rated flow of 255 lph is at.
4250 cc per minute max
so we take that number and calculate
(4250cc/min / 10.5 ) / .5 BSFC hp = 809hp MAX at 255 lph. Now keep in mind that if i recall, the 255 lph is a ZERO psi (ie free flow). That number drops with higher PRESSURE.
ninjaedit: thanks the Grand National guys
http://www.gnttype.org/techarea/fuelsystem/pumpflows/Walbro242Graphsmall.jpg
so with this new information
200 lph @ 45 psi = 3333.33 cc/min
(3333.33cc/min / 10.5 ) / .5 BSFC hp = 634.92 hp.. keep in mind this is CRANK power at 45 PSI now
where did you get those formulas and what do they mean? If i had a walbro pump what psi would i want to run with 440s but i want to go bigger injectors but dont know what kind to get im shooting for 500 horse but want to make more some day who knows
basic horsepower calculation formula.. can be had at most fuel injector site but www.rceng.com works fine. Keep in mind to use like values.
42 psi is what the stock 7m sees at the fuel rail without vacuum on. With vacuum on it drop to around 36 BUT as pressure rises the volume of the pump goes down.. see the picture i posted... at 45 psi it looks like 52 gph. At 60 psi it would be flowing only 46 gph instead. 6 gallons difference. BTW at 60 psi that puts you roughly at around 15 psi of boost give or take a few psi at the fuel pump (think rising rate adjustable fuel regulator like aermotive).
42 psi is what the stock 7m sees at the fuel rail without vacuum on. With vacuum on it drop to around 36 BUT as pressure rises the volume of the pump goes down.. see the picture i posted... at 45 psi it looks like 52 gph. At 60 psi it would be flowing only 46 gph instead. 6 gallons difference. BTW at 60 psi that puts you roughly at around 15 psi of boost give or take a few psi at the fuel pump (think rising rate adjustable fuel regulator like aermotive).
basically......more than your "average" 7m LOL:biglaugh:
The 255 if MORE than enough to cope with a 500whp car.
-Jonathan
The 255 if MORE than enough to cope with a 500whp car.
-Jonathan