installed bosch 044 inline pump, now problems
I calculated the pressure loss (including both frictional and head losses) of my fuel system to be far less than the figure you quoted. I don't know the ID of the stock system, but I wouldn't use it if fuel pump capacity is a possible limiting factor. All it can do is increase pressure losses and reduce pump efficiency as a result of fuel velocity with respect to the Reynold's number, and that's not good. It's another example of something that people often do, but it's not necessarily good design.
AMS' test appears to be accurate, and a proper fuel system delivers performance that approximates the results reflected in the test. If one's fuel system is inadequate, AMS can't help that.
FYI
Last edited by Ted B; Jan 13, 2010 at 07:27 PM.
Just for the benefit of anyone who is interested, here is a tidy online calculator that gives one an idea of what pressure loss he may experience given specifics of the fuel system:
Fuel Line Calculator
Fuel Line Calculator
Well according to that calculator it would only be 37psi pressure trying to run 100gal/hr through a 1/4in fuel line. If that is the case then 5an line will only lose 13 psi moving 100gal/hr E85 which is enough flow for 4x1600cc injectors. Looks like stock lines are sufficient then forever.
I'm not sure we're looking at the same thing.
4X1600cc/min injectors have a capacity of around 610 lb/hr (1.56 gal/min) of E85.
With 15' of 0.25" ID line, and a 2' rise from pump outlet to rail, the calculated pressure loss when those injectors go static would be greater than 32 psi. That's huge. With gasoline, the loss is even greater.
That doesn't look sufficient to me.
I believe the factory line is closer to AN-6 (0.33" ID). If that is correct, total calculated pressure loss for the same setup is around 9 psi. With AN-8, it drops to a minimal figure.
4X1600cc/min injectors have a capacity of around 610 lb/hr (1.56 gal/min) of E85.
With 15' of 0.25" ID line, and a 2' rise from pump outlet to rail, the calculated pressure loss when those injectors go static would be greater than 32 psi. That's huge. With gasoline, the loss is even greater.
That doesn't look sufficient to me.
I believe the factory line is closer to AN-6 (0.33" ID). If that is correct, total calculated pressure loss for the same setup is around 9 psi. With AN-8, it drops to a minimal figure.
Last edited by Ted B; Jan 13, 2010 at 08:54 PM.
So, your fuel pressure gauge is located under the hood? Why not relocate the gauge to be visible inside the cockpit of your Evo while driving. This way you'll know how your fuel system is functioning at WOT, full voltage, with one pump on, and the changes in pressure that occur when the secondary pump activates.
Last edited by sparky; Jan 13, 2010 at 11:22 PM.
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A walbro intank 255 feeding a bosch 044 inline can and will support 650whp on E85 with 1450-1650cc bluemax injectors. Im talking from experience. Im running the stock fuel feed, stock fuel return and autozone oem style fuel filter. For anyone looking to find anymore information about the bosch 044 pump check this link, BUY THE M5 NEGATIVE TERMINAL NUT BEFORE HAND AT YOUR LOCAL HARDWARE STORE, FINDING THAT THING IS A B!TCH!!
http://www.bosch-motorsport.com/pdf/...mps/FP-200.pdf
http://www.bosch-motorsport.com/pdf/...mps/FP-200.pdf
So, your fuel pressure gauge is located under the hood? Why not relocate the gauge to be visible inside the cockpit of your Evo while driving. This way you'll know how your fuel system is functioning at WOT, full voltage, with one pump on, and the changes in pressure that occur when the secondary pump activates.
Thus far, I really think this route would be more along the lines of what my desires are. What do you fellahs believe I'd be limited to power-wise with the 73HTA Green on E85 with a 2.3L built engine? I have the FIC 1050cc injectors and would like NOT to have to use a double pumper as I can't stomach the price.
Now this is good to know. Maybe one of you more knowledeable fellahs can put together a "no crap" parts list with links to where everything can be purchased.
So I can buy another Walbro fuel pump, run it inline, and call 'er done, right? Now, would my 1050cc injectors be sufficient?
This is very nice to know, my friend.
This is great to hear! Awesome. 
As far as the fuel pressure regulator goes, I just run the standard Aeromotive. Now as for the Bosch, you will need some wire, -6 fuel line, two fuel rail adapters and a bunch of fittings. You will also need at least one relay to control when the pump turns on (you can tap off the ecu harness where the stock fuel pump control wire is).
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Thus far, I really think this route would be more along the lines of what my desires are. What do you fellahs believe I'd be limited to power-wise with the 73HTA Green on E85 with a 2.3L built engine? I have the FIC 1050cc injectors and would like NOT to have to use a double pumper as I can't stomach the price.
Now this is good to know. Maybe one of you more knowledeable fellahs can put together a "no crap" parts list with links to where everything can be purchased.
So I can buy another Walbro fuel pump, run it inline, and call 'er done, right? Now, would my 1050cc injectors be sufficient?
if u already have 1050 inj. ,u should be fine, just add an inline walbro, and call it a day. i doubt your inj. is enough for 500whp thou.
But hey, inline walbro are cheap and it works. The fuel setup on mine VIII are good to 550whp. Good luck bro.
This is very nice to know, my friend.
This is great to hear! Awesome.
Now this is good to know. Maybe one of you more knowledeable fellahs can put together a "no crap" parts list with links to where everything can be purchased.
So I can buy another Walbro fuel pump, run it inline, and call 'er done, right? Now, would my 1050cc injectors be sufficient?
if u already have 1050 inj. ,u should be fine, just add an inline walbro, and call it a day. i doubt your inj. is enough for 500whp thou.
But hey, inline walbro are cheap and it works. The fuel setup on mine VIII are good to 550whp. Good luck bro. This is very nice to know, my friend.
This is great to hear! Awesome.
But hey, inline walbro are cheap and it works. The fuel setup on mine VIII are good to 550whp. Good luck bro.
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well , for mine setup, 550whp is possible. but 600whp, i would add another intank pump to be safe. your 1000cc and e85 with stock turbo is fine.
Is that 1kcc Are enough ?