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Forced Induction Forum Sponsored by Active Autowerke
Discuss supercharging, turbocharging and even nitrous and water injection here.
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Old 12-17-2009, 06:03 PM   #21
howie
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walbro > *

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Old 01-09-2010, 06:10 PM   #22
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How did this turn out?
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Old 01-09-2010, 07:51 PM   #23
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Walbro FTW! I used the 255lp on my 5.3L V8 Swap in the Jeep.. Works Great! Rated up to 500 or so HP...

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Old 01-09-2010, 09:40 PM   #24
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I've been doing some research and found this...

http://www.fuel-pumps.net/walbro-forgeries.html
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Old 01-09-2010, 09:43 PM   #25
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walbro > *

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I think you meant Bosch, not Walbro.

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Old 01-09-2010, 09:56 PM   #26
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So if I buy the 255lph walbro, do I need some sort of other fitting to hook it up?

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I think you meant Bosch, not Walbro.
I've read that a Bosch 040 is comparable to and lasts longer than the 255lph walbro. Is the Bosch unit also quieter?
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Old 01-09-2010, 11:10 PM   #27
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i'm on tre pump #2

Pump #1 left me stranded in front of a 3-mile long bridge in pensacola in the dark on Christmas

My next move is 040... skip all the walbro stuff and its third world siblings.
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Old 01-10-2010, 12:15 AM   #28
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Cool, good info. Bosch it is! A 040 is a drop in for non-M's or is there some "custom" work involved?

Is $180 a good price?

http://www.expressfuelpumps.com/bosc...nk-p-3804.html

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Old 01-10-2010, 11:21 AM   #29
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Cool, good info. Bosch it is! A 040 is a drop in for non-M's or is there some "custom" work involved?
How much boost are you running that you're having fuel issues? What issues are you having? Why not just run the M3 pump?

I upgraded to the M3 pump a while back in an attempt to resolve my ~ 1/4 tank fuel starvation under hard acceleration problems and haven't had any problems since (my theory is that the non-M pump provided enough fuel for the motor under boost but not enough excess fuel for adequate return flow from the FPR to siphon fuel from the L side to the R side of the tank, thus the pump pickup would go dry).
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Old 01-10-2010, 04:36 PM   #30
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How much boost are you running that you're having fuel issues? What issues are you having? Why not just run the M3 pump?

I upgraded to the M3 pump a while back in an attempt to resolve my ~ 1/4 tank fuel starvation under hard acceleration problems and haven't had any problems since (my theory is that the non-M pump provided enough fuel for the motor under boost but not enough excess fuel for adequate return flow from the FPR to siphon fuel from the L side to the R side of the tank, thus the pump pickup would go dry).
9psi. Fuel isn't the issue, more like the fuel pump is getting old. Just over 90k and I am just researching my options. M3 pump ($317) vrs Bosch 040 ($180 and a little elbow grease).
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Old 01-10-2010, 05:04 PM   #31
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How much boost are you running that you're having fuel issues? What issues are you having? Why not just run the M3 pump?

I upgraded to the M3 pump a while back in an attempt to resolve my ~ 1/4 tank fuel starvation under hard acceleration problems and haven't had any problems since (my theory is that the non-M pump provided enough fuel for the motor under boost but not enough excess fuel for adequate return flow from the FPR to siphon fuel from the L side to the R side of the tank, thus the pump pickup would go dry).
That's a pretty good theory...I hadn't thought of it that way before.
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Old 10-11-2010, 04:19 PM   #32
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Julio...do you still have the Tre pump? If so, how's it holding up?
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Old 10-11-2010, 07:29 PM   #33
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Julio...do you still have the Tre pump? If so, how's it holding up?
my car hasn't run since march... the hardware is together, but since my wiring looks like it was done by wild animals, I'm having someone else do it. At this point I'm waiting on wiring for the car to fire. Due to my fear of the TRE pump failing, I replaced it for a walbro, I have a Bosch inline as well going through a slightly larger line. The TRE filter design actually looked a good bit better than the walbro, but oh well, I'll just keep the fuel level higher at all times. Fuel pressure will be observed in-car.
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Old 10-11-2010, 10:12 PM   #34
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Thanks. So basically I should buy 2 Tre pumps in case 1 goes bad.

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my wiring looks like it was done by wild animals,
...I think the correct term is "bowl of spaghetti".
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Old 10-11-2010, 10:30 PM   #35
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Thanks. So basically I should buy 2 Tre pumps in case 1 goes bad.



...I think the correct term is "bowl of spaghetti".
sort of... yes... if the first one goes out and you return it, you can get another free, or a refund for the second one you purchased.

Real Walbros aren't the most reliable pumps in the universe, but they're not that bad... so its knock-off, which is not that dissimilar in price, is either a) really similar or b)simply worse, unlikely to be c)better... that was my rationalization... leaning on a/c... then to conclude on b
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